feat: 统计数据优化 - 支持细粒度时间范围和多维度分析

- 新增 StatsHourly/StatsDaily 预聚合表，支持任意时区的精确统计 - 实现 UTC datetime 范围查询策略，边界数据实时聚合 - 新增统计 API：用户/API Key 维度、成本分析、性能百分位、错误分类 - 新增前端页面：成本分析、性能分析、用户统计 - 新增 TimeRangePicker 组件和统计可视化组件 - 优化 Dashboard 和 Usage 页面支持时间范围筛选 Close #135
2026-09-01 08:50:21 +08:00 · 2026-02-04 02:04:54 +08:00
parent 6f363a7703
commit f3e2f84b38
59 changed files with 6392 additions and 500 deletions
--- a/alembic/versions/20260204_1200_add_stats_hourly_and_daily_complete_flag.py
+++ b/alembic/versions/20260204_1200_add_stats_hourly_and_daily_complete_flag.py
@@ -0,0 +1,339 @@
+"""add_stats_hourly_and_daily_complete_flag
+
+Revision ID: c4e8f9a1b2c3
+Revises: b3c4d5e6f7a8
+Create Date: 2026-02-04 12:00:00.000000
+
+"""
+
+from __future__ import annotations
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from sqlalchemy import inspect
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "c4e8f9a1b2c3"
+down_revision: Union[str, None] = "b3c4d5e6f7a8"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def _table_exists(table_name: str) -> bool:
+    bind = op.get_bind()
+    inspector = inspect(bind)
+    return table_name in inspector.get_table_names()
+
+
+def _index_exists(table_name: str, index_name: str) -> bool:
+    bind = op.get_bind()
+    inspector = inspect(bind)
+    indexes = [idx["name"] for idx in inspector.get_indexes(table_name)]
+    return index_name in indexes
+
+
+def _column_exists(table_name: str, column_name: str) -> bool:
+    bind = op.get_bind()
+    inspector = inspect(bind)
+    columns = [col["name"] for col in inspector.get_columns(table_name)]
+    return column_name in columns
+
+
+def upgrade() -> None:
+    if _table_exists("stats_daily"):
+        if not _column_exists("stats_daily", "is_complete"):
+            op.add_column(
+                "stats_daily",
+                sa.Column("is_complete", sa.Boolean(), nullable=False, server_default=sa.false()),
+            )
+            op.execute("UPDATE stats_daily SET is_complete = true")
+        if not _column_exists("stats_daily", "aggregated_at"):
+            op.add_column(
+                "stats_daily",
+                sa.Column("aggregated_at", sa.DateTime(timezone=True), nullable=True),
+            )
+
+    if not _table_exists("stats_hourly"):
+        op.create_table(
+            "stats_hourly",
+            sa.Column("id", sa.String(length=36), nullable=False),
+            sa.Column("hour_utc", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("total_requests", sa.Integer(), nullable=False),
+            sa.Column("success_requests", sa.Integer(), nullable=False),
+            sa.Column("error_requests", sa.Integer(), nullable=False),
+            sa.Column("input_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("output_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("cache_creation_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("cache_read_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("total_cost", sa.Float(), nullable=False),
+            sa.Column("actual_total_cost", sa.Float(), nullable=False),
+            sa.Column("avg_response_time_ms", sa.Float(), nullable=False),
+            sa.Column("is_complete", sa.Boolean(), nullable=False),
+            sa.Column("aggregated_at", sa.DateTime(timezone=True), nullable=True),
+            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+            sa.PrimaryKeyConstraint("id"),
+            sa.UniqueConstraint("hour_utc", name="uq_stats_hourly_hour"),
+        )
+        op.create_index("idx_stats_hourly_hour", "stats_hourly", ["hour_utc"], unique=False)
+
+    if not _table_exists("stats_hourly_user"):
+        op.create_table(
+            "stats_hourly_user",
+            sa.Column("id", sa.String(length=36), nullable=False),
+            sa.Column("hour_utc", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("user_id", sa.String(length=36), nullable=False),
+            sa.Column("total_requests", sa.Integer(), nullable=False),
+            sa.Column("success_requests", sa.Integer(), nullable=False),
+            sa.Column("error_requests", sa.Integer(), nullable=False),
+            sa.Column("input_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("output_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("total_cost", sa.Float(), nullable=False),
+            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+            sa.PrimaryKeyConstraint("id"),
+            sa.UniqueConstraint("hour_utc", "user_id", name="uq_stats_hourly_user"),
+        )
+        op.create_index(
+            "idx_stats_hourly_user_hour", "stats_hourly_user", ["hour_utc"], unique=False
+        )
+        op.create_index(
+            "idx_stats_hourly_user_user_hour",
+            "stats_hourly_user",
+            ["user_id", "hour_utc"],
+            unique=False,
+        )
+
+    if not _table_exists("stats_hourly_model"):
+        op.create_table(
+            "stats_hourly_model",
+            sa.Column("id", sa.String(length=36), nullable=False),
+            sa.Column("hour_utc", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("model", sa.String(length=100), nullable=False),
+            sa.Column("total_requests", sa.Integer(), nullable=False),
+            sa.Column("input_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("output_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("total_cost", sa.Float(), nullable=False),
+            sa.Column("avg_response_time_ms", sa.Float(), nullable=False),
+            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+            sa.PrimaryKeyConstraint("id"),
+            sa.UniqueConstraint("hour_utc", "model", name="uq_stats_hourly_model"),
+        )
+        op.create_index(
+            "idx_stats_hourly_model_hour", "stats_hourly_model", ["hour_utc"], unique=False
+        )
+        op.create_index(
+            "idx_stats_hourly_model_model_hour",
+            "stats_hourly_model",
+            ["model", "hour_utc"],
+            unique=False,
+        )
+
+    if not _table_exists("stats_hourly_provider"):
+        op.create_table(
+            "stats_hourly_provider",
+            sa.Column("id", sa.String(length=36), nullable=False),
+            sa.Column("hour_utc", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("provider_name", sa.String(length=100), nullable=False),
+            sa.Column("total_requests", sa.Integer(), nullable=False),
+            sa.Column("input_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("output_tokens", sa.BigInteger(), nullable=False),
+            sa.Column("total_cost", sa.Float(), nullable=False),
+            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
+            sa.PrimaryKeyConstraint("id"),
+            sa.UniqueConstraint("hour_utc", "provider_name", name="uq_stats_hourly_provider"),
+        )
+        op.create_index(
+            "idx_stats_hourly_provider_hour",
+            "stats_hourly_provider",
+            ["hour_utc"],
+            unique=False,
+        )
+
+    if not _table_exists("stats_daily_api_key"):
+        op.create_table(
+            "stats_daily_api_key",
+            sa.Column("id", sa.String(length=36), primary_key=True),
+            sa.Column(
+                "api_key_id",
+                sa.String(length=36),
+                sa.ForeignKey("api_keys.id", ondelete="CASCADE"),
+                nullable=False,
+            ),
+            sa.Column("date", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("total_requests", sa.Integer(), nullable=False, server_default="0"),
+            sa.Column("success_requests", sa.Integer(), nullable=False, server_default="0"),
+            sa.Column("error_requests", sa.Integer(), nullable=False, server_default="0"),
+            sa.Column("input_tokens", sa.BigInteger(), nullable=False, server_default="0"),
+            sa.Column("output_tokens", sa.BigInteger(), nullable=False, server_default="0"),
+            sa.Column("cache_creation_tokens", sa.BigInteger(), nullable=False, server_default="0"),
+            sa.Column("cache_read_tokens", sa.BigInteger(), nullable=False, server_default="0"),
+            sa.Column("total_cost", sa.Float(), nullable=False, server_default="0"),
+            sa.Column(
+                "created_at",
+                sa.DateTime(timezone=True),
+                nullable=False,
+                server_default=sa.text("CURRENT_TIMESTAMP"),
+            ),
+            sa.Column(
+                "updated_at",
+                sa.DateTime(timezone=True),
+                nullable=False,
+                server_default=sa.text("CURRENT_TIMESTAMP"),
+            ),
+            sa.UniqueConstraint("api_key_id", "date", name="uq_stats_daily_api_key"),
+        )
+
+    if _table_exists("stats_daily_api_key"):
+        if not _index_exists("stats_daily_api_key", "idx_stats_daily_api_key_date"):
+            op.create_index("idx_stats_daily_api_key_date", "stats_daily_api_key", ["date"])
+        if not _index_exists("stats_daily_api_key", "idx_stats_daily_api_key_key_date"):
+            op.create_index(
+                "idx_stats_daily_api_key_key_date",
+                "stats_daily_api_key",
+                ["api_key_id", "date"],
+            )
+        if not _index_exists("stats_daily_api_key", "idx_stats_daily_api_key_date_requests"):
+            op.create_index(
+                "idx_stats_daily_api_key_date_requests",
+                "stats_daily_api_key",
+                ["date", "total_requests"],
+            )
+        if not _index_exists("stats_daily_api_key", "idx_stats_daily_api_key_date_cost"):
+            op.create_index(
+                "idx_stats_daily_api_key_date_cost",
+                "stats_daily_api_key",
+                ["date", "total_cost"],
+            )
+
+    if _table_exists("usage"):
+        if not _column_exists("usage", "error_category"):
+            op.add_column(
+                "usage",
+                sa.Column("error_category", sa.String(length=50), nullable=True),
+            )
+            op.create_index("idx_usage_error_category", "usage", ["error_category"], unique=False)
+
+    if _table_exists("stats_daily"):
+        for name in (
+            "p50_response_time_ms",
+            "p90_response_time_ms",
+            "p99_response_time_ms",
+            "p50_first_byte_time_ms",
+            "p90_first_byte_time_ms",
+            "p99_first_byte_time_ms",
+        ):
+            if not _column_exists("stats_daily", name):
+                op.add_column("stats_daily", sa.Column(name, sa.Integer(), nullable=True))
+
+    if not _table_exists("stats_daily_error"):
+        op.create_table(
+            "stats_daily_error",
+            sa.Column("id", sa.String(length=36), primary_key=True),
+            sa.Column("date", sa.DateTime(timezone=True), nullable=False),
+            sa.Column("error_category", sa.String(length=50), nullable=False),
+            sa.Column("provider_name", sa.String(length=100), nullable=True),
+            sa.Column("model", sa.String(length=100), nullable=True),
+            sa.Column("count", sa.Integer(), nullable=False, server_default="0"),
+            sa.Column(
+                "created_at",
+                sa.DateTime(timezone=True),
+                nullable=False,
+                server_default=sa.text("CURRENT_TIMESTAMP"),
+            ),
+            sa.Column(
+                "updated_at",
+                sa.DateTime(timezone=True),
+                nullable=False,
+                server_default=sa.text("CURRENT_TIMESTAMP"),
+            ),
+            sa.UniqueConstraint(
+                "date",
+                "error_category",
+                "provider_name",
+                "model",
+                name="uq_stats_daily_error",
+            ),
+        )
+
+    if _table_exists("stats_daily_error"):
+        if not _index_exists("stats_daily_error", "idx_stats_daily_error_date"):
+            op.create_index("idx_stats_daily_error_date", "stats_daily_error", ["date"])
+        if not _index_exists("stats_daily_error", "idx_stats_daily_error_category"):
+            op.create_index(
+                "idx_stats_daily_error_category",
+                "stats_daily_error",
+                ["date", "error_category"],
+            )
+
+
+def downgrade() -> None:
+    if _table_exists("stats_daily_error"):
+        if _index_exists("stats_daily_error", "idx_stats_daily_error_category"):
+            op.drop_index("idx_stats_daily_error_category", table_name="stats_daily_error")
+        if _index_exists("stats_daily_error", "idx_stats_daily_error_date"):
+            op.drop_index("idx_stats_daily_error_date", table_name="stats_daily_error")
+        op.drop_table("stats_daily_error")
+
+    if _table_exists("stats_daily"):
+        for name in (
+            "p50_response_time_ms",
+            "p90_response_time_ms",
+            "p99_response_time_ms",
+            "p50_first_byte_time_ms",
+            "p90_first_byte_time_ms",
+            "p99_first_byte_time_ms",
+        ):
+            if _column_exists("stats_daily", name):
+                op.drop_column("stats_daily", name)
+
+    if _table_exists("usage") and _column_exists("usage", "error_category"):
+        if _index_exists("usage", "idx_usage_error_category"):
+            op.drop_index("idx_usage_error_category", table_name="usage")
+        op.drop_column("usage", "error_category")
+
+    if _table_exists("stats_daily_api_key"):
+        if _index_exists("stats_daily_api_key", "idx_stats_daily_api_key_date_cost"):
+            op.drop_index("idx_stats_daily_api_key_date_cost", table_name="stats_daily_api_key")
+        if _index_exists("stats_daily_api_key", "idx_stats_daily_api_key_date_requests"):
+            op.drop_index("idx_stats_daily_api_key_date_requests", table_name="stats_daily_api_key")
+        if _index_exists("stats_daily_api_key", "idx_stats_daily_api_key_key_date"):
+            op.drop_index("idx_stats_daily_api_key_key_date", table_name="stats_daily_api_key")
+        if _index_exists("stats_daily_api_key", "idx_stats_daily_api_key_date"):
+            op.drop_index("idx_stats_daily_api_key_date", table_name="stats_daily_api_key")
+        op.drop_table("stats_daily_api_key")
+
+    if _table_exists("stats_hourly_provider"):
+        if _index_exists("stats_hourly_provider", "idx_stats_hourly_provider_hour"):
+            op.drop_index("idx_stats_hourly_provider_hour", table_name="stats_hourly_provider")
+        op.drop_table("stats_hourly_provider")
+
+    if _table_exists("stats_hourly_model"):
+        if _index_exists("stats_hourly_model", "idx_stats_hourly_model_model_hour"):
+            op.drop_index("idx_stats_hourly_model_model_hour", table_name="stats_hourly_model")
+        if _index_exists("stats_hourly_model", "idx_stats_hourly_model_hour"):
+            op.drop_index("idx_stats_hourly_model_hour", table_name="stats_hourly_model")
+        op.drop_table("stats_hourly_model")
+
+    if _table_exists("stats_hourly_user"):
+        if _index_exists("stats_hourly_user", "idx_stats_hourly_user_user_hour"):
+            op.drop_index("idx_stats_hourly_user_user_hour", table_name="stats_hourly_user")
+        if _index_exists("stats_hourly_user", "idx_stats_hourly_user_hour"):
+            op.drop_index("idx_stats_hourly_user_hour", table_name="stats_hourly_user")
+        op.drop_table("stats_hourly_user")
+
+    if _table_exists("stats_hourly"):
+        if _index_exists("stats_hourly", "idx_stats_hourly_hour"):
+            op.drop_index("idx_stats_hourly_hour", table_name="stats_hourly")
+        op.drop_table("stats_hourly")
+
+    if _table_exists("stats_daily"):
+        if _column_exists("stats_daily", "aggregated_at"):
+            op.drop_column("stats_daily", "aggregated_at")
+        if _column_exists("stats_daily", "is_complete"):
+            op.drop_column("stats_daily", "is_complete")
--- a/frontend/src/api/admin.ts
+++ b/frontend/src/api/admin.ts
@@ -340,6 +340,102 @@ export interface AdminApiKeysResponse {
  skip: number
 }

+export interface LeaderboardItem {
+  rank: number
+  id: string
+  name: string
+  value: number
+  requests: number
+  tokens: number
+  cost: number
+}
+
+export interface LeaderboardResponse {
+  items: LeaderboardItem[]
+  total: number
+  metric: string
+  start_date?: string | null
+  end_date?: string | null
+}
+
+export interface CostForecastResponse {
+  history: Array<{ date: string; total_cost: number }>
+  forecast: Array<{ date: string; total_cost: number }>
+  slope: number
+  intercept: number
+  start_date: string
+  end_date: string
+}
+
+export interface CostSavingsResponse {
+  cache_read_tokens: number
+  cache_read_cost: number
+  cache_creation_cost: number
+  estimated_full_cost: number
+  cache_savings: number
+}
+
+export interface QuotaUsageProvider {
+  id: string
+  name: string
+  quota_usd: number
+  used_usd: number
+  remaining_usd: number
+  usage_percent: number
+  quota_expires_at?: string | null
+  estimated_exhaust_at?: string | null
+}
+
+export interface QuotaUsageResponse {
+  providers: QuotaUsageProvider[]
+}
+
+export interface PercentileItem {
+  date: string
+  p50_response_time_ms?: number | null
+  p90_response_time_ms?: number | null
+  p99_response_time_ms?: number | null
+  p50_first_byte_time_ms?: number | null
+  p90_first_byte_time_ms?: number | null
+  p99_first_byte_time_ms?: number | null
+}
+
+export interface ErrorDistributionItem {
+  category: string
+  count: number
+}
+
+export interface ErrorTrendItem {
+  date: string
+  total: number
+  categories: Record<string, number>
+}
+
+export interface ErrorDistributionResponse {
+  distribution: ErrorDistributionItem[]
+  trend: ErrorTrendItem[]
+}
+
+export interface ComparisonMetric {
+  total_requests: number
+  total_tokens: number
+  total_cost: number
+  actual_total_cost: number
+  avg_response_time_ms: number
+  error_requests: number
+}
+
+export interface ComparisonResponse {
+  current: ComparisonMetric
+  comparison: ComparisonMetric
+  change_percent: Record<string, number | null>
+  current_start: string
+  current_end: string
+  comparison_start: string
+  comparison_end: string
+}
+
+
 export interface ApiKeyToggleResponse {
  id: string // UUID
  is_active: boolean
@@ -617,4 +713,156 @@ export const adminApi = {
    const response = await apiClient.post<LdapTestResponse>('/api/admin/ldap/test', config)
    return response.data
  },
+
+  // Stats / Leaderboards
+  async getLeaderboardUsers(params?: {
+    start_date?: string
+    end_date?: string
+    preset?: string
+    timezone?: string
+    tz_offset_minutes?: number
+    metric?: 'requests' | 'tokens' | 'cost'
+    order?: 'asc' | 'desc'
+    limit?: number
+    offset?: number
+    provider_name?: string
+    model?: string
+    include_inactive?: boolean
+    exclude_admin?: boolean
+  }): Promise<LeaderboardResponse> {
+    const response = await apiClient.get<LeaderboardResponse>('/api/admin/stats/leaderboard/users', {
+      params
+    })
+    return response.data
+  },
+
+  async getLeaderboardApiKeys(params?: {
+    start_date?: string
+    end_date?: string
+    preset?: string
+    timezone?: string
+    tz_offset_minutes?: number
+    metric?: 'requests' | 'tokens' | 'cost'
+    order?: 'asc' | 'desc'
+    limit?: number
+    offset?: number
+    provider_name?: string
+    model?: string
+    include_inactive?: boolean
+    exclude_admin?: boolean
+  }): Promise<LeaderboardResponse> {
+    const response = await apiClient.get<LeaderboardResponse>('/api/admin/stats/leaderboard/api-keys', {
+      params
+    })
+    return response.data
+  },
+
+  async getLeaderboardModels(params?: {
+    start_date?: string
+    end_date?: string
+    preset?: string
+    timezone?: string
+    tz_offset_minutes?: number
+    metric?: 'requests' | 'tokens' | 'cost'
+    order?: 'asc' | 'desc'
+    limit?: number
+    offset?: number
+    provider_name?: string
+    model?: string
+  }): Promise<LeaderboardResponse> {
+    const response = await apiClient.get<LeaderboardResponse>('/api/admin/stats/leaderboard/models', {
+      params
+    })
+    return response.data
+  },
+
+  async getCostForecast(params?: {
+    start_date?: string
+    end_date?: string
+    preset?: string
+    timezone?: string
+    tz_offset_minutes?: number
+    days?: number
+    forecast_days?: number
+  }): Promise<CostForecastResponse> {
+    const response = await apiClient.get<CostForecastResponse>('/api/admin/stats/cost/forecast', {
+      params
+    })
+    return response.data
+  },
+
+  async getCostSavings(params?: {
+    start_date?: string
+    end_date?: string
+    preset?: string
+    timezone?: string
+    tz_offset_minutes?: number
+    provider_name?: string
+    model?: string
+  }): Promise<CostSavingsResponse> {
+    const response = await apiClient.get<CostSavingsResponse>('/api/admin/stats/cost/savings', {
+      params
+    })
+    return response.data
+  },
+
+  async getQuotaUsage(): Promise<QuotaUsageResponse> {
+    const response = await apiClient.get<QuotaUsageResponse>('/api/admin/stats/providers/quota-usage')
+    return response.data
+  },
+
+  async getPercentiles(params?: {
+    start_date?: string
+    end_date?: string
+    preset?: string
+    timezone?: string
+    tz_offset_minutes?: number
+  }): Promise<PercentileItem[]> {
+    const response = await apiClient.get<PercentileItem[]>('/api/admin/stats/performance/percentiles', {
+      params
+    })
+    return response.data
+  },
+
+  async getErrorDistribution(params?: {
+    start_date?: string
+    end_date?: string
+    preset?: string
+    timezone?: string
+    tz_offset_minutes?: number
+  }): Promise<ErrorDistributionResponse> {
+    const response = await apiClient.get<ErrorDistributionResponse>('/api/admin/stats/errors/distribution', {
+      params
+    })
+    return response.data
+  },
+
+  async getComparison(params: {
+    current_start: string
+    current_end: string
+    comparison_type?: 'period' | 'year'
+    timezone?: string
+    tz_offset_minutes?: number
+  }): Promise<ComparisonResponse> {
+    const response = await apiClient.get<ComparisonResponse>('/api/admin/stats/comparison', {
+      params
+    })
+    return response.data
+  },
+
+  async getTimeSeries(params?: {
+    start_date?: string
+    end_date?: string
+    preset?: string
+    granularity?: 'hour' | 'day' | 'week' | 'month'
+    timezone?: string
+    tz_offset_minutes?: number
+    user_id?: string
+    model?: string
+    provider_name?: string
+  }): Promise<any[]> {
+    const response = await apiClient.get<any[]>('/api/admin/stats/time-series', { params })
+    return response.data
+  },
+
 }
--- a/frontend/src/api/dashboard.ts
+++ b/frontend/src/api/dashboard.ts
@@ -250,10 +250,19 @@ export interface DailyStatsResponse {
  }
 }

+export interface TimeRangeParams {
+  start_date?: string
+  end_date?: string
+  preset?: string
+  granularity?: 'hour' | 'day' | 'week' | 'month'
+  timezone?: string
+  tz_offset_minutes?: number
+}
+
 export const dashboardApi = {
  // 获取仪表盘统计数据
-  async getStats(): Promise<DashboardStatsResponse> {
-    const response = await apiClient.get<DashboardStatsResponse>('/api/dashboard/stats')
+  async getStats(params?: TimeRangeParams): Promise<DashboardStatsResponse> {
+    const response = await apiClient.get<DashboardStatsResponse>('/api/dashboard/stats', { params })
    return response.data
  },

@@ -279,9 +288,9 @@ export const dashboardApi = {
  },

  // 获取每日统计数据
-  async getDailyStats(days: number = 7): Promise<DailyStatsResponse> {
+  async getDailyStats(params?: TimeRangeParams & { days?: number }): Promise<DailyStatsResponse> {
    const response = await apiClient.get<DailyStatsResponse>('/api/dashboard/daily-stats', {
-      params: { days }
+      params
    })
    return response.data
  }
--- a/frontend/src/api/me.ts
+++ b/frontend/src/api/me.ts
@@ -201,6 +201,9 @@ export const meApi = {
  async getUsage(params?: {
    start_date?: string
    end_date?: string
+    preset?: string
+    timezone?: string
+    tz_offset_minutes?: number
    search?: string  // 通用搜索：密钥名、模型名
    limit?: number
    offset?: number
--- a/frontend/src/api/usage.ts
+++ b/frontend/src/api/usage.ts
@@ -78,6 +78,10 @@ export interface UsageFilters {
  model?: string
  start_date?: string
  end_date?: string
+  preset?: string
+  granularity?: 'hour' | 'day' | 'week' | 'month'
+  timezone?: string
+  tz_offset_minutes?: number
  page?: number
  page_size?: number
 }
@@ -164,11 +168,16 @@ export const usageApi = {
  async getAllUsageRecords(params?: {
    start_date?: string
    end_date?: string
+    preset?: string
+    granularity?: 'hour' | 'day' | 'week' | 'month'
+    timezone?: string
+    tz_offset_minutes?: number
    search?: string  // 通用搜索：用户名、密钥名、模型名、提供商名
    user_id?: string // UUID
    username?: string
    model?: string
    provider?: string
+    api_format?: string  // API 格式筛选（如 openai:chat, claude:chat）
    status?: string // 'stream' | 'standard' | 'error'
    limit?: number
    offset?: number
--- a/frontend/src/components/common/TimeRangePicker.vue
+++ b/frontend/src/components/common/TimeRangePicker.vue
@@ -0,0 +1,131 @@
+<template>
+  <div class="flex flex-wrap items-center gap-2">
+    <Select v-model:open="presetSelectOpen" v-model="selectedPreset">
+      <SelectTrigger class="h-8 w-32 text-xs border-border/60">
+        <SelectValue placeholder="选择时间段" />
+      </SelectTrigger>
+      <SelectContent>
+        <SelectItem value="today">今天</SelectItem>
+        <SelectItem value="yesterday">昨天</SelectItem>
+        <SelectItem value="last7days">最近7天</SelectItem>
+        <SelectItem value="last30days">最近30天</SelectItem>
+        <SelectItem value="last90days">最近90天</SelectItem>
+        <SelectItem value="this_week">本周</SelectItem>
+        <SelectItem value="last_week">上周</SelectItem>
+        <SelectItem value="this_month">本月</SelectItem>
+        <SelectItem value="last_month">上月</SelectItem>
+        <SelectItem value="this_year">今年</SelectItem>
+        <SelectItem value="custom">自定义</SelectItem>
+      </SelectContent>
+    </Select>
+
+    <div
+      v-if="selectedPreset === 'custom'"
+      class="flex items-center gap-2"
+    >
+      <Input
+        v-model="startDate"
+        type="date"
+        class="h-8 w-36 text-xs border-border/60"
+      />
+      <span class="text-xs text-muted-foreground">至</span>
+      <Input
+        v-model="endDate"
+        type="date"
+        class="h-8 w-36 text-xs border-border/60"
+      />
+    </div>
+
+    <Select v-if="showGranularity" v-model:open="granularitySelectOpen" v-model="selectedGranularity">
+      <SelectTrigger class="h-8 w-24 text-xs border-border/60">
+        <SelectValue placeholder="粒度" />
+      </SelectTrigger>
+      <SelectContent>
+        <SelectItem v-if="allowHourly && canUseHourly" value="hour">小时</SelectItem>
+        <SelectItem value="day">天</SelectItem>
+        <SelectItem value="week">周</SelectItem>
+        <SelectItem value="month">月</SelectItem>
+      </SelectContent>
+    </Select>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed, ref, watch } from 'vue'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+  Input
+} from '@/components/ui'
+import type { DateRangeParams } from '@/features/usage/types'
+
+const props = defineProps<{
+  modelValue: DateRangeParams
+  showGranularity?: boolean
+  allowHourly?: boolean
+}>()
+
+const emit = defineEmits<{
+  'update:modelValue': [value: DateRangeParams]
+}>()
+
+const selectedPreset = ref(props.modelValue.preset || 'last7days')
+const startDate = ref(props.modelValue.start_date || '')
+const endDate = ref(props.modelValue.end_date || '')
+const selectedGranularity = ref(props.modelValue.granularity || 'day')
+const presetSelectOpen = ref(false)
+const granularitySelectOpen = ref(false)
+
+const showGranularity = computed(() => props.showGranularity !== false)
+const allowHourly = computed(() => props.allowHourly === true)
+
+const canUseHourly = computed(() => {
+  if (selectedPreset.value === 'today' || selectedPreset.value === 'yesterday') return true
+  if (selectedPreset.value === 'custom' && startDate.value && endDate.value) {
+    return startDate.value === endDate.value
+  }
+  return false
+})
+
+watch(() => props.modelValue, (value) => {
+  if (value.preset) selectedPreset.value = value.preset
+  if (value.start_date !== undefined) startDate.value = value.start_date || ''
+  if (value.end_date !== undefined) endDate.value = value.end_date || ''
+  if (value.granularity) selectedGranularity.value = value.granularity
+}, { deep: true })
+
+watch([selectedPreset, startDate, endDate, selectedGranularity], () => {
+  if (!allowHourly.value || !canUseHourly.value) {
+    if (selectedGranularity.value === 'hour') {
+      selectedGranularity.value = 'day'
+    }
+  }
+
+  const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone
+  const tz_offset_minutes = -new Date().getTimezoneOffset()
+
+  if (selectedPreset.value === 'custom') {
+    if (!startDate.value || !endDate.value) return
+    const start = startDate.value <= endDate.value ? startDate.value : endDate.value
+    const end = endDate.value >= startDate.value ? endDate.value : startDate.value
+    emit('update:modelValue', {
+      start_date: start,
+      end_date: end,
+      granularity: selectedGranularity.value,
+      timezone,
+      tz_offset_minutes
+    })
+    return
+  }
+
+  emit('update:modelValue', {
+    preset: selectedPreset.value,
+    granularity: selectedGranularity.value,
+    timezone,
+    tz_offset_minutes
+  })
+}, { immediate: true })
+</script>
--- a/frontend/src/components/common/index.ts
+++ b/frontend/src/components/common/index.ts
@@ -10,3 +10,4 @@ export { default as LoadingState } from './LoadingState.vue'

