fix: 添加Serde序列化支持以修复Tauri IPC错误

- 为 comfyui_sdk::ValidationResult 和 ValidationError 添加序列化支持
- 为 ConfigStats 和 Environment 类型添加序列化支持
- 为 ExecutionStats、MonitorStats、CacheStats 添加序列化支持
- 修复 Tauri 命令返回类型不满足 IpcResponse trait 的问题

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

@@ -10,7 +10,7 @@ use crate::config::{AppConfig, ComfyUISettings};
 use crate::data::models::comfyui::{ComfyUIConfig, ValidationResult};
 
 /// 环境类型
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, serde::Serialize, serde::Deserialize)]
 pub enum Environment {
     /// 开发环境
     Development,
@@ -285,7 +285,7 @@ impl ConfigManager {
 }
 
 /// 配置统计信息
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub struct ConfigStats {
     pub environment: Environment,
     pub config_path: Option<String>,

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

@@ -368,7 +368,7 @@ impl ExecutionEngine {
 }
 
 /// 执行统计信息
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub struct ExecutionStats {
     pub running_count: usize,
     pub running_executions: Vec<String>,

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

@@ -444,7 +444,7 @@ impl RealtimeMonitor {
 }
 
 /// 监控统计信息
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub struct MonitorStats {
     pub is_running: bool,
     pub websocket_connected: bool,

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

@@ -294,7 +294,7 @@ impl TemplateEngine {
 }
 
 /// 缓存统计信息
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
 pub struct CacheStats {
     pub cached_templates: usize,
     pub cache_keys: Vec<String>,