feat: add Koa2 BFF server, CLI management, sessions CLI integration, and logs page

- Add Koa2 BFF layer for API proxy, file upload, session management
- Auto-check and enable api_server in ~/.hermes/config.yaml on startup
- Integrate sessions with Hermes CLI (list, get, delete)
- Add Logs page with level filtering, log file selection, and search
- Add CLI commands: start/stop/restart/status for daemon management
- Unify package.json for frontend and server dependencies
- Default port changed to 8648

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,6 @@
 {
   "name": "hermes-web-ui",
-  "version": "0.1.2",
-  "type": "module",
+  "version": "0.1.3",
   "description": "Hermes Agent Web UI - Chat and Job Management Dashboard",
   "repository": {
     "type": "git",
@@ -14,8 +13,10 @@
   },
   "scripts": {
     "start": "vite --host --port 8648",
-    "dev": "vite --host",
-    "build": "vue-tsc -b && vite build",
+    "dev": "concurrently \"npm run dev:server\" \"npm run dev:client\"",
+    "dev:client": "vite --host",
+    "dev:server": "nodemon --watch server/src --ext ts --exec node -r ts-node/register server/src/index.ts",
+    "build": "vue-tsc -b && vite build && tsc -p server/tsconfig.json",
     "preview": "vite preview"
   },
   "files": [
@@ -23,7 +24,13 @@
     "dist/"
   ],
   "dependencies": {
+    "@koa/bodyparser": "^5.0.0",
+    "@koa/cors": "^5.0.0",
+    "@koa/router": "^13.1.0",
     "highlight.js": "^11.11.1",
+    "koa": "^2.15.3",
+    "koa-send": "^5.0.1",
+    "koa-static": "^5.0.0",
     "markdown-it": "^14.1.1",
     "naive-ui": "^2.44.1",
     "pinia": "^3.0.4",
@@ -31,11 +38,19 @@
     "vue-router": "^4.6.4"
   },
   "devDependencies": {
+    "@types/koa": "^2.15.0",
+    "@types/koa__cors": "^5.0.0",
+    "@types/koa__router": "^12.0.4",
+    "@types/koa-send": "^4.1.6",
+    "@types/koa-static": "^4.0.4",
     "@types/markdown-it": "^14.1.2",
     "@types/node": "^24.12.2",
     "@vitejs/plugin-vue": "^6.0.5",
     "@vue/tsconfig": "^0.9.1",
+    "concurrently": "^9.2.1",
+    "nodemon": "^3.1.14",
     "sass": "^1.99.0",
+    "ts-node": "^10.9.2",
     "typescript": "~6.0.2",
     "vite": "^8.0.4",
     "vue-tsc": "^3.2.6"