fix: Downgrade Vite to v5.4.5 and improve Vercel build configuration

- Downgrade vite from 6.3.5 to 5.4.5 for better stability
- Update rollup resolution to 4.20.0 for compatibility
- Improve vercel.json with fallback build strategy
- Add clean install command to avoid npm cache issues

Author: techagbadev-create

client/package.json

@@ -89,6 +89,15 @@
     "tw-animate-css": "^1.3.7",
     "typescript": "~5.8.3",
     "typescript-eslint": "^8.30.1",
-    "vite": "^6.3.5"
+    "vite": "^5.4.5"
+  },
+  "resolutions": {
+    "rollup": "^4.20.0",
+    "@rollup/rollup-linux-x64-gnu": "^4.20.0",
+    "vite": "^5.4.5"
+  },
+  "overrides": {
+    "rollup": "^4.20.0",
+    "vite": "^5.4.5"
   }
 }

client/vercel.json

@@ -1,4 +1,8 @@
 {
+  "version": 2,
+  "installCommand": "rm -rf node_modules package-lock.json && npm install --no-optional",
+  "buildCommand": "npm run build || (npm install --include=optional && npm run build)",
+  "outputDirectory": "dist",
   "rewrites": [
     {
       "source": "/(.*)",