Revert "fix(theme/windows): switch to dark-light based theme detection"

This reverts commit 1c044f053f.

src-tauri/src/utils/resolve/mod.rs

@@ -22,8 +22,6 @@ use clash_verge_signal;
 
 pub mod dns;
 pub mod scheme;
-#[cfg(target_os = "windows")]
-pub mod theme;
 pub mod ui;
 pub mod window;
 pub mod window_script;
@@ -66,8 +64,6 @@ pub fn resolve_setup_async() {
         init_verge_config().await;
         Config::verify_config_initialization().await;
         init_window().await;
-        #[cfg(target_os = "windows")]
-        theme::start_windows_app_theme_watcher();
 
         let core_init = AsyncHandler::spawn(|| async {
             init_service_manager().await;

src-tauri/src/utils/resolve/theme.rs

@@ -1,55 +0,0 @@
-//! Windows app theme watcher.
-//!
-//! NOTE:
-//! Tauri's theme API is unreliable on Windows and may miss or delay
-//! system theme change events. As a workaround, we poll the system
-//! theme via the `dark-light` crate and emit a custom
-//! `verge://app-theme-changed` event to keep the frontend in sync.
-//!
-//! Windows-only, best-effort.
-
-use std::time::Duration;
-
-use dark_light::{Mode as SystemTheme, detect as detect_system_theme};
-use tauri::Emitter as _;
-
-use crate::{core::handle, process::AsyncHandler};
-
-const APP_THEME_EVENT: &str = "verge://app-theme-changed";
-
-fn resolve_apps_theme_mode() -> Option<&'static str> {
-    match detect_system_theme().ok()? {
-        SystemTheme::Dark => Some("dark"),
-        SystemTheme::Light => Some("light"),
-        SystemTheme::Unspecified => None,
-    }
-}
-
-pub fn start_windows_app_theme_watcher() {
-    AsyncHandler::spawn(|| async move {
-        let app_handle = handle::Handle::app_handle().clone();
-        let mut last_theme = resolve_apps_theme_mode();
-
-        if let Some(theme) = last_theme {
-            let _ = app_handle.emit(APP_THEME_EVENT, theme);
-        }
-
-        loop {
-            if handle::Handle::global().is_exiting() {
-                break;
-            }
-
-            tokio::time::sleep(Duration::from_millis(500)).await;
-            let Some(theme) = resolve_apps_theme_mode() else {
-                continue;
-            };
-
-            if last_theme.as_ref() == Some(&theme) {
-                continue;
-            }
-
-            last_theme = Some(theme);
-            let _ = app_handle.emit(APP_THEME_EVENT, theme);
-        }
-    });
-}