 // 表单组件
 export { default as ModelMultiSelect } from './ModelMultiSelect.vue'
+export { default as TimeRangePicker } from './TimeRangePicker.vue'
--- a/frontend/src/components/stats/ComparisonCard.vue
+++ b/frontend/src/components/stats/ComparisonCard.vue
@@ -0,0 +1,31 @@
+<template>
+  <Card class="p-4 space-y-2">
+    <div class="text-xs text-muted-foreground">{{ label }}</div>
+    <div class="text-lg font-semibold">{{ value }}</div>
+    <div class="text-xs" :class="changeClass">
+      <span v-if="changePercent !== null">{{ changePercent }}%</span>
+      <span v-else>--</span>
+      <span class="ml-1 text-muted-foreground">vs 对比期</span>
+    </div>
+  </Card>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import { Card } from '@/components/ui'
+
+interface Props {
+  label: string
+  value: string
+  changePercent: number | null
+}
+
+const props = defineProps<Props>()
+
+const changeClass = computed(() => {
+  if (props.changePercent === null) return 'text-muted-foreground'
+  if (props.changePercent > 0) return 'text-emerald-500'
+  if (props.changePercent < 0) return 'text-rose-500'
+  return 'text-muted-foreground'
+})
+</script>
--- a/frontend/src/components/stats/CostForecastChart.vue
+++ b/frontend/src/components/stats/CostForecastChart.vue
@@ -0,0 +1,78 @@
+<template>
+  <div class="space-y-3">
+    <div class="flex items-center justify-between">
+      <h3 class="text-sm font-semibold">{{ title }}</h3>
+      <span class="text-xs text-muted-foreground" v-if="subtitle">{{ subtitle }}</span>
+    </div>
+    <div v-if="loading" class="p-6">
+      <LoadingState />
+    </div>
+    <div v-else class="h-[280px]">
+      <LineChart :data="chartData" :options="chartOptions" />
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import LineChart from '@/components/charts/LineChart.vue'
+import { LoadingState } from '@/components/common'
+import { formatCurrency } from '@/utils/format'
+
+interface Props {
+  title: string
+  subtitle?: string
+  history: Array<{ date: string; total_cost: number }>
+  forecast: Array<{ date: string; total_cost: number }>
+  loading?: boolean
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  loading: false
+})
+
+const labels = computed(() => [
+  ...props.history.map(item => item.date),
+  ...props.forecast.map(item => item.date)
+])
+
+const chartData = computed(() => {
+  const historyValues = props.history.map(item => item.total_cost)
+  const forecastValues = props.forecast.map(item => item.total_cost)
+  return {
+    labels: labels.value,
+    datasets: [
+      {
+        label: '实际成本',
+        data: historyValues.concat(new Array(forecastValues.length).fill(null)),
+        borderColor: 'rgb(59, 130, 246)',
+        backgroundColor: 'rgba(59, 130, 246, 0.15)',
+        tension: 0.25,
+        pointRadius: 2
+      },
+      {
+        label: '预测成本',
+        data: new Array(historyValues.length).fill(null).concat(forecastValues),
+        borderColor: 'rgb(234, 179, 8)',
+        backgroundColor: 'rgba(234, 179, 8, 0.15)',
+        borderDash: [6, 4],
+        tension: 0.25,
+        pointRadius: 2
+      }
+    ]
+  }
+})
+
+const chartOptions = computed(() => ({
+  plugins: {
+    tooltip: {
+      callbacks: {
+        label: (context: any) => {
+          const value = context.parsed?.y ?? 0
+          return `${context.dataset.label}: ${formatCurrency(value)}`
+        }
+      }
+    }
+  }
+}))
+</script>
--- a/frontend/src/components/stats/ErrorDistributionChart.vue
+++ b/frontend/src/components/stats/ErrorDistributionChart.vue
@@ -0,0 +1,57 @@
+<template>
+  <div class="space-y-3">
+    <div class="flex items-center justify-between">
+      <h3 class="text-sm font-semibold">{{ title }}</h3>
+      <span class="text-xs text-muted-foreground" v-if="subtitle">{{ subtitle }}</span>
+    </div>
+    <div v-if="loading" class="p-6">
+      <LoadingState />
+    </div>
+    <div v-else class="h-[260px]">
+      <DoughnutChart :data="chartData" :options="chartOptions" />
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import DoughnutChart from '@/components/charts/DoughnutChart.vue'
+import { LoadingState } from '@/components/common'
+import type { ErrorDistributionItem } from '@/api/admin'
+
+interface Props {
+  title: string
+  subtitle?: string
+  distribution: ErrorDistributionItem[]
+  loading?: boolean
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  loading: false
+})
+
+const chartData = computed(() => ({
+  labels: props.distribution.map(item => item.category),
+  datasets: [
+    {
+      data: props.distribution.map(item => item.count),
+      backgroundColor: [
+        'rgba(239, 68, 68, 0.7)',
+        'rgba(59, 130, 246, 0.7)',
+        'rgba(234, 179, 8, 0.7)',
+        'rgba(34, 197, 94, 0.7)',
+        'rgba(148, 163, 184, 0.7)'
+      ],
+      borderWidth: 0
+    }
+  ]
+}))
+
+const chartOptions = computed(() => ({
+  plugins: {
+    legend: {
+      position: 'bottom' as const
+    }
+  }
+}))
+</script>
--- a/frontend/src/components/stats/LeaderboardTable.vue
+++ b/frontend/src/components/stats/LeaderboardTable.vue
@@ -0,0 +1,95 @@
+<template>
+  <TableCard :title="title">
+    <template #actions>
+      <Select
+        v-if="showMetricSelect"
+        v-model:open="metricSelectOpen"
+        :model-value="metric"
+        @update:model-value="emitMetric"
+      >
+        <SelectTrigger class="h-8 text-xs w-28">
+          <SelectValue placeholder="指标" />
+        </SelectTrigger>
+        <SelectContent>
+          <SelectItem value="requests">请求数</SelectItem>
+          <SelectItem value="tokens">Tokens</SelectItem>
+          <SelectItem value="cost">成本</SelectItem>
+        </SelectContent>
+      </Select>
+    </template>
+
+    <div v-if="loading" class="p-6">
+      <LoadingState />
+    </div>
+    <div v-else-if="items.length === 0" class="p-6">
+      <EmptyState title="暂无数据" description="当前时间范围内没有统计结果" />
+    </div>
+    <Table v-else>
+      <TableHeader>
+        <TableRow>
+          <TableHead class="w-16">排名</TableHead>
+          <TableHead>名称</TableHead>
+          <TableHead class="text-right">请求数</TableHead>
+          <TableHead class="text-right">Tokens</TableHead>
+          <TableHead class="text-right">成本</TableHead>
+        </TableRow>
+      </TableHeader>
+      <TableBody>
+        <TableRow v-for="item in items" :key="item.id">
+          <TableCell class="font-medium">{{ item.rank }}</TableCell>
+          <TableCell>{{ item.name }}</TableCell>
+          <TableCell class="text-right">{{ item.requests }}</TableCell>
+          <TableCell class="text-right">{{ formatTokens(item.tokens) }}</TableCell>
+          <TableCell class="text-right">{{ formatCurrency(item.cost) }}</TableCell>
+        </TableRow>
+      </TableBody>
+    </Table>
+  </TableCard>
+</template>
+
+<script setup lang="ts">
+import { computed, ref } from 'vue'
+import { EmptyState, LoadingState } from '@/components/common'
+import { TableCard } from '@/components/ui'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow
+} from '@/components/ui'
+import { formatCurrency, formatTokens } from '@/utils/format'
+import type { LeaderboardItem } from '@/api/admin'
+
+interface Props {
+  title: string
+  items: LeaderboardItem[]
+  metric: 'requests' | 'tokens' | 'cost'
+  loading?: boolean
+  showMetricSelect?: boolean
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  loading: false,
+  showMetricSelect: true
+})
+
+const emit = defineEmits<{
+  (e: 'update:metric', value: 'requests' | 'tokens' | 'cost'): void
+}>()
+
+const metric = computed(() => props.metric)
+const metricSelectOpen = ref(false)
+
+function emitMetric(value: string) {
+  if (value === 'requests' || value === 'tokens' || value === 'cost') {
+    emit('update:metric', value)
+  }
+}
+</script>
--- a/frontend/src/components/stats/PercentileChart.vue
+++ b/frontend/src/components/stats/PercentileChart.vue
@@ -0,0 +1,84 @@
+<template>
+  <div class="space-y-3">
+    <div class="flex items-center justify-between">
+      <h3 class="text-sm font-semibold">{{ title }}</h3>
+      <span class="text-xs text-muted-foreground" v-if="subtitle">{{ subtitle }}</span>
+    </div>
+    <div v-if="loading" class="p-6">
+      <LoadingState />
+    </div>
+    <div v-else class="h-[260px]">
+      <LineChart :data="chartData" :options="chartOptions" />
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import LineChart from '@/components/charts/LineChart.vue'
+import { LoadingState } from '@/components/common'
+import type { PercentileItem } from '@/api/admin'
+
+interface Props {
+  title: string
+  subtitle?: string
+  series: PercentileItem[]
+  mode: 'response' | 'ttfb'
+  loading?: boolean
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  loading: false
+})
+
+const labels = computed(() => props.series.map(item => item.date))
+
+// 毫秒转秒
+function msToSeconds(ms: number | null | undefined): number | null {
+  if (ms == null) return null
+  return ms / 1000
+}
+
+const chartData = computed(() => {
+  const p50Key = props.mode === 'response' ? 'p50_response_time_ms' : 'p50_first_byte_time_ms'
+  const p90Key = props.mode === 'response' ? 'p90_response_time_ms' : 'p90_first_byte_time_ms'
+  const p99Key = props.mode === 'response' ? 'p99_response_time_ms' : 'p99_first_byte_time_ms'
+
+  return {
+    labels: labels.value,
+    datasets: [
+      {
+        label: 'P50',
+        data: props.series.map(item => msToSeconds(item[p50Key])),
+        borderColor: 'rgb(59, 130, 246)',
+        tension: 0.25,
+        pointRadius: 2
+      },
+      {
+        label: 'P90',
+        data: props.series.map(item => msToSeconds(item[p90Key])),
+        borderColor: 'rgb(234, 179, 8)',
+        tension: 0.25,
+        pointRadius: 2
+      },
+      {
+        label: 'P99',
+        data: props.series.map(item => msToSeconds(item[p99Key])),
+        borderColor: 'rgb(239, 68, 68)',
+        tension: 0.25,
+        pointRadius: 2
+      }
+    ]
+  }
+})
+
+const chartOptions = computed(() => ({
+  scales: {
+    y: {
+      ticks: {
+        callback: (value: number) => `${value}s`
+      }
+    }
+  }
+}))
+</script>
--- a/frontend/src/components/stats/QuotaProgressCard.vue
+++ b/frontend/src/components/stats/QuotaProgressCard.vue
@@ -0,0 +1,59 @@
+<template>
+  <Card class="p-4 space-y-4">
+    <div class="flex items-center justify-between">
+      <h3 class="text-sm font-semibold">{{ title }}</h3>
+      <span class="text-xs text-muted-foreground" v-if="subtitle">{{ subtitle }}</span>
+    </div>
+
+    <div v-if="loading" class="p-4">
+      <LoadingState />
+    </div>
+    <div v-else-if="providers.length === 0" class="p-4">
+      <EmptyState title="暂无数据" description="暂无月卡配额数据" />
+    </div>
+    <div v-else class="space-y-4">
+      <div v-for="provider in providers" :key="provider.id" class="space-y-2">
+        <div class="flex items-center justify-between text-xs">
+          <span class="font-medium">{{ provider.name }}</span>
+          <span class="text-muted-foreground">
+            {{ formatCurrency(provider.used_usd) }} / {{ formatCurrency(provider.quota_usd) }}
+          </span>
+        </div>
+        <div class="h-2 rounded-full bg-muted">
+          <div
+            class="h-2 rounded-full bg-primary"
+            :style="{ width: `${Math.min(provider.usage_percent, 100)}%` }"
+          />
+        </div>
+        <div class="flex items-center justify-between text-[11px] text-muted-foreground">
+          <span>剩余 {{ formatCurrency(provider.remaining_usd) }}</span>
+          <span v-if="provider.estimated_exhaust_at">
+            预计耗尽 {{ formatDate(provider.estimated_exhaust_at) }}
+          </span>
+        </div>
+      </div>
+    </div>
+  </Card>
+</template>
+
+<script setup lang="ts">
+import { Card } from '@/components/ui'
+import { EmptyState, LoadingState } from '@/components/common'
+import { formatCurrency } from '@/utils/format'
+import type { QuotaUsageProvider } from '@/api/admin'
+
+interface Props {
+  title: string
+  subtitle?: string
+  providers: QuotaUsageProvider[]
+  loading?: boolean
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  loading: false
+})
+
+function formatDate(value: string) {
+  return new Date(value).toLocaleDateString()
+}
+</script>
--- a/frontend/src/components/stats/index.ts
+++ b/frontend/src/components/stats/index.ts
@@ -0,0 +1,7 @@
+export { default as ActivityHeatmap } from './ActivityHeatmap.vue'
+export { default as LeaderboardTable } from './LeaderboardTable.vue'
+export { default as CostForecastChart } from './CostForecastChart.vue'
+export { default as QuotaProgressCard } from './QuotaProgressCard.vue'
+export { default as PercentileChart } from './PercentileChart.vue'
+export { default as ErrorDistributionChart } from './ErrorDistributionChart.vue'
+export { default as ComparisonCard } from './ComparisonCard.vue'
--- a/frontend/src/features/providers/components/EndpointFormDialog.vue
+++ b/frontend/src/features/providers/components/EndpointFormDialog.vue
@@ -37,17 +37,20 @@
              </div>
              <div class="flex items-center gap-1.5">
                <!-- 格式转换按钮 -->
-                <Button
-                  variant="ghost"
-                  size="icon"
-                  class="h-7 w-7 mr-1"
-                  :class="endpoint.format_acceptance_config?.enabled ? 'text-primary' : ''"
-                  :title="endpoint.format_acceptance_config?.enabled ? '已启用格式转换（点击关闭）' : '启用格式转换'"
-                  :disabled="togglingFormatEndpointId === endpoint.id"
-                  @click="handleToggleFormatConversion(endpoint)"
+                <span
+                  class="mr-1"
+                  :title="isEndpointFormatConversionDisabled ? formatConversionDisabledTooltip : (endpoint.format_acceptance_config?.enabled ? '已启用格式转换（点击关闭）' : '启用格式转换')"
                >
-                  <Shuffle class="w-3.5 h-3.5" />
-                </Button>
+                  <Button
+                    variant="ghost"
+                    size="icon"
+                    :class="`h-7 w-7 ${endpoint.format_acceptance_config?.enabled ? 'text-primary' : ''} ${isEndpointFormatConversionDisabled ? 'opacity-50' : ''}`"
+                    :disabled="togglingFormatEndpointId === endpoint.id || isEndpointFormatConversionDisabled"
+                    @click="handleToggleFormatConversion(endpoint)"
+                  >
+                    <Shuffle class="w-3.5 h-3.5" />
+                  </Button>
+                </span>
                <!-- 启用/停用 -->
                <Button
                  variant="ghost"
@@ -63,7 +66,7 @@
                <Button
                  variant="ghost"
                  size="icon"
-                  class="h-7 w-7 text-destructive hover:text-destructive"
+                  class="h-7 w-7 hover:text-destructive"
                  title="删除"
                  :disabled="deletingEndpointId === endpoint.id"
                  @click="handleDeleteEndpoint(endpoint)"
@@ -369,55 +372,62 @@
      <!-- 添加新端点 -->
      <div
        v-if="availableFormats.length > 0"
-        class="rounded-lg border border-dashed p-3"
+        class="rounded-lg border border-dashed"
      >
-        <div class="flex items-end gap-3">
-          <div class="w-32 shrink-0 space-y-1">
-            <Label class="text-xs text-muted-foreground">API 格式</Label>
-            <Select
-              v-model="newEndpoint.api_format"
-              :open="formatSelectOpen"
-              @update:open="handleFormatSelectOpen"
-            >
-              <SelectTrigger class="h-8">
-                <SelectValue placeholder="选择格式" />
-              </SelectTrigger>
-              <SelectContent>
-                <SelectItem
-                  v-for="format in availableFormats"
-                  :key="format.value"
-                  :value="format.value"
-                >
-                  {{ format.label }}
-                </SelectItem>
-              </SelectContent>
-            </Select>
-          </div>
-          <div class="flex-1 min-w-0 space-y-1">
-            <Label class="text-xs text-muted-foreground">Base URL</Label>
-            <Input
-              v-model="newEndpoint.base_url"
-              size="sm"
-              :placeholder="provider?.website || 'https://api.example.com'"
-            />
-          </div>
-          <div class="w-36 shrink-0 space-y-1">
-            <Label class="text-xs text-muted-foreground">自定义路径</Label>
-            <Input
-              v-model="newEndpoint.custom_path"
-              size="sm"
-              :placeholder="newEndpointDefaultPath || '留空使用默认'"
-            />
-          </div>
+        <!-- 卡片头部：API 格式选择 + 添加按钮 -->
+        <div class="flex items-center justify-between px-4 py-2.5 bg-muted/30 border-b border-dashed">
+          <Select
+            v-model="newEndpoint.api_format"
+            :open="formatSelectOpen"
+            @update:open="handleFormatSelectOpen"
+          >
+            <SelectTrigger class="h-auto w-auto gap-1.5 !border-0 bg-transparent !shadow-none p-0 font-medium rounded-none flex-row-reverse !ring-0 !ring-offset-0 !outline-none [&>svg]:h-4 [&>svg]:w-4 [&>svg]:opacity-70">
+              <SelectValue placeholder="选择格式..." />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem
+                v-for="format in availableFormats"
+                :key="format.value"
+                :value="format.value"
+              >
+                {{ format.label }}
+              </SelectItem>
+            </SelectContent>
+          </Select>
          <Button
-            size="sm"
-            class="shrink-0 h-8"
+            variant="ghost"
+            size="icon"
+            class="h-7 w-7 text-primary hover:text-primary"
+            title="添加"
            :disabled="!newEndpoint.api_format || (!newEndpoint.base_url?.trim() && !provider?.website?.trim()) || addingEndpoint"
            @click="handleAddEndpoint"
          >
-            {{ addingEndpoint ? '添加中...' : '添加' }}
+            <Plus class="w-3.5 h-3.5" />
          </Button>
        </div>
+        <!-- 卡片内容：URL 配置 -->
+        <div class="p-4">
+          <div class="flex items-end gap-3">
+            <div class="flex-1 min-w-0 grid grid-cols-3 gap-3">
+              <div class="col-span-2 space-y-1.5">
+                <Label class="text-xs text-muted-foreground">Base URL</Label>
+                <Input
+                  v-model="newEndpoint.base_url"
+                  size="sm"
+                  :placeholder="provider?.website || 'https://api.example.com'"
+                />
+              </div>
+              <div class="space-y-1.5">
+                <Label class="text-xs text-muted-foreground">自定义路径</Label>
+                <Input
+                  v-model="newEndpoint.custom_path"
+                  size="sm"
+                  :placeholder="newEndpointDefaultPath || '留空使用默认'"
+                />
+              </div>
+            </div>
+          </div>
+        </div>
      </div>

      <!-- 空状态 -->
@@ -516,8 +526,26 @@ const props = defineProps<{
  modelValue: boolean
  provider: ProviderWithEndpointsSummary | null
  endpoints?: ProviderEndpoint[]
+  systemFormatConversionEnabled?: boolean
+  providerFormatConversionEnabled?: boolean
 }>()

+// 计算端点级格式转换是否应该被禁用
+const isEndpointFormatConversionDisabled = computed(() => {
+  return props.systemFormatConversionEnabled || props.providerFormatConversionEnabled
+})
+
+// 获取禁用提示
+const formatConversionDisabledTooltip = computed(() => {
+  if (props.systemFormatConversionEnabled) {
+    return '请先关闭系统级开关'
+  }
+  if (props.providerFormatConversionEnabled) {
+    return '请先关闭提供商级开关'
+  }
+  return ''
+})
+
 const emit = defineEmits<{
  'update:modelValue': [value: boolean]
  'endpointCreated': []
--- a/frontend/src/features/providers/components/ModelAliasDialog.vue
+++ b/frontend/src/features/providers/components/ModelAliasDialog.vue
@@ -104,7 +104,7 @@
              type="button"
              variant="ghost"
              size="icon"
-              class="shrink-0 text-destructive hover:text-destructive h-8 w-8"
+              class="shrink-0 hover:text-destructive h-8 w-8"
              @click="removeAlias(index)"
            >
              <X class="w-4 h-4" />
--- a/frontend/src/features/providers/components/ProviderDetailDrawer.vue
+++ b/frontend/src/features/providers/components/ProviderDetailDrawer.vue
@@ -55,15 +55,17 @@
                  </div>
                </div>
                <div class="flex items-center gap-1 shrink-0">
-                  <Button
-                    variant="ghost"
-                    size="icon"
-                    :title="provider.enable_format_conversion ? '已启用格式转换（点击关闭）' : '启用格式转换'"
-                    :class="provider.enable_format_conversion ? 'text-primary' : ''"
-                    @click="toggleFormatConversion"
-                  >
-                    <Shuffle class="w-4 h-4" />
-                  </Button>
+                  <span :title="systemFormatConversionEnabled ? '请先关闭系统级开关' : (provider.enable_format_conversion ? '已启用格式转换（点击关闭）' : '启用格式转换')">
+                    <Button
+                      variant="ghost"
+                      size="icon"
+                      :class="`${provider.enable_format_conversion ? 'text-primary' : ''} ${systemFormatConversionEnabled ? 'opacity-50' : ''}`"
+                      :disabled="systemFormatConversionEnabled"
+                      @click="toggleFormatConversion"
+                    >
+                      <Shuffle class="w-4 h-4" />
+                    </Button>
+                  </span>
                  <Button
                    variant="ghost"
                    size="icon"
@@ -437,6 +439,8 @@
    v-model="endpointDialogOpen"
    :provider="provider"
    :endpoints="endpoints"
+    :system-format-conversion-enabled="systemFormatConversionEnabled"
+    :provider-format-conversion-enabled="provider.enable_format_conversion"
    @endpoint-created="handleEndpointChanged"
    @endpoint-updated="handleEndpointChanged"
  />
@@ -522,6 +526,7 @@ import { useToast } from '@/composables/useToast'
 import { useClipboard } from '@/composables/useClipboard'
 import { useCountdownTimer, formatCountdown } from '@/composables/useCountdownTimer'
 import { getProvider, getProviderEndpoints, updateProvider } from '@/api/endpoints'
+import { adminApi } from '@/api/admin'
 import {
  KeyFormDialog,
  KeyAllowedModelsEditDialog,
@@ -575,6 +580,9 @@ const provider = ref<any>(null)
 const endpoints = ref<ProviderEndpointWithKeys[]>([])
 const providerKeys = ref<EndpointAPIKey[]>([])  // Provider 级别的 keys

+// 系统级格式转换配置
+const systemFormatConversionEnabled = ref(false)
+
 // 端点相关状态
 const endpointDialogOpen = ref(false)

@@ -1256,13 +1264,29 @@ function getFormatProbeCountdown(key: EndpointAPIKey, format: string): string {
  return ''
 }

+// 加载系统级格式转换配置
+async function loadSystemFormatConversionConfig() {
+  try {
+    const result = await adminApi.getSystemConfig('enable_format_conversion')
+    systemFormatConversionEnabled.value = result.value === true
+  } catch {
+    // 获取失败时默认为关闭
+    systemFormatConversionEnabled.value = false
+  }
+}
+
 // 加载 Provider 信息
 async function loadProvider() {
  if (!props.providerId) return

  try {
    loading.value = true
-    provider.value = await getProvider(props.providerId)
+    // 并行加载 Provider 信息和系统级格式转换配置
+    const [providerData] = await Promise.all([
+      getProvider(props.providerId),
+      loadSystemFormatConversionConfig(),
+    ])
+    provider.value = providerData

    if (!provider.value) {
      throw new Error('Provider 不存在')
--- a/frontend/src/features/providers/components/provider-tabs/ModelAliasesTab.vue
+++ b/frontend/src/features/providers/components/provider-tabs/ModelAliasesTab.vue
@@ -92,7 +92,7 @@
            <Button
              variant="ghost"
              size="icon"
-              class="h-8 w-8 text-destructive hover:text-destructive"
+              class="h-8 w-8 hover:text-destructive"
              title="删除映射组"
              @click="deleteGroup(group)"
            >
--- a/frontend/src/features/providers/components/provider-tabs/ModelMappingTab.vue
+++ b/frontend/src/features/providers/components/provider-tabs/ModelMappingTab.vue
@@ -123,7 +123,7 @@
            <Button
              variant="ghost"
              size="icon"
-              class="h-8 w-8 text-destructive hover:text-destructive"
+              class="h-8 w-8 hover:text-destructive"
              title="删除映射"
              @click="deleteGroup(item.group!)"
            >
--- a/frontend/src/features/usage/components/UsageRecordsTable.vue
+++ b/frontend/src/features/usage/components/UsageRecordsTable.vue
@@ -1,33 +1,11 @@
 <template>
  <TableCard title="使用记录">
    <template #actions>
-      <!-- 时间段筛选 -->
-      <Select
-        v-model:open="periodSelectOpen"
-        :model-value="selectedPeriod"
-        @update:model-value="$emit('update:selectedPeriod', $event)"
-      >
-        <SelectTrigger class="w-24 sm:w-32 h-8 text-xs border-border/60">
-          <SelectValue placeholder="选择时间段" />
-        </SelectTrigger>
-        <SelectContent>
-          <SelectItem value="today">
-            今天
-          </SelectItem>
-          <SelectItem value="yesterday">
-            昨天
-          </SelectItem>
-          <SelectItem value="last7days">
-            最近7天
-          </SelectItem>
-          <SelectItem value="last30days">
-            最近30天
-          </SelectItem>
-          <SelectItem value="last90days">
-            最近90天
-          </SelectItem>
-        </SelectContent>
-      </Select>
+      <!-- 时间范围筛选 -->
+      <TimeRangePicker
+        v-model="timeRangeModel"
+        :show-granularity="false"
+      />

      <!-- 分隔线 -->
      <div class="hidden sm:block h-4 w-px bg-border" />
@@ -114,6 +92,29 @@
        </SelectContent>
      </Select>

+      <!-- API格式筛选 -->
+      <Select
+        v-model:open="filterApiFormatSelectOpen"
+        :model-value="filterApiFormat"
+        @update:model-value="$emit('update:filterApiFormat', $event)"
+      >
+        <SelectTrigger class="w-24 sm:w-32 h-8 text-xs border-border/60">
+          <SelectValue placeholder="全部格式" />
+        </SelectTrigger>
+        <SelectContent>
+          <SelectItem value="__all__">
+            全部格式
+          </SelectItem>
+          <SelectItem
+            v-for="format in availableApiFormats"
+            :key="format.value"
+            :value="format.value"
+          >
+            {{ format.label }}
+          </SelectItem>
+        </SelectContent>
+      </Select>
+
      <!-- 状态筛选 -->
      <Select
        v-model:open="filterStatusSelectOpen"
@@ -127,20 +128,23 @@
          <SelectItem value="__all__">
            全部状态
          </SelectItem>
-          <SelectItem value="active">
-            进行中
+          <SelectItem value="stream">
+            流式
+          </SelectItem>
+          <SelectItem value="standard">
+            标准
          </SelectItem>
          <SelectItem value="pending">
            等待中
          </SelectItem>
          <SelectItem value="streaming">
-            流式传输
+            传输中
          </SelectItem>
          <SelectItem value="completed">
-            已完成
+            完成
          </SelectItem>
          <SelectItem value="failed">
-            已失败
+            失败
          </SelectItem>
        </SelectContent>
      </Select>
@@ -520,7 +524,8 @@
 </template>

 <script setup lang="ts">
-import { ref, computed, onUnmounted, watch } from 'vue'
+import { ref, computed, watch } from 'vue'
+import { useDebounceFn, useIntervalFn } from '@vueuse/core'
 import {
  TableCard,
  Badge,
@@ -544,7 +549,8 @@ import { formatTokens, formatCurrency } from '@/utils/format'
 import { formatDateTime } from '../composables'
 import { useRowClick } from '@/composables/useRowClick'
 import { API_FORMAT_LABELS } from '@/api/endpoints/types'
-import type { UsageRecord } from '../types'
+import type { DateRangeParams, UsageRecord } from '../types'
+import { TimeRangePicker } from '@/components/common'

 export interface UserOption {
  id: string
@@ -557,13 +563,14 @@ const props = defineProps<{
  isAdmin: boolean
  showActualCost: boolean
  loading: boolean
-  // 时间段
-  selectedPeriod: string
+  // 时间范围
+  timeRange: DateRangeParams
  // 筛选
  filterSearch: string
  filterUser: string
  filterModel: string
  filterProvider: string
+  filterApiFormat: string
  filterStatus: string
  availableUsers: UserOption[]
  availableModels: string[]
@@ -578,11 +585,12 @@ const props = defineProps<{
 }>()

 const emit = defineEmits<{
-  'update:selectedPeriod': [value: string]
+  'update:timeRange': [value: DateRangeParams]
  'update:filterSearch': [value: string]
  'update:filterUser': [value: string]
  'update:filterModel': [value: string]
  'update:filterProvider': [value: string]
+  'update:filterApiFormat': [value: string]
  'update:filterStatus': [value: string]
  'update:currentPage': [value: number]
  'update:pageSize': [value: number]
@@ -591,16 +599,38 @@ const emit = defineEmits<{
  'showDetail': [id: string]
 }>()

+// 静态常量（放在 defineProps/defineEmits 之后）
+const AVAILABLE_API_FORMATS = [
+  { value: 'openai:chat', label: 'OpenAI Chat' },
+  { value: 'openai:cli', label: 'OpenAI CLI' },
+  { value: 'openai:video', label: 'OpenAI Video' },
+  { value: 'claude:chat', label: 'Claude Chat' },
+  { value: 'claude:cli', label: 'Claude CLI' },
+  { value: 'gemini:chat', label: 'Gemini Chat' },
+  { value: 'gemini:cli', label: 'Gemini CLI' },
+  { value: 'gemini:video', label: 'Gemini Video' },
+] as const
+
 // Select 打开状态
-const periodSelectOpen = ref(false)
 const filterUserSelectOpen = ref(false)
 const filterModelSelectOpen = ref(false)
 const filterProviderSelectOpen = ref(false)
+const filterApiFormatSelectOpen = ref(false)
 const filterStatusSelectOpen = ref(false)

+// 使用模块级常量
+const availableApiFormats = AVAILABLE_API_FORMATS
+
+const timeRangeModel = computed({
+  get: () => props.timeRange,
+  set: (value: DateRangeParams) => emit('update:timeRange', value)
+})
+
 // 通用搜索（输入防抖）
 const localSearch = ref(props.filterSearch)
-let searchDebounceTimer: ReturnType<typeof setTimeout> | null = null
+const emitSearchDebounced = useDebounceFn((value: string) => {
+  emit('update:filterSearch', value)
+}, 300)

 watch(() => props.filterSearch, (value) => {
  if (value !== localSearch.value) {
@@ -609,36 +639,23 @@ watch(() => props.filterSearch, (value) => {
 })

 watch(localSearch, (value) => {
-  if (searchDebounceTimer) clearTimeout(searchDebounceTimer)
-  searchDebounceTimer = setTimeout(() => {
-    emit('update:filterSearch', value)
-  }, 300)
+  emitSearchDebounced(value)
 })

 // 动态计时器相关
 const now = ref(Date.now())
-let timerInterval: ReturnType<typeof setInterval> | null = null

 // 检查是否有活跃请求
 const hasActiveRecords = computed(() => {
  return props.records.some(r => r.status === 'pending' || r.status === 'streaming')
 })

