Atualização geral de optimazação e desing

lib/quiz/quiz_result.dart

@@ -1,8 +1,7 @@
 import 'package:flutter/material.dart';
-import 'package:firebase_auth/firebase_auth.dart';
-import 'package:cloud_firestore/cloud_firestore.dart';
 import 'dart:async';
 
+import '../main.dart' show supabase;
 import 'quiz_prefs.dart';
 
 class QuizResultScreen extends StatefulWidget {
@@ -40,7 +39,7 @@ class _QuizResultScreenState extends State<QuizResultScreen> {
         maxScore: widget.maxScore,
       );
     } else {
-      final uid = FirebaseAuth.instance.currentUser?.uid;
+      final uid = supabase.auth.currentUser?.id;
       if (uid != null && uid.trim().isNotEmpty) {
         await QuizPrefs.saveLastResultForUser(
           userId: uid,
@@ -55,25 +54,23 @@ class _QuizResultScreenState extends State<QuizResultScreen> {
       }
     }
 
-    final uid = FirebaseAuth.instance.currentUser?.uid;
+    final uid = supabase.auth.currentUser?.id;
     final userId = (uid ?? '').trim();
     if (userId.isNotEmpty &&
         scope.isNotEmpty &&
         scope.startsWith('${userId}_')) {
       final childId = scope.substring(userId.length + 1).trim();
       if (childId.isNotEmpty) {
-        // Fire-and-forget: avoid blocking UI on Firestore (may hang offline).
+        // Fire-and-forget: avoid blocking UI on erros de rede.
         unawaited(
-          FirebaseFirestore.instance
-              .collection('users')
-              .doc(userId)
-              .collection('children')
-              .doc(childId)
-              .set({
-                'lastScore': widget.finalScore,
-                'lastMaxScore': widget.maxScore,
-                'lastQuizAt': FieldValue.serverTimestamp(),
-              }, SetOptions(merge: true))
+          supabase
+              .from('children')
+              .update({
+                'last_score': widget.finalScore,
+                'last_max_score': widget.maxScore,
+                'last_quiz_at': DateTime.now().toIso8601String(),
+              })
+              .eq('id', childId)
               .catchError((_) {}),
         );
       }