Add Vercel rewrites for API proxy and SPA fallback

The Vite dev proxy (/api, /node-info → node.gitlawb.com) only exists in
the dev server, so the deployed static build 404'd every API call.
vercel.json now mirrors the proxy in production and adds an SPA fallback
so client-side routes survive refresh/deep links. Also ignores the
.vercel project-link directory.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: kevincodex1

.gitignore

@@ -22,3 +22,4 @@ dist-ssr
 *.njsproj
 *.sln
 *.sw?
+.vercel

vercel.json

@@ -0,0 +1,7 @@
+{
+  "rewrites": [
+    { "source": "/api/:path*", "destination": "https://node.gitlawb.com/api/:path*" },
+    { "source": "/node-info", "destination": "https://node.gitlawb.com/" },
+    { "source": "/(.*)", "destination": "/index.html" }
+  ]
+}