fix(clash): take config write lock when changing mode

change_clash_mode committed the clash draft and saved config.yaml without
claiming CONFIG_WRITE_LOCK, so a concurrent patch_clash transaction could
have its staged draft committed here or its file-snapshot rollback swallow
the mode change. Take lock_config_write (waiting) rather than
try_lock_config_write: two of the three callers (hotkey, tray) discard the
result, so fail-fast would silently drop the switch, and the lock is only
attempted after the mihomo patch already applied, where an Err would roll
the frontend back while the core runs the new mode.

Changelog.md

@@ -10,6 +10,8 @@
 - 修复 代理 页展开分组后不显示最新测速结果，需切换节点才刷新
 - 修复 代理 在全局模式下无法展开节点组
 - 修复 自定义 CSS 无法修改编辑器字体和字号的问题
+- 修复恢复备份的同时修改配置，可能导致配置丢失或错乱的问题
+- 修复切换规则模式与配置变更并发时可能丢失或错乱的问题
 
 **🐧 Linux**
 

src-tauri/src/feat/backup.rs

@@ -33,6 +33,9 @@ async fn finalize_restored_verge_config(
     webdav_username: Option<String>,
     webdav_password: Option<String>,
 ) -> Result<()> {
+    // The lock must cover every restored layer; an unlocked apply races a concurrently staged draft.
+    let config_write = Config::lock_config_write().await;
+
     // A broken restored `verge.yaml` is a restore failure, not a reason to load defaults.
     let mut restored = help::read_yaml::<IVerge>(&verge_path()?).await?;
     restored.webdav_url = webdav_url;
@@ -55,14 +58,10 @@ async fn finalize_restored_verge_config(
     profiles_draft.apply();
 
     let verge_draft = Config::verge().await;
-    {
-        // Hold the write lock so a concurrent patch cannot stage a draft the proxy write reads.
-        let _config_write = Config::lock_config_write().await;
-        verge_draft.edit_draft(|d| {
-            *d = restored.clone();
-        });
-        verge_draft.apply();
-    }
+    verge_draft.edit_draft(|d| {
+        *d = restored.clone();
+    });
+    verge_draft.apply();
 
     // Turn it off here; a failing core side effect below would otherwise skip this step.
     if !restored.enable_system_proxy.unwrap_or_default() {
@@ -80,6 +79,9 @@ async fn finalize_restored_verge_config(
         }
     }
 
+    // `patch_verge` re-acquires the lock through `try_lock_config_write`.
+    drop(config_write);
+
     // Run configuration side effects without rewriting the already-restored file.
     if let Err(err) = super::patch_verge(&restored, true).await {
         logging!(error, Type::Backup, "Failed to apply restored verge config: {err:#}");
@@ -146,10 +148,18 @@ async fn restore_backup_archive(path: PathBuf) -> Result<()> {
         )
     };
 
-    let file = AsyncHandler::spawn_blocking(move || std::fs::File::open(&path)).await??;
-    let mut zip = zip::ZipArchive::new(file)?;
+    let home_dir = app_home_dir()?;
+    AsyncHandler::spawn_blocking(move || -> Result<()> {
+        let file = std::fs::File::open(&path)?;
+        let mut zip = zip::ZipArchive::new(file)?;
+        zip.extract(&home_dir)?;
+        Ok(())
+    })
+    .await
+    .map_err(|join| anyhow!("backup extraction task failed: {join}"))??;
+
+    // Held for the config-data transition only; extraction is plain filesystem work.
     let _profile_write = crate::config::profiles::PROFILE_WRITE_LOCK.lock().await;
-    zip.extract(app_home_dir()?)?;
     finalize_restored_verge_config(webdav_url, webdav_username, webdav_password).await
 }
 

src-tauri/src/feat/clash.rs

@@ -67,11 +67,14 @@ pub async fn change_clash_mode(mode: String) -> Result<(), String> {
     }
 
     let clash = Config::clash().await;
-    clash.edit_draft(|d| d.patch_config(&mapping));
-    clash.apply();
-
-    let clash_data = clash.data_arc();
-    if clash_data.save_config().await.is_ok() {
+    // Serialize with patch transactions: an unlocked commit can flush a staged draft mid-rollback.
+    let save_result = {
+        let _config_write = Config::lock_config_write().await;
+        clash.edit_draft(|d| d.patch_config(&mapping));
+        clash.apply();
+        clash.data_arc().save_config().await
+    };
+    if save_result.is_ok() {
         announce(Refresh::Clash);
         tray::Tray::global().update_menu_and_icon().await;
     }