Melhorias no comportamento do chat com IA;

Adição do histórico de conversas com IA.

lib/core/routing/app_router.dart

@@ -142,14 +142,7 @@ class AppRouter {
         ],
       ),
 
-      // AI Tutor Route (independent)
-      GoRoute(
-        path: tutor,
-        name: 'aiTutor',
-        builder: (context, state) => const TutorChatPageSimple(),
-      ),
-
-      // AI Tutor Route with conversation ID (resume conversation)
+      // AI Tutor Route with conversation ID (resume conversation) - MUST come before regular /ai-tutor route
       GoRoute(
         path: '$tutor/:conversationId',
         name: 'aiTutorConversation',
@@ -159,6 +152,13 @@ class AppRouter {
         },
       ),
 
+      // AI Tutor Route (independent - new conversation)
+      GoRoute(
+        path: tutor,
+        name: 'aiTutor',
+        builder: (context, state) => const TutorChatPageSimple(),
+      ),
+
       // Chat History Route
       GoRoute(
         path: chatHistory,