fix(config): redirect www subdomain to apex domain

- Add redirect rule in vercel.json to redirect www.tpmjs.com → tpmjs.com
- Use permanent (301) redirect for SEO benefits
- Preserves all paths and query parameters with /:path* pattern
- Ensures canonical URL is always non-www

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

vercel.json

@@ -9,6 +9,19 @@
     "silent": false,
     "autoJobCancelation": true
   },
+  "redirects": [
+    {
+      "source": "/:path*",
+      "has": [
+        {
+          "type": "host",
+          "value": "www.tpmjs.com"
+        }
+      ],
+      "destination": "https://tpmjs.com/:path*",
+      "permanent": true
+    }
+  ],
   "crons": [
     {
       "path": "/api/sync/changes",