-// 启动计时器
-function startTimer() {
-  if (timerInterval) return
-  timerInterval = setInterval(() => {
-    now.value = Date.now()
-  }, 100) // 每 100ms 更新一次
-}
-
-// 停止计时器
-function stopTimer() {
-  if (timerInterval) {
-    clearInterval(timerInterval)
-    timerInterval = null
-  }
-}
+// 使用 VueUse 的 useIntervalFn 管理计时器（自动清理）
+const { pause: stopTimer, resume: startTimer } = useIntervalFn(
+  () => { now.value = Date.now() },
+  100,
+  { immediate: false }
+)

 // 计算活跃请求的实时耗时
 function getElapsedTime(record: UsageRecord): string {
@@ -679,14 +696,7 @@ function handleRowClick(event: MouseEvent, id: string) {
  emit('showDetail', id)
 }

-// 组件卸载时清理
-onUnmounted(() => {
-  stopTimer()
-  if (searchDebounceTimer) {
-    clearTimeout(searchDebounceTimer)
-    searchDebounceTimer = null
-  }
-})
+// useIntervalFn 和 useDebounceFn 自动处理清理，无需 onUnmounted

 // 格式化 API 格式显示名称
 function formatApiFormat(format: string): string {
--- a/frontend/src/features/usage/composables/useDateRange.ts
+++ b/frontend/src/features/usage/composables/useDateRange.ts
@@ -4,7 +4,16 @@ import type { PeriodValue, DateRangeParams } from '../types'
 * 格式化日期为 ISO 格式（不带毫秒，兼容 FastAPI datetime 解析）
 */
 function formatDateForApi(date: Date): string {
-  return date.toISOString().replace(/\.\d{3}Z$/, 'Z')
+  const year = date.getFullYear()
+  const month = String(date.getMonth() + 1).padStart(2, '0')
+  const day = String(date.getDate()).padStart(2, '0')
+  return `${year}-${month}-${day}`
+}
+
+function getTimezoneParams() {
+  const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone
+  const tz_offset_minutes = -new Date().getTimezoneOffset()
+  return { timezone, tz_offset_minutes }
 }

 /**
@@ -38,7 +47,9 @@ export function getDateRangeFromPeriod(period: PeriodValue): DateRangeParams {

  return {
    start_date: formatDateForApi(startDate),
-    end_date: formatDateForApi(endDate)
+    end_date: formatDateForApi(endDate),
+    preset: period,
+    ...getTimezoneParams()
  }
 }

--- a/frontend/src/features/usage/composables/useUsageData.ts
+++ b/frontend/src/features/usage/composables/useUsageData.ts
@@ -27,6 +27,7 @@ export interface FilterParams {
  user_id?: string
  model?: string
  provider?: string
+  api_format?: string
  status?: string
 }

@@ -263,6 +264,9 @@ export function useUsageData(options: UseUsageDataOptions) {
        if (filters?.provider) {
          params.provider = filters.provider
        }
+        if (filters?.api_format) {
+          params.api_format = filters.api_format
+        }
        if (filters?.status) {
          params.status = filters.status
        }
--- a/frontend/src/features/usage/types.ts
+++ b/frontend/src/features/usage/types.ts
@@ -100,6 +100,10 @@ export interface UsageRecord {
 export interface DateRangeParams {
  start_date?: string
  end_date?: string
+  preset?: string
+  granularity?: 'hour' | 'day' | 'week' | 'month'
+  timezone?: string
+  tz_offset_minutes?: number
 }

 // 时间段选项
--- a/frontend/src/layouts/MainLayout.vue
+++ b/frontend/src/layouts/MainLayout.vue
@@ -544,6 +544,9 @@ const navigation = computed(() => {
      items: [
        { name: '仪表盘', href: '/admin/dashboard', icon: Home },
        { name: '健康监控', href: '/admin/health-monitor', icon: Activity },
+        { name: '用户统计', href: '/admin/user-stats', icon: BarChart3 },
+        { name: '成本分析', href: '/admin/cost-analysis', icon: Gauge },
+        { name: '性能分析', href: '/admin/performance-analysis', icon: Activity },
      ]
    },
    {
--- a/frontend/src/mocks/handler.ts
+++ b/frontend/src/mocks/handler.ts
@@ -2559,3 +2559,185 @@ mockHandlers['GET /api/admin/usage/cache-affinity/hit-analysis'] = async (config
  const data = generateCacheHitAnalysisData(hours)
  return createMockResponse(data)
 }
+
+// ========== Admin: Stats / Leaderboard ==========
+mockHandlers['GET /api/admin/stats/leaderboard/users'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse({
+    items: [
+      { rank: 1, id: 'user-1', name: 'Demo Admin', value: 1200, requests: 1200, tokens: 240000, cost: 123.4 },
+      { rank: 2, id: 'user-2', name: 'Demo User', value: 980, requests: 980, tokens: 180000, cost: 98.7 }
+    ],
+    total: 2,
+    metric: 'requests',
+    start_date: '2026-02-01',
+    end_date: '2026-02-07'
+  })
+}
+
+mockHandlers['GET /api/admin/stats/leaderboard/api-keys'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse({
+    items: [
+      { rank: 1, id: 'key-1', name: 'Key A', value: 800, requests: 800, tokens: 160000, cost: 76.2 },
+      { rank: 2, id: 'key-2', name: 'Key B', value: 620, requests: 620, tokens: 120000, cost: 55.1 }
+    ],
+    total: 2,
+    metric: 'requests',
+    start_date: '2026-02-01',
+    end_date: '2026-02-07'
+  })
+}
+
+mockHandlers['GET /api/admin/stats/leaderboard/models'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse({
+    items: [
+      { rank: 1, id: 'gpt-4', name: 'gpt-4', value: 500, requests: 500, tokens: 100000, cost: 44.2 },
+      { rank: 2, id: 'claude-3', name: 'claude-3', value: 420, requests: 420, tokens: 90000, cost: 40.1 }
+    ],
+    total: 2,
+    metric: 'requests',
+    start_date: '2026-02-01',
+    end_date: '2026-02-07'
+  })
+}
+
+mockHandlers['GET /api/admin/stats/cost/forecast'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse({
+    history: [
+      { date: '2026-02-01', total_cost: 120 },
+      { date: '2026-02-02', total_cost: 132 },
+      { date: '2026-02-03', total_cost: 140 }
+    ],
+    forecast: [
+      { date: '2026-02-04', total_cost: 150 },
+      { date: '2026-02-05', total_cost: 158 }
+    ],
+    slope: 5.2,
+    intercept: 110.5,
+    start_date: '2026-02-01',
+    end_date: '2026-02-03'
+  })
+}
+
+mockHandlers['GET /api/admin/stats/cost/savings'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse({
+    cache_read_tokens: 120000,
+    cache_read_cost: 8.2,
+    cache_creation_cost: 3.4,
+    estimated_full_cost: 82.0,
+    cache_savings: 73.8
+  })
+}
+
+mockHandlers['GET /api/admin/stats/providers/quota-usage'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse({
+    providers: [
+      {
+        id: 'prov-1',
+        name: 'Provider A',
+        quota_usd: 500,
+        used_usd: 320,
+        remaining_usd: 180,
+        usage_percent: 64,
+        quota_expires_at: null,
+        estimated_exhaust_at: new Date(Date.now() + 7 * 24 * 3600 * 1000).toISOString()
+      }
+    ]
+  })
+}
+
+mockHandlers['GET /api/admin/stats/performance/percentiles'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse([
+    {
+      date: '2026-02-01',
+      p50_response_time_ms: 320,
+      p90_response_time_ms: 560,
+      p99_response_time_ms: 860,
+      p50_first_byte_time_ms: 120,
+      p90_first_byte_time_ms: 210,
+      p99_first_byte_time_ms: 400
+    },
+    {
+      date: '2026-02-02',
+      p50_response_time_ms: 300,
+      p90_response_time_ms: 540,
+      p99_response_time_ms: 820,
+      p50_first_byte_time_ms: 110,
+      p90_first_byte_time_ms: 200,
+      p99_first_byte_time_ms: 380
+    }
+  ])
+}
+
+mockHandlers['GET /api/admin/stats/errors/distribution'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse({
+    distribution: [
+      { category: 'rate_limit', count: 24 },
+      { category: 'server_error', count: 12 },
+      { category: 'timeout', count: 6 }
+    ],
+    trend: [
+      { date: '2026-02-01', total: 8, categories: { rate_limit: 5, server_error: 3 } },
+      { date: '2026-02-02', total: 6, categories: { rate_limit: 4, timeout: 2 } }
+    ]
+  })
+}
+
+mockHandlers['GET /api/admin/stats/comparison'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse({
+    current: {
+      total_requests: 1200,
+      total_tokens: 320000,
+      total_cost: 180,
+      actual_total_cost: 190,
+      avg_response_time_ms: 350,
+      error_requests: 42
+    },
+    comparison: {
+      total_requests: 900,
+      total_tokens: 260000,
+      total_cost: 150,
+      actual_total_cost: 160,
+      avg_response_time_ms: 370,
+      error_requests: 38
+    },
+    change_percent: {
+      total_requests: 33.3,
+      total_tokens: 23.1,
+      total_cost: 20.0,
+      actual_total_cost: 18.8,
+      avg_response_time_ms: -5.4,
+      error_requests: 10.5
+    },
+    current_start: '2026-02-01',
+    current_end: '2026-02-07',
+    comparison_start: '2026-01-25',
+    comparison_end: '2026-01-31'
+  })
+}
+
+mockHandlers['GET /api/admin/stats/time-series'] = async () => {
+  await delay()
+  requireAdmin()
+  return createMockResponse([
+    { date: '2026-02-01', total_requests: 120, input_tokens: 20000, output_tokens: 30000, total_cost: 12.3 },
+    { date: '2026-02-02', total_requests: 140, input_tokens: 22000, output_tokens: 32000, total_cost: 13.8 }
+  ])
+}
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -161,6 +161,21 @@ const routes: RouteRecordRaw[] = [
        name: 'Usage',
        component: () => importWithRetry(() => import('@/views/shared/Usage.vue'))
      },
+      {
+        path: 'user-stats',
+        name: 'UserStats',
+        component: () => importWithRetry(() => import('@/views/admin/UserStats.vue'))
+      },
+      {
+        path: 'cost-analysis',
+        name: 'CostAnalysis',
+        component: () => importWithRetry(() => import('@/views/admin/CostAnalysis.vue'))
+      },
+      {
+        path: 'performance-analysis',
+        name: 'PerformanceAnalysis',
+        component: () => importWithRetry(() => import('@/views/admin/PerformanceAnalysis.vue'))
+      },
      {
        path: 'system',
        name: 'SystemSettings',
--- a/frontend/src/views/admin/ApiKeys.vue
+++ b/frontend/src/views/admin/ApiKeys.vue
@@ -20,13 +20,6 @@
              <h3 class="text-sm sm:text-base font-semibold">
                独立余额 API Keys
              </h3>
-              <p class="text-xs text-muted-foreground mt-0.5">
-                活跃 {{ activeKeyCount }} · 禁用 {{ inactiveKeyCount }} · 无限 Key {{ unlimitedKeyCount }}
-                <span
-                  v-if="expiringSoonCount > 0"
-                  class="text-amber-600"
-                > · 即将到期 {{ expiringSoonCount }}</span>
-              </p>
            </div>
            <div class="flex flex-wrap items-center gap-2">
              <!-- 搜索框 -->
--- a/frontend/src/views/admin/AsyncTasks.vue
+++ b/frontend/src/views/admin/AsyncTasks.vue
@@ -56,7 +56,7 @@
          <h3 class="text-base font-semibold">异步任务</h3>
          <div class="flex items-center gap-2">
            <!-- 状态筛选 -->
-            <Select v-model="filterStatus">
+            <Select v-model:open="statusSelectOpen" v-model="filterStatus">
              <SelectTrigger class="w-28 h-8 text-xs border-border/60">
                <SelectValue placeholder="状态" />
              </SelectTrigger>
@@ -690,6 +690,7 @@ const total = ref(0)
 const currentPage = ref(1)
 const pageSize = ref(20)
 const filterStatus = ref('all')
+const statusSelectOpen = ref(false)
 const filterModel = ref('')
 const showDetail = ref(false)
 const selectedTask = ref<AsyncTaskDetail | null>(null)
--- a/frontend/src/views/admin/CostAnalysis.vue
+++ b/frontend/src/views/admin/CostAnalysis.vue
@@ -0,0 +1,129 @@
+<template>
+  <div class="space-y-6 px-4 sm:px-6 lg:px-0">
+    <div class="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
+      <div>
+        <h1 class="text-lg font-semibold">成本分析</h1>
+        <p class="text-xs text-muted-foreground">成本趋势、预测与节省统计</p>
+      </div>
+      <TimeRangePicker v-model="timeRange" />
+    </div>
+
+    <div class="grid grid-cols-1 lg:grid-cols-3 gap-4">
+      <Card class="p-4 space-y-2">
+        <div class="text-xs text-muted-foreground">缓存节省</div>
+        <div class="text-lg font-semibold">{{ formatCurrency(costSavings?.cache_savings ?? 0) }}</div>
+        <div class="text-xs text-muted-foreground">
+          读取成本 {{ formatCurrency(costSavings?.cache_read_cost ?? 0) }}
+        </div>
+      </Card>
+      <Card class="p-4 space-y-2">
+        <div class="text-xs text-muted-foreground">缓存读取 Tokens</div>
+        <div class="text-lg font-semibold">{{ formatTokens(costSavings?.cache_read_tokens ?? 0) }}</div>
+        <div class="text-xs text-muted-foreground">
+          预计全额成本 {{ formatCurrency(costSavings?.estimated_full_cost ?? 0) }}
+        </div>
+      </Card>
+      <Card class="p-4 space-y-2">
+        <div class="text-xs text-muted-foreground">缓存创建成本</div>
+        <div class="text-lg font-semibold">{{ formatCurrency(costSavings?.cache_creation_cost ?? 0) }}</div>
+        <div class="text-xs text-muted-foreground">基于当前时间范围</div>
+      </Card>
+    </div>
+
+    <div class="grid grid-cols-1 lg:grid-cols-2 gap-4">
+      <Card class="p-4">
+        <CostForecastChart
+          title="成本趋势预测"
+          :history="forecastHistory"
+          :forecast="forecastFuture"
+          :loading="forecastLoading"
+        />
+      </Card>
+      <QuotaProgressCard
+        title="月卡消耗进度"
+        :providers="quotaProviders"
+        :loading="quotaLoading"
+      />
+    </div>
+
+    <UsageProviderTable
+      :data="providerStats"
+      :is-admin="true"
+    />
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted, watch } from 'vue'
+import Card from '@/components/ui/card.vue'
+import { TimeRangePicker } from '@/components/common'
+import { CostForecastChart, QuotaProgressCard } from '@/components/stats'
+import { UsageProviderTable } from '@/features/usage/components'
+import { adminApi, type CostForecastResponse, type CostSavingsResponse, type QuotaUsageProvider } from '@/api/admin'
+import { usageApi } from '@/api/usage'
+import { formatCurrency, formatTokens } from '@/utils/format'
+import { getDateRangeFromPeriod } from '@/features/usage/composables'
+import type { DateRangeParams } from '@/features/usage/types'
+import type { ProviderStatsItem } from '@/features/usage/types'
+
+const timeRange = ref<DateRangeParams>(getDateRangeFromPeriod('last30days'))
+
+const forecast = ref<CostForecastResponse | null>(null)
+const costSavings = ref<CostSavingsResponse | null>(null)
+const quotaProviders = ref<QuotaUsageProvider[]>([])
+const providerStats = ref<ProviderStatsItem[]>([])
+
+const forecastLoading = ref(false)
+const quotaLoading = ref(false)
+
+const forecastHistory = computed(() => forecast.value?.history || [])
+const forecastFuture = computed(() => forecast.value?.forecast || [])
+
+function buildTimeRangeParams() {
+  return {
+    start_date: timeRange.value.start_date,
+    end_date: timeRange.value.end_date,
+    preset: timeRange.value.preset,
+    timezone: timeRange.value.timezone,
+    tz_offset_minutes: timeRange.value.tz_offset_minutes
+  }
+}
+
+async function loadForecast() {
+  forecastLoading.value = true
+  try {
+    forecast.value = await adminApi.getCostForecast(buildTimeRangeParams())
+  } finally {
+    forecastLoading.value = false
+  }
+}
+
+async function loadSavings() {
+  costSavings.value = await adminApi.getCostSavings(buildTimeRangeParams())
+}
+
+async function loadQuotaUsage() {
+  quotaLoading.value = true
+  try {
+    const response = await adminApi.getQuotaUsage()
+    quotaProviders.value = response.providers
+  } finally {
+    quotaLoading.value = false
+  }
+}
+
+async function loadProviderStats() {
+  providerStats.value = await usageApi.getUsageByProvider({
+    ...buildTimeRangeParams(),
+    limit: 8
+  })
+}
+
+async function loadAll() {
+  await Promise.all([loadForecast(), loadSavings(), loadQuotaUsage(), loadProviderStats()])
+}
+
+watch(timeRange, loadAll, { deep: true })
+
+onMounted(loadAll)
+</script>
--- a/frontend/src/views/admin/PerformanceAnalysis.vue
+++ b/frontend/src/views/admin/PerformanceAnalysis.vue
@@ -0,0 +1,155 @@
+<template>
+  <div class="space-y-6 px-4 sm:px-6 lg:px-0">
+    <div class="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
+      <div>
+        <h1 class="text-lg font-semibold">性能分析</h1>
+        <p class="text-xs text-muted-foreground">延迟分布与错误统计</p>
+      </div>
+      <TimeRangePicker v-model="timeRange" />
+    </div>
+
+    <div class="grid grid-cols-1 lg:grid-cols-2 gap-4">
+      <Card class="p-4">
+        <PercentileChart
+          title="响应延迟百分位"
+          :series="percentiles"
+          mode="response"
+          :loading="percentileLoading"
+        />
+      </Card>
+      <Card class="p-4">
+        <PercentileChart
+          title="首字节延迟百分位"
+          :series="percentiles"
+          mode="ttfb"
+          :loading="percentileLoading"
+        />
+      </Card>
+    </div>
+
+    <div class="grid grid-cols-1 lg:grid-cols-2 gap-4">
+      <Card class="p-4">
+        <ErrorDistributionChart
+          title="错误分布"
+          :distribution="errorDistribution"
+          :loading="errorLoading"
+        />
+      </Card>
+      <Card class="p-4 space-y-3">
+        <h3 class="text-sm font-semibold">错误趋势</h3>
+        <div v-if="errorLoading" class="p-6">
+          <LoadingState />
+        </div>
+        <div v-else class="h-[260px]">
+          <LineChart :data="errorTrendChartData" />
+        </div>
+      </Card>
+    </div>
+
+    <Card class="p-4 space-y-3">
+      <h3 class="text-sm font-semibold">提供商健康度</h3>
+      <div v-if="providerLoading" class="p-4">
+        <LoadingState />
+      </div>
+      <div v-else class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-3 text-sm">
+        <div
+          v-for="provider in providerStatus"
+          :key="provider.name"
+          class="p-3 border rounded-lg"
+        >
+          <div class="flex items-center justify-between">
+            <span class="font-medium">{{ provider.name }}</span>
+            <span class="text-xs text-muted-foreground">{{ provider.requests }} 请求</span>
+          </div>
+          <div class="text-xs text-muted-foreground mt-1">
+            状态: {{ provider.status }}
+          </div>
+        </div>
+      </div>
+    </Card>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted, watch } from 'vue'
+import Card from '@/components/ui/card.vue'
+import { LoadingState, TimeRangePicker } from '@/components/common'
+import { ErrorDistributionChart, PercentileChart } from '@/components/stats'
+import LineChart from '@/components/charts/LineChart.vue'
+import { adminApi, type ErrorDistributionResponse, type PercentileItem } from '@/api/admin'
+import { dashboardApi, type ProviderStatus } from '@/api/dashboard'
+import { getDateRangeFromPeriod } from '@/features/usage/composables'
+import type { DateRangeParams } from '@/features/usage/types'
+
+const timeRange = ref<DateRangeParams>(getDateRangeFromPeriod('last30days'))
+
+const percentiles = ref<PercentileItem[]>([])
+const percentileLoading = ref(false)
+
+const errorDistribution = ref<ErrorDistributionResponse['distribution']>([])
+const errorTrend = ref<ErrorDistributionResponse['trend']>([])
+const errorLoading = ref(false)
+
+const providerStatus = ref<ProviderStatus[]>([])
+const providerLoading = ref(false)
+
+function buildTimeRangeParams() {
+  return {
+    start_date: timeRange.value.start_date,
+    end_date: timeRange.value.end_date,
+    preset: timeRange.value.preset,
+    timezone: timeRange.value.timezone,
+    tz_offset_minutes: timeRange.value.tz_offset_minutes
+  }
+}
+
+async function loadPercentiles() {
+  percentileLoading.value = true
+  try {
+    percentiles.value = await adminApi.getPercentiles(buildTimeRangeParams())
+  } finally {
+    percentileLoading.value = false
+  }
+}
+
+async function loadErrors() {
+  errorLoading.value = true
+  try {
+    const response = await adminApi.getErrorDistribution(buildTimeRangeParams())
+    errorDistribution.value = response.distribution
+    errorTrend.value = response.trend
+  } finally {
+    errorLoading.value = false
+  }
+}
+
+async function loadProviders() {
+  providerLoading.value = true
+  try {
+    providerStatus.value = await dashboardApi.getProviderStatus()
+  } finally {
+    providerLoading.value = false
+  }
+}
+
+const errorTrendChartData = computed(() => ({
+  labels: errorTrend.value.map(item => item.date),
+  datasets: [
+    {
+      label: '错误数',
+      data: errorTrend.value.map(item => item.total),
+      borderColor: 'rgb(239, 68, 68)',
+      tension: 0.25,
+      pointRadius: 2
+    }
+  ]
+}))
+
+async function loadAll() {
+  await Promise.all([loadPercentiles(), loadErrors(), loadProviders()])
+}
+
+watch(timeRange, loadAll, { deep: true })
+
+onMounted(loadAll)
+</script>
--- a/frontend/src/views/admin/UserStats.vue
+++ b/frontend/src/views/admin/UserStats.vue
@@ -0,0 +1,239 @@
+<template>
+  <div class="space-y-6 px-4 sm:px-6 lg:px-0">
+    <div class="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
+      <div>
+        <h1 class="text-lg font-semibold">用户统计</h1>
+        <p class="text-xs text-muted-foreground">查看用户排行榜与使用趋势</p>
+      </div>
+      <div class="flex flex-wrap items-center gap-3">
+        <TimeRangePicker v-model="timeRange" :allow-hourly="true" />
+        <Select v-model:open="userSelectOpen" v-model="selectedUserId">
+          <SelectTrigger class="h-8 text-xs w-52">
+            <SelectValue placeholder="选择用户" />
+          </SelectTrigger>
+          <SelectContent>
+            <SelectItem
+              v-for="user in users"
+              :key="user.id"
+              :value="user.id"
+            >
+              {{ user.username || user.email }}
+            </SelectItem>
+          </SelectContent>
+        </Select>
+        <Select v-model:open="compareUserSelectOpen" v-model="compareUserId">
+          <SelectTrigger class="h-8 text-xs w-52">
+            <SelectValue placeholder="对比用户（可选）" />
+          </SelectTrigger>
+          <SelectContent>
+            <SelectItem value="__none__">不对比</SelectItem>
+            <SelectItem
+              v-for="user in users"
+              :key="`compare-${user.id}`"
+              :value="user.id"
+            >
+              {{ user.username || user.email }}
+            </SelectItem>
+          </SelectContent>
+        </Select>
+      </div>
+    </div>
+
+    <div class="grid grid-cols-1 lg:grid-cols-2 gap-4">
+      <LeaderboardTable
+        title="用户排行榜"
+        :items="leaderboard"
+        :metric="metric"
+        :loading="leaderboardLoading"
+        @update:metric="metric = $event"
+      />
+
+      <Card class="p-4 space-y-3">
+        <h3 class="text-sm font-semibold">用户摘要</h3>
+        <div v-if="summaryLoading" class="p-6">
+          <LoadingState />
+        </div>
+        <div v-else class="grid grid-cols-2 gap-3 text-sm">
+          <div>
+            <div class="text-xs text-muted-foreground">请求数</div>
+            <div class="font-semibold">{{ userSummary?.total_requests ?? 0 }}</div>
+          </div>
+          <div>
+            <div class="text-xs text-muted-foreground">Tokens</div>
+            <div class="font-semibold">{{ formatTokens(userSummary?.total_tokens ?? 0) }}</div>
+          </div>
+          <div>
+            <div class="text-xs text-muted-foreground">成本</div>
+            <div class="font-semibold">{{ formatCurrency(userSummary?.total_cost ?? 0) }}</div>
+          </div>
+          <div>
+            <div class="text-xs text-muted-foreground">错误率</div>
+            <div class="font-semibold">{{ userSummary?.error_rate ?? 0 }}%</div>
+          </div>
+        </div>
+      </Card>
+    </div>
+
+    <Card class="p-4 space-y-4">
+      <h3 class="text-sm font-semibold">用户使用趋势</h3>
+      <div v-if="seriesLoading" class="p-6">
+        <LoadingState />
+      </div>
+      <div v-else class="h-[280px]">
+        <LineChart :data="seriesChartData" />
+      </div>
+    </Card>
+
+    <Card v-if="comparisonSeries.length > 0" class="p-4 space-y-4">
+      <h3 class="text-sm font-semibold">用户对比趋势</h3>
+      <div class="h-[280px]">
+        <LineChart :data="comparisonChartData" />
+      </div>
+    </Card>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted, watch } from 'vue'
+import { Card, Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui'
+import LineChart from '@/components/charts/LineChart.vue'
+import { LoadingState, TimeRangePicker } from '@/components/common'
+import { LeaderboardTable } from '@/components/stats'
+import { adminApi, type LeaderboardItem } from '@/api/admin'
+import { usersApi, type User } from '@/api/users'
+import { usageApi } from '@/api/usage'
+import { formatCurrency, formatTokens } from '@/utils/format'
+import { getDateRangeFromPeriod } from '@/features/usage/composables'
+import type { DateRangeParams } from '@/features/usage/types'
+
+const timeRange = ref<DateRangeParams>(getDateRangeFromPeriod('last7days'))
+const metric = ref<'requests' | 'tokens' | 'cost'>('requests')
+
+const users = ref<User[]>([])
+const selectedUserId = ref<string | null>(null)
+const compareUserId = ref<string>('__none__')
+const userSelectOpen = ref(false)
+const compareUserSelectOpen = ref(false)
+
+const leaderboard = ref<LeaderboardItem[]>([])
+const leaderboardLoading = ref(false)
+
+const userSummary = ref<any | null>(null)
+const summaryLoading = ref(false)
+
+const series = ref<any[]>([])
+const comparisonSeries = ref<any[]>([])
+const seriesLoading = ref(false)
+
+function buildTimeRangeParams() {
+  return {
+    start_date: timeRange.value.start_date,
+    end_date: timeRange.value.end_date,
+    preset: timeRange.value.preset,
+    timezone: timeRange.value.timezone,
+    tz_offset_minutes: timeRange.value.tz_offset_minutes,
+    granularity: timeRange.value.granularity || 'day'
+  }
+}
+
+async function loadUsers() {
+  users.value = await usersApi.getAllUsers()
+  if (!selectedUserId.value && users.value.length > 0) {
+    selectedUserId.value = users.value[0].id
+  }
+}
+
+async function loadLeaderboard() {
+  leaderboardLoading.value = true
+  try {
+    const response = await adminApi.getLeaderboardUsers({
+      ...buildTimeRangeParams(),
+      metric: metric.value,
+      limit: 10
+    })
+    leaderboard.value = response.items
+  } finally {
+    leaderboardLoading.value = false
+  }
+}
+
+async function loadSummary() {
+  if (!selectedUserId.value) return
+  summaryLoading.value = true
+  try {
+    userSummary.value = await usageApi.getUsageStats({
+      ...buildTimeRangeParams(),
+      user_id: selectedUserId.value
+    })
+  } finally {
+    summaryLoading.value = false
+  }
+}
+
+async function loadSeries() {
+  if (!selectedUserId.value) return
+  seriesLoading.value = true
+  try {
+    series.value = await adminApi.getTimeSeries({
+      ...buildTimeRangeParams(),
+      user_id: selectedUserId.value
+    })
+
+    comparisonSeries.value = []
+    if (compareUserId.value && compareUserId.value !== '__none__') {
+      comparisonSeries.value = await adminApi.getTimeSeries({
+        ...buildTimeRangeParams(),
+        user_id: compareUserId.value
+      })
+    }
+  } finally {
+    seriesLoading.value = false
+  }
+}
+
+const seriesChartData = computed(() => ({
+  labels: series.value.map(item => item.date),
+  datasets: [
+    {
+      label: '成本',
+      data: series.value.map(item => item.total_cost),
+      borderColor: 'rgb(59, 130, 246)',
+      tension: 0.25,
+      pointRadius: 2
+    }
+  ]
+}))
+
+const comparisonChartData = computed(() => ({
+  labels: series.value.map(item => item.date),
+  datasets: [
+    {
+      label: '当前用户',
+      data: series.value.map(item => item.total_cost),
+      borderColor: 'rgb(59, 130, 246)',
+      tension: 0.25,
+      pointRadius: 2
+    },
+    {
+      label: '对比用户',
+      data: comparisonSeries.value.map(item => item.total_cost),
+      borderColor: 'rgb(234, 179, 8)',
+      tension: 0.25,
+      pointRadius: 2
+    }
+  ]
+}))
+
+watch([timeRange, metric], loadLeaderboard, { deep: true })
+watch([timeRange, selectedUserId, compareUserId], () => {
+  loadSummary()
+  loadSeries()
+}, { deep: true })
+
+onMounted(async () => {
+  await loadUsers()
+  await loadLeaderboard()
+  await loadSummary()
+  await loadSeries()
+})
+</script>
--- a/frontend/src/views/shared/Dashboard.vue
+++ b/frontend/src/views/shared/Dashboard.vue
@@ -393,6 +393,14 @@
      </div>
    </div>

