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/create_mock_user_platform.sql

@@ -0,0 +1,51 @@
+-- 在 platform_schema.users 中创建 mock 用户
+-- 用于 PKB 等模块的测试
+
+-- 首先需要一个默认租户
+INSERT INTO platform_schema.tenants (id, code, name, type, status, created_at, updated_at)
+VALUES (
+  'tenant-mock-001',
+  'mock-tenant',
+  '测试租户',
+  'INTERNAL',
+  'ACTIVE',
+  NOW(),
+  NOW()
+)
+ON CONFLICT (id) DO NOTHING;
+
+-- 创建 mock 用户
+INSERT INTO platform_schema.users (
+  id, 
+  phone, 
+  email, 
+  password, 
+  is_default_password,
+  name, 
+  role, 
+  status, 
+  tenant_id,
+  kb_quota, 
+  kb_used, 
+  is_trial, 
+  created_at, 
+  updated_at
+)
+VALUES (
+  'user-mock-001',
+  '13800000000',
+  'mock@test.com',
+  '$2b$10$mockhashedpassword123456789',
+  true,
+  '测试用户',
+  'USER',
+  'active',
+  'tenant-mock-001',
+  3,
+  0,
+  false,
+  NOW(),
+  NOW()
+)
+ON CONFLICT (id) DO NOTHING;
+