feat: 用户导出支持独立余额Key，新增系统版本接口

- 用户导出/导入支持独立余额 Key (standalone_keys)
- API Key 导出增加 expires_at 字段
- 新增 /api/admin/system/version 接口获取版本信息
- 前端系统设置页面显示当前版本
- 移除导入对话框中多余的 bg-muted 背景样式

frontend/src/api/admin.ts

@@ -13,6 +13,7 @@ export interface UsersExportData {
   version: string
   exported_at: string
   users: UserExport[]
+  standalone_keys?: StandaloneKeyExport[]
 }
 
 export interface UserExport {
@@ -46,11 +47,15 @@ export interface UserApiKeyExport {
   concurrent_limit?: number | null
   force_capabilities?: any
   is_active: boolean
+  expires_at?: string | null
   auto_delete_on_expiry?: boolean
   total_requests?: number
   total_cost_usd?: number
 }
 
+// 独立余额 Key 导出结构（与 UserApiKeyExport 相同，但不包含 is_standalone）
+export type StandaloneKeyExport = Omit<UserApiKeyExport, 'is_standalone'>
+
 export interface GlobalModelExport {
   name: string
   display_name: string
@@ -189,6 +194,7 @@ export interface UsersImportResponse {
   stats: {
     users: { created: number; updated: number; skipped: number }
     api_keys: { created: number; skipped: number }
+    standalone_keys?: { created: number; skipped: number }
     errors: string[]
   }
 }
@@ -473,5 +479,13 @@ export const adminApi = {
       `/api/admin/system/email/templates/${templateType}/reset`
     )
     return response.data
+  },
+
+  // 获取系统版本信息
+  async getSystemVersion(): Promise<{ version: string }> {
+    const response = await apiClient.get<{ version: string }>(
+      '/api/admin/system/version'
+    )
+    return response.data
   }
 }

frontend/src/views/admin/SystemSettings.vue

@@ -464,6 +464,30 @@
           </div>
         </div>
       </CardSection>
+
+      <!-- 系统版本信息 -->
+      <CardSection
+        title="系统信息"
+        description="当前系统版本和构建信息"
+      >
+        <div class="flex items-center gap-4">
+          <div class="flex items-center gap-2">
+            <Label class="text-sm font-medium text-muted-foreground">版本:</Label>
+            <span
+              v-if="systemVersion"
+              class="text-sm font-mono"
+            >
+              {{ systemVersion }}
+            </span>
+            <span
+              v-else
+              class="text-sm text-muted-foreground"
+            >
+              加载中...
+            </span>
+          </div>
+        </div>
+      </CardSection>
     </div>
 
     <!-- 导入配置对话框 -->
@@ -475,7 +499,7 @@
       <div class="space-y-4">
         <div
           v-if="importPreview"
-          class="p-3 bg-muted rounded-lg text-sm"
+          class="text-sm"
         >
           <p class="font-medium mb-2">
             配置预览
@@ -557,7 +581,7 @@
         class="space-y-4"
       >
         <div class="grid grid-cols-2 gap-4 text-sm">
-          <div class="p-3 bg-muted rounded-lg">
+          <div>
             <p class="font-medium">
               全局模型
             </p>
@@ -567,7 +591,7 @@
               跳过: {{ importResult.stats.global_models.skipped }}
             </p>
           </div>
-          <div class="p-3 bg-muted rounded-lg">
+          <div>
             <p class="font-medium">
               提供商
             </p>
@@ -577,7 +601,7 @@
               跳过: {{ importResult.stats.providers.skipped }}
             </p>
           </div>
-          <div class="p-3 bg-muted rounded-lg">
+          <div>
             <p class="font-medium">
               端点
             </p>
@@ -587,7 +611,7 @@
               跳过: {{ importResult.stats.endpoints.skipped }}
             </p>
           </div>
-          <div class="p-3 bg-muted rounded-lg">
+          <div>
             <p class="font-medium">
               API Keys
             </p>
@@ -596,7 +620,7 @@
               跳过: {{ importResult.stats.keys.skipped }}
             </p>
           </div>
-          <div class="p-3 bg-muted rounded-lg col-span-2">
+          <div class="col-span-2">
             <p class="font-medium">
               模型配置
             </p>
@@ -642,7 +666,7 @@
       <div class="space-y-4">
         <div
           v-if="importUsersPreview"
-          class="p-3 bg-muted rounded-lg text-sm"
+          class="text-sm"
         >
           <p class="font-medium mb-2">
             数据预览
@@ -652,6 +676,9 @@
             <li>
               API Keys: {{ importUsersPreview.users?.reduce((sum: number, u: any) => sum + (u.api_keys?.length || 0), 0) }} 个
             </li>
+            <li v-if="importUsersPreview.standalone_keys?.length">
+              独立余额 Keys: {{ importUsersPreview.standalone_keys.length }} 个
+            </li>
           </ul>
         </div>
 
