feat: 完善多轮对话功能实现

- 修复编译错误和类型问题
- 添加完整的单元测试套件
- 创建多轮对话测试组件和页面
- 添加详细的功能文档和使用说明
- 优化错误处理和类型安全
- 遵循promptx开发规范的完整实现

功能特性:
 多轮对话支持 - 历史消息传递和上下文保持
 会话管理 - session_id管理和生命周期控制
 数据持久化 - 完整的会话历史存储
 类型安全 - 完整的TypeScript类型定义
 测试覆盖 - 单元测试和集成测试
 文档完善 - 详细的实现文档和使用指南

apps/desktop/src-tauri/src/business/services/conversation_service.rs

@@ -272,3 +272,8 @@ impl ConversationService {
         Ok("新对话".to_string())
     }
 }
+
+// 导入测试文件
+#[cfg(test)]
+#[path = "conversation_service_test.rs"]
+mod conversation_service_test;

apps/desktop/src-tauri/src/business/services/conversation_service_test.rs

@@ -0,0 +1,224 @@
+#[cfg(test)]
+mod conversation_service_tests {
+    use super::*;
+    use crate::data::repositories::conversation_repository::ConversationRepository;
+    use crate::data::models::conversation::{
+        CreateConversationSessionRequest, AddMessageRequest, ConversationHistoryQuery,
+        MessageRole, MessageContent,
+    };
+    use crate::infrastructure::database::Database;
+    use std::sync::{Arc, Mutex};
+
+    /// 创建测试用的会话服务
+    fn create_test_conversation_service() -> ConversationService {
+        let database = Arc::new(Database::new().expect("Failed to create test database"));
+        let connection = database.get_connection();
+        let repository = Arc::new(ConversationRepository::new(connection));
+        
+        // 初始化数据库表
+        repository.initialize_tables().expect("Failed to initialize tables");
+        
+        ConversationService::new(repository)
+    }
+
+    #[tokio::test]
+    async fn test_create_session() {
+        let service = create_test_conversation_service();
+        
+        let request = CreateConversationSessionRequest {
+            title: Some("测试会话".to_string()),
+            metadata: None,
+        };
+
+        let result = service.create_session(request).await;
+        assert!(result.is_ok());
+        
+        let session = result.unwrap();
+        assert_eq!(session.title, Some("测试会话".to_string()));
+        assert!(session.is_active);
+    }
+
+    #[tokio::test]
+    async fn test_add_message() {
+        let service = create_test_conversation_service();
+        
+        // 创建会话
+        let session_request = CreateConversationSessionRequest {
+            title: Some("测试会话".to_string()),
+            metadata: None,
+        };
+        let session = service.create_session(session_request).await.unwrap();
+
+        // 添加消息
+        let message_request = AddMessageRequest {
+            session_id: session.id.clone(),
+            role: MessageRole::User,
+            content: vec![MessageContent::Text { text: "你好".to_string() }],
+            metadata: None,
+        };
+
+        let result = service.add_message(message_request).await;
+        assert!(result.is_ok());
+        
+        let message = result.unwrap();
+        assert_eq!(message.session_id, session.id);
+        assert_eq!(message.role, MessageRole::User);
+    }
+
+    #[tokio::test]
+    async fn test_get_conversation_history() {
+        let service = create_test_conversation_service();
+        
+        // 创建会话
+        let session_request = CreateConversationSessionRequest {
+            title: Some("测试会话".to_string()),
+            metadata: None,
+        };
+        let session = service.create_session(session_request).await.unwrap();
+
+        // 添加多条消息
+        let messages = vec![
+            ("你好", MessageRole::User),
+            ("你好！有什么可以帮助你的吗？", MessageRole::Assistant),
+            ("今天天气怎么样？", MessageRole::User),
+            ("抱歉，我无法获取实时天气信息。", MessageRole::Assistant),
+        ];
+
+        for (content, role) in messages {
+            let message_request = AddMessageRequest {
+                session_id: session.id.clone(),
+                role,
+                content: vec![MessageContent::Text { text: content.to_string() }],
+                metadata: None,
+            };
+            service.add_message(message_request).await.unwrap();
+        }
+
+        // 获取会话历史
+        let history_query = ConversationHistoryQuery {
+            session_id: session.id.clone(),
+            limit: None,
+            offset: None,
+            include_system_messages: Some(false),
+        };
+
+        let result = service.get_conversation_history(history_query).await;
+        assert!(result.is_ok());
+        
+        let history = result.unwrap();
+        assert_eq!(history.session.id, session.id);
+        assert_eq!(history.messages.len(), 4);
+        assert_eq!(history.total_count, 4);
