chore(core): document watcher exit conditions

src-tauri/src/cmd/proxy.rs

@@ -84,6 +84,7 @@ pub async fn sync_tray_proxy_selection() -> CmdResult<()> {
 }
 
 async fn run_tray_sync_loop() {
+    // Permanent watcher: keeps syncing until a pass finds no pending sync request.
     loop {
         match Tray::global().update_menu().await {
             Ok(_) => {

src-tauri/src/core/updater.rs

@@ -490,6 +490,7 @@ impl SilentUpdater {
     }
 
     pub async fn start_background_check(&self, app_handle: tauri::AppHandle) {
+        // Permanent watcher: daily update cycles for the lifetime of the app.
         logging!(info, Type::System, "Silent updater: background task started");
 
         tokio::time::sleep(std::time::Duration::from_secs(10)).await;