fix(frontend): eliminate all tsconfig and vite proxy build deprecation warnings

src/frontend/tsconfig.app.json

@@ -24,11 +24,10 @@
     "noImplicitReturns": true,
 
     /* Path Aliases */
-    "baseUrl": ".",
     "paths": {
-      "@/*": ["src/*"],
-      "@shared/*": ["src/shared/*"],
-      "@modules/*": ["src/modules/*"]
+      "@/*": ["./src/*"],
+      "@shared/*": ["./src/shared/*"],
+      "@modules/*": ["./src/modules/*"]
     }
   },
   "include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.vue"]

src/frontend/vite.config.ts

@@ -26,8 +26,9 @@ export default defineConfig({
         changeOrigin: true,
         secure: false,
         configure: (proxy) => {
-          proxy.on('error', (_err, _req, res: any) => {
-            if (res && !res.headersSent) {
+          proxy.on('error', (...args: any[]) => {
+            const res = args[2];
+            if (res && typeof res.writeHead === 'function' && !res.headersSent) {
               res.writeHead(200, { 'Content-Type': 'application/json' });
               res.end(JSON.stringify({ status: 'OFFLINE_MOCK_ACTIVE', data: [], versions: [] }));
             }