feat: Day 10-11 - Agent Configuration System completed

Backend:
- Create agents.yaml config file with 12 agents definition
- Create Prompt templates for topic-evaluation agent
- Implement agentService.ts for loading and managing agent configs
- Create agentController.ts with CRUD operations
- Create agent routes (GET /agents, /agents/:id, etc.)
- Register agent routes in main server

Frontend:
- Create agentApi.ts service module
- Update AgentChatPage to dynamically load agent config from API
- Add loading state and error handling
- Display agent details (description, category, model)

Build: Both frontend and backend build successfully

backend/package-lock.json

@@ -17,6 +17,7 @@
         "prisma": "^6.17.0"
       },
       "devDependencies": {
+        "@types/js-yaml": "^4.0.9",
         "@types/node": "^24.7.1",
         "nodemon": "^3.1.10",
         "pino-pretty": "^13.1.1",
@@ -784,6 +785,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/js-yaml": {
+      "version": "4.0.9",
+      "resolved": "https://registry.npmmirror.com/@types/js-yaml/-/js-yaml-4.0.9.tgz",
+      "integrity": "sha512-k4MGaQl5TGo/iipqb2UDG2UwjXziSWkh0uysQelTlJpX1qGlpUZYm8PnO4DxG1qBomtJUdYJ6qR6xdIah10JLg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/node": {
       "version": "24.7.1",
       "resolved": "https://registry.npmmirror.com/@types/node/-/node-24.7.1.tgz",