fix: resolve infinite recursion in admin_users RLS policy

The admin_users policy was checking if user is admin by querying
the same table, causing infinite recursion. Changed to allow users
to view their own admin record directly using auth.uid() = user_id.

This fixes the error: 'infinite recursion detected in policy for
relation admin_users'

src/app/api/debug-admin/route.ts

@@ -0,0 +1,48 @@
+import { createServerComponentClient } from '@supabase/auth-helpers-nextjs';
+import { cookies } from 'next/headers';
+import { NextResponse } from 'next/server';
+
+export async function GET() {
+    const supabase = createServerComponentClient({ cookies });
+
+    // Get current user
+    const { data: { user }, error: userError } = await supabase.auth.getUser();
+
+    if (userError || !user) {
+        return NextResponse.json({
+            success: false,
+            error: 'Not authenticated',
+            userError: userError?.message
+        });
+    }
+
+    // Check admin_users table
+    const { data: adminData, error: adminError } = await supabase
+        .from('admin_users')
+        .select('*')
+        .eq('user_id', user.id)
+        .single();
+
+    // Get all admin users (for debugging)
+    const { data: allAdmins, error: allAdminsError } = await supabase
+        .from('admin_users')
+        .select('*');
+
+    return NextResponse.json({
+        success: true,
+        currentUser: {
+            id: user.id,
+            email: user.email
+        },
+        adminCheck: {
+            data: adminData,
+            error: adminError?.message,
+            isAdmin: !!adminData
+        },
+        allAdmins: {
+            data: allAdmins,
+            error: allAdminsError?.message,
+            count: allAdmins?.length || 0
+        }
+    });
+}