chore(deps): update rust crate rust-i18n to v4 (#6784)

* chore(deps): update rust crate rust-i18n to v4

* fix: migrate rust-i18n to v4 with Cow-first zero-copy approach

- Adapt to v4 breaking changes: available_locales!() returns Vec<Cow<'static, str>>
- Cache locales in LazyLock<Vec<Cow<'static, str>>> to avoid repeated Vec alloc + sort
- Propagate Cow<'static, str> through resolve/current/system_language APIs
- Fix t! macro args branch: into_owned() + Cow::Owned for type correctness
- Eliminate double resolve in sync_locale (skip redundant set_locale indirection)
- Replace .to_string() with .into_owned() / Cow passthrough in updater.rs

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Tunglies <77394545+Tunglies@users.noreply.github.com>

Cargo.lock

@@ -6261,12 +6261,11 @@ dependencies = [
 
 [[package]]
 name = "rust-i18n"
-version = "3.1.5"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fda2551fdfaf6cc5ee283adc15e157047b92ae6535cf80f6d4962d05717dc332"
+checksum = "21031bf5e6f2c0ae745d831791c403608e99a8bd3776c7e5e5535acd70c3b7ba"
 dependencies = [
  "globwalk",
- "once_cell",
  "regex",
  "rust-i18n-macro",
  "rust-i18n-support",
@@ -6275,12 +6274,11 @@ dependencies = [
 
 [[package]]
 name = "rust-i18n-macro"
-version = "3.1.5"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "22baf7d7f56656d23ebe24f6bb57a5d40d2bce2a5f1c503e692b5b2fa450f965"
+checksum = "51fe5295763b358606f7ca26a564e20f4469775a57ec1f09431249a33849ff52"
 dependencies = [
  "glob",
- "once_cell",
  "proc-macro2",
  "quote",
  "rust-i18n-support",
@@ -6292,9 +6290,9 @@ dependencies = [
 
 [[package]]
 name = "rust-i18n-support"
-version = "3.1.5"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "940ed4f52bba4c0152056d771e563b7133ad9607d4384af016a134b58d758f19"
+checksum = "69bcc115c8eea2803aa3d85362e339776f4988a0349f2f475af572e497443f6f"
 dependencies = [
  "arc-swap",
  "base62",
@@ -6302,7 +6300,6 @@ dependencies = [
  "itertools 0.11.0",
  "lazy_static",
  "normpath",
- "once_cell",
  "proc-macro2",
  "regex",
  "serde",

crates/clash-verge-i18n/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-rust-i18n = "3.1.5"
+rust-i18n = "4.0.0"
 sys-locale = "0.3.2"
 
 [lints]

crates/clash-verge-i18n/src/lib.rs

@@ -1,8 +1,12 @@
 use rust_i18n::i18n;
+use std::borrow::Cow;
+use std::sync::LazyLock;
 
 const DEFAULT_LANGUAGE: &str = "zh";
 i18n!("locales", fallback = "zh");
 
+static SUPPORTED_LOCALES: LazyLock<Vec<Cow<'static, str>>> = LazyLock::new(|| rust_i18n::available_locales!());
+
 #[inline]
 fn locale_alias(locale: &str) -> Option<&'static str> {
     match locale {
@@ -14,54 +18,51 @@ fn locale_alias(locale: &str) -> Option<&'static str> {
 }
 
 #[inline]
-fn resolve_supported_language(language: &str) -> Option<&'static str> {
+fn resolve_supported_language(language: &str) -> Option<Cow<'static, str>> {
     if language.is_empty() {
         return None;
     }
     let normalized = language.to_lowercase().replace('_', "-");
     let segments: Vec<&str> = normalized.split('-').collect();
-    let supported = rust_i18n::available_locales!();
     for i in (1..=segments.len()).rev() {
         let prefix = segments[..i].join("-");
         if let Some(alias) = locale_alias(&prefix)
-            && let Some(&found) = supported.iter().find(|&&l| l.eq_ignore_ascii_case(alias))
+            && let Some(found) = SUPPORTED_LOCALES.iter().find(|l| l.eq_ignore_ascii_case(alias))
         {
-            return Some(found);
+            return Some(found.clone());
         }
-        if let Some(&found) = supported.iter().find(|&&l| l.eq_ignore_ascii_case(&prefix)) {
-            return Some(found);
+        if let Some(found) = SUPPORTED_LOCALES.iter().find(|l| l.eq_ignore_ascii_case(&prefix)) {
+            return Some(found.clone());
         }
     }
     None
 }
 
