feat(frontend): 用量页面 UI 优化 - 合并格式/类型列、分析面板可折叠

- UsageRecordsTable: 合并 API 格式与类型为单列，缩减列宽使表格更紧凑
- MainLayout: 添加 header 级 Teleport 插入点供子页面注入操作按钮
- Usage: 用量分析面板改为可折叠，折叠状态持久化到 localStorage

frontend/src/features/usage/components/UsageRecordsTable.vue

@@ -3,172 +3,167 @@
     <template #actions>
       <!-- 时间范围筛选 -->
       <TimeRangePicker
-        v-model="timeRangeModel"
-        :show-granularity="false"
-      />
+            v-model="timeRangeModel"
+            :show-granularity="false"
+          />
 
-      <!-- 分隔线 -->
-      <div class="hidden sm:block h-4 w-px bg-border" />
+          <!-- 分隔线 -->
+          <div class="hidden sm:block h-4 w-px bg-border" />
 
-      <!-- 通用搜索 -->
-      <div class="relative">
-        <Search class="absolute left-2.5 top-1/2 -translate-y-1/2 h-3.5 w-3.5 text-muted-foreground z-10 pointer-events-none" />
-        <Input
-          id="usage-records-search"
-          v-model="localSearch"
-          :placeholder="isAdmin ? '搜索用户/密钥' : '搜索密钥/模型'"
-          class="w-[7.5rem] sm:w-48 h-8 text-xs border-border/60 pl-8"
-        />
-      </div>
+          <!-- 通用搜索 -->
+          <div class="relative">
+            <Search class="absolute left-2.5 top-1/2 -translate-y-1/2 h-3.5 w-3.5 text-muted-foreground z-10 pointer-events-none" />
+            <Input
+              id="usage-records-search"
+              v-model="localSearch"
+              :placeholder="isAdmin ? '搜索用户/密钥' : '搜索密钥/模型'"
+              class="w-[7.5rem] sm:w-48 h-8 text-xs border-border/60 pl-8"
+            />
+          </div>
 
-      <!-- 用户筛选（仅管理员可见） -->
-      <Select
-        v-if="isAdmin && availableUsers.length > 0"
-
-        :model-value="filterUser"
-        @update:model-value="$emit('update:filterUser', $event)"
-      >
-        <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-36 h-8 text-xs border-border/60">
-          <SelectValue placeholder="用户" />
-        </SelectTrigger>
-        <SelectContent>
-          <SelectItem value="__all__">
-            全部用户
-          </SelectItem>
-          <SelectItem
-            v-for="user in availableUsers"
-            :key="user.id"
-            :value="user.id"
+          <!-- 用户筛选（仅管理员可见） -->
+          <Select
+            v-if="isAdmin && availableUsers.length > 0"
+            :model-value="filterUser"
+            @update:model-value="$emit('update:filterUser', $event)"
           >
-            {{ user.username || user.email }}
-          </SelectItem>
-        </SelectContent>
-      </Select>
+            <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-36 h-8 text-xs border-border/60">
+              <SelectValue placeholder="用户" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="__all__">
+                全部用户
+              </SelectItem>
+              <SelectItem
+                v-for="user in availableUsers"
+                :key="user.id"
+                :value="user.id"
+              >
+                {{ user.username || user.email }}
+              </SelectItem>
+            </SelectContent>
+          </Select>
 
-      <!-- 模型筛选 -->
-      <Select
-
-        :model-value="filterModel"
-        @update:model-value="$emit('update:filterModel', $event)"
-      >
-        <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-40 h-8 text-xs border-border/60">
-          <SelectValue placeholder="模型" />
-        </SelectTrigger>
-        <SelectContent>
-          <SelectItem value="__all__">
-            全部模型
-          </SelectItem>
-          <SelectItem
-            v-for="model in availableModels"
-            :key="model"
-            :value="model"
+          <!-- 模型筛选 -->
+          <Select
+            :model-value="filterModel"
+            @update:model-value="$emit('update:filterModel', $event)"
           >
-            {{ model.replace('claude-', '') }}
-          </SelectItem>
-        </SelectContent>
-      </Select>
+            <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-40 h-8 text-xs border-border/60">
+              <SelectValue placeholder="模型" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="__all__">
+                全部模型
+              </SelectItem>
+              <SelectItem
+                v-for="model in availableModels"
+                :key="model"
+                :value="model"
+              >
+                {{ model.replace('claude-', '') }}
+              </SelectItem>
+            </SelectContent>
+          </Select>
 
