fix: resolve intermittent startup deadlock issues

- Optimize configuration access locks to prevent race conditions
- Enhance UI monitoring thread with non-blocking lock operations
- Improve window creation timing and synchronization
- Add comprehensive deadlock detection and debugging logs
- Simplify code structure with better error handling patterns
- Update changelog with user-friendly descriptions

src-tauri/src/cmd/profile.rs

@@ -216,7 +216,7 @@ pub async fn import_profile(url: String, option: Option<PrfOption>) -> CmdResult
         }
         Ok(Err(e)) => {
             logging!(error, Type::Cmd, true, "[导入订阅] 导入失败: {}", e);
-            Err(format!("导入订阅失败: {}", e).into())
+            Err(format!("导入订阅失败: {e}"))
         }
         Err(_) => {
             logging!(error, Type::Cmd, true, "[导入订阅] 导入超时(60秒): {}", url);