gerenciamento e criação de turmas junto de correções na tela de professores

docs/CHANGELOG.md

@@ -6,6 +6,47 @@
 
 ## [Unreleased]
 
+### Added
+- **Class Creation Feature (ETAPA 1)** - Teachers can now create classes from the dashboard
+  - New "Criar Turma" button in Teacher Dashboard Quick Actions
+  - Simple dialog interface for entering class name
+  - Automatic generation of 6-character unique class codes (A-Z, 0-9)
+  - Firestore integration saving class data (name, teacherId, code, timestamp)
+  - Visual feedback with loading indicator and success/error messages
+
+- **Classes List Display (ETAPA 2)** - Teachers can now view their created classes
+  - New "As Minhas Turmas" section in Teacher Dashboard
+  - Real-time StreamBuilder to fetch classes from Firestore
+  - **CORREÇÃO**: O erro anterior foi tentar usar `GridView` horizontal para um layout que exige colunas fixas
+  - **SOLUÇÃO**: Usar `ListView.builder` com `scrollDirection: Axis.horizontal`
+  - Cada item do ListView é uma `Column` contendo 2 cards (índice * 2 e índice * 2 + 1)
+  - Cards mantêm exatamente o mesmo tamanho e estilo da lista vertical original
+  - Layout: Card 1, 3, 5... (top row) | Card 2, 4, 6... (bottom row)
+  - Scroll horizontal para visualizar todas as turmas
+  - Visual cards showing class name and access code
+  - Empty state message when no classes exist
+  - Loading state with CircularProgressIndicator
+
+### Fixed
+- **Unified Quick Action Cards Text Style**
+  - "Upload Conteúdo" and "Criar Quiz" cards now match "Criar Turma" text alignment
+  - All cards use `Column` with `crossAxisAlignment: CrossAxisAlignment.start` for text section
+  - Subtitle text supports 2 lines with `maxLines: 2` and `height: 1.2`
+  - Consistent typography: title fontSize 16, subtitle fontSize 12
+  - "Criar Quiz" subtitle changed to "Avaliações interativas"
+
+- **Pixel Overflow in Classes List Widget**
+  - **Causa**: Tentativa de usar `GridView` horizontal para layout de colunas fixas
+  - **Solução**: Substituir por `ListView.builder` com `scrollDirection: Axis.horizontal`
+  - Cada item do ListView é uma `Column` com 2 cards (índice * 2 e índice * 2 + 1)
+  - Cards mantêm tamanho original da lista vertical (sem constraints artificiais)
+  - Altura do SizedBox: 280 pixels (suficiente para 2 cards + spacing)
+
+- **Pixel Overflow in Teacher Dashboard Cards**
+  - Replaced fixed height constraints with flexible `BoxConstraints(minHeight: 135, maxHeight: 160)`
+  - Fixed overflow issues in "Upload Conteúdo" and "Criar Turma" cards
+  - Cards now properly adapt to different screen sizes and content
+
 ### Planned Features
 - Voice interaction capabilities
 - Advanced analytics dashboard