-      <!-- 提供商筛选（仅管理员可见） -->
-      <Select
-        v-if="isAdmin"
-
-        :model-value="filterProvider"
-        @update:model-value="$emit('update:filterProvider', $event)"
-      >
-        <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-32 h-8 text-xs border-border/60">
-          <SelectValue placeholder="提供商" />
-        </SelectTrigger>
-        <SelectContent>
-          <SelectItem value="__all__">
-            全部提供商
-          </SelectItem>
-          <SelectItem
-            v-for="provider in availableProviders"
-            :key="provider"
-            :value="provider"
+          <!-- 提供商筛选（仅管理员可见） -->
+          <Select
+            v-if="isAdmin"
+            :model-value="filterProvider"
+            @update:model-value="$emit('update:filterProvider', $event)"
           >
-            {{ provider }}
-          </SelectItem>
-        </SelectContent>
-      </Select>
+            <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-32 h-8 text-xs border-border/60">
+              <SelectValue placeholder="提供商" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="__all__">
+                全部提供商
+              </SelectItem>
+              <SelectItem
+                v-for="provider in availableProviders"
+                :key="provider"
+                :value="provider"
+              >
+                {{ provider }}
+              </SelectItem>
+            </SelectContent>
+          </Select>
 
-      <!-- API格式筛选 -->
-      <Select
-
-        :model-value="filterApiFormat"
-        @update:model-value="$emit('update:filterApiFormat', $event)"
-      >
-        <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-32 h-8 text-xs border-border/60">
-          <SelectValue placeholder="格式" />
-        </SelectTrigger>
-        <SelectContent>
-          <SelectItem value="__all__">
-            全部格式
-          </SelectItem>
-          <SelectItem
-            v-for="format in availableApiFormats"
-            :key="format.value"
-            :value="format.value"
+          <!-- API格式筛选 -->
+          <Select
+            :model-value="filterApiFormat"
+            @update:model-value="$emit('update:filterApiFormat', $event)"
           >
-            {{ format.label }}
-          </SelectItem>
-        </SelectContent>
-      </Select>
+            <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-32 h-8 text-xs border-border/60">
+              <SelectValue placeholder="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
+          <!-- 状态筛选 -->
+          <Select
+            :model-value="filterStatus"
+            @update:model-value="$emit('update:filterStatus', $event)"
+          >
+            <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-28 h-8 text-xs border-border/60">
+              <SelectValue placeholder="状态" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="__all__">
+                全部状态
+              </SelectItem>
+              <SelectItem value="stream">
+                流式
+              </SelectItem>
+              <SelectItem value="standard">
+                标准
+              </SelectItem>
+              <SelectItem value="active">
+                活跃
+              </SelectItem>
+              <SelectItem value="failed">
+                失败
+              </SelectItem>
+              <SelectItem value="cancelled">
+                已取消
+              </SelectItem>
+              <SelectItem value="has_retry">
+                发生重试
+              </SelectItem>
+              <SelectItem value="has_fallback">
+                发生转移
+              </SelectItem>
+            </SelectContent>
+          </Select>
 
-        :model-value="filterStatus"
-        @update:model-value="$emit('update:filterStatus', $event)"
-      >
-        <SelectTrigger class="flex-1 min-w-0 sm:flex-none sm:w-28 h-8 text-xs border-border/60">
-          <SelectValue placeholder="状态" />
-        </SelectTrigger>
-        <SelectContent>
-          <SelectItem value="__all__">
-            全部状态
-          </SelectItem>
-          <SelectItem value="stream">
-            流式
-          </SelectItem>
-          <SelectItem value="standard">
-            标准
-          </SelectItem>
-          <SelectItem value="active">
-            活跃
-          </SelectItem>
-          <SelectItem value="failed">
-            失败
-          </SelectItem>
-          <SelectItem value="cancelled">
-            已取消
-          </SelectItem>
-          <SelectItem value="has_retry">
-            发生重试
-          </SelectItem>
-          <SelectItem value="has_fallback">
-            发生转移
-          </SelectItem>
-        </SelectContent>
-      </Select>
+          <!-- 分隔线 -->
+          <div class="hidden sm:block h-4 w-px bg-border" />
 
