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/index.ts

@@ -16,6 +16,8 @@ import { registerDCRoutes, initDCModule } from './modules/dc/index.js';
 import pkbRoutes from './modules/pkb/routes/index.js';
 import { registerHealthRoutes } from './common/health/index.js';
 import { logger } from './common/logging/index.js';
+import { authRoutes, registerAuthPlugin } from './common/auth/index.js';
+import { promptRoutes } from './common/prompt/index.js';
 import { registerTestRoutes } from './test-platform-api.js';
 import { registerScreeningWorkers } from './modules/asl/services/screeningWorker.js';
 import { registerExtractionWorkers } from './modules/dc/tool-b/workers/extractionWorker.js';
@@ -78,6 +80,19 @@ console.log('✅ 文件上传插件已配置: 最大文件大小 10MB');
 await registerHealthRoutes(fastify);
 logger.info('✅ 健康检查路由已注册');
 
+// ============================================
+// 【平台基础设施】认证模块
+// ============================================
+await registerAuthPlugin(fastify);
+await fastify.register(authRoutes, { prefix: '/api/v1/auth' });
+logger.info('✅ 认证路由已注册: /api/v1/auth');
+
+// ============================================
+// 【运营管理】Prompt管理模块
+// ============================================
+await fastify.register(promptRoutes, { prefix: '/api/admin/prompts' });
+logger.info('✅ Prompt管理路由已注册: /api/admin/prompts');
+
 // ============================================
 // 【临时】平台基础设施测试API
 // ============================================