Fix build compatibility issues

🔧 Build Fixes:
- Downgrade TypeScript from ^5.7.3 to ^4.9.5 for react-scripts compatibility
- Add .npmrc with legacy-peer-deps=true to handle dependency conflicts
- Ensure compatibility with react-scripts@5.0.1 requirements

This resolves the ERESOLVE error:
❌ react-scripts@5.0.1 expects typescript ^3.2.1 || ^4
✅ Now using typescript ^4.9.5 (compatible)

Build should now succeed on Vercel.

.npmrc

@@ -0,0 +1,2 @@
+legacy-peer-deps=true
+fund=false 

package-lock.json

@@ -35,13 +35,13 @@
         "react-dom": "^18.3.1",
         "react-router-dom": "^6.28.0",
         "react-scripts": "5.0.1",
-        "typescript": "^5.7.3",
         "web-vitals": "^2.1.4"
       },
       "devDependencies": {
         "autoprefixer": "^10.4.21",
         "postcss": "^8.5.6",
-        "tailwindcss": "^3.4.17"
+        "tailwindcss": "^3.4.17",
+        "typescript": "^4.9.5"
       },
       "engines": {
         "node": "22.x"
@@ -20697,16 +20697,16 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.8.3",
+      "version": "4.9.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
-      "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
       },
       "engines": {
-        "node": ">=14.17"
+        "node": ">=4.2.0"
       }
     },
     "node_modules/unbox-primitive": {

package.json

@@ -33,7 +33,6 @@
     "react-dom": "^18.3.1",
     "react-router-dom": "^6.28.0",
     "react-scripts": "5.0.1",
-    "typescript": "^5.7.3",
     "web-vitals": "^2.1.4"
   },
   "scripts": {
@@ -63,6 +62,7 @@
   "devDependencies": {
     "autoprefixer": "^10.4.21",
     "postcss": "^8.5.6",
-    "tailwindcss": "^3.4.17"
+    "tailwindcss": "^3.4.17",
+    "typescript": "^4.9.5"
   }
 }