+    <!-- 趋势图表筛选 -->
+    <div class="flex flex-wrap items-center justify-between gap-3">
+      <h3 class="text-xs font-semibold uppercase tracking-wider text-muted-foreground">
+        统计周期
+      </h3>
+      <TimeRangePicker v-model="dailyTimeRange" :allow-hourly="true" />
+    </div>
+
    <!-- 趋势图表区域 -->
    <div class="grid grid-cols-1 gap-6 lg:grid-cols-2">
      <!-- 每日使用趋势（折线图）- 普通用户可见 -->
@@ -784,6 +792,8 @@
 import { ref, onMounted, computed, onBeforeUnmount, nextTick, watch } from 'vue'
 import { useAuthStore } from '@/stores/auth'
 import { dashboardApi, type DashboardStat, type DailyStat, type ProviderSummary } from '@/api/dashboard'
+import { getDateRangeFromPeriod } from '@/features/usage/composables'
+import type { DateRangeParams } from '@/features/usage/types'
 import { announcementApi, type Announcement } from '@/api/announcements'
 import {
  Card,
@@ -798,6 +808,7 @@ import {
  TableHead,
  TableCell,
 } from '@/components/ui'
+import { TimeRangePicker } from '@/components/common'
 import BarChart from '@/components/charts/BarChart.vue'
 import DoughnutChart from '@/components/charts/DoughnutChart.vue'
 import LineChart from '@/components/charts/LineChart.vue'
@@ -972,7 +983,8 @@ const tokenBreakdown = ref<{
 const activeUsers = ref(0)
 const dailyStats = ref<DailyStat[]>([])
 const providerSummary = ref<ProviderSummary[]>([])
-const selectedDays = ref(7)
+const dailyTimeRange = ref<DateRangeParams>(getDateRangeFromPeriod('last7days'))
+// 统计周期
 const loadingDaily = ref(false)
 const loading = ref(false)

@@ -1317,7 +1329,7 @@ async function loadDashboardData() {
 async function loadDailyStats() {
  loadingDaily.value = true
  try {
-    const response = await dashboardApi.getDailyStats(selectedDays.value)
+    const response = await dashboardApi.getDailyStats(dailyTimeRange.value)
    dailyStats.value = response.daily_stats
    providerSummary.value = response.provider_summary || []
  } catch {
@@ -1328,6 +1340,10 @@ async function loadDailyStats() {
  }
 }

+watch(dailyTimeRange, async () => {
+  await loadDailyStats()
+}, { deep: true })
+
 function formatDate(dateString: string): string {
  const date = new Date(dateString)
  const today = new Date()
--- a/frontend/src/views/shared/Usage.vue
+++ b/frontend/src/views/shared/Usage.vue
@@ -55,11 +55,12 @@
      :is-admin="isAdminPage"
      :show-actual-cost="authStore.isAdmin"
      :loading="isLoadingRecords"
-      :selected-period="selectedPeriod"
+      :time-range="timeRange"
      :filter-search="filterSearch"
      :filter-user="filterUser"
      :filter-model="filterModel"
      :filter-provider="filterProvider"
+      :filter-api-format="filterApiFormat"
      :filter-status="filterStatus"
      :available-users="availableUsers"
      :available-models="availableModels"
@@ -69,17 +70,17 @@
      :total-records="totalRecords"
      :page-size-options="pageSizeOptions"
      :auto-refresh="globalAutoRefresh"
-      @update:selected-period="handlePeriodChange"
+      @update:time-range="handleTimeRangeChange"
      @update:filter-search="handleFilterSearchChange"
      @update:filter-user="handleFilterUserChange"
      @update:filter-model="handleFilterModelChange"
      @update:filter-provider="handleFilterProviderChange"
+      @update:filter-api-format="handleFilterApiFormatChange"
      @update:filter-status="handleFilterStatusChange"
      @update:current-page="handlePageChange"
      @update:page-size="handlePageSizeChange"
      @update:auto-refresh="handleAutoRefreshChange"
      @refresh="refreshData"
-      @export="exportData"
      @show-detail="showRequestDetail"
    />

@@ -113,7 +114,7 @@ import {
  useUsageData,
  getDateRangeFromPeriod
 } from '@/features/usage/composables'
-import type { PeriodValue, FilterStatusValue } from '@/features/usage/types'
+import type { DateRangeParams, FilterStatusValue } from '@/features/usage/types'
 import type { UserOption } from '@/features/usage/components/UsageRecordsTable.vue'
 import { log } from '@/utils/logger'
 import type { ActivityHeatmap } from '@/types/activity'
@@ -126,8 +127,8 @@ const authStore = useAuthStore()
 // 判断是否是管理员页面
 const isAdminPage = computed(() => route.path.startsWith('/admin'))

-// 时间段选择
-const selectedPeriod = ref<PeriodValue>('today')
+// 时间范围选择
+const timeRange = ref<DateRangeParams>(getDateRangeFromPeriod('today'))

 // 分页状态
 const currentPage = ref(1)
@@ -139,6 +140,7 @@ const filterSearch = ref('')
 const filterUser = ref('__all__')
 const filterModel = ref('__all__')
 const filterProvider = ref('__all__')
+const filterApiFormat = ref('__all__')
 const filterStatus = ref<FilterStatusValue>('__all__')

 // 用户列表（仅管理员页面使用）
@@ -194,6 +196,12 @@ const filteredRecords = computed(() => {
      records = records.filter(record => record.provider === filterProvider.value)
    }

+    if (filterApiFormat.value !== '__all__') {
+      records = records.filter(record =>
+        record.api_format?.toUpperCase() === filterApiFormat.value.toUpperCase()
+      )
+    }
+
    if (filterStatus.value !== '__all__') {
      if (filterStatus.value === 'stream') {
        records = records.filter(record =>
@@ -386,11 +394,9 @@ const selectedRequestId = ref<string | null>(null)

 // 初始化加载
 onMounted(async () => {
-  const dateRange = getDateRangeFromPeriod(selectedPeriod.value)
-
  // 并行加载统计数据和热力图（使用 allSettled 避免其中一个失败影响另一个）
  const [statsResult, heatmapResult] = await Promise.allSettled([
-    loadStats(dateRange),
+    loadStats(timeRange.value),
    loadHeatmapData()
  ])

@@ -418,13 +424,11 @@ onMounted(async () => {
  }
 })

-// 处理时间段变化
-async function handlePeriodChange(value: string) {
-  selectedPeriod.value = value as PeriodValue
-  currentPage.value = 1  // 重置到第一页
-
-  const dateRange = getDateRangeFromPeriod(selectedPeriod.value)
-  await loadStats(dateRange)
+// 处理时间范围变化
+async function handleTimeRangeChange(value: DateRangeParams) {
+  timeRange.value = value
+  currentPage.value = 1 // 重置到第一页
+  await loadStats(timeRange.value)
  await loadRecords({ page: 1, pageSize: pageSize.value }, getCurrentFilters())
 }

@@ -448,6 +452,7 @@ function getCurrentFilters() {
    user_id: filterUser.value !== '__all__' ? filterUser.value : undefined,
    model: filterModel.value !== '__all__' ? filterModel.value : undefined,
    provider: filterProvider.value !== '__all__' ? filterProvider.value : undefined,
+    api_format: filterApiFormat.value !== '__all__' ? filterApiFormat.value : undefined,
    status: filterStatus.value !== '__all__' ? filterStatus.value : undefined
  }
 }
@@ -487,6 +492,15 @@ async function handleFilterProviderChange(value: string) {
  }
 }

+async function handleFilterApiFormatChange(value: string) {
+  filterApiFormat.value = value
+  currentPage.value = 1
+
+  if (isAdminPage.value) {
+    await loadRecords({ page: 1, pageSize: pageSize.value }, getCurrentFilters())
+  }
+}
+
 async function handleFilterStatusChange(value: string) {
  filterStatus.value = value as FilterStatusValue
  currentPage.value = 1
@@ -498,8 +512,7 @@ async function handleFilterStatusChange(value: string) {

 // 刷新数据
 async function refreshData() {
-  const dateRange = getDateRangeFromPeriod(selectedPeriod.value)
-  await loadStats(dateRange)
+  await loadStats(timeRange.value)
  await loadRecords({ page: currentPage.value, pageSize: pageSize.value }, getCurrentFilters())
 }

@@ -510,20 +523,6 @@ function showRequestDetail(id: string) {
  detailModalOpen.value = true
 }

-// 导出数据
-async function exportData(format: 'csv' | 'json') {
-  try {
-    const blob = await usageApi.exportUsage(format)
-    const url = window.URL.createObjectURL(blob)
-    const a = document.createElement('a')
-    a.href = url
-    a.download = `usage-stats.${format}`
-    a.click()
-    window.URL.revokeObjectURL(url)
-  } catch (error) {
-    log.error('导出失败:', error)
-  }
-}
 </script>

