diff --git a/frontend/src/components/stacks/ActionStatusBanner.tsx b/frontend/src/components/stacks/ActionStatusBanner.tsx
new file mode 100644
index 0000000..1f1f60e
--- /dev/null
+++ b/frontend/src/components/stacks/ActionStatusBanner.tsx
@@ -0,0 +1,43 @@
+import { CheckCircle2, Loader2, X, XCircle } from "lucide-react";
+import type { StackActionStatus } from "@/hooks/useStackActions";
+
+const TONE = {
+  running: "border-sp-border bg-sp-surface-2 text-sp-text-1",
+  success: "border-sp-green/30 bg-sp-green/10 text-sp-green",
+  error: "border-red-300 bg-red-50 text-red-700 dark:border-red-900/60 dark:bg-red-950/40 dark:text-red-300",
+} as const;
+
+/** Persistent status line for a stack action (start/stop/pull/update/…), shown
+ *  in addition to the transient toast so the outcome doesn't disappear with it. */
+export function ActionStatusBanner({
+  status,
+  onDismiss,
+}: {
+  status: StackActionStatus;
+  onDismiss: () => void;
+}) {
+  return (
+    <div className={`flex items-center gap-2 rounded-card border px-3 py-2 text-sm ${TONE[status.phase]}`}>
+      {status.phase === "running" && (
+        <Loader2 className="h-4 w-4 shrink-0 animate-spin text-accent dark:text-accent-dark" />
+      )}
+      {status.phase === "success" && <CheckCircle2 className="h-4 w-4 shrink-0" />}
+      {status.phase === "error" && <XCircle className="h-4 w-4 shrink-0" />}
+      <span className="flex-1">
+        {status.phase === "running" && `${status.label} ${status.id}…`}
+        {status.phase === "success" && `${status.label} ${status.id} — done`}
+        {status.phase === "error" &&
+          `${status.label} ${status.id} — failed${status.message ? `: ${status.message}` : ""}`}
+      </span>
+      {status.phase !== "running" && (
+        <button
+          onClick={onDismiss}
+          className="shrink-0 opacity-60 transition-opacity hover:opacity-100"
+          aria-label="Dismiss"
+        >
+          <X className="h-4 w-4" />
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/frontend/src/hooks/useStackActions.ts b/frontend/src/hooks/useStackActions.ts
index 070a868..65d9d7e 100644
--- a/frontend/src/hooks/useStackActions.ts
+++ b/frontend/src/hooks/useStackActions.ts
@@ -1,28 +1,52 @@
-import { useState } from "react";
+import { useRef, useState } from "react";
 import { useQueryClient } from "@tanstack/react-query";
 import { toast } from "sonner";
 import { stacksApi } from "@/api/stacks";
 import { apiErrorMessage } from "@/api/client";
 
+export type StackActionPhase = "running" | "success" | "error";
+
+export type StackActionStatus = {
+  id: string;
+  label: string;
+  phase: StackActionPhase;
+  message?: string;
+  at: number;
+};
+
+/** Success banners self-clear so they don't linger forever; errors stay until
+ *  dismissed or the next action overwrites them. */
+const SUCCESS_CLEAR_MS = 5000;
+
 export function useStackActions() {
   const qc = useQueryClient();
   const [busyId, setBusyId] = useState<string | null>(null);
+  const [status, setStatus] = useState<StackActionStatus | null>(null);
+  const clearTimer = useRef<number>();
 
   const run = async (
     id: string,
     label: string,
     fn: (id: string) => Promise<unknown>
   ) => {
+    window.clearTimeout(clearTimer.current);
     setBusyId(id);
+    setStatus({ id, label, phase: "running", at: Date.now() });
     const t = toast.loading(`${label} ${id}…`);
     try {
       await fn(id);
       toast.success(`${label} ${id} ✓`, { id: t });
+      setStatus({ id, label, phase: "success", at: Date.now() });
+      clearTimer.current = window.setTimeout(() => {
+        setStatus((s) => (s?.phase === "success" ? null : s));
+      }, SUCCESS_CLEAR_MS);
       qc.invalidateQueries({ queryKey: ["stacks"] });
       qc.invalidateQueries({ queryKey: ["stack", id] });
       qc.invalidateQueries({ queryKey: ["stack-updates"] });
     } catch (err) {
-      toast.error(apiErrorMessage(err), { id: t });
+      const message = apiErrorMessage(err);
+      toast.error(message, { id: t });
+      setStatus({ id, label, phase: "error", message, at: Date.now() });
     } finally {
       setBusyId(null);
     }
@@ -30,6 +54,11 @@ export function useStackActions() {
 
   return {
     busyId,
+    status,
+    dismissStatus: () => {
+      window.clearTimeout(clearTimer.current);
+      setStatus(null);
+    },
     start: (id: string) => run(id, "Starting", stacksApi.start),
     stop: (id: string) => run(id, "Stopping", stacksApi.stop),
     restart: (id: string) => run(id, "Restarting", stacksApi.restart),
diff --git a/frontend/src/main.tsx b/frontend/src/main.tsx
index 2f30f97..7214f49 100644
--- a/frontend/src/main.tsx
+++ b/frontend/src/main.tsx
@@ -13,7 +13,7 @@ ReactDOM.createRoot(document.getElementById("root")!).render(
   <React.StrictMode>
     <QueryClientProvider client={queryClient}>
       <App />
-      <Toaster position="top-right" richColors theme="system" />
+      <Toaster position="top-right" richColors theme="system" expand visibleToasts={5} />
     </QueryClientProvider>
   </React.StrictMode>
 );
diff --git a/frontend/src/pages/StackDetail.tsx b/frontend/src/pages/StackDetail.tsx
index 38cfa76..6e3b111 100644
--- a/frontend/src/pages/StackDetail.tsx
+++ b/frontend/src/pages/StackDetail.tsx
@@ -17,6 +17,7 @@ import { Badge, Button, Card, Input, Spinner, StatusDot } from "@/components/ui"
 import { ConfirmDialog } from "@/components/ui/ConfirmDialog";
 import { LogViewer } from "@/components/stacks/LogViewer";
 import { ContainerCard } from "@/components/stacks/ContainerCard";
+import { ActionStatusBanner } from "@/components/stacks/ActionStatusBanner";
 import { AutoUpdatePanel } from "@/components/stacks/AutoUpdatePanel";
 import { SecretsPanel } from "@/components/stacks/SecretsPanel";
 import { BackupButton } from "@/components/stacks/BackupRestore";
@@ -91,6 +92,10 @@ export function StackDetail() {
         )}
       </div>
 
+      {actions.status && (
+        <ActionStatusBanner status={actions.status} onDismiss={actions.dismissStatus} />
+      )}
+
       {/* Tabs */}
       <div className="flex gap-1 border-b border-slate-200 dark:border-slate-700">
         {TABS.map((t) => (