feat: add Sora admin backend and fix type inconsistencies

Backend changes:
- Add SoraHandler for admin Sora management APIs
  - GET /api/v1/admin/sora/stats - system statistics
  - GET /api/v1/admin/sora/users - user storage stats
  - GET /api/v1/admin/sora/generations - generation records
  - DELETE /api/v1/admin/sora/users/:id/storage - clear user storage
- Add sora_storage_quota_bytes to AdminUser DTO
- Add SoraStorageQuotaBytes to UpdateUserInput for admin user updates
- Add comprehensive tests for SoraHandler

Frontend changes:
- Add soraAdminAPI for Sora management
- Add sora_storage_quota_bytes and sora_storage_used_bytes to AdminUser type
- Add Sora storage quota field to UserEditModal (GB unit)
- Fix UsageLog type: add media_type, fix duration_ms to optional
- Fix AdminUsageLog type: add channel_id, billing_tier

Test fixes:
- Add window.matchMedia mock to AccountUsageCell.spec.ts
- Add tlsFingerprintProfileAPI mock to EditAccountModal.spec.ts
- Fix loadTLSProfiles function order in EditAccountModal.vue
- Fix translation key references in AccountStatusIndicator.spec.ts

frontend/src/types/index.ts

@@ -45,6 +45,10 @@ export interface AdminUser extends User {
   group_rates?: Record<number, number>
   // 当前并发数（仅管理员列表接口返回）
   current_concurrency?: number
+  // Sora 存储配额（单位：字节，0 表示使用分组或系统默认配额）
+  sora_storage_quota_bytes: number
+  // Sora 存储已用字节
+  sora_storage_used_bytes: number
 }
 
 export interface LoginRequest {
@@ -1016,12 +1020,13 @@ export interface UsageLog {
   request_type?: UsageRequestType
   stream: boolean
   openai_ws_mode?: boolean
-  duration_ms: number
+  duration_ms: number | null
   first_token_ms: number | null
 
   // 图片生成字段
   image_count: number
   image_size: string | null
+  media_type?: string | null
 
   // User-Agent
   user_agent: string | null
@@ -1049,6 +1054,12 @@ export interface AdminUsageLog extends UsageLog {
   upstream_model?: string | null
   model_mapping_chain?: string | null
 
+  // 渠道 ID
+  channel_id?: number | null
+
+  // 计费层级标签（per_request/image 模式）
+  billing_tier?: string | null
+
   // 账号计费倍率（仅管理员可见）
   account_rate_multiplier?: number | null