@@ -720,7 +747,7 @@
         class="space-y-4"
       >
         <div class="grid grid-cols-2 gap-4 text-sm">
-          <div class="p-3 bg-muted rounded-lg">
+          <div>
             <p class="font-medium">
               用户
             </p>
@@ -730,7 +757,7 @@
               跳过: {{ importUsersResult.stats.users.skipped }}
             </p>
           </div>
-          <div class="p-3 bg-muted rounded-lg">
+          <div>
             <p class="font-medium">
               API Keys
             </p>
@@ -739,6 +766,18 @@
               跳过: {{ importUsersResult.stats.api_keys.skipped }}
             </p>
           </div>
+          <div
+            v-if="importUsersResult.stats.standalone_keys"
+            class="col-span-2"
+          >
+            <p class="font-medium">
+              独立余额 Keys
+            </p>
+            <p class="text-muted-foreground">
+              创建: {{ importUsersResult.stats.standalone_keys.created }},
+              跳过: {{ importUsersResult.stats.standalone_keys.skipped }}
+            </p>
+          </div>
         </div>
 
         <div
@@ -839,6 +878,9 @@ const importUsersResult = ref<UsersImportResponse | null>(null)
 const usersMergeMode = ref<'skip' | 'overwrite' | 'error'>('skip')
 const usersMergeModeSelectOpen = ref(false)
 
+// 系统版本信息
+const systemVersion = ref<string>('')
+
 const systemConfig = ref<SystemConfig>({
   // 基础配置
   default_user_quota_usd: 10.0,
@@ -890,9 +932,21 @@ const sensitiveHeadersStr = computed({
 })
 
 onMounted(async () => {
-  await loadSystemConfig()
+  await Promise.all([
+    loadSystemConfig(),
+    loadSystemVersion()
+  ])
 })
 
+async function loadSystemVersion() {
+  try {
+    const data = await adminApi.getSystemVersion()
+    systemVersion.value = data.version
+  } catch (err) {
+    log.error('加载系统版本失败:', err)
+  }
+}
+
 async function loadSystemConfig() {
   try {
     const configs = [
@@ -1178,12 +1232,6 @@ function handleUsersFileSelect(event: Event) {
       const content = e.target?.result as string
       const data = JSON.parse(content) as UsersExportData
 
-      // 验证版本
-      if (data.version !== '1.0') {
-        error(`不支持的配置版本: ${data.version}`)
-        return
-      }
-
       importUsersPreview.value = data
       usersMergeMode.value = 'skip'
       importUsersDialogOpen.value = true

src/api/admin/system.py

@@ -1,5 +1,7 @@
 """系统设置API端点。"""
 
+from __future__ import annotations
+
 from dataclasses import dataclass
 from typing import Optional
 
@@ -17,6 +19,46 @@ from src.services.email.email_template import EmailTemplate
 from src.services.system.config import SystemConfigService
 
 router = APIRouter(prefix="/api/admin/system", tags=["Admin - System"])
+
+
+def _get_version_from_git() -> str | None:
+    """从 git describe 获取版本号"""
+    import subprocess
+
+    try:
+        result = subprocess.run(
+            ["git", "describe", "--tags", "--always"],
+            capture_output=True,
+            text=True,
+            timeout=5,
+        )
+        if result.returncode == 0:
+            version = result.stdout.strip()
+            if version.startswith("v"):
+                version = version[1:]
+            return version
+    except Exception:
+        pass
+    return None
+
+
+@router.get("/version")
+async def get_system_version():
+    """获取系统版本信息"""
+    # 优先从 git 获取
+    version = _get_version_from_git()
+    if version:
+        return {"version": version}
+
+    # 回退到静态版本文件
+    try:
+        from src._version import __version__
+
+        return {"version": __version__}
+    except ImportError:
+        return {"version": "unknown"}
+
+
 pipeline = ApiRequestPipeline()
 
