feat(i18n): add internationalization support for tray menu

- Implement TrayTexts struct to manage multilingual tray menu text
- Auto-refresh tray menu when language settings change
- Add missing notification message translations
- Format code for consistency

src-tauri/tests/app_type_parse.rs

@@ -6,7 +6,10 @@ use cc_switch_lib::AppType;
 fn parse_known_apps_case_insensitive_and_trim() {
     assert!(matches!(AppType::from_str("claude"), Ok(AppType::Claude)));
     assert!(matches!(AppType::from_str("codex"), Ok(AppType::Codex)));
-    assert!(matches!(AppType::from_str(" ClAuDe \n"), Ok(AppType::Claude)));
+    assert!(matches!(
+        AppType::from_str(" ClAuDe \n"),
+        Ok(AppType::Claude)
+    ));
     assert!(matches!(AppType::from_str("\tcoDeX\t"), Ok(AppType::Codex)));
 }