feat(schedule): add course table screens and navigation

Add complete schedule functionality including:
- Schedule screen with weekly course table view
- Course detail screen with transparent modal presentation
- New ScheduleStack navigator integrated into main tab bar
- Schedule service for API interactions
- Type definitions for course entities

Also includes bug fixes for group invite/request handlers
to include required groupId parameter.

internal/cache/repository_adapter.go

@@ -0,0 +1,76 @@
+package cache
+
+import (
+	"carrot_bbs/internal/model"
+	"carrot_bbs/internal/repository"
+)
+
+// ConversationRepositoryAdapter 适配 MessageRepository 到 ConversationRepository 接口
+type ConversationRepositoryAdapter struct {
+	repo *repository.MessageRepository
+}
+
+// NewConversationRepositoryAdapter 创建适配器
+func NewConversationRepositoryAdapter(repo *repository.MessageRepository) ConversationRepository {
+	return &ConversationRepositoryAdapter{repo: repo}
+}
+
+// GetConversationByID 实现 ConversationRepository 接口
+func (a *ConversationRepositoryAdapter) GetConversationByID(convID string) (*model.Conversation, error) {
+	return a.repo.GetConversation(convID)
+}
+
+// GetConversationsByUserID 实现 ConversationRepository 接口
+func (a *ConversationRepositoryAdapter) GetConversationsByUserID(userID string, page, pageSize int) ([]*model.Conversation, int64, error) {
+	return a.repo.GetConversations(userID, page, pageSize)
+}
+
+// GetParticipant 实现 ConversationRepository 接口
+func (a *ConversationRepositoryAdapter) GetParticipant(convID, userID string) (*model.ConversationParticipant, error) {
+	return a.repo.GetParticipant(convID, userID)
+}
+
+// GetParticipants 实现 ConversationRepository 接口
+func (a *ConversationRepositoryAdapter) GetParticipants(convID string) ([]*model.ConversationParticipant, error) {
+	return a.repo.GetConversationParticipants(convID)
+}
+
+// GetUnreadCount 实现 ConversationRepository 接口
+func (a *ConversationRepositoryAdapter) GetUnreadCount(userID, convID string) (int64, error) {
+	return a.repo.GetUnreadCount(convID, userID)
+}
+
+// MessageRepositoryAdapter 适配 MessageRepository 到 MessageRepository 接口
+type MessageRepositoryAdapter struct {
+	repo *repository.MessageRepository
+}
+
+// NewMessageRepositoryAdapter 创建适配器
+func NewMessageRepositoryAdapter(repo *repository.MessageRepository) MessageRepository {
+	return &MessageRepositoryAdapter{repo: repo}
+}
+
+// GetMessages 实现 MessageRepository 接口
+func (a *MessageRepositoryAdapter) GetMessages(convID string, page, pageSize int) ([]*model.Message, int64, error) {
+	return a.repo.GetMessages(convID, page, pageSize)
+}
+
+// GetMessagesAfterSeq 实现 MessageRepository 接口
+func (a *MessageRepositoryAdapter) GetMessagesAfterSeq(convID string, afterSeq int64, limit int) ([]*model.Message, error) {
+	return a.repo.GetMessagesAfterSeq(convID, afterSeq, limit)
+}
+
+// GetMessagesBeforeSeq 实现 MessageRepository 接口
+func (a *MessageRepositoryAdapter) GetMessagesBeforeSeq(convID string, beforeSeq int64, limit int) ([]*model.Message, error) {
+	return a.repo.GetMessagesBeforeSeq(convID, beforeSeq, limit)
+}
+
+// CreateMessage 实现 MessageRepository 接口
+func (a *MessageRepositoryAdapter) CreateMessage(msg *model.Message) error {
+	return a.repo.CreateMessage(msg)
+}
+
+// UpdateConversationLastSeq 实现 MessageRepository 接口
+func (a *MessageRepositoryAdapter) UpdateConversationLastSeq(convID string, seq int64) error {
+	return a.repo.UpdateConversationLastSeq(convID, seq)
+}