 
@@ -950,6 +992,31 @@ class AdminExportUsersAdapter(AdminApiAdapter):
 
         db = context.db
 
+        def _serialize_api_key(key: ApiKey, include_is_standalone: bool = False) -> dict:
+            """序列化 API Key 为导出格式"""
+            data = {
+                "key_hash": key.key_hash,
+                "key_encrypted": key.key_encrypted,
+                "name": key.name,
+                "balance_used_usd": key.balance_used_usd,
+                "current_balance_usd": key.current_balance_usd,
+                "allowed_providers": key.allowed_providers,
+                "allowed_endpoints": key.allowed_endpoints,
+                "allowed_api_formats": key.allowed_api_formats,
+                "allowed_models": key.allowed_models,
+                "rate_limit": key.rate_limit,
+                "concurrent_limit": key.concurrent_limit,
+                "force_capabilities": key.force_capabilities,
+                "is_active": key.is_active,
+                "expires_at": key.expires_at.isoformat() if key.expires_at else None,
+                "auto_delete_on_expiry": key.auto_delete_on_expiry,
+                "total_requests": key.total_requests,
+                "total_cost_usd": key.total_cost_usd,
+            }
+            if include_is_standalone:
+                data["is_standalone"] = key.is_standalone
+            return data
+
         # 导出 Users（排除管理员）
         users = db.query(User).filter(
             User.is_deleted.is_(False),
@@ -957,31 +1024,12 @@ class AdminExportUsersAdapter(AdminApiAdapter):
         ).all()
         users_data = []
         for user in users:
-            # 导出用户的 API Keys（保留加密数据）
-            api_keys = db.query(ApiKey).filter(ApiKey.user_id == user.id).all()
-            api_keys_data = []
-            for key in api_keys:
-                api_keys_data.append(
-                    {
-                        "key_hash": key.key_hash,
-                        "key_encrypted": key.key_encrypted,
-                        "name": key.name,
-                        "is_standalone": key.is_standalone,
-                        "balance_used_usd": key.balance_used_usd,
-                        "current_balance_usd": key.current_balance_usd,
-                        "allowed_providers": key.allowed_providers,
-                        "allowed_endpoints": key.allowed_endpoints,
-                        "allowed_api_formats": key.allowed_api_formats,
-                        "allowed_models": key.allowed_models,
-                        "rate_limit": key.rate_limit,
-                        "concurrent_limit": key.concurrent_limit,
-                        "force_capabilities": key.force_capabilities,
-                        "is_active": key.is_active,
-                        "auto_delete_on_expiry": key.auto_delete_on_expiry,
-                        "total_requests": key.total_requests,
-                        "total_cost_usd": key.total_cost_usd,
-                    }
-                )
+            # 导出用户的 API Keys（排除独立余额Key，独立Key单独导出）
+            api_keys = db.query(ApiKey).filter(
+                ApiKey.user_id == user.id,
+                ApiKey.is_standalone.is_(False)
+            ).all()
+            api_keys_data = [_serialize_api_key(key, include_is_standalone=True) for key in api_keys]
 
             users_data.append(
                 {
@@ -1001,10 +1049,15 @@ class AdminExportUsersAdapter(AdminApiAdapter):
                 }
             )
 
+        # 导出独立余额 Keys（管理员创建的，不属于普通用户）
+        standalone_keys = db.query(ApiKey).filter(ApiKey.is_standalone.is_(True)).all()
+        standalone_keys_data = [_serialize_api_key(key) for key in standalone_keys]
+
         return {
-            "version": "1.0",
+            "version": "1.1",
             "exported_at": datetime.now(timezone.utc).isoformat(),
             "users": users_data,
+            "standalone_keys": standalone_keys_data,
         }
 
 
@@ -1024,21 +1077,72 @@ class AdminImportUsersAdapter(AdminApiAdapter):
         db = context.db
         payload = context.ensure_json_body()
 
-        # 验证配置版本
-        version = payload.get("version")
-        if version != "1.0":
-            raise InvalidRequestException(f"不支持的配置版本: {version}")
-
         # 获取导入选项
         merge_mode = payload.get("merge_mode", "skip")  # skip, overwrite, error
         users_data = payload.get("users", [])
+        standalone_keys_data = payload.get("standalone_keys", [])
 
         stats = {
             "users": {"created": 0, "updated": 0, "skipped": 0},
             "api_keys": {"created": 0, "skipped": 0},
+            "standalone_keys": {"created": 0, "skipped": 0},
             "errors": [],
         }
 
