fix(service): explain sidecar failures and clear recovered notices

src/services/cmds.ts

@@ -467,6 +467,15 @@ export const getPendingFailures = async () => {
   return invoke<PendingFailure[]>('get_pending_failures')
 }
 
+export interface SidecarFailureSnapshot {
+  revision: number
+  detail: string | null
+}
+
+export const getSidecarFailure = async () => {
+  return invoke<SidecarFailureSnapshot>('get_sidecar_failure')
+}
+
 export const getAppUptime = async () => {
   return invoke<number>('get_app_uptime')
 }