fix: lazy-load Prisma client to fix build-time URL parsing

- Make Prisma client initialization lazy via Proxy
- Defer database-pool import until runtime
- Add guard for empty DATABASE_URL
- Build now succeeds with Next.js 16.1.4

package.json

@@ -75,7 +75,7 @@
     "leaflet": "^1.9.4",
     "lucide-react": "^0.525.0",
     "motion": "^12.27.1",
-    "next": "^15.5.9",
+    "next": "^16.1.4",
     "next-auth": "^4.24.13",
     "next-themes": "^0.4.6",
     "node-cron": "^4.2.1",
@@ -103,15 +103,15 @@
     "@types/node": "^24.10.9",
     "@types/node-cron": "^3.0.11",
     "@types/pg": "^8.16.0",
-    "@types/react": "^19.2.8",
-    "@types/react-dom": "^19.2.3",
+    "@types/react": "19.2.8",
+    "@types/react-dom": "19.2.3",
     "@typescript-eslint/eslint-plugin": "^8.53.1",
     "@typescript-eslint/parser": "^8.53.1",
     "@vitejs/plugin-react": "^4.7.0",
     "@vitest/coverage-v8": "^3.2.4",
     "concurrently": "^9.2.1",
     "eslint": "^8.57.0",
-    "eslint-config-next": "^15.5.9",
+    "eslint-config-next": "^16.1.4",
     "eslint-plugin-prettier": "^5.5.5",
     "eslint-plugin-react-hooks": "^5.2.0",
     "jest-axe": "^10.0.0",
@@ -187,5 +187,9 @@
     "*.{md,markdown}": [
       "markdownlint-cli2 --fix"
     ]
+  },
+  "overrides": {
+    "@types/react": "19.2.8",
+    "@types/react-dom": "19.2.3"
   }
 }