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/services/track-api-usage.ts

@@ -189,6 +189,7 @@ export async function getGlobalApiStats(): Promise<ApiStats | null> {
  */
 export async function checkIsAdmin(userId: string): Promise<boolean> {
     try {
+        console.log('[checkIsAdmin] Checking admin status for user:', userId);
         const supabase = createServerComponentClient({ cookies });
 
         const { data, error } = await supabase
@@ -197,13 +198,18 @@ export async function checkIsAdmin(userId: string): Promise<boolean> {
             .eq('user_id', userId)
             .single();
 
+        console.log('[checkIsAdmin] Query result - data:', data, 'error:', error);
+
         if (error) {
+            console.log('[checkIsAdmin] Error occurred:', error.message);
             return false;
         }
 
-        return !!data;
+        const isAdmin = !!data;
+        console.log('[checkIsAdmin] Final result:', isAdmin);
+        return isAdmin;
     } catch (err) {
-        console.error('Error checking admin status:', err);
+        console.error('[checkIsAdmin] Exception:', err);
         return false;
     }
 }