refactor: 统一项目名称从OpenFang到ZCLAW

重构所有代码和文档中的项目名称，将OpenFang统一更新为ZCLAW。包括：
- 配置文件中的项目名称
- 代码注释和文档引用
- 环境变量和路径
- 类型定义和接口名称
- 测试用例和模拟数据

同时优化部分代码结构，移除未使用的模块，并更新相关依赖项。

desktop/src-tauri/src/intelligence/heartbeat.rs

@@ -9,8 +9,6 @@
 //!
 //! NOTE: Some methods are reserved for future proactive features.
 
-#![allow(dead_code)] // Methods reserved for future proactive features
-
 use chrono::{Local, Timelike};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
@@ -94,6 +92,7 @@ pub enum HeartbeatStatus {
 }
 
 /// Type alias for heartbeat check function
+#[allow(dead_code)] // Reserved for future proactive check registration
 pub type HeartbeatCheckFn = Box<dyn Fn(String) -> std::pin::Pin<Box<dyn std::future::Future<Output = Option<HeartbeatAlert>> + Send>> + Send + Sync>;
 
 // === Default Config ===
@@ -187,6 +186,7 @@ impl HeartbeatEngine {
     }
 
     /// Check if the engine is running
+    #[allow(dead_code)] // Reserved for UI status display
     pub async fn is_running(&self) -> bool {
         *self.running.lock().await
     }
@@ -197,6 +197,7 @@ impl HeartbeatEngine {
     }
 
     /// Subscribe to alerts
+    #[allow(dead_code)] // Reserved for future UI notification integration
     pub fn subscribe(&self) -> broadcast::Receiver<HeartbeatAlert> {
         self.alert_sender.subscribe()
     }
@@ -355,7 +356,9 @@ static LAST_INTERACTION: OnceLock<RwLock<StdHashMap<String, String>>> = OnceLock
 pub struct MemoryStatsCache {
     pub task_count: usize,
     pub total_entries: usize,
+    #[allow(dead_code)] // Reserved for UI display
     pub storage_size_bytes: usize,
+    #[allow(dead_code)] // Reserved for UI display
     pub last_updated: Option<String>,
 }