fix: Remove broken callback.js + simplify Google OAuth flow

DELETED:
- /api/auth/callback.js (was causing createClient error)

FIXED:
- /api/auth/google.js now redirects to /callback.html
- Supabase Auth handles OAuth and redirects to static page
- No server-side callback needed!

NOW IT WILL WORK!

Author: namandhakad712

cloud-bridge/api/auth/callback.js

@@ -1,17 +1,19 @@
 /**
- * Google OAuth using Supabase Auth
- * Redirects to Supabase Auth which handles Google OAuth
+ * Google OAuth - Redirect to Supabase Auth
  */
 
 export default async function handler(req, res) {
     const supabaseUrl = process.env.SUPABASE_URL;
 
     if (!supabaseUrl) {
-        return res.status(500).json({ error: 'Supabase not configured' });
+        return res.status(500).json({ error: 'Supabase URL not configured' });
     }
 
+    // Build redirect URL back to our static callback page
+    const redirectTo = `https://${req.headers.host}/callback.html`;
+
     // Redirect to Supabase Auth with Google provider
-    const redirectUrl = `${supabaseUrl}/auth/v1/authorize?provider=google&redirect_to=${encodeURIComponent(`https://${req.headers.host}/api/auth/callback`)}`;
+    const authUrl = `${supabaseUrl}/auth/v1/authorize?provider=google&redirect_to=${encodeURIComponent(redirectTo)}`;
 
-    res.redirect(302, redirectUrl);
+    res.redirect(302, authUrl);
 }