 <style scoped>
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ dependencies = [
    "aiosqlite>=0.22.1",
    "loguru>=0.7.3",
    "tiktoken>=0.12.0",
-    "regex>=2026.1.15",  # 支持超时的正则库，用于 ReDoS 防护
+    "regex>=2026.1.15", # 支持超时的正则库，用于 ReDoS 防护
    "aiofiles>=25.1.0",
    "aiohttp>=3.13.3",
    "aiosmtplib>=5.1.0",
--- a/src/api/admin/init.py
+++ b/src/api/admin/init.py
@@ -15,6 +15,7 @@ from .provider_query import router as provider_query_router
 from .provider_strategy import router as provider_strategy_router
 from .providers import router as providers_router
 from .security import router as security_router
+from .stats import router as stats_router
 from .system import router as system_router
 from .usage import router as usage_router
 from .users import router as users_router
@@ -33,6 +34,7 @@ router.include_router(provider_strategy_router)
 router.include_router(adaptive_router)
 router.include_router(models_router)
 router.include_router(security_router)
+router.include_router(stats_router)
 router.include_router(provider_query_router)
 router.include_router(management_tokens_router)
 router.include_router(modules_router)
--- a/src/api/admin/stats/init.py
+++ b/src/api/admin/stats/init.py
@@ -0,0 +1,22 @@
+"""Stats admin routes export."""
+
+from fastapi import APIRouter
+
+from .comparison import router as comparison_router
+from .cost import router as cost_router
+from .errors import router as errors_router
+from .leaderboard import router as leaderboard_router
+from .performance import router as performance_router
+from .quota import router as quota_router
+from .time_series import router as time_series_router
+
+router = APIRouter(prefix="/api/admin/stats", tags=["Admin - Stats"])
+router.include_router(leaderboard_router)
+router.include_router(time_series_router)
+router.include_router(cost_router)
+router.include_router(quota_router)
+router.include_router(performance_router)
+router.include_router(errors_router)
+router.include_router(comparison_router)
+
+__all__ = ["router"]
--- a/src/api/admin/stats/common.py
+++ b/src/api/admin/stats/common.py
@@ -0,0 +1,196 @@
+"""Shared helpers for admin stats routes."""
+
+from __future__ import annotations
+
+import hashlib
+import json
+from datetime import date, datetime, time, timedelta, timezone
+from typing import Any, Literal
+
+from fastapi import HTTPException
+from sqlalchemy import and_, or_
+
+from src.api.base.pipeline import ApiRequestPipeline
+from src.config.settings import config
+from src.models.database import Usage
+from src.services.system.time_range import TimeRangeParams
+
+pipeline = ApiRequestPipeline()
+
+
+def _apply_admin_default_range(
+    params: TimeRangeParams | None,
+) -> TimeRangeParams | None:
+    """Apply a default range to avoid unbounded scans."""
+    if params is not None:
+        return params
+
+    days = int(getattr(config, "admin_usage_default_days", 0) or 0)
+    if days <= 0:
+        return None
+
+    today = datetime.now(timezone.utc).date()
+    start_date = today - timedelta(days=days - 1)
+    return TimeRangeParams(
+        start_date=start_date,
+        end_date=today,
+        timezone="UTC",
+        tz_offset_minutes=0,
+    ).validate_and_resolve()
+
+
+def _build_time_range_params(
+    start_date: date | None,
+    end_date: date | None,
+    preset: str | None,
+    timezone_name: str | None,
+    tz_offset_minutes: int | None,
+) -> TimeRangeParams | None:
+    if not preset and start_date is None and end_date is None:
+        return None
+    try:
+        return TimeRangeParams(
+            start_date=start_date,
+            end_date=end_date,
+            preset=preset,
+            timezone=timezone_name,
+            tz_offset_minutes=tz_offset_minutes or 0,
+        ).validate_and_resolve()
+    except Exception as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+
+def _hash_filters(filters: dict[str, Any]) -> str:
+    raw = json.dumps(filters, sort_keys=True, ensure_ascii=False, default=str)
+    return hashlib.sha1(raw.encode("utf-8")).hexdigest()[:16]
+
+
+def _build_time_range_from_days(
+    days: int, timezone_name: str | None, tz_offset_minutes: int | None
+) -> TimeRangeParams:
+    base = TimeRangeParams(
+        preset="today",
+        timezone=timezone_name,
+        tz_offset_minutes=tz_offset_minutes or 0,
+    ).validate_and_resolve()
+    user_today = base.start_date
+    start_date = user_today - timedelta(days=days - 1)
+    return TimeRangeParams(
+        start_date=start_date,
+        end_date=user_today,
+        timezone=timezone_name,
+        tz_offset_minutes=tz_offset_minutes or 0,
+    ).validate_and_resolve()
+
+
+def _linear_regression(values: list[float]) -> tuple[float, float]:
+    n = len(values)
+    if n <= 1:
+        return 0.0, values[0] if values else 0.0
+    xs = list(range(n))
+    sum_x = sum(xs)
+    sum_y = sum(values)
+    sum_x2 = sum(x * x for x in xs)
+    sum_xy = sum(x * y for x, y in zip(xs, values))
+    denom = n * sum_x2 - sum_x * sum_x
+    if denom == 0:
+        return 0.0, values[-1]
+    slope = (n * sum_xy - sum_x * sum_y) / denom
+    intercept = (sum_y - slope * sum_x) / n
+    return slope, intercept
+
+
+def _build_cache_key(
+    leaderboard_type: str,
+    metric: str,
+    time_range: TimeRangeParams | None,
+    filters: dict[str, Any],
+) -> str:
+    start_value = time_range.start_date.isoformat() if time_range else "all"
+    end_value = time_range.end_date.isoformat() if time_range else "all"
+    tz_value = time_range.timezone if time_range else "utc"
+    offset_value = time_range.tz_offset_minutes if time_range else 0
+    return (
+        f"leaderboard:{leaderboard_type}:{metric}:{start_value}:{end_value}:"
+        f"{tz_value}:{offset_value}:{_hash_filters(filters)}"
+    )
+
+
+def _is_today_range(time_range: TimeRangeParams | None) -> bool:
+    if not time_range:
+        return False
+    try:
+        user_today = time_range._get_user_today()
+    except Exception:
+        return False
+    return time_range.end_date == user_today
+
+
+def _split_daily_and_usage_segments(
+    time_range: TimeRangeParams | None,
+    use_daily: bool,
+) -> tuple[tuple[datetime, datetime] | None, list[tuple[datetime, datetime]] | None]:
+    if not time_range:
+        return None, None
+
+    start_utc, end_utc = time_range.to_utc_datetime_range()
+    if not use_daily:
+        return None, [(start_utc, end_utc)]
+
+    complete_dates, head_boundary, tail_boundary = time_range.get_complete_utc_dates()
+    daily_range = None
+    if complete_dates:
+        daily_start = datetime.combine(complete_dates[0], time.min, tzinfo=timezone.utc)
+        daily_end = datetime.combine(
+            complete_dates[-1] + timedelta(days=1), time.min, tzinfo=timezone.utc
+        )
+        daily_range = (daily_start, daily_end)
+
+    usage_segments: list[tuple[datetime, datetime]] = []
+    if head_boundary:
+        usage_segments.append(head_boundary)
+    if tail_boundary:
+        usage_segments.append(tail_boundary)
+
+    if not daily_range and not usage_segments:
+        usage_segments = [(start_utc, end_utc)]
+
+    return daily_range, usage_segments
+
+
+def _apply_usage_time_segments(
+    query: Any, segments: list[tuple[datetime, datetime]] | None
+) -> Any | None:
+    if segments is None:
+        return query
+    if not segments:
+        return None
+
+    conditions = []
+    for start_utc, end_utc in segments:
+        if start_utc >= end_utc:
+            continue
+        conditions.append(and_(Usage.created_at >= start_utc, Usage.created_at < end_utc))
+
+    if not conditions:
+        return None
+
+    return query.filter(or_(*conditions))
+
+
+def _union_queries(queries: list[Any]) -> Any | None:
+    base = None
+    for query in queries:
+        if query is None:
+            continue
+        if base is None:
+            base = query
+        else:
+            base = base.union_all(query)
+    return base
+
+
+def _metric_order(
+    metric: Literal["requests", "tokens", "cost"], order: Literal["asc", "desc"], expr: Any
+) -> Any:
+    return expr.asc() if order == "asc" else expr.desc()
--- a/src/api/admin/stats/comparison.py
+++ b/src/api/admin/stats/comparison.py
@@ -0,0 +1,128 @@
+"""Admin comparison stats routes."""
+
+from __future__ import annotations
+
+from datetime import date, timedelta
+from typing import Any, Literal
+
+from fastapi import APIRouter, Depends, HTTPException, Query, Request
+from sqlalchemy.orm import Session
+
+from src.api.base.admin_adapter import AdminApiAdapter
+from src.api.base.context import ApiRequestContext
+from src.database import get_db
+from src.services.system.stats_aggregator import AggregatedStats, StatsFilter, query_stats_hybrid
+from src.services.system.time_range import TimeRangeParams
+
+from .common import pipeline
+
+router = APIRouter()
+
+
+class AdminComparisonAdapter(AdminApiAdapter):
+    def __init__(
+        self,
+        current_start: date,
+        current_end: date,
+        comparison_type: Literal["period", "year"],
+        timezone_name: str | None,
+        tz_offset_minutes: int | None,
+    ) -> None:
+        self.current_start = current_start
+        self.current_end = current_end
+        self.comparison_type = comparison_type
+        self.timezone_name = timezone_name
+        self.tz_offset_minutes = tz_offset_minutes
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        if self.current_start > self.current_end:
+            raise HTTPException(status_code=400, detail="current_start must be <= current_end")
+
+        days = (self.current_end - self.current_start).days + 1
+
+        def _safe_year_shift(value: date) -> date:
+            try:
+                return value.replace(year=value.year - 1)
+            except ValueError:
+                return value.replace(year=value.year - 1, day=28)
+
+        if self.comparison_type == "period":
+            comparison_end = self.current_start - timedelta(days=1)
+            comparison_start = comparison_end - timedelta(days=days - 1)
+        else:
+            comparison_start = _safe_year_shift(self.current_start)
+            comparison_end = _safe_year_shift(self.current_end)
+
+        current_range = TimeRangeParams(
+            start_date=self.current_start,
+            end_date=self.current_end,
+            timezone=self.timezone_name,
+            tz_offset_minutes=self.tz_offset_minutes or 0,
+        ).validate_and_resolve()
+        comparison_range = TimeRangeParams(
+            start_date=comparison_start,
+            end_date=comparison_end,
+            timezone=self.timezone_name,
+            tz_offset_minutes=self.tz_offset_minutes or 0,
+        ).validate_and_resolve()
+
+        current_stats = query_stats_hybrid(context.db, current_range, filters=StatsFilter())
+        comparison_stats = query_stats_hybrid(context.db, comparison_range, filters=StatsFilter())
+
+        def _stats_payload(stats: AggregatedStats) -> dict[str, Any]:
+            total_tokens = (
+                stats.input_tokens
+                + stats.output_tokens
+                + stats.cache_creation_tokens
+                + stats.cache_read_tokens
+            )
+            return {
+                "total_requests": stats.total_requests,
+                "total_tokens": total_tokens,
+                "total_cost": float(stats.total_cost),
+                "actual_total_cost": float(stats.actual_total_cost),
+                "avg_response_time_ms": float(stats.avg_response_time_ms),
+                "error_requests": stats.error_requests,
+            }
+
+        def _pct_change(current: float, previous: float) -> float | None:
+            if previous == 0:
+                return None if current != 0 else 0.0
+            return round((current - previous) / previous * 100, 2)
+
+        current_payload = _stats_payload(current_stats)
+        comparison_payload = _stats_payload(comparison_stats)
+        changes = {
+            key: _pct_change(float(current_payload[key]), float(comparison_payload[key]))
+            for key in current_payload.keys()
+        }
+
+        return {
+            "current": current_payload,
+            "comparison": comparison_payload,
+            "change_percent": changes,
+            "current_start": self.current_start.isoformat(),
+            "current_end": self.current_end.isoformat(),
+            "comparison_start": comparison_start.isoformat(),
+            "comparison_end": comparison_end.isoformat(),
+        }
+
+
+@router.get("/comparison")
+async def get_comparison(
+    request: Request,
+    db: Session = Depends(get_db),
+    current_start: date = Query(...),
+    current_end: date = Query(...),
+    comparison_type: Literal["period", "year"] = Query("period"),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+) -> Any:
+    adapter = AdminComparisonAdapter(
+        current_start=current_start,
+        current_end=current_end,
+        comparison_type=comparison_type,
+        timezone_name=timezone_name,
+        tz_offset_minutes=tz_offset_minutes,
+    )
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
--- a/src/api/admin/stats/cost.py
+++ b/src/api/admin/stats/cost.py
@@ -0,0 +1,183 @@
+"""Admin cost stats routes."""
+
+from __future__ import annotations
+
+from datetime import date, timedelta
+from typing import Any
+
+from fastapi import APIRouter, Depends, HTTPException, Query, Request
+from sqlalchemy import func
+from sqlalchemy.orm import Session
+
+from src.api.base.admin_adapter import AdminApiAdapter
+from src.api.base.context import ApiRequestContext
+from src.database import get_db
+from src.models.database import Usage
+from src.services.system.stats_aggregator import query_time_series
+from src.services.system.time_range import TimeRangeParams
+
+from .common import (
+    _apply_admin_default_range,
+    _build_time_range_from_days,
+    _build_time_range_params,
+    _linear_regression,
+    pipeline,
+)
+
+router = APIRouter()
+
+
+class AdminCostForecastAdapter(AdminApiAdapter):
+    def __init__(
+        self,
+        time_range: TimeRangeParams | None,
+        days: int,
+        forecast_days: int,
+        timezone_name: str | None,
+        tz_offset_minutes: int | None,
+    ) -> None:
+        self.time_range = time_range
+        self.days = days
+        self.forecast_days = forecast_days
+        self.timezone_name = timezone_name
+        self.tz_offset_minutes = tz_offset_minutes
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        time_range = self.time_range or _build_time_range_from_days(
+            self.days, self.timezone_name, self.tz_offset_minutes
+        )
+        time_range.granularity = "day"
+        try:
+            series = query_time_series(context.db, time_range)
+        except ValueError as exc:
+            raise HTTPException(status_code=400, detail=str(exc)) from exc
+        history = [
+            {"date": item["date"], "total_cost": float(item.get("total_cost", 0.0))}
+            for item in series
+        ]
+
+        values = [item["total_cost"] for item in history]
+        slope, intercept = _linear_regression(values)
+
+        forecast = []
+        if history:
+            last_date = date.fromisoformat(history[-1]["date"])
+        else:
+            last_date = time_range.end_date
+        for i in range(self.forecast_days):
+            idx = len(values) + i
+            predicted = max(0.0, slope * idx + intercept)
+            forecast.append(
+                {
+                    "date": (last_date + timedelta(days=i + 1)).isoformat(),
+                    "total_cost": round(predicted, 4),
+                }
+            )
+
+        return {
+            "history": history,
+            "forecast": forecast,
+            "slope": round(slope, 6),
+            "intercept": round(intercept, 6),
+            "start_date": time_range.start_date.isoformat(),
+            "end_date": time_range.end_date.isoformat(),
+        }
+
+
+@router.get("/cost/forecast")
+async def get_cost_forecast(
+    request: Request,
+    db: Session = Depends(get_db),
+    start_date: date | None = Query(None),
+    end_date: date | None = Query(None),
+    preset: str | None = Query(None),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+    days: int = Query(30, ge=7, le=365),
+    forecast_days: int = Query(7, ge=1, le=90),
+) -> Any:
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
+    )
+    adapter = AdminCostForecastAdapter(
+        time_range=time_range,
+        days=days,
+        forecast_days=forecast_days,
+        timezone_name=timezone_name,
+        tz_offset_minutes=tz_offset_minutes,
+    )
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
+
+
+class AdminCostSavingsAdapter(AdminApiAdapter):
+    def __init__(
+        self,
+        time_range: TimeRangeParams | None,
+        provider_name: str | None,
+        model: str | None,
+    ) -> None:
+        self.time_range = _apply_admin_default_range(time_range)
+        self.provider_name = provider_name
+        self.model = model
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        if not self.time_range:
+            return {
+                "cache_read_tokens": 0,
+                "cache_read_cost": 0.0,
+                "cache_creation_cost": 0.0,
+                "estimated_full_cost": 0.0,
+                "cache_savings": 0.0,
+            }
+
+        start_utc, end_utc = self.time_range.to_utc_datetime_range()
+        query = context.db.query(
+            func.sum(Usage.cache_read_input_tokens).label("cache_read_tokens"),
+            func.sum(Usage.cache_read_cost_usd).label("cache_read_cost"),
+            func.sum(Usage.cache_creation_cost_usd).label("cache_creation_cost"),
+            func.sum(
+                func.coalesce(Usage.output_price_per_1m, 0) * Usage.cache_read_input_tokens
+            ).label("estimated_full_cost_raw"),
+        ).filter(Usage.created_at >= start_utc, Usage.created_at < end_utc)
+        if self.provider_name:
+            query = query.filter(Usage.provider_name == self.provider_name)
+        if self.model:
+            query = query.filter(Usage.model == self.model)
+
+        row = query.first()
+        cache_read_tokens = int(getattr(row, "cache_read_tokens", 0) or 0)
+        cache_read_cost = float(getattr(row, "cache_read_cost", 0) or 0.0)
+        cache_creation_cost = float(getattr(row, "cache_creation_cost", 0) or 0.0)
+        estimated_full_cost = float(getattr(row, "estimated_full_cost_raw", 0) or 0.0) / 1_000_000
+        if estimated_full_cost <= 0 and cache_read_cost > 0:
+            estimated_full_cost = cache_read_cost * 10
+        cache_savings = estimated_full_cost - cache_read_cost
+
+        return {
+            "cache_read_tokens": cache_read_tokens,
+            "cache_read_cost": round(cache_read_cost, 6),
+            "cache_creation_cost": round(cache_creation_cost, 6),
+            "estimated_full_cost": round(estimated_full_cost, 6),
+            "cache_savings": round(cache_savings, 6),
+        }
+
+
+@router.get("/cost/savings")
+async def get_cost_savings(
+    request: Request,
+    db: Session = Depends(get_db),
+    start_date: date | None = Query(None),
+    end_date: date | None = Query(None),
+    preset: str | None = Query(None),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+    provider_name: str | None = Query(None),
+    model: str | None = Query(None),
+) -> Any:
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
+    )
+    adapter = AdminCostSavingsAdapter(
+        time_range=time_range, provider_name=provider_name, model=model
+    )
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
--- a/src/api/admin/stats/errors.py
+++ b/src/api/admin/stats/errors.py
@@ -0,0 +1,111 @@
+"""Admin error stats routes."""
+
+from __future__ import annotations
+
+from datetime import date, timezone
+from typing import Any
+
+from fastapi import APIRouter, Depends, Query, Request
+from sqlalchemy import func
+from sqlalchemy.orm import Session
+
+from src.api.base.admin_adapter import AdminApiAdapter
+from src.api.base.context import ApiRequestContext
+from src.database import get_db
+from src.models.database import StatsDailyError, Usage
+from src.services.system.time_range import TimeRangeParams
+
+from .common import _apply_admin_default_range, _build_time_range_params, pipeline
+
+router = APIRouter()
+
+
+class AdminErrorDistributionAdapter(AdminApiAdapter):
+    def __init__(self, time_range: TimeRangeParams | None) -> None:
+        self.time_range = _apply_admin_default_range(time_range)
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        if not self.time_range:
+            return {"distribution": [], "trend": []}
+
+        time_range = self.time_range
+        is_utc = (time_range.timezone in {None, "UTC"}) and time_range.tz_offset_minutes == 0
+        distribution: dict[str, int] = {}
+        trend: dict[str, dict[str, int]] = {}
+
+        if is_utc:
+            start_utc, end_utc = time_range.to_utc_datetime_range()
+            rows = (
+                context.db.query(StatsDailyError)
+                .filter(StatsDailyError.date >= start_utc, StatsDailyError.date < end_utc)
+                .all()
+            )
+            for row in rows:
+                date_str = (
+                    row.date.astimezone(timezone.utc).date().isoformat()
+                    if row.date.tzinfo
+                    else row.date.date().isoformat()
+                )
+                distribution[row.error_category] = distribution.get(row.error_category, 0) + int(
+                    row.count or 0
+                )
+                trend.setdefault(date_str, {})
+                trend[date_str][row.error_category] = trend[date_str].get(
+                    row.error_category, 0
+                ) + int(row.count or 0)
+        else:
+            for local_date, day_start_utc, day_end_utc in time_range.get_local_day_hours():
+                rows = (
+                    context.db.query(
+                        Usage.error_category,
+                        func.count(Usage.id).label("count"),
+                    )
+                    .filter(
+                        Usage.created_at >= day_start_utc,
+                        Usage.created_at < day_end_utc,
+                        Usage.error_category.isnot(None),
+                    )
+                    .group_by(Usage.error_category)
+                    .all()
+                )
+                date_str = local_date.isoformat()
+                for row in rows:
+                    distribution[row.error_category] = distribution.get(
+                        row.error_category, 0
+                    ) + int(row.count or 0)
+                    trend.setdefault(date_str, {})
+                    trend[date_str][row.error_category] = trend[date_str].get(
+                        row.error_category, 0
+                    ) + int(row.count or 0)
+
+        trend_items = []
+        for day in sorted(trend.keys()):
+            counts = trend[day]
+            total = sum(counts.values())
+            trend_items.append({"date": day, "total": total, "categories": counts})
+
+        distribution_items = [
+            {"category": category, "count": count}
+            for category, count in sorted(
+                distribution.items(), key=lambda item: item[1], reverse=True
+            )
+        ]
+
+        return {"distribution": distribution_items, "trend": trend_items}
+
+
+@router.get("/errors/distribution")
+async def get_error_distribution(
+    request: Request,
+    db: Session = Depends(get_db),
+    start_date: date | None = Query(None),
+    end_date: date | None = Query(None),
+    preset: str | None = Query(None),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+) -> Any:
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
+    )
+    adapter = AdminErrorDistributionAdapter(time_range=time_range)
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
--- a/src/api/admin/stats/leaderboard.py
+++ b/src/api/admin/stats/leaderboard.py
@@ -0,0 +1,759 @@
+"""Admin leaderboard stats routes."""
+
+from __future__ import annotations
+
+import json
+from datetime import date
+from typing import Any, Literal
+
+from fastapi import APIRouter, Depends, Query, Request
+from sqlalchemy import func
+from sqlalchemy.orm import Session
+
+from src.api.base.admin_adapter import AdminApiAdapter
+from src.api.base.context import ApiRequestContext
+from src.clients.redis_client import get_redis_client_sync
+from src.config.constants import CacheTTL
+from src.core.enums import UserRole
+from src.database import get_db
+from src.models.database import (
+    ApiKey,
+    StatsDailyApiKey,
+    StatsDailyModel,
+    StatsUserDaily,
+    Usage,
+    User,
+)
+from src.services.system.time_range import TimeRangeParams
+
+from .common import (
+    _apply_admin_default_range,
+    _apply_usage_time_segments,
+    _build_cache_key,
+    _build_time_range_params,
+    _is_today_range,
+    _metric_order,
+    _split_daily_and_usage_segments,
+    _union_queries,
+    pipeline,
+)
+
+router = APIRouter()
+
+
+class AdminUserLeaderboardAdapter(AdminApiAdapter):
+    def __init__(
+        self,
+        time_range: TimeRangeParams | None,
+        metric: Literal["requests", "tokens", "cost"],
+        order: Literal["asc", "desc"],
+        limit: int,
+        offset: int,
+        provider_name: str | None,
+        model: str | None,
+        include_inactive: bool,
+        exclude_admin: bool,
+    ) -> None:
+        self.time_range = _apply_admin_default_range(time_range)
+        self.metric = metric
+        self.order = order
+        self.limit = limit
+        self.offset = offset
+        self.provider_name = provider_name
+        self.model = model
+        self.include_inactive = include_inactive
+        self.exclude_admin = exclude_admin
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        db = context.db
+        cacheable = not _is_today_range(self.time_range)
+        redis_client = get_redis_client_sync()
+        cache_key = None
+        if cacheable and redis_client:
+            cache_key = _build_cache_key(
+                "users",
+                self.metric,
+                self.time_range,
+                {
+                    "order": self.order,
+                    "limit": self.limit,
+                    "offset": self.offset,
+                    "provider_name": self.provider_name,
+                    "model": self.model,
+                    "include_inactive": self.include_inactive,
+                    "exclude_admin": self.exclude_admin,
+                },
+            )
+            cached = await redis_client.get(cache_key)
+            if cached:
+                try:
+                    return json.loads(cached)
+                except Exception:
+                    pass
+
+        use_daily = self.time_range is not None and not self.provider_name and not self.model
+        daily_range, usage_segments = _split_daily_and_usage_segments(self.time_range, use_daily)
+
+        daily_query = None
+        if daily_range:
+            daily_query = (
+                db.query(
+                    StatsUserDaily.user_id.label("entity_id"),
+                    func.sum(StatsUserDaily.total_requests).label("requests"),
+                    func.sum(
+                        StatsUserDaily.input_tokens
+                        + StatsUserDaily.output_tokens
+                        + StatsUserDaily.cache_creation_tokens
+                        + StatsUserDaily.cache_read_tokens
+                    ).label("tokens"),
+                    func.sum(StatsUserDaily.total_cost).label("cost"),
+                )
+                .filter(StatsUserDaily.date >= daily_range[0], StatsUserDaily.date < daily_range[1])
+                .group_by(StatsUserDaily.user_id)
+            )
+
+        usage_query = db.query(
+            Usage.user_id.label("entity_id"),
+            func.count(Usage.id).label("requests"),
+            func.sum(
+                Usage.input_tokens
+                + Usage.output_tokens
+                + Usage.cache_creation_input_tokens
+                + Usage.cache_read_input_tokens
+            ).label("tokens"),
+            func.sum(Usage.total_cost_usd).label("cost"),
+        ).filter(
+            Usage.user_id.isnot(None),
+            Usage.status.notin_(["pending", "streaming"]),
+            Usage.provider_name.notin_(["unknown", "pending"]),
+        )
+        if self.provider_name:
+            usage_query = usage_query.filter(Usage.provider_name == self.provider_name)
+        if self.model:
+            usage_query = usage_query.filter(Usage.model == self.model)
+        usage_query = _apply_usage_time_segments(usage_query, usage_segments)
+        if usage_query is not None:
+            usage_query = usage_query.group_by(Usage.user_id)
+
+        union_query = _union_queries([daily_query, usage_query])
+        if union_query is None:
+            return {
+                "items": [],
+                "total": 0,
+                "metric": self.metric,
+                "start_date": self.time_range.start_date.isoformat() if self.time_range else None,
+                "end_date": self.time_range.end_date.isoformat() if self.time_range else None,
+            }
+
+        union_subq = union_query.subquery()
+        agg_subq = (
+            db.query(
+                union_subq.c.entity_id.label("entity_id"),
+                func.sum(union_subq.c.requests).label("requests"),
+                func.sum(union_subq.c.tokens).label("tokens"),
+                func.sum(union_subq.c.cost).label("cost"),
+            )
+            .group_by(union_subq.c.entity_id)
+            .subquery()
+        )
+
+        base_query = (
+            db.query(
+                User.id.label("id"),
+                User.username,
+                User.email,
+                agg_subq.c.requests,
+                agg_subq.c.tokens,
+                agg_subq.c.cost,
+            )
+            .join(agg_subq, agg_subq.c.entity_id == User.id)
+            .filter(User.is_deleted.is_(False))
+        )
+        if not self.include_inactive:
+            base_query = base_query.filter(User.is_active.is_(True))
+        if self.exclude_admin:
+            base_query = base_query.filter(User.role != UserRole.ADMIN)
+
+        metric_expr = {
+            "requests": agg_subq.c.requests,
+            "tokens": agg_subq.c.tokens,
+            "cost": agg_subq.c.cost,
+        }[self.metric]
+        order_expr = _metric_order(self.metric, self.order, metric_expr)
+        rank_expr = func.dense_rank().over(order_by=order_expr).label("rank")
+
+        total = db.query(func.count()).select_from(base_query.subquery()).scalar() or 0
+        rows = (
+            base_query.add_columns(rank_expr, metric_expr.label("metric_value"))
+            .order_by(order_expr)
+            .offset(self.offset)
+            .limit(self.limit)
+            .all()
+        )
+
+        items = []
+        for row in rows:
+            name = row.username or row.email or str(row.id)
+            value = row.metric_value or 0
+            if self.metric in {"requests", "tokens"}:
+                value = int(value)
+            else:
+                value = float(value)
+            items.append(
+                {
+                    "rank": int(row.rank),
+                    "id": row.id,
+                    "name": name,
+                    "value": value,
+                    "requests": int(row.requests or 0),
+                    "tokens": int(row.tokens or 0),
+                    "cost": float(row.cost or 0.0),
+                }
+            )
+
+        context.add_audit_metadata(
+            action="leaderboard_users",
+            start_date=self.time_range.start_date.isoformat() if self.time_range else None,
+            end_date=self.time_range.end_date.isoformat() if self.time_range else None,
+            preset=self.time_range.preset if self.time_range else None,
+            timezone=self.time_range.timezone if self.time_range else None,
+            metric=self.metric,
+            order=self.order,
+            limit=self.limit,
+            offset=self.offset,
+            provider_name=self.provider_name,
+            model=self.model,
+            include_inactive=self.include_inactive,
+            exclude_admin=self.exclude_admin,
+            result_count=len(items),
+            total=total,
+        )
+
+        result = {
+            "items": items,
+            "total": total,
+            "metric": self.metric,
+            "start_date": self.time_range.start_date.isoformat() if self.time_range else None,
+            "end_date": self.time_range.end_date.isoformat() if self.time_range else None,
+        }
+
+        if cacheable and redis_client and cache_key:
+            try:
+                await redis_client.setex(
+                    cache_key, CacheTTL.ADMIN_LEADERBOARD, json.dumps(result, ensure_ascii=False)
+                )
+            except Exception:
+                pass
+
+        return result
+
+
+class AdminApiKeyLeaderboardAdapter(AdminApiAdapter):
+    def __init__(
+        self,
+        time_range: TimeRangeParams | None,
+        metric: Literal["requests", "tokens", "cost"],
+        order: Literal["asc", "desc"],
+        limit: int,
+        offset: int,
+        provider_name: str | None,
+        model: str | None,
+        include_inactive: bool,
+        exclude_admin: bool,
+    ) -> None:
+        self.time_range = _apply_admin_default_range(time_range)
+        self.metric = metric
+        self.order = order
+        self.limit = limit
+        self.offset = offset
+        self.provider_name = provider_name
+        self.model = model
+        self.include_inactive = include_inactive
+        self.exclude_admin = exclude_admin
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        db = context.db
+        cacheable = not _is_today_range(self.time_range)
+        redis_client = get_redis_client_sync()
+        cache_key = None
+        if cacheable and redis_client:
+            cache_key = _build_cache_key(
+                "api_keys",
+                self.metric,
+                self.time_range,
+                {
+                    "order": self.order,
+                    "limit": self.limit,
+                    "offset": self.offset,
+                    "provider_name": self.provider_name,
+                    "model": self.model,
+                    "include_inactive": self.include_inactive,
+                    "exclude_admin": self.exclude_admin,
+                },
+            )
+            cached = await redis_client.get(cache_key)
+            if cached:
+                try:
+                    return json.loads(cached)
+                except Exception:
+                    pass
+
+        use_daily = self.time_range is not None and not self.provider_name and not self.model
+        daily_range, usage_segments = _split_daily_and_usage_segments(self.time_range, use_daily)
+
+        daily_query = None
+        if daily_range:
+            daily_query = (
+                db.query(
+                    StatsDailyApiKey.api_key_id.label("entity_id"),
+                    func.sum(StatsDailyApiKey.total_requests).label("requests"),
+                    func.sum(
+                        StatsDailyApiKey.input_tokens
+                        + StatsDailyApiKey.output_tokens
+                        + StatsDailyApiKey.cache_creation_tokens
+                        + StatsDailyApiKey.cache_read_tokens
+                    ).label("tokens"),
+                    func.sum(StatsDailyApiKey.total_cost).label("cost"),
+                )
+                .filter(
+                    StatsDailyApiKey.date >= daily_range[0], StatsDailyApiKey.date < daily_range[1]
+                )
+                .group_by(StatsDailyApiKey.api_key_id)
+            )
+
+        usage_query = db.query(
+            Usage.api_key_id.label("entity_id"),
+            func.count(Usage.id).label("requests"),
+            func.sum(
+                Usage.input_tokens
+                + Usage.output_tokens
+                + Usage.cache_creation_input_tokens
+                + Usage.cache_read_input_tokens
+            ).label("tokens"),
+            func.sum(Usage.total_cost_usd).label("cost"),
+        ).filter(
+            Usage.api_key_id.isnot(None),
+            Usage.status.notin_(["pending", "streaming"]),
+            Usage.provider_name.notin_(["unknown", "pending"]),
+        )
+        if self.provider_name:
+            usage_query = usage_query.filter(Usage.provider_name == self.provider_name)
+        if self.model:
+            usage_query = usage_query.filter(Usage.model == self.model)
+
+        usage_query = _apply_usage_time_segments(usage_query, usage_segments)
+        if usage_query is None:
+            return {
+                "items": [],
+                "total": 0,
+                "metric": self.metric,
+                "start_date": self.time_range.start_date.isoformat() if self.time_range else None,
+                "end_date": self.time_range.end_date.isoformat() if self.time_range else None,
+            }
+        usage_query = usage_query.group_by(Usage.api_key_id)
+
+        union_query = _union_queries([daily_query, usage_query])
+        if union_query is None:
+            return {
+                "items": [],
+                "total": 0,
+                "metric": self.metric,
+                "start_date": self.time_range.start_date.isoformat() if self.time_range else None,
+                "end_date": self.time_range.end_date.isoformat() if self.time_range else None,
+            }
+
+        union_subq = union_query.subquery()
+        agg_subq = (
+            db.query(
+                union_subq.c.entity_id.label("entity_id"),
+                func.sum(union_subq.c.requests).label("requests"),
+                func.sum(union_subq.c.tokens).label("tokens"),
+                func.sum(union_subq.c.cost).label("cost"),
+            )
+            .group_by(union_subq.c.entity_id)
+            .subquery()
+        )
+
+        base_query = (
+            db.query(
+                ApiKey,
+                User,
+                agg_subq.c.requests,
+                agg_subq.c.tokens,
+                agg_subq.c.cost,
+            )
+            .join(agg_subq, agg_subq.c.entity_id == ApiKey.id)
+            .join(User, User.id == ApiKey.user_id)
+            .filter(User.is_deleted.is_(False))
+        )
+        if not self.include_inactive:
+            base_query = base_query.filter(ApiKey.is_active.is_(True))
+        if self.exclude_admin:
+            base_query = base_query.filter(User.role != UserRole.ADMIN)
+
+        metric_expr = {
+            "requests": agg_subq.c.requests,
+            "tokens": agg_subq.c.tokens,
+            "cost": agg_subq.c.cost,
+        }[self.metric]
+        order_expr = _metric_order(self.metric, self.order, metric_expr)
+        rank_expr = func.dense_rank().over(order_by=order_expr).label("rank")
+
+        total = db.query(func.count()).select_from(base_query.subquery()).scalar() or 0
+        rows = (
+            base_query.add_columns(rank_expr, metric_expr.label("metric_value"))
+            .order_by(order_expr)
+            .offset(self.offset)
+            .limit(self.limit)
+            .all()
+        )
+
+        items = []
+        for row in rows:
+            api_key = row.ApiKey
+            name = api_key.name or api_key.get_display_key()
+            value = row.metric_value or 0
+            if self.metric in {"requests", "tokens"}:
+                value = int(value)
+            else:
+                value = float(value)
+            items.append(
+                {
+                    "rank": int(row.rank),
+                    "id": api_key.id,
+                    "name": name,
+                    "value": value,
+                    "requests": int(row.requests or 0),
+                    "tokens": int(row.tokens or 0),
+                    "cost": float(row.cost or 0.0),
+                }
+            )
+
+        context.add_audit_metadata(
+            action="leaderboard_api_keys",
+            start_date=self.time_range.start_date.isoformat() if self.time_range else None,
+            end_date=self.time_range.end_date.isoformat() if self.time_range else None,
+            preset=self.time_range.preset if self.time_range else None,
+            timezone=self.time_range.timezone if self.time_range else None,
+            metric=self.metric,
+            order=self.order,
+            limit=self.limit,
+            offset=self.offset,
+            provider_name=self.provider_name,
+            model=self.model,
+            include_inactive=self.include_inactive,
+            exclude_admin=self.exclude_admin,
+            result_count=len(items),
+            total=total,
+        )
+
+        result = {
+            "items": items,
+            "total": total,
+            "metric": self.metric,
+            "start_date": self.time_range.start_date.isoformat() if self.time_range else None,
+            "end_date": self.time_range.end_date.isoformat() if self.time_range else None,
+        }
+
+        if cacheable and redis_client and cache_key:
+            try:
+                await redis_client.setex(
+                    cache_key, CacheTTL.ADMIN_LEADERBOARD, json.dumps(result, ensure_ascii=False)
+                )
+            except Exception:
+                pass
+
+        return result
+
+
+class AdminModelLeaderboardAdapter(AdminApiAdapter):
+    def __init__(
+        self,
+        time_range: TimeRangeParams | None,
+        metric: Literal["requests", "tokens", "cost"],
+        order: Literal["asc", "desc"],
+        limit: int,
+        offset: int,
+        provider_name: str | None,
+        model: str | None,
+    ) -> None:
+        self.time_range = _apply_admin_default_range(time_range)
+        self.metric = metric
+        self.order = order
+        self.limit = limit
+        self.offset = offset
+        self.provider_name = provider_name
+        self.model = model
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        db = context.db
+        cacheable = not _is_today_range(self.time_range)
+        redis_client = get_redis_client_sync()
+        cache_key = None
+        if cacheable and redis_client:
+            cache_key = _build_cache_key(
+                "models",
+                self.metric,
+                self.time_range,
+                {
+                    "order": self.order,
+                    "limit": self.limit,
+                    "offset": self.offset,
+                    "provider_name": self.provider_name,
+                    "model": self.model,
+                },
+            )
+            cached = await redis_client.get(cache_key)
+            if cached:
+                try:
+                    return json.loads(cached)
+                except Exception:
+                    pass
+
+        use_daily = self.time_range is not None and not self.provider_name
+        daily_range, usage_segments = _split_daily_and_usage_segments(self.time_range, use_daily)
+
+        daily_query = None
+        if daily_range:
+            daily_query = (
+                db.query(
+                    StatsDailyModel.model.label("entity_id"),
+                    func.sum(StatsDailyModel.total_requests).label("requests"),
+                    func.sum(
+                        StatsDailyModel.input_tokens
+                        + StatsDailyModel.output_tokens
+                        + StatsDailyModel.cache_creation_tokens
+                        + StatsDailyModel.cache_read_tokens
+                    ).label("tokens"),
+                    func.sum(StatsDailyModel.total_cost).label("cost"),
+                )
+                .filter(
+                    StatsDailyModel.date >= daily_range[0], StatsDailyModel.date < daily_range[1]
+                )
+                .group_by(StatsDailyModel.model)
+            )
+            if self.model:
+                daily_query = daily_query.filter(StatsDailyModel.model == self.model)
+
+        usage_query = db.query(
+            Usage.model.label("entity_id"),
+            func.count(Usage.id).label("requests"),
+            func.sum(
+                Usage.input_tokens
+                + Usage.output_tokens
+                + Usage.cache_creation_input_tokens
+                + Usage.cache_read_input_tokens
+            ).label("tokens"),
+            func.sum(Usage.total_cost_usd).label("cost"),
+        ).filter(
+            Usage.status.notin_(["pending", "streaming"]),
+            Usage.provider_name.notin_(["unknown", "pending"]),
+        )
+        if self.provider_name:
+            usage_query = usage_query.filter(Usage.provider_name == self.provider_name)
+        if self.model:
+            usage_query = usage_query.filter(Usage.model == self.model)
+        usage_query = _apply_usage_time_segments(usage_query, usage_segments)
+        if usage_query is not None:
+            usage_query = usage_query.group_by(Usage.model)
+
+        union_query = _union_queries([daily_query, usage_query])
+        if union_query is None:
+            return {
+                "items": [],
+                "total": 0,
+                "metric": self.metric,
+                "start_date": self.time_range.start_date.isoformat() if self.time_range else None,
+                "end_date": self.time_range.end_date.isoformat() if self.time_range else None,
+            }
+
+        union_subq = union_query.subquery()
+        agg_subq = (
+            db.query(
+                union_subq.c.entity_id.label("entity_id"),
+                func.sum(union_subq.c.requests).label("requests"),
+                func.sum(union_subq.c.tokens).label("tokens"),
+                func.sum(union_subq.c.cost).label("cost"),
+            )
+            .group_by(union_subq.c.entity_id)
+            .subquery()
+        )
+
+        base_query = db.query(
+            agg_subq.c.entity_id.label("id"),
+            agg_subq.c.entity_id.label("name"),
+            agg_subq.c.requests,
+            agg_subq.c.tokens,
+            agg_subq.c.cost,
+        )
+
+        metric_expr = {
+            "requests": agg_subq.c.requests,
+            "tokens": agg_subq.c.tokens,
+            "cost": agg_subq.c.cost,
+        }[self.metric]
+        order_expr = _metric_order(self.metric, self.order, metric_expr)
+        rank_expr = func.dense_rank().over(order_by=order_expr).label("rank")
+
+        total = db.query(func.count()).select_from(base_query.subquery()).scalar() or 0
+        rows = (
+            base_query.add_columns(rank_expr, metric_expr.label("metric_value"))
+            .order_by(order_expr)
+            .offset(self.offset)
+            .limit(self.limit)
+            .all()
+        )
+
+        items = []
+        for row in rows:
+            value = row.metric_value or 0
+            if self.metric in {"requests", "tokens"}:
+                value = int(value)
+            else:
+                value = float(value)
+            items.append(
+                {
+                    "rank": int(row.rank),
+                    "id": row.id,
+                    "name": row.name,
+                    "value": value,
+                    "requests": int(row.requests or 0),
+                    "tokens": int(row.tokens or 0),
+                    "cost": float(row.cost or 0.0),
+                }
+            )
+
+        context.add_audit_metadata(
+            action="leaderboard_models",
+            start_date=self.time_range.start_date.isoformat() if self.time_range else None,
+            end_date=self.time_range.end_date.isoformat() if self.time_range else None,
+            preset=self.time_range.preset if self.time_range else None,
+            timezone=self.time_range.timezone if self.time_range else None,
+            metric=self.metric,
+            order=self.order,
+            limit=self.limit,
+            offset=self.offset,
+            provider_name=self.provider_name,
+            model=self.model,
+            result_count=len(items),
+            total=total,
+        )
+
+        result = {
+            "items": items,
+            "total": total,
+            "metric": self.metric,
+            "start_date": self.time_range.start_date.isoformat() if self.time_range else None,
+            "end_date": self.time_range.end_date.isoformat() if self.time_range else None,
+        }
+
+        if cacheable and redis_client and cache_key:
+            try:
+                await redis_client.setex(
+                    cache_key, CacheTTL.ADMIN_LEADERBOARD, json.dumps(result, ensure_ascii=False)
+                )
+            except Exception:
+                pass
+
+        return result
+
+
+@router.get("/leaderboard/users")
+async def get_user_leaderboard(
+    request: Request,
+    db: Session = Depends(get_db),
+    start_date: date | None = Query(None),
+    end_date: date | None = Query(None),
+    preset: str | None = Query(None),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+    metric: Literal["requests", "tokens", "cost"] = Query("requests"),
+    order: Literal["desc", "asc"] = Query("desc"),
+    limit: int = Query(10, ge=1, le=100),
+    offset: int = Query(0, ge=0),
+    provider_name: str | None = Query(None),
+    model: str | None = Query(None),
+    include_inactive: bool = Query(False),
+    exclude_admin: bool = Query(False),
+) -> Any:
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
+    )
+    adapter = AdminUserLeaderboardAdapter(
+        time_range=time_range,
+        metric=metric,
+        order=order,
+        limit=limit,
+        offset=offset,
+        provider_name=provider_name,
+        model=model,
+        include_inactive=include_inactive,
+        exclude_admin=exclude_admin,
+    )
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
+
+
+@router.get("/leaderboard/api-keys")
+async def get_api_key_leaderboard(
+    request: Request,
+    db: Session = Depends(get_db),
+    start_date: date | None = Query(None),
+    end_date: date | None = Query(None),
+    preset: str | None = Query(None),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+    metric: Literal["requests", "tokens", "cost"] = Query("requests"),
+    order: Literal["desc", "asc"] = Query("desc"),
+    limit: int = Query(10, ge=1, le=100),
+    offset: int = Query(0, ge=0),
+    provider_name: str | None = Query(None),
+    model: str | None = Query(None),
+    include_inactive: bool = Query(False),
+    exclude_admin: bool = Query(False),
+) -> Any:
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
+    )
+    adapter = AdminApiKeyLeaderboardAdapter(
+        time_range=time_range,
+        metric=metric,
+        order=order,
+        limit=limit,
+        offset=offset,
+        provider_name=provider_name,
+        model=model,
+        include_inactive=include_inactive,
+        exclude_admin=exclude_admin,
+    )
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
+
+
+@router.get("/leaderboard/models")
+async def get_model_leaderboard(
+    request: Request,
+    db: Session = Depends(get_db),
+    start_date: date | None = Query(None),
+    end_date: date | None = Query(None),
+    preset: str | None = Query(None),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+    metric: Literal["requests", "tokens", "cost"] = Query("requests"),
+    order: Literal["desc", "asc"] = Query("desc"),
+    limit: int = Query(10, ge=1, le=100),
+    offset: int = Query(0, ge=0),
+    provider_name: str | None = Query(None),
+    model: str | None = Query(None),
+) -> Any:
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
+    )
+    adapter = AdminModelLeaderboardAdapter(
+        time_range=time_range,
+        metric=metric,
+        order=order,
+        limit=limit,
+        offset=offset,
+        provider_name=provider_name,
+        model=model,
+    )
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
--- a/src/api/admin/stats/performance.py
+++ b/src/api/admin/stats/performance.py
@@ -0,0 +1,85 @@
+"""Admin performance stats routes."""
+
+from __future__ import annotations
+
+from datetime import date, timezone
+from typing import Any
+
+from fastapi import APIRouter, Depends, Query, Request
+from sqlalchemy.orm import Session
+
+from src.api.base.admin_adapter import AdminApiAdapter
+from src.api.base.context import ApiRequestContext
+from src.database import get_db
+from src.models.database import StatsDaily
+from src.services.system.stats_aggregator import StatsAggregatorService
+from src.services.system.time_range import TimeRangeParams
+
+from .common import _apply_admin_default_range, _build_time_range_params, pipeline
+
+router = APIRouter()
+
+
+class AdminPercentilesAdapter(AdminApiAdapter):
+    def __init__(self, time_range: TimeRangeParams | None) -> None:
+        self.time_range = _apply_admin_default_range(time_range)
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        if not self.time_range:
+            return []
+
+        time_range = self.time_range
+        is_utc = (time_range.timezone in {None, "UTC"}) and time_range.tz_offset_minutes == 0
+
+        if is_utc:
+            start_utc, end_utc = time_range.to_utc_datetime_range()
+            rows = (
+                context.db.query(StatsDaily)
+                .filter(StatsDaily.date >= start_utc, StatsDaily.date < end_utc)
+                .order_by(StatsDaily.date.asc())
+                .all()
+            )
+            result = []
+            for row in rows:
+                date_str = (
+                    row.date.astimezone(timezone.utc).date().isoformat()
+                    if row.date.tzinfo
+                    else row.date.date().isoformat()
+                )
+                result.append(
+                    {
+                        "date": date_str,
+                        "p50_response_time_ms": row.p50_response_time_ms,
+                        "p90_response_time_ms": row.p90_response_time_ms,
+                        "p99_response_time_ms": row.p99_response_time_ms,
+                        "p50_first_byte_time_ms": row.p50_first_byte_time_ms,
+                        "p90_first_byte_time_ms": row.p90_first_byte_time_ms,
+                        "p99_first_byte_time_ms": row.p99_first_byte_time_ms,
+                    }
+                )
+            return result
+
+        result = []
+        for local_date, day_start_utc, day_end_utc in time_range.get_local_day_hours():
+            percentiles = StatsAggregatorService.compute_daily_percentiles(
+                context.db, day_start_utc, day_end_utc
+            )
+            result.append({"date": local_date.isoformat(), **percentiles})
+        return result
+
+
+@router.get("/performance/percentiles")
+async def get_percentiles(
+    request: Request,
+    db: Session = Depends(get_db),
+    start_date: date | None = Query(None),
+    end_date: date | None = Query(None),
+    preset: str | None = Query(None),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+) -> Any:
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
+    )
+    adapter = AdminPercentilesAdapter(time_range=time_range)
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
--- a/src/api/admin/stats/quota.py
+++ b/src/api/admin/stats/quota.py
@@ -0,0 +1,83 @@
+"""Admin quota usage stats routes."""
+
+from __future__ import annotations
+
+from datetime import datetime, timedelta, timezone
+from typing import Any
+
+from fastapi import APIRouter, Depends, Request
+from sqlalchemy.orm import Session
+
+from src.api.base.admin_adapter import AdminApiAdapter
+from src.api.base.context import ApiRequestContext
+from src.core.enums import ProviderBillingType
+from src.database import get_db
+from src.models.database import Provider
+
+from .common import pipeline
+
+router = APIRouter()
+
+
+class AdminQuotaUsageAdapter(AdminApiAdapter):
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        db = context.db
+        providers = (
+            db.query(Provider)
+            .filter(
+                (Provider.billing_type == ProviderBillingType.MONTHLY_QUOTA)
+                | (Provider.monthly_quota_usd.isnot(None))
+            )
+            .all()
+        )
+        now = datetime.now(timezone.utc)
+
+        result = []
+        for provider in providers:
+            quota = provider.monthly_quota_usd or 0.0
+            used = float(provider.monthly_used_usd or 0.0)
+            remaining = max(quota - used, 0.0)
+            usage_percent = round((used / quota) * 100, 2) if quota > 0 else 0.0
+
+            reset_at = provider.quota_last_reset_at
+            if reset_at:
+                days_elapsed = max(1, (now - reset_at).days)
+            else:
+                days_elapsed = max(1, now.day - 1)
+
+            daily_rate = used / days_elapsed if used > 0 else 0.0
+            estimated_exhaust_at = None
+            if daily_rate > 0 and remaining > 0:
+                estimated_exhaust_at = now + timedelta(days=remaining / daily_rate)
+            if provider.quota_expires_at:
+                if not estimated_exhaust_at or provider.quota_expires_at < estimated_exhaust_at:
+                    estimated_exhaust_at = provider.quota_expires_at
+
+            result.append(
+                {
+                    "id": provider.id,
+                    "name": provider.name,
+                    "quota_usd": float(quota),
+                    "used_usd": float(used),
+                    "remaining_usd": float(remaining),
+                    "usage_percent": usage_percent,
+                    "quota_expires_at": (
+                        provider.quota_expires_at.isoformat() if provider.quota_expires_at else None
+                    ),
+                    "estimated_exhaust_at": (
+                        estimated_exhaust_at.isoformat() if estimated_exhaust_at else None
+                    ),
+                }
+            )
+
+        result.sort(key=lambda x: x["usage_percent"], reverse=True)
+        return {"providers": result}
+
+
+@router.get("/providers/quota-usage")
+async def get_quota_usage(
+    request: Request,
+    db: Session = Depends(get_db),
+) -> Any:
+    adapter = AdminQuotaUsageAdapter()
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
--- a/src/api/admin/stats/routes.py
+++ b/src/api/admin/stats/routes.py
@@ -0,0 +1,5 @@
+"""Admin stats routes (compat export)."""
+
+from . import router
+
+__all__ = ["router"]
--- a/src/api/admin/stats/time_series.py
+++ b/src/api/admin/stats/time_series.py
@@ -0,0 +1,75 @@
+"""Admin time series stats routes."""
+
+from __future__ import annotations
+
+from datetime import date
+from typing import Any, Literal
+
+from fastapi import APIRouter, Depends, HTTPException, Query, Request
+from sqlalchemy.orm import Session
+
+from src.api.base.admin_adapter import AdminApiAdapter
+from src.api.base.context import ApiRequestContext
+from src.database import get_db
+from src.services.system.stats_aggregator import TimeSeriesFilter, query_time_series
+from src.services.system.time_range import TimeRangeParams
+
+from .common import _apply_admin_default_range, _build_time_range_params, pipeline
+
+router = APIRouter()
+
+
+class AdminTimeSeriesAdapter(AdminApiAdapter):
+    def __init__(
+        self,
+        time_range: TimeRangeParams | None,
+        user_id: str | None,
+        model: str | None,
+        provider_name: str | None,
+    ) -> None:
+        self.time_range = _apply_admin_default_range(time_range)
+        self.user_id = user_id
+        self.model = model
+        self.provider_name = provider_name
+
+    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
+        if not self.time_range:
+            return []
+        try:
+            return query_time_series(
+                context.db,
+                self.time_range,
+                filters=TimeSeriesFilter(
+                    user_id=self.user_id, model=self.model, provider_name=self.provider_name
+                ),
+            )
+        except ValueError as exc:
+            raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+
+@router.get("/time-series")
+async def get_time_series(
+    request: Request,
+    db: Session = Depends(get_db),
+    start_date: date | None = Query(None),
+    end_date: date | None = Query(None),
+    preset: str | None = Query(None),
+    granularity: Literal["hour", "day", "week", "month"] = Query("day"),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(0),
+    user_id: str | None = Query(None),
+    model: str | None = Query(None),
+    provider_name: str | None = Query(None),
+) -> Any:
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
+    )
+    if time_range:
+        time_range.granularity = granularity
+    adapter = AdminTimeSeriesAdapter(
+        time_range=time_range,
+        user_id=user_id,
+        model=model,
+        provider_name=provider_name,
+    )
+    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)
--- a/src/api/admin/usage/routes.py
+++ b/src/api/admin/usage/routes.py
@@ -4,11 +4,11 @@ from __future__ import annotations

 from collections import defaultdict
 from dataclasses import dataclass
-from datetime import datetime, timedelta, timezone
+from datetime import date, datetime, timedelta, timezone
 from typing import Any

 from fastapi import APIRouter, Depends, HTTPException, Query, Request
-from sqlalchemy import func
+from sqlalchemy import case, func
 from sqlalchemy.orm import Session

 from src.api.base.admin_adapter import AdminApiAdapter
@@ -26,6 +26,8 @@ from src.models.database import (
    Usage,
    User,
 )
+from src.services.system.stats_aggregator import AggregatedStats, StatsFilter, query_stats_hybrid
+from src.services.system.time_range import TimeRangeParams
 from src.services.usage.service import UsageService
 from src.utils.cache_decorator import cache_result

