fix(service): fall back to elevated sidecar on path permission rejection

Preserve TUN settings and restore proxy operation after fallback.
Deliver fallback notices after UI subscription and stop retrying
deterministic bundle refusals. Publish fallback state atomically
and avoid conflicting service startup notifications.

src-tauri/src/cmd/service.rs

@@ -57,6 +57,11 @@ pub async fn continue_with_sidecar() -> CmdResult {
         .map_err(|error| proxy_aware_coded_error(&error, "SERVICE_SIDECAR_FAILED"))
 }
 
+#[tauri::command]
+pub fn take_service_fallback_notice() -> bool {
+    crate::core::service::take_service_fallback_notice()
+}
+
 #[tauri::command]
 pub fn sync_runtime_providers() {
     if matches!(*CoreManager::global().get_running_mode(), RunningMode::Service) {