 #[inline]
-fn current_language(language: Option<&str>) -> &str {
+fn current_language(language: Option<&str>) -> Cow<'static, str> {
     language
-        .as_ref()
         .filter(|lang| !lang.is_empty())
-        .and_then(|lang| resolve_supported_language(lang))
+        .and_then(resolve_supported_language)
         .unwrap_or_else(system_language)
 }
 
 #[inline]
-pub fn system_language() -> &'static str {
+pub fn system_language() -> Cow<'static, str> {
     sys_locale::get_locale()
         .as_deref()
         .and_then(resolve_supported_language)
-        .unwrap_or(DEFAULT_LANGUAGE)
+        .unwrap_or(Cow::Borrowed(DEFAULT_LANGUAGE))
 }
 
 #[inline]
 pub fn sync_locale(language: Option<&str>) {
-    let language = current_language(language);
-    set_locale(language);
+    rust_i18n::set_locale(&current_language(language));
 }
 
 #[inline]
 pub fn set_locale(language: &str) {
-    let lang = resolve_supported_language(language).unwrap_or(DEFAULT_LANGUAGE);
-    rust_i18n::set_locale(lang);
+    let lang = resolve_supported_language(language).unwrap_or(Cow::Borrowed(DEFAULT_LANGUAGE));
+    rust_i18n::set_locale(&lang);
 }
 
 #[inline]
@@ -76,11 +77,11 @@ macro_rules! t {
     };
     ($key:expr, $($arg_name:ident = $arg_value:expr),*) => {
         {
-            let mut _text = $crate::translate(&$key);
+            let mut _text = $crate::translate(&$key).into_owned();
             $(
                 _text = _text.replace(&format!("{{{}}}", stringify!($arg_name)), &$arg_value);
             )*
-            _text
+            ::std::borrow::Cow::<'static, str>::Owned(_text)
         }
     };
 }
@@ -91,13 +92,13 @@ mod test {
 
     #[test]
     fn test_resolve_supported_language() {
-        assert_eq!(resolve_supported_language("en"), Some("en"));
-        assert_eq!(resolve_supported_language("en-US"), Some("en"));
-        assert_eq!(resolve_supported_language("zh"), Some("zh"));
-        assert_eq!(resolve_supported_language("zh-CN"), Some("zh"));
-        assert_eq!(resolve_supported_language("zh-Hant"), Some("zhtw"));
-        assert_eq!(resolve_supported_language("jp"), Some("jp"));
-        assert_eq!(resolve_supported_language("ja-JP"), Some("jp"));
+        assert_eq!(resolve_supported_language("en").as_deref(), Some("en"));
+        assert_eq!(resolve_supported_language("en-US").as_deref(), Some("en"));
+        assert_eq!(resolve_supported_language("zh").as_deref(), Some("zh"));
+        assert_eq!(resolve_supported_language("zh-CN").as_deref(), Some("zh"));
+        assert_eq!(resolve_supported_language("zh-Hant").as_deref(), Some("zhtw"));
+        assert_eq!(resolve_supported_language("jp").as_deref(), Some("jp"));
+        assert_eq!(resolve_supported_language("ja-JP").as_deref(), Some("jp"));
         assert_eq!(resolve_supported_language("fr"), None);
     }
 }

src-tauri/src/core/updater.rs

@@ -294,10 +294,10 @@ impl SilentUpdater {
     async fn ask_user_to_install(app_handle: &tauri::AppHandle, version: &str) -> bool {
         use tauri_plugin_dialog::{DialogExt as _, MessageDialogButtons, MessageDialogKind};
 
-        let title = clash_verge_i18n::t!("notifications.updateReady.title").to_string();
+        let title = clash_verge_i18n::t!("notifications.updateReady.title");
         let body = clash_verge_i18n::t!("notifications.updateReady.body").replace("{version}", version);
-        let install_now = clash_verge_i18n::t!("notifications.updateReady.installNow").to_string();
-        let later = clash_verge_i18n::t!("notifications.updateReady.later").to_string();
+        let install_now = clash_verge_i18n::t!("notifications.updateReady.installNow").into_owned();
+        let later = clash_verge_i18n::t!("notifications.updateReady.later").into_owned();
 
         let (tx, rx) = tokio::sync::oneshot::channel();