@@ -34,22 +36,45 @@ pipeline = ApiRequestPipeline()


 def _apply_admin_default_range(
-    start_date: datetime | None, end_date: datetime | None
-) -> tuple[datetime | None, datetime | None]:
-    """
-    Apply a default time range for admin usage endpoints to protect DB from unbounded scans.
-
-    Enabled by setting ADMIN_USAGE_DEFAULT_DAYS>0.
-    """
-    if start_date is not None or end_date is not None:
-        return start_date, end_date
+    params: TimeRangeParams | None,
+) -> TimeRangeParams | None:
+    """Apply a default range to avoid unbounded scans."""
+    if params is not None:
+        return params

    days = int(getattr(config, "admin_usage_default_days", 0) or 0)
    if days <= 0:
-        return start_date, end_date
+        return None

-    now = datetime.now(timezone.utc)
-    return now - timedelta(days=days), now
+    today = datetime.now(timezone.utc).date()
+    start_date = today - timedelta(days=days - 1)
+    return TimeRangeParams(
+        start_date=start_date,
+        end_date=today,
+        timezone="UTC",
+        tz_offset_minutes=0,
+    ).validate_and_resolve()
+
+
+def _build_time_range_params(
+    start_date: date | None,
+    end_date: date | None,
+    preset: str | None,
+    timezone_name: str | None,
+    tz_offset_minutes: int | None,
+) -> TimeRangeParams | None:
+    if not preset and start_date is None and end_date is None:
+        return None
+    try:
+        return TimeRangeParams(
+            start_date=start_date,
+            end_date=end_date,
+            preset=preset,
+            timezone=timezone_name,
+            tz_offset_minutes=tz_offset_minutes or 0,
+        ).validate_and_resolve()
+    except Exception as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc


 # ==================== RESTful Routes ====================
@@ -61,8 +86,11 @@ async def get_usage_aggregation(
    group_by: str = Query(
        ..., description="Aggregation dimension: model, user, provider, or api_format"
    ),
-    start_date: datetime | None = None,
-    end_date: datetime | None = None,
+    start_date: date | None = None,
+    end_date: date | None = None,
+    preset: str | None = None,
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = None,
    limit: int = Query(20, ge=1, le=100),
    db: Session = Depends(get_db),
 ) -> Any:
@@ -83,16 +111,18 @@ async def get_usage_aggregation(
    - 按提供商聚合时：provider_id, provider, request_count, total_tokens, total_cost, actual_cost, avg_response_time_ms, success_rate, error_count
    - 按 API 格式聚合时：api_format, request_count, total_tokens, total_cost, actual_cost, avg_response_time_ms
    """
+    time_range = _apply_admin_default_range(
+        _build_time_range_params(start_date, end_date, preset, timezone_name, tz_offset_minutes)
+    )
+
    if group_by == "model":
-        adapter = AdminUsageByModelAdapter(start_date=start_date, end_date=end_date, limit=limit)
+        adapter = AdminUsageByModelAdapter(time_range=time_range, limit=limit)
    elif group_by == "user":
-        adapter = AdminUsageByUserAdapter(start_date=start_date, end_date=end_date, limit=limit)
+        adapter = AdminUsageByUserAdapter(time_range=time_range, limit=limit)
    elif group_by == "provider":
-        adapter = AdminUsageByProviderAdapter(start_date=start_date, end_date=end_date, limit=limit)
+        adapter = AdminUsageByProviderAdapter(time_range=time_range, limit=limit)
    elif group_by == "api_format":
-        adapter = AdminUsageByApiFormatAdapter(
-            start_date=start_date, end_date=end_date, limit=limit
-        )
+        adapter = AdminUsageByApiFormatAdapter(time_range=time_range, limit=limit)
    else:
        raise HTTPException(
            status_code=400,
@@ -104,8 +134,11 @@ async def get_usage_aggregation(
@router.get("/stats")
 async def get_usage_stats(
    request: Request,
-    start_date: datetime | None = None,
-    end_date: datetime | None = None,
+    start_date: date | None = None,
+    end_date: date | None = None,
+    preset: str | None = None,
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = None,
    db: Session = Depends(get_db),
 ) -> Any:
    """
@@ -127,7 +160,10 @@ async def get_usage_stats(
    - `error_rate`: 错误率（百分比）
    - `cache_stats`: 缓存统计信息（cache_creation_tokens, cache_read_tokens, cache_creation_cost, cache_read_cost）
    """
-    adapter = AdminUsageStatsAdapter(start_date=start_date, end_date=end_date)
+    time_range = _apply_admin_default_range(
+        _build_time_range_params(start_date, end_date, preset, timezone_name, tz_offset_minutes)
+    )
+    adapter = AdminUsageStatsAdapter(time_range=time_range)
    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)


@@ -151,13 +187,17 @@ async def get_activity_heatmap(
@router.get("/records")
 async def get_usage_records(
    request: Request,
-    start_date: datetime | None = None,
-    end_date: datetime | None = None,
+    start_date: date | None = None,
+    end_date: date | None = None,
+    preset: str | None = None,
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = None,
    search: str | None = None,  # 通用搜索：用户名、密钥名、模型名、提供商名
    user_id: str | None = None,
    username: str | None = None,
    model: str | None = None,
    provider: str | None = None,
+    api_format: str | None = None,  # API 格式筛选（如 openai:chat, claude:chat）
    status: str | None = None,  # stream, standard, error
    limit: int = Query(100, ge=1, le=500),
    offset: int = Query(0, ge=0),
@@ -176,6 +216,7 @@ async def get_usage_records(
    - `username`: 可选，用户名模糊搜索
    - `model`: 可选，模型名模糊搜索
    - `provider`: 可选，提供商名称搜索
+    - `api_format`: 可选，API 格式筛选（如 openai:chat, claude:chat）
    - `status`: 可选，状态筛选（stream: 流式请求，standard: 标准请求，error: 错误请求，pending: 等待中，streaming: 流式中，completed: 已完成，failed: 失败，active: 活跃请求）
    - `limit`: 返回数量限制，默认 100，最大 500
    - `offset`: 分页偏移量，默认 0
@@ -190,14 +231,17 @@ async def get_usage_records(
    - `limit`: 当前分页限制
    - `offset`: 当前分页偏移量
    """
+    time_range = _apply_admin_default_range(
+        _build_time_range_params(start_date, end_date, preset, timezone_name, tz_offset_minutes)
+    )
    adapter = AdminUsageRecordsAdapter(
-        start_date=start_date,
-        end_date=end_date,
+        time_range=time_range,
        search=search,
        user_id=user_id,
        username=username,
        model=model,
        provider=provider,
+        api_format=api_format,
        status=status,
        limit=limit,
        offset=offset,
@@ -288,73 +332,87 @@ async def get_usage_detail(


 class AdminUsageStatsAdapter(AdminApiAdapter):
-    def __init__(self, start_date: datetime | None, end_date: datetime | None):
-        self.start_date, self.end_date = _apply_admin_default_range(start_date, end_date)
+    def __init__(self, time_range: TimeRangeParams | None):
+        self.time_range = _apply_admin_default_range(time_range)
+        self.start_date = self.time_range.start_date if self.time_range else None
+        self.end_date = self.time_range.end_date if self.time_range else None
+        self.preset = self.time_range.preset if self.time_range else None
+        self.timezone = self.time_range.timezone if self.time_range else None
+        self.tz_offset_minutes = self.time_range.tz_offset_minutes if self.time_range else None

    @cache_result(
        key_prefix="admin:usage:stats",
        ttl=CacheTTL.ADMIN_USAGE_AGGREGATION,
        user_specific=False,
-        vary_by=["start_date", "end_date"],
+        vary_by=["start_date", "end_date", "preset", "timezone", "tz_offset_minutes"],
    )
    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
-        # Perf: use a single aggregate query (avoid 3 full scans).
-        from sqlalchemy import case
-
        db = context.db
-        query = db.query(Usage)
-        if self.start_date:
-            query = query.filter(Usage.created_at >= self.start_date)
-        if self.end_date:
-            query = query.filter(Usage.created_at <= self.end_date)
-
-        stats = query.with_entities(
-            func.count(Usage.id).label("total_requests"),
-            func.sum(Usage.total_tokens).label("total_tokens"),
-            func.sum(Usage.total_cost_usd).label("total_cost"),
-            func.sum(Usage.actual_total_cost_usd).label("total_actual_cost"),
-            func.avg(Usage.response_time_ms).label("avg_response_time_ms"),
-            func.sum(Usage.cache_creation_input_tokens).label("cache_creation_tokens"),
-            func.sum(Usage.cache_read_input_tokens).label("cache_read_tokens"),
-            func.sum(Usage.cache_creation_cost_usd).label("cache_creation_cost"),
-            func.sum(Usage.cache_read_cost_usd).label("cache_read_cost"),
-            func.sum(
-                case(
-                    (
-                        (Usage.status_code >= 400) | (Usage.error_message.isnot(None)),
-                        1,
-                    ),
-                    else_=0,
-                )
-            ).label("error_count"),
-        ).first()
+        if self.time_range:
+            stats = query_stats_hybrid(db, self.time_range, filters=StatsFilter())
+        else:
+            error_cond = (Usage.status_code >= 400) | (Usage.error_message.isnot(None))
+            row = db.query(
+                func.count(Usage.id).label("total_requests"),
+                func.sum(case((error_cond, 1), else_=0)).label("error_requests"),
+                func.sum(Usage.input_tokens).label("input_tokens"),
+                func.sum(Usage.output_tokens).label("output_tokens"),
+                func.sum(Usage.cache_creation_input_tokens).label("cache_creation_tokens"),
+                func.sum(Usage.cache_read_input_tokens).label("cache_read_tokens"),
+                func.sum(Usage.cache_creation_cost_usd).label("cache_creation_cost"),
+                func.sum(Usage.cache_read_cost_usd).label("cache_read_cost"),
+                func.sum(Usage.total_cost_usd).label("total_cost"),
+                func.sum(Usage.actual_total_cost_usd).label("actual_total_cost"),
+                func.sum(Usage.response_time_ms).label("total_response_time_ms"),
+            ).first()
+            total_requests = int(getattr(row, "total_requests", 0) or 0)
+            error_requests = int(getattr(row, "error_requests", 0) or 0)
+            stats = AggregatedStats(
+                total_requests=total_requests,
+                success_requests=total_requests - error_requests,
+                error_requests=error_requests,
+                input_tokens=int(getattr(row, "input_tokens", 0) or 0),
+                output_tokens=int(getattr(row, "output_tokens", 0) or 0),
+                cache_creation_tokens=int(getattr(row, "cache_creation_tokens", 0) or 0),
+                cache_read_tokens=int(getattr(row, "cache_read_tokens", 0) or 0),
+                cache_creation_cost=float(getattr(row, "cache_creation_cost", 0) or 0.0),
+                cache_read_cost=float(getattr(row, "cache_read_cost", 0) or 0.0),
+                total_cost=float(getattr(row, "total_cost", 0) or 0.0),
+                actual_total_cost=float(getattr(row, "actual_total_cost", 0) or 0.0),
+                total_response_time_ms=float(getattr(row, "total_response_time_ms", 0) or 0.0),
+            )

        context.add_audit_metadata(
            action="usage_stats",
            start_date=self.start_date.isoformat() if self.start_date else None,
            end_date=self.end_date.isoformat() if self.end_date else None,
+            preset=self.preset,
+            timezone=self.timezone,
        )
-
-        total_requests = int(stats.total_requests or 0) if stats else 0
-        avg_response_time_ms = float(stats.avg_response_time_ms or 0) if stats else 0
-        avg_response_time = avg_response_time_ms / 1000.0
-        error_count = int(stats.error_count or 0) if stats else 0
+        total_requests = stats.total_requests
+        avg_response_time = stats.avg_response_time_ms / 1000.0
+        error_count = stats.error_requests

        return {
            "total_requests": total_requests,
-            "total_tokens": int(stats.total_tokens or 0) if stats else 0,
-            "total_cost": float(stats.total_cost or 0) if stats else 0,
-            "total_actual_cost": float(stats.total_actual_cost or 0) if stats else 0,
+            "total_tokens": int(
+                stats.input_tokens
+                + stats.output_tokens
+                + stats.cache_creation_tokens
+                + stats.cache_read_tokens
+            ),
+            "total_cost": float(stats.total_cost),
+            "total_actual_cost": float(stats.actual_total_cost),
            "avg_response_time": round(avg_response_time, 2),
            "error_count": error_count,
            "error_rate": (
                round((error_count / total_requests) * 100, 2) if total_requests > 0 else 0
            ),
            "cache_stats": {
-                "cache_creation_tokens": (int(stats.cache_creation_tokens or 0) if stats else 0),
-                "cache_read_tokens": int(stats.cache_read_tokens or 0) if stats else 0,
-                "cache_creation_cost": (float(stats.cache_creation_cost or 0) if stats else 0),
-                "cache_read_cost": float(stats.cache_read_cost or 0) if stats else 0,
+                "cache_creation_tokens": int(stats.cache_creation_tokens),
+                "cache_read_tokens": int(stats.cache_read_tokens),
+                "cache_creation_cost": float(stats.cache_creation_cost),
+                "cache_read_cost": float(stats.cache_read_cost),
            },
        }

@@ -373,15 +431,20 @@ class AdminActivityHeatmapAdapter(AdminApiAdapter):


 class AdminUsageByModelAdapter(AdminApiAdapter):
-    def __init__(self, start_date: datetime | None, end_date: datetime | None, limit: int):
-        self.start_date, self.end_date = _apply_admin_default_range(start_date, end_date)
+    def __init__(self, time_range: TimeRangeParams | None, limit: int):
+        self.time_range = _apply_admin_default_range(time_range)
+        self.start_date = self.time_range.start_date if self.time_range else None
+        self.end_date = self.time_range.end_date if self.time_range else None
+        self.preset = self.time_range.preset if self.time_range else None
+        self.timezone = self.time_range.timezone if self.time_range else None
+        self.tz_offset_minutes = self.time_range.tz_offset_minutes if self.time_range else None
        self.limit = limit

    @cache_result(
        key_prefix="admin:usage:agg:model",
        ttl=CacheTTL.ADMIN_USAGE_AGGREGATION,
        user_specific=False,
-        vary_by=["start_date", "end_date", "limit"],
+        vary_by=["start_date", "end_date", "preset", "timezone", "tz_offset_minutes", "limit"],
    )
    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
        db = context.db
@@ -397,10 +460,9 @@ class AdminUsageByModelAdapter(AdminApiAdapter):
        # 过滤掉 unknown/pending provider_name（请求未到达任何提供商）
        query = query.filter(Usage.provider_name.notin_(["unknown", "pending"]))

-        if self.start_date:
-            query = query.filter(Usage.created_at >= self.start_date)
-        if self.end_date:
-            query = query.filter(Usage.created_at <= self.end_date)
+        if self.time_range:
+            start_utc, end_utc = self.time_range.to_utc_datetime_range()
+            query = query.filter(Usage.created_at >= start_utc, Usage.created_at < end_utc)

        query = query.group_by(Usage.model).order_by(func.count(Usage.id).desc()).limit(self.limit)
        stats = query.all()
@@ -408,6 +470,8 @@ class AdminUsageByModelAdapter(AdminApiAdapter):
            action="usage_by_model",
            start_date=self.start_date.isoformat() if self.start_date else None,
            end_date=self.end_date.isoformat() if self.end_date else None,
+            preset=self.preset,
+            timezone=self.timezone,
            limit=self.limit,
            result_count=len(stats),
        )
@@ -425,15 +489,20 @@ class AdminUsageByModelAdapter(AdminApiAdapter):


 class AdminUsageByUserAdapter(AdminApiAdapter):
-    def __init__(self, start_date: datetime | None, end_date: datetime | None, limit: int):
-        self.start_date, self.end_date = _apply_admin_default_range(start_date, end_date)
+    def __init__(self, time_range: TimeRangeParams | None, limit: int):
+        self.time_range = _apply_admin_default_range(time_range)
+        self.start_date = self.time_range.start_date if self.time_range else None
+        self.end_date = self.time_range.end_date if self.time_range else None
+        self.preset = self.time_range.preset if self.time_range else None
+        self.timezone = self.time_range.timezone if self.time_range else None
+        self.tz_offset_minutes = self.time_range.tz_offset_minutes if self.time_range else None
        self.limit = limit

    @cache_result(
        key_prefix="admin:usage:agg:user",
        ttl=CacheTTL.ADMIN_USAGE_AGGREGATION,
        user_specific=False,
-        vary_by=["start_date", "end_date", "limit"],
+        vary_by=["start_date", "end_date", "preset", "timezone", "tz_offset_minutes", "limit"],
    )
    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
        db = context.db
@@ -450,10 +519,9 @@ class AdminUsageByUserAdapter(AdminApiAdapter):
            .group_by(User.id, User.email, User.username)
        )

-        if self.start_date:
-            query = query.filter(Usage.created_at >= self.start_date)
-        if self.end_date:
-            query = query.filter(Usage.created_at <= self.end_date)
+        if self.time_range:
+            start_utc, end_utc = self.time_range.to_utc_datetime_range()
+            query = query.filter(Usage.created_at >= start_utc, Usage.created_at < end_utc)

        query = query.order_by(func.count(Usage.id).desc()).limit(self.limit)
        stats = query.all()
@@ -462,6 +530,8 @@ class AdminUsageByUserAdapter(AdminApiAdapter):
            action="usage_by_user",
            start_date=self.start_date.isoformat() if self.start_date else None,
            end_date=self.end_date.isoformat() if self.end_date else None,
+            preset=self.preset,
+            timezone=self.timezone,
            limit=self.limit,
            result_count=len(stats),
        )
@@ -480,15 +550,20 @@ class AdminUsageByUserAdapter(AdminApiAdapter):


 class AdminUsageByProviderAdapter(AdminApiAdapter):
-    def __init__(self, start_date: datetime | None, end_date: datetime | None, limit: int):
-        self.start_date, self.end_date = _apply_admin_default_range(start_date, end_date)
+    def __init__(self, time_range: TimeRangeParams | None, limit: int):
+        self.time_range = _apply_admin_default_range(time_range)
+        self.start_date = self.time_range.start_date if self.time_range else None
+        self.end_date = self.time_range.end_date if self.time_range else None
+        self.preset = self.time_range.preset if self.time_range else None
+        self.timezone = self.time_range.timezone if self.time_range else None
+        self.tz_offset_minutes = self.time_range.tz_offset_minutes if self.time_range else None
        self.limit = limit

    @cache_result(
        key_prefix="admin:usage:agg:provider",
        ttl=CacheTTL.ADMIN_USAGE_AGGREGATION,
        user_specific=False,
-        vary_by=["start_date", "end_date", "limit"],
+        vary_by=["start_date", "end_date", "preset", "timezone", "tz_offset_minutes", "limit"],
    )
    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
        db = context.db
@@ -511,10 +586,12 @@ class AdminUsageByProviderAdapter(AdminApiAdapter):
            RequestCandidate.status.in_(["success", "failed"]),
        )

-        if self.start_date:
-            attempt_query = attempt_query.filter(RequestCandidate.created_at >= self.start_date)
-        if self.end_date:
-            attempt_query = attempt_query.filter(RequestCandidate.created_at <= self.end_date)
+        if self.time_range:
+            start_utc, end_utc = self.time_range.to_utc_datetime_range()
+            attempt_query = attempt_query.filter(
+                RequestCandidate.created_at >= start_utc,
+                RequestCandidate.created_at < end_utc,
+            )

        attempt_stats = (
            attempt_query.group_by(RequestCandidate.provider_id)
@@ -537,10 +614,11 @@ class AdminUsageByProviderAdapter(AdminApiAdapter):
            Usage.status.notin_(["pending", "streaming"]),
        )

-        if self.start_date:
-            usage_query = usage_query.filter(Usage.created_at >= self.start_date)
-        if self.end_date:
-            usage_query = usage_query.filter(Usage.created_at <= self.end_date)
+        if self.time_range:
+            start_utc, end_utc = self.time_range.to_utc_datetime_range()
+            usage_query = usage_query.filter(
+                Usage.created_at >= start_utc, Usage.created_at < end_utc
+            )

        usage_stats = usage_query.group_by(Usage.provider_id).all()
        usage_map = {str(u.provider_id): u for u in usage_stats}
@@ -566,6 +644,8 @@ class AdminUsageByProviderAdapter(AdminApiAdapter):
            action="usage_by_provider",
            start_date=self.start_date.isoformat() if self.start_date else None,
            end_date=self.end_date.isoformat() if self.end_date else None,
+            preset=self.preset,
+            timezone=self.timezone,
            limit=self.limit,
            result_count=len(attempt_stats),
        )
@@ -599,15 +679,20 @@ class AdminUsageByProviderAdapter(AdminApiAdapter):


 class AdminUsageByApiFormatAdapter(AdminApiAdapter):
-    def __init__(self, start_date: datetime | None, end_date: datetime | None, limit: int):
-        self.start_date, self.end_date = _apply_admin_default_range(start_date, end_date)
+    def __init__(self, time_range: TimeRangeParams | None, limit: int):
+        self.time_range = _apply_admin_default_range(time_range)
+        self.start_date = self.time_range.start_date if self.time_range else None
+        self.end_date = self.time_range.end_date if self.time_range else None
+        self.preset = self.time_range.preset if self.time_range else None
+        self.timezone = self.time_range.timezone if self.time_range else None
+        self.tz_offset_minutes = self.time_range.tz_offset_minutes if self.time_range else None
        self.limit = limit

    @cache_result(
        key_prefix="admin:usage:agg:api_format",
        ttl=CacheTTL.ADMIN_USAGE_AGGREGATION,
        user_specific=False,
-        vary_by=["start_date", "end_date", "limit"],
+        vary_by=["start_date", "end_date", "preset", "timezone", "tz_offset_minutes", "limit"],
    )
    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
        db = context.db
@@ -626,10 +711,9 @@ class AdminUsageByApiFormatAdapter(AdminApiAdapter):
        # 只统计有 api_format 的记录
        query = query.filter(Usage.api_format.isnot(None))

-        if self.start_date:
-            query = query.filter(Usage.created_at >= self.start_date)
-        if self.end_date:
-            query = query.filter(Usage.created_at <= self.end_date)
+        if self.time_range:
+            start_utc, end_utc = self.time_range.to_utc_datetime_range()
+            query = query.filter(Usage.created_at >= start_utc, Usage.created_at < end_utc)

        query = (
            query.group_by(Usage.api_format).order_by(func.count(Usage.id).desc()).limit(self.limit)
@@ -640,6 +724,8 @@ class AdminUsageByApiFormatAdapter(AdminApiAdapter):
            action="usage_by_api_format",
            start_date=self.start_date.isoformat() if self.start_date else None,
            end_date=self.end_date.isoformat() if self.end_date else None,
+            preset=self.preset,
+            timezone=self.timezone,
            limit=self.limit,
            result_count=len(stats),
        )
@@ -660,23 +746,29 @@ class AdminUsageByApiFormatAdapter(AdminApiAdapter):
 class AdminUsageRecordsAdapter(AdminApiAdapter):
    def __init__(
        self,
-        start_date: datetime | None,
-        end_date: datetime | None,
+        time_range: TimeRangeParams | None,
        search: str | None,
        user_id: str | None,
        username: str | None,
        model: str | None,
        provider: str | None,
+        api_format: str | None,
        status: str | None,
        limit: int,
        offset: int,
    ):
-        self.start_date, self.end_date = _apply_admin_default_range(start_date, end_date)
+        self.time_range = _apply_admin_default_range(time_range)
+        self.start_date = self.time_range.start_date if self.time_range else None
+        self.end_date = self.time_range.end_date if self.time_range else None
+        self.preset = self.time_range.preset if self.time_range else None
+        self.timezone = self.time_range.timezone if self.time_range else None
+        self.tz_offset_minutes = self.time_range.tz_offset_minutes if self.time_range else None
        self.search = search
        self.user_id = user_id
        self.username = username
        self.model = model
        self.provider = provider
+        self.api_format = api_format
        self.status = status
        self.limit = limit
        self.offset = offset
@@ -688,11 +780,15 @@ class AdminUsageRecordsAdapter(AdminApiAdapter):
        vary_by=[
            "start_date",
            "end_date",
+            "preset",
+            "timezone",
+            "tz_offset_minutes",
            "search",
            "user_id",
            "username",
            "model",
            "provider",
+            "api_format",
            "status",
            "limit",
            "offset",
@@ -748,6 +844,9 @@ class AdminUsageRecordsAdapter(AdminApiAdapter):
            # 提供商筛选：前端为下拉框精确值，使用精确匹配以启用索引
            # 如需模糊搜索，请使用 search 参数。
            query = query.filter(Provider.name == self.provider)
+        if self.api_format:
+            # API 格式筛选：精确匹配（大小写不敏感）
+            query = query.filter(func.lower(Usage.api_format) == self.api_format.lower())
        if self.status:
            # 状态筛选
            # 旧的筛选值（基于 is_stream 和 status_code）：stream, standard, error
@@ -773,10 +872,9 @@ class AdminUsageRecordsAdapter(AdminApiAdapter):
            elif self.status == "active":
                # 活跃请求：pending 或 streaming 状态
                query = query.filter(Usage.status.in_(["pending", "streaming"]))
-        if self.start_date:
-            query = query.filter(Usage.created_at >= self.start_date)
-        if self.end_date:
-            query = query.filter(Usage.created_at <= self.end_date)
+        if self.time_range:
+            start_utc, end_utc = self.time_range.to_utc_datetime_range()
+            query = query.filter(Usage.created_at >= start_utc, Usage.created_at < end_utc)

        # Perf: avoid Query.count() building a subquery selecting many columns
        total = int(query.with_entities(func.count(Usage.id)).scalar() or 0)
@@ -875,6 +973,8 @@ class AdminUsageRecordsAdapter(AdminApiAdapter):
            action="usage_records",
            start_date=self.start_date.isoformat() if self.start_date else None,
            end_date=self.end_date.isoformat() if self.end_date else None,
+            preset=self.preset,
+            timezone=self.timezone,
            search=self.search,
            user_id=self.user_id,
            username=self.username,
--- a/src/api/dashboard/routes.py
+++ b/src/api/dashboard/routes.py
@@ -3,7 +3,7 @@
 from __future__ import annotations

 from dataclasses import dataclass
-from datetime import datetime, timedelta, timezone
+from datetime import date, datetime, timedelta, timezone
 from typing import Any

 from fastapi import APIRouter, Depends, HTTPException, Query, Request
@@ -27,7 +27,12 @@ from src.models.database import (
    Usage,
 )
 from src.models.database import User as DBUser
-from src.services.system.stats_aggregator import StatsAggregatorService
+from src.services.system.stats_aggregator import (
+    StatsAggregatorService,
+    TimeSeriesFilter,
+    query_time_series,
+)
+from src.services.system.time_range import TimeRangeParams
 from src.utils.cache_decorator import cache_result

 router = APIRouter(prefix="/api/dashboard", tags=["Dashboard"])
@@ -55,6 +60,29 @@ def format_tokens(num: int) -> str:
        return f"{millions:.2f}M"


+def _build_time_range_params(
+    start_date: date | None,
+    end_date: date | None,
+    preset: str | None,
+    timezone_name: str | None,
+    tz_offset_minutes: int | None,
+    granularity: str | None = None,
+) -> TimeRangeParams | None:
+    if not preset and start_date is None and end_date is None:
+        return None
+    try:
+        return TimeRangeParams(
+            start_date=start_date,
+            end_date=end_date,
+            preset=preset,
+            granularity=granularity or "day",
+            timezone=timezone_name,
+            tz_offset_minutes=tz_offset_minutes or 0,
+        ).validate_and_resolve()
+    except Exception as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+
@router.get("/stats")
 async def get_dashboard_stats(request: Request, db: Session = Depends(get_db)) -> Any:
    """
@@ -136,6 +164,12 @@ async def get_provider_status(request: Request, db: Session = Depends(get_db)) -
 async def get_daily_stats(
    request: Request,
    days: int = Query(7, ge=1, le=30),
+    start_date: date | None = Query(None, description="开始日期（YYYY-MM-DD）"),
+    end_date: date | None = Query(None, description="结束日期（YYYY-MM-DD）"),
+    preset: str | None = Query(None, description="时间预设（today/last7days 等）"),
+    granularity: str = Query("day", description="时间粒度: hour/day/week/month"),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(None, description="时区偏移（分钟）"),
    db: Session = Depends(get_db),
 ) -> Any:
    """
@@ -160,7 +194,30 @@ async def get_daily_stats(
    - `model_summary`: 模型使用汇总，按费用排序
    - `period`: 统计周期信息（start_date, end_date, days）
    """
-    adapter = DashboardDailyStatsAdapter(days=days)
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes, granularity
+    )
+    if time_range is None:
+        # fallback to days
+        tmp = TimeRangeParams(
+            start_date=None,
+            end_date=None,
+            preset="today",
+            granularity=granularity,
+            timezone=timezone_name,
+            tz_offset_minutes=tz_offset_minutes or 0,
+        )
+        user_today = tmp._get_user_today()
+        start = user_today - timedelta(days=days - 1)
+        time_range = TimeRangeParams(
+            start_date=start,
+            end_date=user_today,
+            granularity=granularity,
+            timezone=timezone_name,
+            tz_offset_minutes=tz_offset_minutes or 0,
+        ).validate_and_resolve()
+
+    adapter = DashboardDailyStatsAdapter(time_range=time_range, days=days)
    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)


