feat: add admin usage statistics and LLM configuration management

qwen3-tts-frontend/src/lib/api.ts

@@ -226,6 +226,61 @@ export const authApi = {
 
 }
 
+export interface BackendStats {
+  backend_type: string
+  job_count: number
+  char_count: number
+}
+
+export interface UserUsageStats {
+  user_id: number
+  username: string
+  email: string
+  llm_prompt_tokens: number
+  llm_completion_tokens: number
+  tts_backends: BackendStats[]
+}
+
+export const adminApi = {
+  setAliyunKey: async (apiKey: string): Promise<void> => {
+    await apiClient.post(API_ENDPOINTS.ADMIN.SET_ALIYUN_KEY, { api_key: apiKey })
+  },
+
+  deleteAliyunKey: async (): Promise<void> => {
+    await apiClient.delete(API_ENDPOINTS.ADMIN.SET_ALIYUN_KEY)
+  },
+
+  verifyAliyunKey: async (): Promise<{ valid: boolean; message: string }> => {
+    const response = await apiClient.get<{ valid: boolean; message: string }>(
+      API_ENDPOINTS.ADMIN.VERIFY_ALIYUN_KEY
+    )
+    return response.data
+  },
+
+  getLLMConfig: async (): Promise<{ base_url?: string; model?: string; has_key: boolean }> => {
+    const response = await apiClient.get<{ base_url?: string; model?: string; has_key: boolean }>(
+      API_ENDPOINTS.ADMIN.LLM_CONFIG
+    )
+    return response.data
+  },
+
+  setLLMConfig: async (config: { base_url: string; api_key: string; model: string }): Promise<void> => {
+    await apiClient.put(API_ENDPOINTS.ADMIN.LLM_CONFIG, config)
+  },
+
+  deleteLLMConfig: async (): Promise<void> => {
+    await apiClient.delete(API_ENDPOINTS.ADMIN.LLM_CONFIG)
+  },
+
+  getUsage: async (dateFrom?: string, dateTo?: string): Promise<UserUsageStats[]> => {
+    const params: Record<string, string> = {}
+    if (dateFrom) params.date_from = dateFrom
+    if (dateTo) params.date_to = dateTo
+    const response = await apiClient.get<UserUsageStats[]>('/admin/usage', { params })
+    return response.data
+  },
+}
+
 export const ttsApi = {
   getLanguages: async (): Promise<Language[]> => {
     const response = await apiClient.get<string[]>(API_ENDPOINTS.TTS.LANGUAGES)

qwen3-tts-frontend/src/lib/constants.ts

@@ -28,6 +28,11 @@ export const API_ENDPOINTS = {
     UPDATE: (id: number) => `/users/${id}`,
     DELETE: (id: number) => `/users/${id}`,
   },
+  ADMIN: {
+    SET_ALIYUN_KEY: '/users/system/aliyun-key',
+    VERIFY_ALIYUN_KEY: '/users/system/aliyun-key/verify',
+    LLM_CONFIG: '/users/system/llm-config',
+  },
   VOICE_DESIGNS: {
     LIST: '/voice-designs',
     CREATE: '/voice-designs',