perf: optimize build — chunk splitting, remove VueDevTools from prod, fix firebase-tools to devDeps

- vite.config.ts: Remove VueDevTools from production build (dev only)
- vite.config.ts: Add manualChunks for firebase, charts, pdf, vue, maps vendors
- vite.config.ts: Increase chunkSizeWarningLimit to 700KB for Google Maps
- package.json: Move firebase-tools from dependencies to devDependencies
- router/index.ts: Add webpackChunkName groups (transport, discover, user, admin, roles)
- Clean up build log files (build_debug.txt, build_error*.txt, etc.)

Build time improvement: chunks now load on demand per user role

frontend/package.json

@@ -18,7 +18,6 @@
     "axios": "^1.13.2",
     "chart.js": "^4.5.1",
     "firebase": "^12.9.0",
-    "firebase-tools": "^15.7.0",
     "html2canvas": "^1.4.1",
     "jspdf": "^4.1.0",
     "pinia": "^3.0.4",
@@ -33,6 +32,7 @@
     "@vitejs/plugin-vue": "^6.0.1",
     "@vue/tsconfig": "^0.8.1",
     "autoprefixer": "^10.4.24",
+    "firebase-tools": "^15.7.0",
     "postcss": "^8.5.6",
     "tailwindcss": "^4.2.0",
     "typescript": "~5.9.3",