+    }
+
+    #[tokio::test]
+    async fn test_generate_session_summary() {
+        let service = create_test_conversation_service();
+        
+        // 创建会话
+        let session_request = CreateConversationSessionRequest {
+            title: None,
+            metadata: None,
+        };
+        let session = service.create_session(session_request).await.unwrap();
+
+        // 添加用户消息
+        let message_request = AddMessageRequest {
+            session_id: session.id.clone(),
+            role: MessageRole::User,
+            content: vec![MessageContent::Text { text: "请帮我分析一下多轮对话的实现原理".to_string() }],
+            metadata: None,
+        };
+        service.add_message(message_request).await.unwrap();
+
+        // 生成会话摘要
+        let result = service.generate_session_summary(&session.id).await;
+        assert!(result.is_ok());
+        
+        let summary = result.unwrap();
+        assert!(!summary.is_empty());
+        assert!(summary.contains("多轮对话") || summary.len() <= 50);
+    }
+
+    #[tokio::test]
+    async fn test_get_conversation_stats() {
+        let service = create_test_conversation_service();
+        
+        // 创建多个会话
+        for i in 0..3 {
+            let session_request = CreateConversationSessionRequest {
+                title: Some(format!("测试会话 {}", i + 1)),
+                metadata: None,
+            };
+            let session = service.create_session(session_request).await.unwrap();
+
+            // 为每个会话添加消息
+            for j in 0..2 {
+                let message_request = AddMessageRequest {
+                    session_id: session.id.clone(),
+                    role: if j % 2 == 0 { MessageRole::User } else { MessageRole::Assistant },
+                    content: vec![MessageContent::Text { text: format!("消息 {}", j + 1) }],
+                    metadata: None,
+                };
+                service.add_message(message_request).await.unwrap();
+            }
+        }
+
+        // 获取统计信息
+        let result = service.get_conversation_stats().await;
+        assert!(result.is_ok());
+        
+        let stats = result.unwrap();
+        assert_eq!(stats.total_sessions, 3);
+        assert_eq!(stats.active_sessions, 3);
+        assert_eq!(stats.total_messages, 6);
+        assert_eq!(stats.average_messages_per_session, 2.0);
+    }
+
+    #[tokio::test]
+    async fn test_delete_session() {
+        let service = create_test_conversation_service();
+        
+        // 创建会话
+        let session_request = CreateConversationSessionRequest {
+            title: Some("待删除会话".to_string()),
+            metadata: None,
+        };
+        let session = service.create_session(session_request).await.unwrap();
+
+        // 验证会话存在
+        let get_result = service.get_session(&session.id).await;
+        assert!(get_result.is_ok());
+        assert!(get_result.unwrap().is_some());
+
+        // 删除会话
+        let delete_result = service.delete_session(&session.id).await;
+        assert!(delete_result.is_ok());
+
+        // 验证会话已被软删除（标记为非活跃）
+        let get_result_after = service.get_session(&session.id).await;
+        assert!(get_result_after.is_ok());
+        if let Some(session_after) = get_result_after.unwrap() {
+            assert!(!session_after.is_active);
+        }
+    }
+
+    #[tokio::test]
+    async fn test_cleanup_expired_sessions() {
+        let service = create_test_conversation_service();
+        
+        // 创建会话
+        let session_request = CreateConversationSessionRequest {
+            title: Some("测试会话".to_string()),
+            metadata: None,
+        };
+        let _session = service.create_session(session_request).await.unwrap();
+
+        // 清理过期会话（设置为0天，应该清理所有会话）
+        let result = service.cleanup_expired_sessions(0).await;
+        assert!(result.is_ok());
+        
+        let cleaned_count = result.unwrap();
+        assert_eq!(cleaned_count, 1);
+    }
+}

apps/desktop/src-tauri/src/data/repositories/conversation_repository.rs

@@ -100,7 +100,7 @@ impl ConversationRepository {
         let session = stmt.query_row(params![session_id], |row| {
             match self.row_to_session(row) {
                 Ok(session) => Ok(session),
-                Err(e) => Err(rusqlite::Error::InvalidColumnType(0, "conversion error".to_string(), rusqlite::types::Type::Text)),
+                Err(_e) => Err(rusqlite::Error::InvalidColumnType(0, "conversion error".to_string(), rusqlite::types::Type::Text)),
             }
         }).optional()?;