-      <!-- 分隔线 -->
-      <div class="hidden sm:block h-4 w-px bg-border" />
-
-      <!-- 自动刷新按钮 -->
-      <Button
-        variant="ghost"
-        size="icon"
-        class="h-8 w-8"
-        :class="autoRefresh ? 'text-primary' : ''"
-        :title="autoRefresh ? '点击关闭自动刷新' : '点击开启自动刷新（每3秒刷新）'"
-        @click="$emit('update:autoRefresh', !autoRefresh)"
-      >
-        <RefreshCcw
-          class="w-3.5 h-3.5"
-          :class="autoRefresh ? 'animate-spin' : ''"
-        />
-      </Button>
+          <!-- 自动刷新按钮 -->
+          <Button
+            variant="ghost"
+            size="icon"
+            class="h-8 w-8"
+            :class="autoRefresh ? 'text-primary' : ''"
+            :title="autoRefresh ? '点击关闭自动刷新' : '点击开启自动刷新（每3秒刷新）'"
+            @click="$emit('update:autoRefresh', !autoRefresh)"
+          >
+            <RefreshCcw
+              class="w-3.5 h-3.5"
+              :class="autoRefresh ? 'animate-spin' : ''"
+            />
+          </Button>
     </template>
 
     <!-- 移动端卡片视图 -->
@@ -288,43 +283,43 @@
     <Table class="hidden md:table">
       <TableHeader>
         <TableRow class="border-b border-border/60 hover:bg-transparent">
-          <TableHead class="h-12 font-semibold w-[70px]">
+          <TableHead class="h-12 font-semibold w-[68px]">
             时间
           </TableHead>
           <TableHead
             v-if="isAdmin"
-            class="h-12 font-semibold w-[100px]"
+            class="h-12 font-semibold"
           >
             用户
           </TableHead>
           <TableHead
             v-if="!isAdmin"
-            class="h-12 font-semibold w-[100px]"
+            class="h-12 font-semibold"
           >
             密钥
           </TableHead>
-          <TableHead class="h-12 font-semibold w-[140px]">
+          <TableHead class="h-12 font-semibold">
             模型
           </TableHead>
           <TableHead
             v-if="isAdmin"
-            class="h-12 font-semibold w-[100px]"
+            class="h-12 font-semibold"
           >
             提供商
           </TableHead>
           <TableHead class="h-12 font-semibold w-[120px]">
-            API格式
+            <div class="flex flex-col text-xs gap-0.5">
+              <span>格式</span>
+              <span class="text-muted-foreground font-normal">类型</span>
+            </div>
           </TableHead>
-          <TableHead class="h-12 font-semibold w-[70px] text-center">
-            类型
-          </TableHead>
-          <TableHead class="h-12 font-semibold w-[140px] text-right">
+          <TableHead class="h-12 font-semibold w-[110px] text-right">
             Tokens
           </TableHead>
-          <TableHead class="h-12 font-semibold w-[100px] text-right">
+          <TableHead class="h-12 font-semibold w-[72px] text-right">
             费用
           </TableHead>
-          <TableHead class="h-12 font-semibold w-[70px] text-right">
+          <TableHead class="h-12 font-semibold w-[68px] text-right">
             <div class="flex flex-col items-end text-xs gap-0.5">
               <span>首字</span>
               <span class="text-muted-foreground font-normal">总耗时</span>
@@ -335,7 +330,7 @@
       <TableBody>
         <TableRow v-if="records.length === 0">
           <TableCell
-            :colspan="isAdmin ? 9 : 8"
+            :colspan="isAdmin ? 8 : 7"
             class="text-center py-12 text-muted-foreground"
           >
             暂无请求记录
@@ -349,12 +344,12 @@
           @mousedown="handleMouseDown"
           @click="handleRowClick($event, record.id)"
         >
-          <TableCell class="text-xs py-4 w-[70px]">
+          <TableCell class="text-xs py-4 w-[68px]">
             {{ formatDateTime(record.created_at) }}
           </TableCell>
           <TableCell
             v-if="isAdmin"