@@ -194,21 +251,12 @@ class AdminDashboardStatsAdapter(AdminApiAdapter):
    )
    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
        """管理员仪表盘统计 - 使用预聚合数据优化性能"""
-        from zoneinfo import ZoneInfo
-
-        from src.services.system.stats_aggregator import APP_TIMEZONE
-
        db = context.db
-        # 使用业务时区计算日期，与 stats_daily 表保持一致
-        app_tz = ZoneInfo(APP_TIMEZONE)
-        now_local = datetime.now(app_tz)
-        today_local = now_local.replace(hour=0, minute=0, second=0, microsecond=0)
-        # 转换为 UTC 用于与 stats_daily.date 比较（存储的是业务日期对应的 UTC 开始时间）
-        today = today_local.astimezone(timezone.utc)
-        yesterday = (today_local - timedelta(days=1)).astimezone(timezone.utc)
-        # 本月第一天（自然月）
-        month_start_local = today_local.replace(day=1)
-        month_start = month_start_local.astimezone(timezone.utc)
+        # 使用 UTC 日期，与 stats_daily.date 一致
+        now_utc = datetime.now(timezone.utc)
+        today = now_utc.replace(hour=0, minute=0, second=0, microsecond=0)
+        yesterday = today - timedelta(days=1)
+        month_start = today.replace(day=1)

        # ==================== 使用预聚合数据 ====================
        # 今日实时数据只查询一次，避免重复扫描 Usage 表
@@ -887,20 +935,169 @@ class DashboardProviderStatusAdapter(DashboardAdapter):
@dataclass
 class DashboardDailyStatsAdapter(DashboardAdapter):
    days: int
+    time_range: TimeRangeParams | None = None
+    start_date: date | None = None
+    end_date: date | None = None
+    preset: str | None = None
+    granularity: str | None = None
+    timezone: str | None = None
+    tz_offset_minutes: int | None = None
+
+    def __post_init__(self) -> None:
+        if self.time_range:
+            self.start_date = self.time_range.start_date
+            self.end_date = self.time_range.end_date
+            self.preset = self.time_range.preset
+            self.granularity = self.time_range.granularity
+            self.timezone = self.time_range.timezone
+            self.tz_offset_minutes = self.time_range.tz_offset_minutes

    @cache_result(
-        key_prefix="dashboard:daily:stats", ttl=CacheTTL.DASHBOARD_DAILY, user_specific=True
+        key_prefix="dashboard:daily:stats",
+        ttl=CacheTTL.DASHBOARD_DAILY,
+        user_specific=True,
+        vary_by=[
+            "start_date",
+            "end_date",
+            "preset",
+            "granularity",
+            "timezone",
+            "tz_offset_minutes",
+        ],
    )
    async def handle(self, context: ApiRequestContext) -> Any:  # type: ignore[override]
-        from zoneinfo import ZoneInfo
-
-        from src.services.system.stats_aggregator import APP_TIMEZONE
-
        db = context.db
        user = context.user
        is_admin = user.role == UserRole.ADMIN

+        if self.time_range:
+            try:
+                series = query_time_series(
+                    db,
+                    self.time_range,
+                    filters=TimeSeriesFilter(user_id=user.id) if not is_admin else None,
+                )
+            except ValueError as exc:
+                raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+            formatted = []
+            for item in series:
+                total_tokens = (
+                    item["input_tokens"]
+                    + item["output_tokens"]
+                    + item.get("cache_creation_tokens", 0)
+                    + item.get("cache_read_tokens", 0)
+                )
+                formatted.append(
+                    {
+                        "date": item["date"],
+                        "requests": item["total_requests"],
+                        "tokens": total_tokens,
+                        "cost": item["total_cost"],
+                        "avg_response_time": (item.get("avg_response_time_ms", 0.0) / 1000.0),
+                        "unique_models": 0,
+                        "unique_providers": 0,
+                        "fallback_count": 0,
+                    }
+                )
+
+            # Model summary (use Usage directly for now)
+            start_utc, end_utc = self.time_range.to_utc_datetime_range()
+            model_query = db.query(
+                Usage.model,
+                func.count(Usage.id).label("requests"),
+                func.sum(Usage.total_tokens).label("tokens"),
+                func.sum(Usage.total_cost_usd).label("cost"),
+            ).filter(Usage.created_at >= start_utc, Usage.created_at < end_utc)
+            if not is_admin:
+                model_query = model_query.filter(Usage.user_id == user.id)
+            model_stats = (
+                model_query.group_by(Usage.model)
+                .order_by(func.sum(Usage.total_cost_usd).desc())
+                .all()
+            )
+            model_summary = [
+                {
+                    "model": stat.model,
+                    "requests": stat.requests or 0,
+                    "tokens": int(stat.tokens or 0),
+                    "cost": float(stat.cost or 0),
+                    "avg_response_time": 0,
+                    "cost_per_request": float(stat.cost or 0) / max(stat.requests or 1, 1),
+                    "tokens_per_request": int(stat.tokens or 0) / max(stat.requests or 1, 1),
+                }
+                for stat in model_stats
+            ]
+
+            # Daily model breakdown (aligned to local days)
+            breakdown_map: dict[str, list[dict]] = {}
+            for local_date, day_start, day_end in self.time_range.get_local_day_hours():
+                day_query = db.query(
+                    Usage.model,
+                    func.count(Usage.id).label("requests"),
+                    func.sum(Usage.total_tokens).label("tokens"),
+                    func.sum(Usage.total_cost_usd).label("cost"),
+                ).filter(Usage.created_at >= day_start, Usage.created_at < day_end)
+                if not is_admin:
+                    day_query = day_query.filter(Usage.user_id == user.id)
+                day_stats = day_query.group_by(Usage.model).all()
+                breakdown_map[local_date.isoformat()] = [
+                    {
+                        "model": stat.model,
+                        "requests": stat.requests or 0,
+                        "tokens": int(stat.tokens or 0),
+                        "cost": float(stat.cost or 0),
+                    }
+                    for stat in day_stats
+                    if stat.model
+                ]
+
+            for item in formatted:
+                item["model_breakdown"] = breakdown_map.get(item["date"], [])
+
+            provider_summary = None
+            if is_admin:
+                provider_stats = (
+                    db.query(
+                        Usage.provider_name,
+                        func.count(Usage.id).label("requests"),
+                        func.sum(Usage.total_tokens).label("tokens"),
+                        func.sum(Usage.total_cost_usd).label("cost"),
+                    )
+                    .filter(Usage.created_at >= start_utc, Usage.created_at < end_utc)
+                    .group_by(Usage.provider_name)
+                    .all()
+                )
+                provider_summary = [
+                    {
+                        "provider": stat.provider_name or "Unknown",
+                        "requests": stat.requests or 0,
+                        "tokens": int(stat.tokens or 0),
+                        "cost": float(stat.cost or 0),
+                    }
+                    for stat in provider_stats
+                    if (stat.provider_name or "").lower() != "unknown"
+                ]
+                provider_summary.sort(key=lambda x: x["cost"], reverse=True)
+
+            result = {
+                "daily_stats": formatted,
+                "model_summary": model_summary,
+                "period": {
+                    "start_date": self.time_range.start_date.isoformat(),
+                    "end_date": self.time_range.end_date.isoformat(),
+                    "days": (self.time_range.end_date - self.time_range.start_date).days + 1,
+                },
+            }
+            if is_admin and provider_summary is not None:
+                result["provider_summary"] = provider_summary
+            return result
+
        # 使用业务时区计算日期，确保每日统计与业务日期一致
+        from zoneinfo import ZoneInfo
+
+        from src.services.system.stats_aggregator import APP_TIMEZONE
+
        app_tz = ZoneInfo(APP_TIMEZONE)
        now_local = datetime.now(app_tz)
        today_local = now_local.replace(hour=0, minute=0, second=0, microsecond=0)
--- a/src/api/user_me/routes.py
+++ b/src/api/user_me/routes.py
@@ -3,7 +3,7 @@
 from __future__ import annotations

 from dataclasses import dataclass
-from datetime import datetime, timezone
+from datetime import date, datetime, timedelta, timezone
 from typing import Any

 from fastapi import APIRouter, Depends, HTTPException, Query, Request
@@ -33,6 +33,7 @@ from src.models.api import (
    UpdateProfileRequest,
 )
 from src.models.database import ApiKey, GlobalModel, Model, Provider, Usage, User
+from src.services.system.time_range import TimeRangeParams
 from src.services.usage.service import UsageService
 from src.services.user.apikey import ApiKeyService
 from src.services.user.preference import PreferenceService
@@ -41,6 +42,27 @@ router = APIRouter(prefix="/api/users/me", tags=["User Profile"])
 pipeline = ApiRequestPipeline()


+def _build_time_range_params(
+    start_date: date | None,
+    end_date: date | None,
+    preset: str | None,
+    timezone_name: str | None,
+    tz_offset_minutes: int | None,
+) -> TimeRangeParams | None:
+    if not preset and start_date is None and end_date is None:
+        return None
+    try:
+        return TimeRangeParams(
+            start_date=start_date,
+            end_date=end_date,
+            preset=preset,
+            timezone=timezone_name,
+            tz_offset_minutes=tz_offset_minutes or 0,
+        ).validate_and_resolve()
+    except Exception as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+
@router.get("")
 async def get_my_profile(request: Request, db: Session = Depends(get_db)) -> Any:
    """
@@ -176,8 +198,11 @@ async def toggle_my_api_key(key_id: str, request: Request, db: Session = Depends
@router.get("/usage")
 async def get_my_usage(
    request: Request,
-    start_date: datetime | None = Query(None, description="开始时间（ISO 格式）"),
-    end_date: datetime | None = Query(None, description="结束时间（ISO 格式）"),
+    start_date: date | None = Query(None, description="开始日期（YYYY-MM-DD）"),
+    end_date: date | None = Query(None, description="结束日期（YYYY-MM-DD）"),
+    preset: str | None = Query(None, description="时间预设（today/last7days 等）"),
+    timezone_name: str | None = Query(None, alias="timezone"),
+    tz_offset_minutes: int | None = Query(None, description="时区偏移（分钟）"),
    search: str | None = Query(None, description="搜索关键词（密钥名、模型名）"),
    limit: int = Query(100, ge=1, le=200, description="每页记录数，默认100，最大200"),
    offset: int = Query(0, ge=0, le=2000, description="偏移量，用于分页，最大2000"),
@@ -197,9 +222,10 @@ async def get_my_usage(
    - `records`: 详细使用记录列表
    - `pagination`: 分页信息
    """
-    adapter = GetUsageAdapter(
-        start_date=start_date, end_date=end_date, search=search, limit=limit, offset=offset
+    time_range = _build_time_range_params(
+        start_date, end_date, preset, timezone_name, tz_offset_minutes
    )
+    adapter = GetUsageAdapter(time_range=time_range, search=search, limit=limit, offset=offset)
    return await pipeline.run(adapter=adapter, http_request=request, db=db, mode=adapter.mode)


@@ -728,8 +754,7 @@ class ToggleMyApiKeyAdapter(AuthenticatedApiAdapter):
 class GetUsageAdapter(AuthenticatedApiAdapter):
    """获取用户使用统计的适配器"""

-    start_date: datetime | None
-    end_date: datetime | None
+    time_range: TimeRangeParams | None
    search: str | None = None
    limit: int = 100
    offset: int = 0
@@ -743,11 +768,14 @@ class GetUsageAdapter(AuthenticatedApiAdapter):

        db = context.db
        user = context.user
+        start_utc = end_utc = None
+        if self.time_range:
+            start_utc, end_utc = self.time_range.to_utc_datetime_range()
        summary_list = UsageService.get_usage_summary(
            db=db,
            user_id=user.id,
-            start_date=self.start_date,
-            end_date=self.end_date,
+            start_date=start_utc,
+            end_date=end_utc,
        )

        # 过滤掉 unknown/pending provider 的记录（请求未到达任何提供商）
@@ -858,10 +886,8 @@ class GetUsageAdapter(AuthenticatedApiAdapter):
            .outerjoin(ProviderEndpoint, Usage.provider_endpoint_id == ProviderEndpoint.id)
            .filter(Usage.user_id == user.id)
        )
-        if self.start_date:
-            query = query.filter(Usage.created_at >= self.start_date)
-        if self.end_date:
-            query = query.filter(Usage.created_at <= self.end_date)
+        if start_utc and end_utc:
+            query = query.filter(Usage.created_at >= start_utc, Usage.created_at < end_utc)

        # 通用搜索：密钥名、模型名
        # 支持空格分隔的组合搜索，多个关键词之间是 AND 关系
@@ -925,10 +951,10 @@ class GetUsageAdapter(AuthenticatedApiAdapter):
            Usage.status_code == 200,
            Usage.response_time_ms.isnot(None),
        )
-        if self.start_date:
-            avg_resp_query = avg_resp_query.filter(Usage.created_at >= self.start_date)
-        if self.end_date:
-            avg_resp_query = avg_resp_query.filter(Usage.created_at <= self.end_date)
+        if start_utc and end_utc:
+            avg_resp_query = avg_resp_query.filter(
+                Usage.created_at >= start_utc, Usage.created_at < end_utc
+            )
        avg_response_ms = avg_resp_query.scalar() or 0
        avg_response_time = float(avg_response_ms) / 1000.0 if avg_response_ms else 0

--- a/src/config/constants.py
+++ b/src/config/constants.py
@@ -32,6 +32,9 @@ class CacheTTL:
    ADMIN_USAGE_AGGREGATION = 30  # 30秒
    ADMIN_USAGE_RECORDS = 10  # 10秒（列表页短缓存，避免轮询/重复刷新打爆 DB）

+    # Admin leaderboard (heavier, slower moving)
+    ADMIN_LEADERBOARD = 300  # 5分钟
+
    # 并发锁 TTL - 防止死锁
    CONCURRENCY_LOCK = 600  # 10分钟

--- a/src/core/enums.py
+++ b/src/core/enums.py
@@ -29,3 +29,19 @@ class AuthSource(str, Enum):
    LOCAL = "local"  # 本地认证
    LDAP = "ldap"  # LDAP 认证
    OAUTH = "oauth"  # OAuth 认证（账号首创来源）
+
+
+class ErrorCategory(str, Enum):
+    """错误分类枚举"""
+
+    RATE_LIMIT = "rate_limit"
+    AUTH = "auth"
+    INVALID_REQUEST = "invalid_request"
+    NOT_FOUND = "not_found"
+    CONTENT_FILTER = "content_filter"
+    CONTEXT_LENGTH = "context_length"
+    SERVER_ERROR = "server_error"
+    TIMEOUT = "timeout"
+    NETWORK = "network"
+    CANCELLED = "cancelled"
+    UNKNOWN = "unknown"
--- a/src/models/database.py
+++ b/src/models/database.py
@@ -344,6 +344,7 @@ class Usage(Base):
    is_stream = Column(Boolean, default=False)  # 是否为流式请求
    status_code = Column(Integer)
    error_message = Column(Text, nullable=True)
+    error_category = Column(String(50), nullable=True, index=True)
    response_time_ms = Column(Integer)  # 总响应时间（毫秒）
    first_byte_time_ms = Column(Integer, nullable=True)  # 首字时间/TTFB（毫秒）

@@ -1944,6 +1945,147 @@ class RequestCandidate(Base):
 # ==================== 统计数据模型 ====================


+class StatsHourly(Base):
+    """小时级统计快照 - 用于时间序列查询"""
+
+    __tablename__ = "stats_hourly"
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+
+    # 小时起点 (UTC)
+    hour_utc = Column(DateTime(timezone=True), nullable=False, unique=True, index=True)
+
+    # 请求统计
+    total_requests = Column(Integer, default=0, nullable=False)
+    success_requests = Column(Integer, default=0, nullable=False)
+    error_requests = Column(Integer, default=0, nullable=False)
+
+    # Token 统计
+    input_tokens = Column(BigInteger, default=0, nullable=False)
+    output_tokens = Column(BigInteger, default=0, nullable=False)
+    cache_creation_tokens = Column(BigInteger, default=0, nullable=False)
+    cache_read_tokens = Column(BigInteger, default=0, nullable=False)
+
+    # 成本统计 (USD)
+    total_cost = Column(Float, default=0.0, nullable=False)
+    actual_total_cost = Column(Float, default=0.0, nullable=False)
+
+    # 性能统计
+    avg_response_time_ms = Column(Float, default=0.0, nullable=False)
+
+    # 完成标记
+    is_complete = Column(Boolean, default=False, nullable=False)
+    aggregated_at = Column(DateTime(timezone=True), nullable=True)
+
+    # 时间戳
+    created_at = Column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False
+    )
+    updated_at = Column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+        nullable=False,
+    )
+
+    __table_args__ = (Index("idx_stats_hourly_hour", "hour_utc"),)
+
+
+class StatsHourlyUser(Base):
+    """小时级用户维度统计"""
+
+    __tablename__ = "stats_hourly_user"
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    hour_utc = Column(DateTime(timezone=True), nullable=False, index=True)
+    user_id = Column(String(36), nullable=False, index=True)
+
+    total_requests = Column(Integer, default=0, nullable=False)
+    success_requests = Column(Integer, default=0, nullable=False)
+    error_requests = Column(Integer, default=0, nullable=False)
+    input_tokens = Column(BigInteger, default=0, nullable=False)
+    output_tokens = Column(BigInteger, default=0, nullable=False)
+    total_cost = Column(Float, default=0.0, nullable=False)
+
+    created_at = Column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False
+    )
+    updated_at = Column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+        nullable=False,
+    )
+
+    __table_args__ = (
+        UniqueConstraint("hour_utc", "user_id", name="uq_stats_hourly_user"),
+        Index("idx_stats_hourly_user_hour", "hour_utc"),
+        Index("idx_stats_hourly_user_user_hour", "user_id", "hour_utc"),
+    )
+
+
+class StatsHourlyModel(Base):
+    """小时级模型维度统计"""
+
+    __tablename__ = "stats_hourly_model"
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    hour_utc = Column(DateTime(timezone=True), nullable=False, index=True)
+    model = Column(String(100), nullable=False, index=True)
+
+    total_requests = Column(Integer, default=0, nullable=False)
+    input_tokens = Column(BigInteger, default=0, nullable=False)
+    output_tokens = Column(BigInteger, default=0, nullable=False)
+    total_cost = Column(Float, default=0.0, nullable=False)
+    avg_response_time_ms = Column(Float, default=0.0, nullable=False)
+
+    created_at = Column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False
+    )
+    updated_at = Column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+        nullable=False,
+    )
+
+    __table_args__ = (
+        UniqueConstraint("hour_utc", "model", name="uq_stats_hourly_model"),
+        Index("idx_stats_hourly_model_hour", "hour_utc"),
+        Index("idx_stats_hourly_model_model_hour", "model", "hour_utc"),
+    )
+
+
+class StatsHourlyProvider(Base):
+    """小时级提供商维度统计"""
+
+    __tablename__ = "stats_hourly_provider"
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    hour_utc = Column(DateTime(timezone=True), nullable=False, index=True)
+    provider_name = Column(String(100), nullable=False, index=True)
+
+    total_requests = Column(Integer, default=0, nullable=False)
+    input_tokens = Column(BigInteger, default=0, nullable=False)
+    output_tokens = Column(BigInteger, default=0, nullable=False)
+    total_cost = Column(Float, default=0.0, nullable=False)
+
+    created_at = Column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False
+    )
+    updated_at = Column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+        nullable=False,
+    )
+
+    __table_args__ = (
+        UniqueConstraint("hour_utc", "provider_name", name="uq_stats_hourly_provider"),
+        Index("idx_stats_hourly_provider_hour", "hour_utc"),
+    )
+
+
 class StatsDaily(Base):
    """每日统计快照 - 用于快速查询历史数据"""

@@ -1975,12 +2117,22 @@ class StatsDaily(Base):

    # 性能统计
    avg_response_time_ms = Column(Float, default=0.0, nullable=False)
+    p50_response_time_ms = Column(Integer, nullable=True)
+    p90_response_time_ms = Column(Integer, nullable=True)
+    p99_response_time_ms = Column(Integer, nullable=True)
+    p50_first_byte_time_ms = Column(Integer, nullable=True)
+    p90_first_byte_time_ms = Column(Integer, nullable=True)
+    p99_first_byte_time_ms = Column(Integer, nullable=True)
    fallback_count = Column(Integer, default=0, nullable=False)  # Provider 切换次数

    # 使用维度统计
    unique_models = Column(Integer, default=0, server_default="0", nullable=False)
    unique_providers = Column(Integer, default=0, server_default="0", nullable=False)

+    # 完成标记
+    is_complete = Column(Boolean, default=False, nullable=False)
+    aggregated_at = Column(DateTime(timezone=True), nullable=True)
+
    # 时间戳
    created_at = Column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False
@@ -2084,6 +2236,82 @@ class StatsDailyProvider(Base):
    )


+class StatsDailyApiKey(Base):
+    """API Key 每日统计"""
+
+    __tablename__ = "stats_daily_api_key"
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    api_key_id = Column(String(36), ForeignKey("api_keys.id", ondelete="CASCADE"), nullable=False)
+    date = Column(DateTime(timezone=True), nullable=False, index=True)
+
+    total_requests = Column(Integer, default=0, nullable=False)
+    success_requests = Column(Integer, default=0, nullable=False)
+    error_requests = Column(Integer, default=0, nullable=False)
+
+    input_tokens = Column(BigInteger, default=0, nullable=False)
+    output_tokens = Column(BigInteger, default=0, nullable=False)
+    cache_creation_tokens = Column(BigInteger, default=0, nullable=False)
+    cache_read_tokens = Column(BigInteger, default=0, nullable=False)
+
+    total_cost = Column(Float, default=0.0, nullable=False)
+
+    created_at = Column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False
+    )
+    updated_at = Column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+        nullable=False,
+    )
+
+    __table_args__ = (
+        UniqueConstraint("api_key_id", "date", name="uq_stats_daily_api_key"),
+        Index("idx_stats_daily_api_key_date", "date"),
+        Index("idx_stats_daily_api_key_key_date", "api_key_id", "date"),
+        Index("idx_stats_daily_api_key_date_requests", "date", "total_requests"),
+        Index("idx_stats_daily_api_key_date_cost", "date", "total_cost"),
+    )
+
+    api_key = relationship("ApiKey")
+
+
+class StatsDailyError(Base):
+    """每日错误统计"""
+
+    __tablename__ = "stats_daily_error"
+
+    id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    date = Column(DateTime(timezone=True), nullable=False, index=True)
+    error_category = Column(String(50), nullable=False)
+    provider_name = Column(String(100), nullable=True)
+    model = Column(String(100), nullable=True)
+    count = Column(Integer, default=0, nullable=False)
+
+    created_at = Column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False
+    )
+    updated_at = Column(
+        DateTime(timezone=True),
+        default=lambda: datetime.now(timezone.utc),
+        onupdate=lambda: datetime.now(timezone.utc),
+        nullable=False,
+    )
+
+    __table_args__ = (
+        UniqueConstraint(
+            "date",
+            "error_category",
+            "provider_name",
+            "model",
+            name="uq_stats_daily_error",
+        ),
+        Index("idx_stats_daily_error_date", "date"),
+        Index("idx_stats_daily_error_category", "date", "error_category"),
+    )
+
+
 class StatsSummary(Base):
    """全局统计汇总 - 单行记录，存储截止到昨天的累计数据"""

--- a/src/services/system/maintenance_scheduler.py
+++ b/src/services/system/maintenance_scheduler.py
@@ -123,14 +123,24 @@ class MaintenanceScheduler:

        scheduler = get_scheduler()

-        # 注册定时任务（使用业务时区）
-        # 统计聚合任务 - 凌晨 1 点执行
+        # 注册定时任务
+        # 统计聚合任务 - UTC 00:05 执行
        scheduler.add_cron_job(
            self._scheduled_stats_aggregation,
-            hour=1,
-            minute=0,
+            hour=0,
+            minute=5,
            job_id="stats_aggregation",
            name="统计数据聚合",
+            timezone="UTC",
+        )
+        # 小时统计聚合任务 - 每小时 05 分执行（UTC）
+        scheduler.add_cron_job(
+            self._scheduled_hourly_stats_aggregation,
+            hour="*",
+            minute=5,
+            job_id="stats_hourly_aggregation",
+            name="统计小时数据聚合",
+            timezone="UTC",
        )
        # 统计聚合补偿任务 - 每 30 分钟检查缺失并回填
        scheduler.add_interval_job(
@@ -231,6 +241,10 @@ class MaintenanceScheduler:
        """统计聚合任务（定时调用）"""
        await self._perform_stats_aggregation(backfill=backfill)

+    async def _scheduled_hourly_stats_aggregation(self) -> None:
+        """小时统计聚合任务（定时调用）"""
+        await self._perform_hourly_stats_aggregation()
+
    async def _scheduled_cleanup(self) -> None:
        """清理任务（定时调用）"""
        await self._perform_cleanup()
@@ -282,17 +296,12 @@ class MaintenanceScheduler:

                logger.info("开始执行统计数据聚合...")

-                from zoneinfo import ZoneInfo
-
                from src.models.database import StatsDaily
                from src.models.database import User as DBUser
-                from src.services.system.scheduler import APP_TIMEZONE

-                # 使用业务时区计算日期，确保与定时任务触发时间一致
-                # 定时任务在 Asia/Shanghai 凌晨 1 点触发，此时应聚合 Asia/Shanghai 的"昨天"
-                app_tz = ZoneInfo(APP_TIMEZONE)
-                now_local = datetime.now(app_tz)
-                today_local = now_local.replace(hour=0, minute=0, second=0, microsecond=0)
+                # 使用 UTC 日期，定时任务在 UTC 00:05 触发，聚合 UTC 昨天
+                now_utc = datetime.now(timezone.utc)
+                today_utc = now_utc.replace(hour=0, minute=0, second=0, microsecond=0)

                if backfill:
                    # 启动时检查并回填缺失的日期
@@ -314,14 +323,15 @@ class MaintenanceScheduler:
                    # 非首次运行，检查最近是否有缺失的日期需要回填
                    from src.models.database import StatsDailyModel, StatsDailyProvider

-                    yesterday_business_date = today_local.date() - timedelta(days=1)
+                    yesterday_utc_date = today_utc.date() - timedelta(days=1)
                    max_backfill_days: int = (
                        SystemConfigService.get_config(db, "max_stats_backfill_days", 30) or 30
                    )

                    # 计算回填检查的起始日期
-                    check_start_date = yesterday_business_date - timedelta(
-                        days=max_backfill_days - 1
+                    check_start_date = yesterday_utc_date - timedelta(days=max_backfill_days - 1)
+                    check_start_dt = datetime.combine(
+                        check_start_date, datetime.min.time(), tzinfo=timezone.utc
                    )

                    # 获取 StatsDaily 和 StatsDailyModel 中已有数据的日期集合
@@ -330,41 +340,39 @@ class MaintenanceScheduler:
                    existing_provider_dates = set()

                    daily_stats = (
-                        db.query(StatsDaily.date)
-                        .filter(StatsDaily.date >= check_start_date.isoformat())
-                        .all()
+                        db.query(StatsDaily.date).filter(StatsDaily.date >= check_start_dt).all()
                    )
                    for (stat_date,) in daily_stats:
                        if stat_date.tzinfo is None:
                            stat_date = stat_date.replace(tzinfo=timezone.utc)
-                        existing_daily_dates.add(stat_date.astimezone(app_tz).date())
+                        existing_daily_dates.add(stat_date.date())

                    model_stats = (
                        db.query(StatsDailyModel.date)
-                        .filter(StatsDailyModel.date >= check_start_date.isoformat())
+                        .filter(StatsDailyModel.date >= check_start_dt)
                        .distinct()
                        .all()
                    )
                    for (stat_date,) in model_stats:
                        if stat_date.tzinfo is None:
                            stat_date = stat_date.replace(tzinfo=timezone.utc)
-                        existing_model_dates.add(stat_date.astimezone(app_tz).date())
+                        existing_model_dates.add(stat_date.date())

                    provider_stats = (
                        db.query(StatsDailyProvider.date)
-                        .filter(StatsDailyProvider.date >= check_start_date.isoformat())
+                        .filter(StatsDailyProvider.date >= check_start_dt)
                        .distinct()
                        .all()
                    )
                    for (stat_date,) in provider_stats:
                        if stat_date.tzinfo is None:
                            stat_date = stat_date.replace(tzinfo=timezone.utc)
-                        existing_provider_dates.add(stat_date.astimezone(app_tz).date())
+                        existing_provider_dates.add(stat_date.date())

                    # 找出需要回填的日期
                    all_dates = set()
                    current = check_start_date
-                    while current <= yesterday_business_date:
+                    while current <= yesterday_utc_date:
                        all_dates.add(current)
                        current += timedelta(days=1)

@@ -389,43 +397,17 @@ class MaintenanceScheduler:
                        )

                        users = db.query(DBUser.id).filter(DBUser.is_active.is_(True)).all()
+                        user_ids = [user_id for (user_id,) in users]

                        failed_dates = 0
-                        failed_users = 0
-
                        for current_date in sorted_dates:
                            try:
-                                current_date_local = datetime.combine(
-                                    current_date, datetime.min.time(), tzinfo=app_tz
+                                current_date_utc = datetime.combine(
+                                    current_date, datetime.min.time(), tzinfo=timezone.utc
+                                )
+                                StatsAggregatorService.aggregate_daily_stats_bundle(
+                                    db, current_date_utc, user_ids=user_ids
                                )
-                                # 只在缺失时才聚合对应的表
-                                if current_date in missing_daily_dates:
-                                    StatsAggregatorService.aggregate_daily_stats(
-                                        db, current_date_local
-                                    )
-                                if current_date in missing_model_dates:
-                                    StatsAggregatorService.aggregate_daily_model_stats(
-                                        db, current_date_local
-                                    )
-                                if current_date in missing_provider_dates:
-                                    StatsAggregatorService.aggregate_daily_provider_stats(
-                                        db, current_date_local
-                                    )
-                                # 用户统计在任一缺失时都回填
-                                for (user_id,) in users:
-                                    try:
-                                        StatsAggregatorService.aggregate_user_daily_stats(
-                                            db, user_id, current_date_local
-                                        )
-                                    except Exception as e:
-                                        failed_users += 1
-                                        logger.warning(
-                                            f"回填用户 {user_id} 日期 {current_date} 失败: {e}"
-                                        )
-                                        try:
-                                            db.rollback()
-                                        except Exception as rollback_err:
-                                            logger.error(f"回滚失败: {rollback_err}")
                            except Exception as e:
                                failed_dates += 1
                                logger.warning(f"回填日期 {current_date} 失败: {e}")
@@ -436,10 +418,10 @@ class MaintenanceScheduler:

