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.

configs/config.yaml

@@ -170,3 +170,23 @@ email:
   use_tls: true
   insecure_skip_verify: false
   timeout: 15
+
+# 会话缓存配置
+conversation_cache:
+  # TTL 配置
+  detail_ttl: 5m           # 会话详情缓存时间
+  list_ttl: 60s            # 会话列表缓存时间
+  participant_ttl: 5m      # 参与者缓存时间
+  unread_ttl: 30s          # 未读数缓存时间
+  
+  # 消息缓存配置
+  message_detail_ttl: 30m  # 单条消息详情缓存
+  message_list_ttl: 5m     # 消息分页列表缓存
+  message_index_ttl: 30m   # 消息索引缓存
+  message_count_ttl: 30m   # 消息计数缓存
+  
+  # 批量写入配置
+  batch_interval: 5s       # 写入间隔
+  batch_threshold: 100     # 条数阈值
+  batch_max_size: 500      # 单次最大批量
+  buffer_max_size: 10000   # 写缓冲最大条数