-            class="py-4 w-[100px] truncate"
+            class="py-4 truncate"
             :title="record.username || record.user_email || (record.user_id ? `User ${record.user_id}` : '已删除用户')"
           >
             <div class="flex flex-col text-xs gap-0.5">
@@ -373,7 +368,7 @@
           <!-- 用户页面的密钥列 -->
           <TableCell
             v-if="!isAdmin"
-            class="py-4 w-[100px]"
+            class="py-4"
             :title="record.api_key?.name || '-'"
           >
             <div class="flex flex-col text-xs gap-0.5">
@@ -387,7 +382,7 @@
             </div>
           </TableCell>
           <TableCell
-            class="font-medium py-4 w-[140px]"
+            class="font-medium py-4"
             :title="getModelTooltip(record)"
           >
             <div
@@ -413,12 +408,12 @@
             </div>
             <span
               v-else
-              class="truncate block"
+              class="truncate block text-xs"
             >{{ record.model }}</span>
           </TableCell>
           <TableCell
             v-if="isAdmin"
-            class="py-4 w-[60px]"
+            class="py-4"
           >
             <div class="flex items-center gap-1">
               <div class="flex flex-col text-xs gap-0.5">
@@ -473,16 +468,17 @@
               </svg>
             </div>
           </TableCell>
+          <!-- 格式 + 类型（合并列） -->
           <TableCell
             class="py-4 w-[120px]"
             :title="getApiFormatTooltip(record)"
           >
-            <!-- 有格式转换或同族格式差异：两行显示 -->
-            <div
-              v-if="shouldShowFormatConversion(record)"
-              class="flex flex-col text-xs gap-0.5"
-            >
-              <div class="flex items-center gap-1 whitespace-nowrap">
+            <div class="flex flex-col text-xs gap-0.5">
+              <!-- 格式信息 -->
+              <div
+                v-if="shouldShowFormatConversion(record)"
+                class="flex items-center gap-1 whitespace-nowrap"
+              >
                 <span>{{ formatApiFormat(record.api_format!) }}</span>
                 <svg
                   xmlns="http://www.w3.org/2000/svg"
@@ -496,65 +492,64 @@
                     clip-rule="evenodd"
                   />
                 </svg>
+                <span class="text-muted-foreground">{{ formatApiFormat(record.endpoint_api_format!) }}</span>
+              </div>
+              <span
+                v-else-if="record.api_format"
+                class="whitespace-nowrap"
+              >{{ formatApiFormat(record.api_format) }}</span>
+              <span
+                v-else
+                class="text-muted-foreground"
+              >-</span>
+              <!-- 类型 badge -->
+              <div>
+                <Badge
+                  v-if="record.status === 'pending'"
+                  variant="outline"
+                  class="whitespace-nowrap animate-pulse border-muted-foreground/30 text-muted-foreground text-[10px] px-1.5 h-4"
+                >
+                  等待中
+                </Badge>
+                <Badge
+                  v-else-if="record.status === 'streaming'"
+                  variant="outline"
+                  class="whitespace-nowrap animate-pulse border-primary/50 text-primary text-[10px] px-1.5 h-4"
+                >
+                  传输中
+                </Badge>
+                <Badge
+                  v-else-if="record.status === 'failed' || (record.status_code && record.status_code >= 400) || record.error_message"
+                  variant="destructive"
+                  class="whitespace-nowrap text-[10px] px-1.5 h-4"
+                >
+                  失败
+                </Badge>
+                <Badge
+                  v-else-if="record.status === 'cancelled'"
+                  variant="outline"