                        StatsAggregatorService.update_summary(db)

-                        if failed_dates > 0 or failed_users > 0:
+                        if failed_dates > 0:
                            logger.warning(
                                f"回填完成，共处理 {len(dates_to_process)} 天，"
-                                f"失败: {failed_dates} 天, {failed_users} 个用户记录"
+                                f"失败: {failed_dates} 天"
                            )
                        else:
                            logger.info(f"缺失数据回填完成，共处理 {len(dates_to_process)} 天")
@@ -447,25 +429,14 @@ class MaintenanceScheduler:
                        logger.info("统计数据已是最新，无需回填")
                    return

-                # 定时任务：聚合昨天的数据
-                yesterday_local = today_local - timedelta(days=1)
-
-                StatsAggregatorService.aggregate_daily_stats(db, yesterday_local)
-                StatsAggregatorService.aggregate_daily_model_stats(db, yesterday_local)
-                StatsAggregatorService.aggregate_daily_provider_stats(db, yesterday_local)
-
+                # 定时任务：聚合昨天 (UTC) 的数据
+                yesterday_utc = today_utc - timedelta(days=1)
                users = db.query(DBUser.id).filter(DBUser.is_active.is_(True)).all()
-                for (user_id,) in users:
-                    try:
-                        StatsAggregatorService.aggregate_user_daily_stats(
-                            db, user_id, yesterday_local
-                        )
-                    except Exception as e:
-                        logger.warning(f"聚合用户 {user_id} 统计数据失败: {e}")
-                        try:
-                            db.rollback()
-                        except Exception:
-                            pass
+                user_ids = [user_id for (user_id,) in users]
+
+                StatsAggregatorService.aggregate_daily_stats_bundle(
+                    db, yesterday_utc, user_ids=user_ids
+                )

                StatsAggregatorService.update_summary(db)

@@ -480,6 +451,27 @@ class MaintenanceScheduler:
            finally:
                db.close()

+    async def _perform_hourly_stats_aggregation(self) -> None:
+        """执行小时统计聚合任务"""
+        db = create_session()
+        try:
+            if not SystemConfigService.get_config(db, "enable_stats_aggregation", True):
+                logger.info("统计聚合已禁用，跳过小时聚合任务")
+                return
+
+            now_utc = datetime.now(timezone.utc)
+            last_hour = now_utc.replace(minute=0, second=0, microsecond=0) - timedelta(hours=1)
+            StatsAggregatorService.aggregate_hourly_stats_bundle(db, last_hour)
+            logger.info(f"小时统计聚合完成: {last_hour.isoformat()}")
+        except Exception as e:
+            logger.exception(f"小时统计聚合任务执行失败: {e}")
+            try:
+                db.rollback()
+            except Exception:
+                pass
+        finally:
+            db.close()
+
    async def _perform_pending_cleanup(self) -> None:
        """执行 pending 状态清理"""
        db = create_session()
--- a/src/services/system/scheduler.py
+++ b/src/services/system/scheduler.py
@@ -41,10 +41,11 @@ class TaskScheduler:
    def add_cron_job(
        self,
        func: Callable[..., Any],
-        hour: int,
+        hour: int | str,
        minute: int = 0,
        job_id: str | None = None,
        name: str | None = None,
+        timezone: str | None = None,
        **kwargs: Any,
    ) -> Any:
        """
@@ -58,7 +59,8 @@ class TaskScheduler:
            name: 任务名称（用于日志）
            **kwargs: 传递给任务函数的参数
        """
-        trigger = CronTrigger(hour=hour, minute=minute, timezone=APP_TIMEZONE)
+        trigger_timezone = timezone or APP_TIMEZONE
+        trigger = CronTrigger(hour=hour, minute=minute, timezone=trigger_timezone)

        job_id = job_id or func.__name__
        display_name = name or job_id
@@ -74,7 +76,7 @@ class TaskScheduler:

        logger.info(
            f"已注册定时任务: {display_name}, "
-            f"执行时间: {hour:02d}:{minute:02d} ({APP_TIMEZONE})"
+            f"执行时间: {hour}:{minute:02d} ({trigger_timezone})"
        )

    def add_interval_job(
--- a/src/services/system/stats_aggregator.py
+++ b/src/services/system/stats_aggregator.py
--- a/src/services/system/time_range.py
+++ b/src/services/system/time_range.py
@@ -0,0 +1,241 @@
+"""Time range utilities for stats queries."""
+
+from __future__ import annotations
+
+from datetime import date, datetime, time, timedelta, timezone
+from typing import Literal
+
+from pydantic import BaseModel, model_validator
+
+
+class TimeRangeParams(BaseModel):
+    """
+    Time range parameters (local-date semantics).
+
+    Rules:
+    1) Inputs are user-local dates, backend converts to UTC datetime range.
+    2) Range is half-open: [start, end).
+    """
+
+    start_date: date | None = None
+    end_date: date | None = None
+
+    preset: (
+        Literal[
+            "today",
+            "yesterday",
+            "last7days",
+            "last30days",
+            "last90days",
+            "this_week",
+            "last_week",
+            "this_month",
+            "last_month",
+            "this_year",
+        ]
+        | None
+    ) = None
+
+    granularity: Literal["hour", "day", "week", "month"] = "day"
+
+    timezone: str | None = None
+    tz_offset_minutes: int = 0
+
+    @model_validator(mode="after")
+    def validate_and_resolve(self) -> "TimeRangeParams":
+        """Validate and resolve preset to concrete dates."""
+        if self.preset:
+            user_today = self._get_user_today()
+            match self.preset:
+                case "today":
+                    self.start_date = self.end_date = user_today
+                case "yesterday":
+                    self.start_date = self.end_date = user_today - timedelta(days=1)
+                case "last7days":
+                    self.start_date = user_today - timedelta(days=6)
+                    self.end_date = user_today
+                case "last30days":
+                    self.start_date = user_today - timedelta(days=29)
+                    self.end_date = user_today
+                case "last90days":
+                    self.start_date = user_today - timedelta(days=89)
+                    self.end_date = user_today
+                case "this_week":
+                    self.start_date = user_today - timedelta(days=user_today.weekday())
+                    self.end_date = user_today
+                case "last_week":
+                    week_start = user_today - timedelta(days=user_today.weekday())
+                    self.start_date = week_start - timedelta(days=7)
+                    self.end_date = week_start - timedelta(days=1)
+                case "this_month":
+                    self.start_date = user_today.replace(day=1)
+                    self.end_date = user_today
+                case "last_month":
+                    first_of_this_month = user_today.replace(day=1)
+                    self.end_date = first_of_this_month - timedelta(days=1)
+                    self.start_date = self.end_date.replace(day=1)
+                case "this_year":
+                    self.start_date = user_today.replace(month=1, day=1)
+                    self.end_date = user_today
+
+        if not self.preset and (self.start_date is None or self.end_date is None):
+            raise ValueError("Either preset or both start_date and end_date must be provided")
+
+        if self.start_date and self.end_date and self.start_date > self.end_date:
+            raise ValueError("start_date must be <= end_date")
+
+        if self.start_date and self.end_date:
+            max_days = 365
+            days = (self.end_date - self.start_date).days
+            if days > max_days:
+                raise ValueError(f"Query range cannot exceed {max_days} days")
+
+        if self.granularity == "hour":
+            if self.start_date != self.end_date:
+                raise ValueError("Hour granularity only supports single day query")
+
+        return self
+
+    def validate_for_time_series(self) -> "TimeRangeParams":
+        """Extra validation for time series queries."""
+        if self.granularity == "hour" and self.start_date != self.end_date:
+            raise ValueError("Hour granularity only supports single day query")
+        if self.start_date and self.end_date:
+            days_inclusive = (self.end_date - self.start_date).days + 1
+            max_days_for_time_series = 90
+            if days_inclusive > max_days_for_time_series:
+                raise ValueError(
+                    f"Time series query range cannot exceed {max_days_for_time_series} days "
+                    f"(requested {days_inclusive} days). "
+                    "For longer ranges, use aggregated statistics instead."
+                )
+        return self
+
+    def _get_user_today(self) -> date:
+        """Get user-local 'today'."""
+        if self.timezone:
+            try:
+                from zoneinfo import ZoneInfo
+
+                user_tz = ZoneInfo(self.timezone)
+                return datetime.now(user_tz).date()
+            except Exception:
+                pass
+
+        user_now = datetime.now(timezone.utc) + timedelta(minutes=self.tz_offset_minutes)
+        return user_now.date()
+
+    def _get_tz_offset_for_date(self, local_date: date) -> timedelta:
+        """Get timezone offset for a local date (DST-aware if timezone is provided)."""
+        if self.timezone:
+            try:
+                from zoneinfo import ZoneInfo
+
+                user_tz = ZoneInfo(self.timezone)
+                local_midnight = datetime.combine(local_date, time.min)
+                local_aware = local_midnight.replace(tzinfo=user_tz)
+                return local_aware.utcoffset() or timedelta(0)
+            except Exception:
+                pass
+        return timedelta(minutes=self.tz_offset_minutes)
+
+    def to_utc_datetime_range(self) -> tuple[datetime, datetime]:
+        """Convert to UTC datetime range (half-open)."""
+        start_offset = self._get_tz_offset_for_date(self.start_date)
+        end_offset = self._get_tz_offset_for_date(self.end_date + timedelta(days=1))
+
+        local_start = datetime.combine(self.start_date, time.min)
+        local_end = datetime.combine(self.end_date + timedelta(days=1), time.min)
+
+        start_utc = (local_start - start_offset).replace(tzinfo=timezone.utc)
+        end_utc = (local_end - end_offset).replace(tzinfo=timezone.utc)
+        return start_utc, end_utc
+
+    def get_complete_utc_dates(
+        self,
+    ) -> tuple[list[date], tuple[datetime, datetime] | None, tuple[datetime, datetime] | None]:
+        """Split into complete UTC days + head/tail boundaries."""
+        start_utc, end_utc = self.to_utc_datetime_range()
+
+        if (
+            start_utc.hour == 0
+            and start_utc.minute == 0
+            and start_utc.second == 0
+            and start_utc.microsecond == 0
+        ):
+            first_complete_date = start_utc.date()
+            head_boundary = None
+        else:
+            first_complete_date = start_utc.date() + timedelta(days=1)
+            head_boundary = (
+                start_utc,
+                datetime.combine(first_complete_date, time.min, tzinfo=timezone.utc),
+            )
+
+        if (
+            end_utc.hour == 0
+            and end_utc.minute == 0
+            and end_utc.second == 0
+            and end_utc.microsecond == 0
+        ):
+            last_complete_date = end_utc.date() - timedelta(days=1)
+            tail_boundary = None
+        else:
+            last_complete_date = end_utc.date() - timedelta(days=1)
+            tail_start = datetime.combine(end_utc.date(), time.min, tzinfo=timezone.utc)
+            tail_boundary = (tail_start, end_utc)
+
+        complete_dates = []
+        if first_complete_date <= last_complete_date:
+            current = first_complete_date
+            while current <= last_complete_date:
+                complete_dates.append(current)
+                current += timedelta(days=1)
+
+        return complete_dates, head_boundary, tail_boundary
+
+    def get_local_day_hours(self) -> list[tuple[date, datetime, datetime]]:
+        """Return local-day mapped UTC ranges for time-series."""
+        result = []
+        current_date = self.start_date
+        while current_date <= self.end_date:
+            offset = self._get_tz_offset_for_date(current_date)
+            local_start = datetime.combine(current_date, time.min)
+            local_end = datetime.combine(current_date + timedelta(days=1), time.min)
+            day_start_utc = (local_start - offset).replace(tzinfo=timezone.utc)
+            day_end_utc = (
+                local_end - self._get_tz_offset_for_date(current_date + timedelta(days=1))
+            ).replace(tzinfo=timezone.utc)
+            result.append((current_date, day_start_utc, day_end_utc))
+            current_date += timedelta(days=1)
+        return result
+
+
+def split_time_range_for_hourly(start_utc: datetime, end_utc: datetime) -> tuple[
+    tuple[datetime, datetime] | None,
+    list[datetime],
+    tuple[datetime, datetime] | None,
+]:
+    """Split into head fragment, complete hours, tail fragment."""
+    first_hour = start_utc.replace(minute=0, second=0, microsecond=0)
+    if start_utc > first_hour:
+        first_hour += timedelta(hours=1)
+        head_fragment = (start_utc, first_hour) if first_hour <= end_utc else None
+    else:
+        head_fragment = None
+        first_hour = start_utc
+
+    last_hour = end_utc.replace(minute=0, second=0, microsecond=0)
+    if end_utc > last_hour:
+        tail_fragment = (last_hour, end_utc) if last_hour >= first_hour else None
+    else:
+        tail_fragment = None
+        last_hour = end_utc
+
+    complete_hours = []
+    current = first_hour
+    while current < last_hour:
+        complete_hours.append(current)
+        current += timedelta(hours=1)
+
+    return head_fragment, complete_hours, tail_fragment
--- a/src/services/usage/error_classifier.py
+++ b/src/services/usage/error_classifier.py
@@ -0,0 +1,70 @@
+"""Error classification helpers for Usage records."""
+
+from __future__ import annotations
+
+from src.core.enums import ErrorCategory
+
+_STATUS_CODE_MAP: dict[int, ErrorCategory] = {
+    400: ErrorCategory.INVALID_REQUEST,
+    401: ErrorCategory.AUTH,
+    403: ErrorCategory.AUTH,
+    404: ErrorCategory.NOT_FOUND,
+    408: ErrorCategory.TIMEOUT,
+    429: ErrorCategory.RATE_LIMIT,
+    500: ErrorCategory.SERVER_ERROR,
+    502: ErrorCategory.SERVER_ERROR,
+    503: ErrorCategory.SERVER_ERROR,
+    504: ErrorCategory.TIMEOUT,
+}
+
+_CONTEXT_LENGTH_PATTERNS = (
+    "context_length_exceeded",
+    "maximum context length",
+    "too many tokens",
+    "input is too long",
+)
+
+_CONTENT_FILTER_PATTERNS = (
+    "content_filter",
+    "content_policy",
+    "safety_block",
+    "blocked by content",
+)
+
+_NETWORK_PATTERNS = ("connection", "network", "dns", "socket")
+
+
+def classify_error(
+    status_code: int | None,
+    error_message: str | None,
+    status: str | None = None,
+) -> ErrorCategory:
+    """Map provider errors to ErrorCategory."""
+    if status and status.lower() == "cancelled":
+        return ErrorCategory.CANCELLED
+
+    if status_code is not None:
+        mapped = _STATUS_CODE_MAP.get(status_code)
+        if mapped:
+            return mapped
+
+    if error_message:
+        msg_lower = error_message.lower()
+        if any(p in msg_lower for p in _CONTEXT_LENGTH_PATTERNS):
+            return ErrorCategory.CONTEXT_LENGTH
+        if any(p in msg_lower for p in _CONTENT_FILTER_PATTERNS):
+            return ErrorCategory.CONTENT_FILTER
+        if "rate limit" in msg_lower or "rate_limit" in msg_lower:
+            return ErrorCategory.RATE_LIMIT
+        if "timeout" in msg_lower or "timed out" in msg_lower:
+            return ErrorCategory.TIMEOUT
+        if any(p in msg_lower for p in _NETWORK_PATTERNS):
+            return ErrorCategory.NETWORK
+
+    if status_code is not None:
+        if status_code >= 500:
+            return ErrorCategory.SERVER_ERROR
+        if status_code >= 400:
+            return ErrorCategory.INVALID_REQUEST
+
+    return ErrorCategory.UNKNOWN
--- a/src/services/usage/service.py
+++ b/src/services/usage/service.py
@@ -27,6 +27,7 @@ from src.models.database import (
 )
 from src.services.model.cost import ModelCostService
 from src.services.system.config import SystemConfigService
+from src.services.usage.error_classifier import classify_error


@dataclass
@@ -335,6 +336,10 @@ class UsageService:
            actual_request_cost = request_cost * actual_rate_multiplier
            actual_total_cost = total_cost * actual_rate_multiplier

+        error_category = None
+        if status_code >= 400 or error_message or status in {"failed", "cancelled"}:
+            error_category = classify_error(status_code, error_message, status).value
+
        return {
            "user_id": user.id if user else None,
            "api_key_id": api_key.id if api_key else None,
@@ -376,6 +381,7 @@ class UsageService:
            "is_stream": is_stream,
            "status_code": status_code,
            "error_message": error_message,
+            "error_category": error_category,
            "response_time_ms": response_time_ms,
            "first_byte_time_ms": first_byte_time_ms,
            "status": status,
@@ -586,6 +592,7 @@ class UsageService:
        existing_usage.status = usage_params["status"]
        existing_usage.status_code = usage_params["status_code"]
        existing_usage.error_message = usage_params["error_message"]
+        existing_usage.error_category = usage_params.get("error_category")
        existing_usage.response_time_ms = usage_params["response_time_ms"]
        existing_usage.first_byte_time_ms = usage_params["first_byte_time_ms"]

@@ -2068,7 +2075,7 @@ class UsageService:
        if start_date:
            query = query.filter(Usage.created_at >= start_date)
        if end_date:
-            query = query.filter(Usage.created_at <= end_date)
+            query = query.filter(Usage.created_at < end_date)

        # 使用跨数据库兼容的日期函数
        from src.utils.database_helpers import date_trunc_portable
@@ -2108,7 +2115,7 @@ class UsageService:
        if start_date:
            summary = summary.filter(Usage.created_at >= start_date)
        if end_date:
-            summary = summary.filter(Usage.created_at <= end_date)
+            summary = summary.filter(Usage.created_at < end_date)

        summary = summary.group_by(date_func, Usage.provider_name, Usage.model).all()

--- a/tests/services/usage/test_error_classifier.py
+++ b/tests/services/usage/test_error_classifier.py
@@ -0,0 +1,27 @@
+import pytest
+
+from src.core.enums import ErrorCategory
+from src.services.usage.error_classifier import classify_error
+
+
+@pytest.mark.parametrize(
+    "status_code,error_message,status,expected",
+    [
+        (429, None, None, ErrorCategory.RATE_LIMIT),
+        (401, None, None, ErrorCategory.AUTH),
+        (404, None, None, ErrorCategory.NOT_FOUND),
+        (None, "maximum context length exceeded", None, ErrorCategory.CONTEXT_LENGTH),
+        (None, "content_filter triggered", None, ErrorCategory.CONTENT_FILTER),
+        (None, "rate limit reached", None, ErrorCategory.RATE_LIMIT),
+        (None, "request timeout", None, ErrorCategory.TIMEOUT),
+        (None, "connection reset by peer", None, ErrorCategory.NETWORK),
+        (500, None, None, ErrorCategory.SERVER_ERROR),
+        (400, None, None, ErrorCategory.INVALID_REQUEST),
+        (200, None, "cancelled", ErrorCategory.CANCELLED),
+        (None, None, None, ErrorCategory.UNKNOWN),
+    ],
+)
+def test_classify_error(
+    status_code: int | None, error_message: str | None, status: str | None, expected: ErrorCategory
+) -> None:
+    assert classify_error(status_code, error_message, status) == expected
--- a/tests/unit/test_time_range_params.py
+++ b/tests/unit/test_time_range_params.py
@@ -0,0 +1,274 @@
+from datetime import date, datetime, timedelta, timezone
+
+import pytest
+
+from src.services.system.time_range import TimeRangeParams, split_time_range_for_hourly
+
+
+class TestTimeRangeParams:
+    # ==================== UTC 转换测试 ====================
+
+    def test_to_utc_datetime_range_with_offset(self) -> None:
+        """测试带时区偏移的 UTC 转换"""
+        params = TimeRangeParams(
+            start_date=date(2026, 2, 1),
+            end_date=date(2026, 2, 1),
+            tz_offset_minutes=480,  # UTC+8
+        )
+        start_utc, end_utc = params.to_utc_datetime_range()
+        assert start_utc == datetime(2026, 1, 31, 16, 0, tzinfo=timezone.utc)
+        assert end_utc == datetime(2026, 2, 1, 16, 0, tzinfo=timezone.utc)
+
+    def test_to_utc_datetime_range_negative_offset(self) -> None:
+        """测试负时区偏移（如 UTC-5）"""
+        params = TimeRangeParams(
+            start_date=date(2026, 2, 1),
+            end_date=date(2026, 2, 1),
+            tz_offset_minutes=-300,  # UTC-5
+        )
+        start_utc, end_utc = params.to_utc_datetime_range()
+        assert start_utc == datetime(2026, 2, 1, 5, 0, tzinfo=timezone.utc)
+        assert end_utc == datetime(2026, 2, 2, 5, 0, tzinfo=timezone.utc)
+
+    def test_to_utc_datetime_range_utc(self) -> None:
+        """测试 UTC 时区（无偏移）"""
+        params = TimeRangeParams(
+            start_date=date(2026, 2, 1),
+            end_date=date(2026, 2, 3),
+            tz_offset_minutes=0,
+        )
+        start_utc, end_utc = params.to_utc_datetime_range()
+        assert start_utc == datetime(2026, 2, 1, 0, 0, tzinfo=timezone.utc)
+        assert end_utc == datetime(2026, 2, 4, 0, 0, tzinfo=timezone.utc)  # end_date + 1 day
+
+    # ==================== 预设解析测试 ====================
+
+    def test_preset_today(self) -> None:
+        """测试 today 预设"""
+        params = TimeRangeParams(preset="today", tz_offset_minutes=0)
+        assert params.start_date is not None
+        assert params.end_date is not None
+        assert params.start_date == params.end_date
+
+    def test_preset_yesterday(self) -> None:
+        """测试 yesterday 预设"""
+        params = TimeRangeParams(preset="yesterday", tz_offset_minutes=0)
+        assert params.start_date is not None
+        assert params.end_date is not None
+        assert params.start_date == params.end_date
+        today_params = TimeRangeParams(preset="today", tz_offset_minutes=0)
+        assert today_params.start_date is not None
+        assert params.start_date == today_params.start_date - timedelta(days=1)
+
+    def test_preset_last7days(self) -> None:
+        """测试 last7days 预设（包含今天共 7 天）"""
+        params = TimeRangeParams(preset="last7days", tz_offset_minutes=0)
+        assert params.start_date is not None
+        assert params.end_date is not None
+        days_diff = (params.end_date - params.start_date).days
+        assert days_diff == 6  # start 到 end 共 7 天
+
+    def test_preset_last30days(self) -> None:
+        """测试 last30days 预设"""
+        params = TimeRangeParams(preset="last30days", tz_offset_minutes=0)
+        assert params.start_date is not None
+        assert params.end_date is not None
+        days_diff = (params.end_date - params.start_date).days
+        assert days_diff == 29  # start 到 end 共 30 天
+
+    def test_preset_this_month(self) -> None:
+        """测试 this_month 预设"""
+        params = TimeRangeParams(preset="this_month", tz_offset_minutes=0)
+        assert params.start_date is not None
+        assert params.end_date is not None
+        assert params.start_date.day == 1  # 月初
+        assert params.start_date.month == params.end_date.month
+
+    def test_preset_last_month(self) -> None:
+        """测试 last_month 预设"""
+        params = TimeRangeParams(preset="last_month", tz_offset_minutes=0)
+        assert params.start_date is not None
+        assert params.end_date is not None
+        assert params.start_date.day == 1  # 上月初
+        # end_date 应该是上月最后一天
+        next_day = params.end_date + timedelta(days=1)
+        assert next_day.day == 1  # 下一天是本月初
+
+    # ==================== 跨年/闰年测试 ====================
+
+    def test_cross_year_range(self) -> None:
+        """测试跨年日期范围"""
+        params = TimeRangeParams(
+            start_date=date(2025, 12, 28),
+            end_date=date(2026, 1, 3),
+            tz_offset_minutes=0,
+        )
+        assert params.start_date is not None
+        assert params.end_date is not None
+        start_utc, end_utc = params.to_utc_datetime_range()
+        assert start_utc.year == 2025
+        assert end_utc.year == 2026
+        days = (params.end_date - params.start_date).days + 1
+        assert days == 7
+
+    def test_leap_year_february(self) -> None:
+        """测试闰年 2 月（2024 是闰年）"""
+        params = TimeRangeParams(
+            start_date=date(2024, 2, 28),
+            end_date=date(2024, 3, 1),
+            tz_offset_minutes=0,
+        )
+        assert params.start_date is not None
+        assert params.end_date is not None
+        start_utc, end_utc = params.to_utc_datetime_range()
+        days = (params.end_date - params.start_date).days + 1
+        assert days == 3  # 28, 29, 1
+
+    def test_non_leap_year_february(self) -> None:
+        """测试非闰年 2 月"""
+        params = TimeRangeParams(
+            start_date=date(2025, 2, 28),
+            end_date=date(2025, 3, 1),
+            tz_offset_minutes=0,
+        )
+        assert params.start_date is not None
+        assert params.end_date is not None
+        days = (params.end_date - params.start_date).days + 1
+        assert days == 2  # 28, 1
+
+    # ==================== 验证错误测试 ====================
+
+    def test_validate_for_time_series_limit(self) -> None:
+        """测试时间序列超过 90 天限制"""
+        params = TimeRangeParams(
+            start_date=date(2026, 1, 1),
+            end_date=date(2026, 4, 5),  # 95 days inclusive
+            tz_offset_minutes=0,
+        )
+        with pytest.raises(ValueError):
+            params.validate_for_time_series()
+
+    def test_validate_start_after_end(self) -> None:
+        """测试 start_date > end_date 应报错"""
+        with pytest.raises(ValueError):
+            TimeRangeParams(
+                start_date=date(2026, 2, 10),
+                end_date=date(2026, 2, 1),
+                tz_offset_minutes=0,
+            )
+
+    def test_validate_max_days_exceeded(self) -> None:
+        """测试超过 365 天限制"""
+        with pytest.raises(ValueError):
+            TimeRangeParams(
+                start_date=date(2025, 1, 1),
+                end_date=date(2026, 2, 1),  # > 365 days
+                tz_offset_minutes=0,
+            )
+
+    def test_validate_hour_granularity_multi_day(self) -> None:
+        """测试小时粒度不支持多天"""
+        with pytest.raises(ValueError):
+            TimeRangeParams(
+                start_date=date(2026, 2, 1),
+                end_date=date(2026, 2, 2),
+                granularity="hour",
+                tz_offset_minutes=0,
+            )
+
+    def test_validate_missing_dates_and_preset(self) -> None:
+        """测试缺少日期和预设应报错"""
+        with pytest.raises(ValueError):
+            TimeRangeParams(tz_offset_minutes=0)
+
+    # ==================== 完整 UTC 日期分割测试 ====================
+
+    def test_get_complete_utc_dates_aligned(self) -> None:
+        """测试 UTC 对齐时无头尾边界"""
+        params = TimeRangeParams(
+            start_date=date(2026, 2, 1),
+            end_date=date(2026, 2, 3),
+            tz_offset_minutes=0,  # UTC 对齐
+        )
+        assert params.start_date is not None
+        assert params.end_date is not None
+        complete_dates, head, tail = params.get_complete_utc_dates()
+        assert len(complete_dates) == 3
+        assert head is None
+        assert tail is None
+
+    def test_get_complete_utc_dates_with_offset(self) -> None:
+        """测试带偏移时产生头尾边界"""
+        params = TimeRangeParams(
+            start_date=date(2026, 2, 1),
+            end_date=date(2026, 2, 3),
+            tz_offset_minutes=480,  # UTC+8
+        )
+        assert params.start_date is not None
+        assert params.end_date is not None
+        complete_dates, head, tail = params.get_complete_utc_dates()
+        # UTC+8 的 2/1 00:00 = UTC 1/31 16:00，会产生头边界
+        assert head is not None or tail is not None or len(complete_dates) < 3
+
+    # ==================== 本地日期小时映射测试 ====================
+
+    def test_get_local_day_hours(self) -> None:
+        """测试本地日期到 UTC 小时映射"""
+        params = TimeRangeParams(
+            start_date=date(2026, 2, 1),
+            end_date=date(2026, 2, 2),
+            tz_offset_minutes=480,  # UTC+8
+        )
+        assert params.start_date is not None
+        assert params.end_date is not None
+        local_days = params.get_local_day_hours()
+        assert len(local_days) == 2
+        for local_date, start_utc, end_utc in local_days:
+            assert isinstance(local_date, date)
+            assert isinstance(start_utc, datetime)
+            assert isinstance(end_utc, datetime)
+            # 每天应该正好是 24 小时
+            assert (end_utc - start_utc).total_seconds() == 24 * 3600
+
+
+class TestSplitTimeRangeForHourly:
+    """测试小时级时间范围分割"""
+
+    def test_aligned_hours(self) -> None:
+        """测试整点对齐的时间范围"""
+        start = datetime(2026, 2, 1, 0, 0, tzinfo=timezone.utc)
+        end = datetime(2026, 2, 1, 3, 0, tzinfo=timezone.utc)
+        head, complete, tail = split_time_range_for_hourly(start, end)
+        assert head is None
+        assert tail is None
+        assert len(complete) == 3
+
+    def test_with_head_fragment(self) -> None:
+        """测试带头部碎片"""
+        start = datetime(2026, 2, 1, 0, 30, tzinfo=timezone.utc)
+        end = datetime(2026, 2, 1, 3, 0, tzinfo=timezone.utc)
+        head, complete, tail = split_time_range_for_hourly(start, end)
+        assert head is not None
+        assert head[0] == start
+        assert head[1] == datetime(2026, 2, 1, 1, 0, tzinfo=timezone.utc)
+        assert len(complete) == 2  # 1:00, 2:00
+
+    def test_with_tail_fragment(self) -> None:
+        """测试带尾部碎片"""
+        start = datetime(2026, 2, 1, 0, 0, tzinfo=timezone.utc)
+        end = datetime(2026, 2, 1, 2, 30, tzinfo=timezone.utc)
+        head, complete, tail = split_time_range_for_hourly(start, end)
+        assert head is None
+        assert tail is not None
+        assert tail[0] == datetime(2026, 2, 1, 2, 0, tzinfo=timezone.utc)
+        assert tail[1] == end
+        assert len(complete) == 2  # 0:00, 1:00
+
+    def test_with_both_fragments(self) -> None:
+        """测试同时带头尾碎片"""
+        start = datetime(2026, 2, 1, 0, 15, tzinfo=timezone.utc)
+        end = datetime(2026, 2, 1, 2, 45, tzinfo=timezone.utc)
+        head, complete, tail = split_time_range_for_hourly(start, end)
+        assert head is not None
+        assert tail is not None
+        assert len(complete) == 1  # 只有 1:00-2:00 是完整的