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/package.json

@@ -30,6 +30,9 @@
     "@fastify/jwt": "^10.0.0",
     "@fastify/multipart": "^9.2.1",
     "@prisma/client": "^6.17.0",
+    "bcryptjs": "^2.4.3",
+    "handlebars": "^4.7.8",
+    "jsonwebtoken": "^9.0.2",
     "@types/form-data": "^2.2.1",
     "@wecom/crypto": "^1.0.1",
     "ajv": "^8.17.1",
@@ -54,7 +57,9 @@
     "zod": "^4.1.12"
   },
   "devDependencies": {
+    "@types/bcryptjs": "^2.4.6",
     "@types/js-yaml": "^4.0.9",
+    "@types/jsonwebtoken": "^9.0.7",
     "@types/node": "^24.7.1",
     "@types/winston": "^2.4.4",
     "@types/xml2js": "^0.4.14",