refactor: windows autostart (#5941)

* refactor(windows-autostart): switch to scheduled tasks with user/admin split

* fix(schtasks): decode stdout/stderr using Windows OEM/ANSI code pages

* refactor(ui): remove admin auto-launch warning and clean i18n

* feat(windows): user-level auto-launch via task XML

* docs: Changelog.md

src-tauri/src/utils/mod.rs

@@ -1,4 +1,3 @@
-pub mod autostart;
 pub mod dirs;
 pub mod format;
 pub mod help;
@@ -9,6 +8,8 @@ pub mod linux;
 pub mod network;
 pub mod notification;
 pub mod resolve;
+#[cfg(target_os = "windows")]
+pub mod schtasks;
 pub mod server;
 pub mod singleton;
 pub mod tmpl;