feat(admin): Complete Phase 3.5.1-3.5.4 Prompt Management System (83%)

Summary:
- Implement Prompt management infrastructure and core services
- Build admin portal frontend with light theme
- Integrate CodeMirror 6 editor for non-technical users

Phase 3.5.1: Infrastructure Setup
- Create capability_schema for Prompt storage
- Add prompt_templates and prompt_versions tables
- Add prompt:view/edit/debug/publish permissions
- Migrate RVW prompts to database (RVW_EDITORIAL, RVW_METHODOLOGY)

Phase 3.5.2: PromptService Core
- Implement gray preview logic (DRAFT for debuggers, ACTIVE for users)
- Module-level debug control (setDebugMode)
- Handlebars template rendering
- Variable extraction and validation (extractVariables, validateVariables)
- Three-level disaster recovery (database -> cache -> hardcoded fallback)

Phase 3.5.3: Management API
- 8 RESTful endpoints (/api/admin/prompts/*)
- Permission control (PROMPT_ENGINEER can edit, SUPER_ADMIN can publish)

Phase 3.5.4: Frontend Management UI
- Build admin portal architecture (AdminLayout, OrgLayout)
- Add route system (/admin/*, /org/*)
- Implement PromptListPage (filter, search, debug switch)
- Implement PromptEditor (CodeMirror 6 simplified for clinical users)
- Implement PromptEditorPage (edit, save, publish, test, version history)

Technical Details:
- Backend: 6 files, ~2044 lines (prompt.service.ts 596 lines)
- Frontend: 9 files, ~1735 lines (PromptEditorPage.tsx 399 lines)
- CodeMirror 6: Line numbers, auto-wrap, variable highlight, search, undo/redo
- Chinese-friendly: 15px font, 1.8 line-height, system fonts

Next Step: Phase 3.5.5 - Integrate RVW module with PromptService

Tested: Backend API tests passed (8/8), Frontend pending user testing
Status: Ready for Phase 3.5.5 RVW integration

backend/src/common/auth/index.ts

@@ -0,0 +1,35 @@
+/**
+ * Auth Module
+ * 
+ * 认证模块导出
+ */
+
+// JWT Service
+export { jwtService, JWTService } from './jwt.service.js';
+export type { JWTPayload, TokenResponse, DecodedToken } from './jwt.service.js';
+
+// Auth Service
+export { authService, AuthService } from './auth.service.js';
+export type { 
+  PasswordLoginRequest,
+  VerificationCodeLoginRequest,
+  ChangePasswordRequest,
+  UserInfoResponse,
+  LoginResponse,
+} from './auth.service.js';
+
+// Auth Middleware
+export {
+  authenticate,
+  optionalAuthenticate,
+  requireRoles,
+  requirePermission,
+  requireSameTenant,
+  registerAuthPlugin,
+  AuthenticationError,
+  AuthorizationError,
+} from './auth.middleware.js';
+
+// Auth Routes
+export { authRoutes } from './auth.routes.js';
+