fix(config): stop rewriting unchanged configs on exit (#8017)

* fix(config): stop rewriting unchanged configs on exit

apply_all_and_save_file() committed the drafts and then saved clash.yaml,
verge.yaml and profiles.yaml unconditionally. With nothing staged that write
replaced each file with content equal to what was already on disk - fields are
encrypted with a fresh nonce, so the bytes differ every time - which reset the
files' creation time on every exit (#7759).

Draft::apply now reports whether it committed a draft, and the exit path saves
only the configs that had one.

* refactor(tests): remove test snippets

Signed-off-by: ❤是纱雾酱哟～ <49941141+Dragon1573@users.noreply.github.com>

* docs(changelog): add entry of the PR modifications

Assisted-by: Gemini 3.8 Flash Medium (VSCode Copilot Chat)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: ❤是纱雾酱哟～ <49941141+Dragon1573@users.noreply.github.com>

---------

Signed-off-by: ❤是纱雾酱哟～ <49941141+Dragon1573@users.noreply.github.com>
Co-authored-by: sdhfsl <sdhfsl@users.noreply.github.com>
Co-authored-by: ❤是纱雾酱哟～ <49941141+Dragon1573@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Changelog.md

@@ -24,6 +24,8 @@
 <details>
 <summary><strong> 🐞 修复问题 </strong></summary>
 
+- 修复应用退出时无条件重写 `clash.yaml`、`verge.yaml` 和 `profiles.yaml` 导致文件创建时间丢失的问题
+
 - 修复检测更新后又发布新版时，应用内更新失败
 - 修复订阅响应过大导致内存占用过高，限制单次下载为 4 MiB
 - 修复全局模式默认停在 `DIRECT` 或 `REJECT` 导致流量未经代理，现自动切换到第一个策略组

crates/clash-verge-draft/src/lib.rs

@@ -74,12 +74,16 @@ impl<T: Clone> Draft<T> {
         result
     }
 
-    /// Commits and clears the draft.
+    /// Commits and clears the draft, reporting whether one was staged.
     #[inline]
-    pub fn apply(&self) {
+    pub fn apply(&self) -> bool {
         let mut guard = self.inner.data.lock();
-        if let Some(d) = guard.1.take() {
-            guard.0 = d;
+        match guard.1.take() {
+            Some(d) => {
+                guard.0 = d;
+                true
+            }
+            None => false,
         }
     }
 

src-tauri/src/config/config.rs

@@ -280,25 +280,29 @@ impl Config {
     }
 
     /// Commits drafts during exit/restart/shutdown so user changes are not lost.
+    /// A config with nothing staged keeps its file, so its timestamps stay put.
     pub async fn apply_all_and_save_file() {
         logging!(debug, Type::Config, "save all draft data");
         let save_clash_task = AsyncHandler::spawn(|| async {
             let clash = Self::clash().await;
-            clash.apply();
-            logging_error!(Type::Config, clash.data_arc().save_config().await);
+            if clash.apply() {
+                logging_error!(Type::Config, clash.data_arc().save_config().await);
+            }
         });
 
         let save_verge_task = AsyncHandler::spawn(|| async {
             let verge = Self::verge().await;
-            verge.apply();
-            logging_error!(Type::Config, verge.data_arc().save_file().await);
+            if verge.apply() {
+                logging_error!(Type::Config, verge.data_arc().save_file().await);
+            }
         });
 
         let save_profiles_task = AsyncHandler::spawn(|| async {
             let _profile_write = super::profiles::PROFILE_WRITE_LOCK.lock().await;
             let profiles = Self::profiles().await;
-            profiles.apply();
-            logging_error!(Type::Config, profiles.data_arc().save_file().await);
+            if profiles.apply() {
+                logging_error!(Type::Config, profiles.data_arc().save_file().await);
+            }
         });
 
         let _ = tokio::join!(save_clash_task, save_verge_task, save_profiles_task);