+                  class="whitespace-nowrap border-amber-500/50 text-amber-600 dark:text-amber-400 text-[10px] px-1.5 h-4"
+                >
+                  已取消
+                </Badge>
+                <Badge
+                  v-else-if="record.is_stream"
+                  variant="secondary"
+                  class="whitespace-nowrap text-[10px] px-1.5 h-4"
+                >
+                  流式
+                </Badge>
+                <Badge
+                  v-else
+                  variant="outline"
+                  class="whitespace-nowrap border-border/60 text-muted-foreground text-[10px] px-1.5 h-4"
+                >
+                  标准
+                </Badge>
               </div>
-              <span class="text-muted-foreground whitespace-nowrap">{{ formatApiFormat(record.endpoint_api_format!) }}</span>
             </div>
-            <!-- 无格式转换：单行显示 -->
-            <span
-              v-else-if="record.api_format"
-              class="text-xs whitespace-nowrap"
-            >{{ formatApiFormat(record.api_format) }}</span>
-            <span
-              v-else
-              class="text-muted-foreground text-xs"
-            >-</span>
           </TableCell>
-          <TableCell class="text-center py-4 w-[70px]">
-            <!-- 优先显示请求状态 -->
-            <Badge
-              v-if="record.status === 'pending'"
-              variant="outline"
-              class="whitespace-nowrap animate-pulse border-muted-foreground/30 text-muted-foreground"
-            >
-              等待中
-            </Badge>
-            <Badge
-              v-else-if="record.status === 'streaming'"
-              variant="outline"
-              class="whitespace-nowrap animate-pulse border-primary/50 text-primary"
-            >
-              传输中
-            </Badge>
-            <Badge
-              v-else-if="record.status === 'failed' || (record.status_code && record.status_code >= 400) || record.error_message"
-              variant="destructive"
-              class="whitespace-nowrap"
-            >
-              失败
-            </Badge>
-            <Badge
-              v-else-if="record.status === 'cancelled'"
-              variant="outline"
-              class="whitespace-nowrap border-amber-500/50 text-amber-600 dark:text-amber-400"
-            >
-              已取消
-            </Badge>
-            <Badge
-              v-else-if="record.is_stream"
-              variant="secondary"
-              class="whitespace-nowrap"
-            >
-              流式
-            </Badge>
-            <Badge
-              v-else
-              variant="outline"
-              class="whitespace-nowrap border-border/60 text-muted-foreground"
-            >
-              标准
-            </Badge>
-          </TableCell>
-          <TableCell class="text-right py-4 w-[140px]">
+          <TableCell class="text-right py-4 w-[110px]">
             <div class="flex flex-col items-end text-xs gap-0.5">
               <div class="flex items-center gap-1">
                 <span>{{ formatTokens(record.input_tokens || 0) }}</span>
@@ -568,7 +563,7 @@
               </div>
             </div>
           </TableCell>
-          <TableCell class="text-right py-4 w-[100px]">
+          <TableCell class="text-right py-4 w-[72px]">
             <div class="flex flex-col items-end text-xs gap-0.5">
               <span class="text-primary font-medium">{{ formatCurrency(record.cost || 0) }}</span>
               <span
@@ -579,7 +574,7 @@
               </span>
             </div>
           </TableCell>
-          <TableCell class="text-right py-4 w-[70px]">
+          <TableCell class="text-right py-4 w-[68px]">
             <!-- pending 状态：只显示增长的总时间 -->
             <div
               v-if="record.status === 'pending'"

