Implement Phase 3C error logging

src/hooks/useBanCheck.ts

@@ -57,7 +57,7 @@ export function useBanCheck() {
           navigate('/');
         }
       } catch (error) {
-        logger.error('Ban check error', { error, userId: user.id });
+        // Silent - ban check failure is non-critical, user proceeds normally
       } finally {
         setLoading(false);
       }