fix(redirects): exclude API routes from www redirect

The redirect was being applied to ALL routes including API routes,
causing them to return "Redirecting..." instead of executing.

Use negative lookahead regex `/((?!api).*)` to exclude /api/* paths
from the www → non-www redirect.

This ensures:
- API routes execute normally without redirection
- Page routes still redirect from www.tpmjs.com to tpmjs.com
- Follows Option 2 from the investigation plan

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

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

apps/web/next.config.ts

@@ -6,14 +6,14 @@ const nextConfig: NextConfig = {
   async redirects() {
     return [
       {
-        source: '/:path*',
+        source: '/((?!api).*)',
         has: [
           {
             type: 'host',
             value: 'www.tpmjs.com',
           },
         ],
-        destination: 'https://tpmjs.com/:path*',
+        destination: 'https://tpmjs.com/$1',
         permanent: true,
       },
     ];