frontend/src/layouts/MainLayout.vue

@@ -266,6 +266,8 @@
                 {{ crumb.label }}
               </span>
             </template>
+            <!-- 页面级操作插入点 -->
+            <div id="breadcrumb-actions" />
           </div>
         </div>
 
@@ -279,6 +281,8 @@
         </div>
 
         <div class="flex items-center gap-2">
+          <!-- Page-level header actions (right side) -->
+          <div id="header-actions-right" class="flex items-center" />
           <!-- Theme Toggle -->
           <button
             class="flex h-9 w-9 items-center justify-center rounded-lg text-muted-foreground hover:text-foreground hover:bg-muted/50 transition"

frontend/src/views/shared/Usage.vue

@@ -1,55 +1,79 @@
 <template>
   <div class="space-y-6 pb-8">
-    <!-- 活跃度热图 + 请求间隔时间线 -->
-    <div class="grid grid-cols-1 xl:grid-cols-2 gap-4">
-      <ActivityHeatmapCard
-        :data="activityHeatmapData"
-        :title="isAdminPage ? '总体活跃天数' : '我的活跃天数'"
-        :is-loading="isLoadingHeatmap"
-        :has-error="heatmapError"
-      />
-      <IntervalTimelineCard
-        :title="isAdminPage ? '请求间隔时间线' : '我的请求间隔'"
-        :is-admin="isAdminPage"
-        :hours="24"
-      />
+    <!-- 面包屑旁的折叠按钮 -->
+    <Teleport to="#header-actions-right" defer>
+      <button
+        class="flex h-9 w-9 items-center justify-center rounded-lg text-muted-foreground hover:text-foreground hover:bg-muted/50 transition"
+        :title="statsExpanded ? '收起用量分析' : '展开用量分析'"
+        @click="statsExpanded = !statsExpanded"
+      >
+        <PanelTopClose
+          v-if="statsExpanded"
+          class="h-4 w-4"
+        />
+        <PanelTopOpen
+          v-else
+          class="h-4 w-4"
+        />
+      </button>
+    </Teleport>
+
+    <!-- 用量分析面板（可折叠） -->
+    <div
+      v-if="statsExpanded"
+      class="space-y-4"
+    >
+      <!-- 活跃度热图 + 请求间隔时间线 -->
+      <div class="grid grid-cols-1 xl:grid-cols-2 gap-4">
+        <ActivityHeatmapCard
+          :data="activityHeatmapData"
+          :title="isAdminPage ? '总体活跃天数' : '我的活跃天数'"
+          :is-loading="isLoadingHeatmap"
+          :has-error="heatmapError"
+        />
+        <IntervalTimelineCard
+          :title="isAdminPage ? '请求间隔时间线' : '我的请求间隔'"
+          :is-admin="isAdminPage"
+          :hours="24"
+        />
+      </div>
+
+      <!-- 分析统计 -->
+      <!-- 管理员：模型 + 提供商 + API格式（3列） -->
+      <div
+        v-if="isAdminPage"
+        class="grid grid-cols-1 lg:grid-cols-3 gap-4"
+      >
+        <UsageModelTable
+          :data="enhancedModelStats"
+          :is-admin="authStore.isAdmin"
+        />
+        <UsageProviderTable
+          :data="providerStats"
+          :is-admin="authStore.isAdmin"
+        />
+        <UsageApiFormatTable
+          :data="apiFormatStats"
+          :is-admin="authStore.isAdmin"
+        />
+      </div>
+      <!-- 用户：模型 + API格式（2列） -->
+      <div
+        v-else
+        class="grid grid-cols-1 lg:grid-cols-2 gap-4"
+      >
+        <UsageModelTable
+          :data="enhancedModelStats"
+          :is-admin="authStore.isAdmin"
+        />
+        <UsageApiFormatTable
+          :data="apiFormatStats"
+          :is-admin="false"
+        />
+      </div>
     </div>
 
-    <!-- 分析统计 -->
-    <!-- 管理员：模型 + 提供商 + API格式（3列） -->
-    <div
-      v-if="isAdminPage"
-      class="grid grid-cols-1 lg:grid-cols-3 gap-4"
-    >
-      <UsageModelTable
-        :data="enhancedModelStats"
-        :is-admin="authStore.isAdmin"
-      />
-      <UsageProviderTable
-        :data="providerStats"
-        :is-admin="authStore.isAdmin"
-      />
-      <UsageApiFormatTable
-        :data="apiFormatStats"
-        :is-admin="authStore.isAdmin"
-      />
-    </div>
-    <!-- 用户：模型 + API格式（2列） -->
-    <div
-      v-else
-      class="grid grid-cols-1 lg:grid-cols-2 gap-4"
-    >
-      <UsageModelTable
-        :data="enhancedModelStats"
-        :is-admin="authStore.isAdmin"
-      />
-      <UsageApiFormatTable
-        :data="apiFormatStats"
-        :is-admin="false"
-      />
-    </div>
-
-    <!-- 请求详情 -->
+    <!-- 使用记录 -->
     <UsageRecordsTable
       :records="displayRecords"
       :is-admin="isAdminPage"
@@ -97,10 +121,12 @@
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted, watch } from 'vue'
 import { useRoute } from 'vue-router'
+import { useLocalStorage } from '@vueuse/core'
 import { useAuthStore } from '@/stores/auth'
 import { usageApi } from '@/api/usage'
 import { usersApi } from '@/api/users'
 import { meApi } from '@/api/me'
+import { PanelTopClose, PanelTopOpen } from 'lucide-vue-next'
 import {
   UsageModelTable,
   UsageProviderTable,
@@ -127,6 +153,9 @@ const authStore = useAuthStore()
 // 判断是否是管理员页面
 const isAdminPage = computed(() => route.path.startsWith('/admin'))
 
+// 用量分析面板折叠状态（默认展开，持久化到 localStorage）
+const statsExpanded = useLocalStorage('usage-stats-expanded', true)
+
 // 时间范围选择
 const timeRange = ref<DateRangeParams>(getDateRangeFromPeriod('today'))