+        def _create_api_key_from_data(
+            key_data: dict,
+            owner_id: str,
+            is_standalone: bool = False,
+        ) -> tuple[ApiKey | None, str]:
+            """从导入数据创建 ApiKey 对象
+
+            Returns:
+                (ApiKey, "created"): 成功创建
+                (None, "skipped"): key 已存在，跳过
+                (None, "invalid"): 数据无效，跳过
+            """
+            key_hash = key_data.get("key_hash", "").strip()
+            if not key_hash:
+                return None, "invalid"
+
+            # 检查是否已存在
+            existing = db.query(ApiKey).filter(ApiKey.key_hash == key_hash).first()
+            if existing:
+                return None, "skipped"
+
+            # 解析 expires_at
+            expires_at = None
+            if key_data.get("expires_at"):
+                try:
+                    expires_at = datetime.fromisoformat(key_data["expires_at"])
+                except ValueError:
+                    stats["errors"].append(
+                        f"API Key '{key_data.get('name', key_hash[:8])}' 的 expires_at 格式无效"
+                    )
+
+            return ApiKey(
+                id=str(uuid.uuid4()),
+                user_id=owner_id,
+                key_hash=key_hash,
+                key_encrypted=key_data.get("key_encrypted"),
+                name=key_data.get("name"),
+                is_standalone=is_standalone or key_data.get("is_standalone", False),
+                balance_used_usd=key_data.get("balance_used_usd", 0.0),
+                current_balance_usd=key_data.get("current_balance_usd"),
+                allowed_providers=key_data.get("allowed_providers"),
+                allowed_endpoints=key_data.get("allowed_endpoints"),
+                allowed_api_formats=key_data.get("allowed_api_formats"),
+                allowed_models=key_data.get("allowed_models"),
+                rate_limit=key_data.get("rate_limit"),
+                concurrent_limit=key_data.get("concurrent_limit", 5),
+                force_capabilities=key_data.get("force_capabilities"),
+                is_active=key_data.get("is_active", True),
+                expires_at=expires_at,
+                auto_delete_on_expiry=key_data.get("auto_delete_on_expiry", False),
+                total_requests=key_data.get("total_requests", 0),
+                total_cost_usd=key_data.get("total_cost_usd", 0.0),
+            ), "created"
+
         try:
             for user_data in users_data:
                 # 跳过管理员角色的导入（不区分大小写）
@@ -1109,40 +1213,31 @@ class AdminImportUsersAdapter(AdminApiAdapter):
 
                 # 导入 API Keys
                 for key_data in user_data.get("api_keys", []):
-                    # 检查是否已存在相同的 key_hash
-                    if key_data.get("key_hash"):
-                        existing_key = (
-                            db.query(ApiKey)
-                            .filter(ApiKey.key_hash == key_data["key_hash"])
-                            .first()
-                        )
-                        if existing_key:
-                            stats["api_keys"]["skipped"] += 1
-                            continue
+                    new_key, status = _create_api_key_from_data(key_data, user_id)
+                    if new_key:
+                        db.add(new_key)
+                        stats["api_keys"]["created"] += 1
+                    elif status == "skipped":
+                        stats["api_keys"]["skipped"] += 1
+                    # invalid 数据不计入统计
 
-                    new_key = ApiKey(
-                        id=str(uuid.uuid4()),
-                        user_id=user_id,
-                        key_hash=key_data.get("key_hash", ""),
-                        key_encrypted=key_data.get("key_encrypted"),
-                        name=key_data.get("name"),
-                        is_standalone=key_data.get("is_standalone", False),
-                        balance_used_usd=key_data.get("balance_used_usd", 0.0),
-                        current_balance_usd=key_data.get("current_balance_usd"),
-                        allowed_providers=key_data.get("allowed_providers"),
-                        allowed_endpoints=key_data.get("allowed_endpoints"),
-                        allowed_api_formats=key_data.get("allowed_api_formats"),
-                        allowed_models=key_data.get("allowed_models"),
-                        rate_limit=key_data.get("rate_limit"),  # None = 无限制
-                        concurrent_limit=key_data.get("concurrent_limit", 5),
-                        force_capabilities=key_data.get("force_capabilities"),
-                        is_active=key_data.get("is_active", True),
-                        auto_delete_on_expiry=key_data.get("auto_delete_on_expiry", False),
-                        total_requests=key_data.get("total_requests", 0),
-                        total_cost_usd=key_data.get("total_cost_usd", 0.0),
-                    )
-                    db.add(new_key)
-                    stats["api_keys"]["created"] += 1
+            # 导入独立余额 Keys（需要找一个管理员用户作为 owner）
+            if standalone_keys_data:
+                # 查找一个管理员用户作为独立Key的owner
+                admin_user = db.query(User).filter(User.role == UserRole.ADMIN).first()
+                if not admin_user:
+                    stats["errors"].append("无法导入独立余额Key: 系统中没有管理员用户")
+                else:
+                    for key_data in standalone_keys_data:
+                        new_key, status = _create_api_key_from_data(
+                            key_data, admin_user.id, is_standalone=True
+                        )
+                        if new_key:
+                            db.add(new_key)
+                            stats["standalone_keys"]["created"] += 1
+                        elif status == "skipped":
+                            stats["standalone_keys"]["skipped"] += 1
+                        # invalid 数据不计入统计
 
             db.commit()