feat: show update notification in TUI and footer (#1204)

src/cli/App.tsx

@@ -967,6 +967,7 @@ export default function App({
   showCompactions = false,
   agentProvenance = null,
   releaseNotes = null,
+  updateNotification = null,
   sessionContextReminderEnabled = true,
 }: {
   agentId: string;
@@ -988,6 +989,7 @@ export default function App({
   showCompactions?: boolean;
   agentProvenance?: AgentProvenance | null;
   releaseNotes?: string | null; // Markdown release notes to display above header
+  updateNotification?: string | null; // Latest version when a significant auto-update was applied
   sessionContextReminderEnabled?: boolean;
 }) {
   // Warm the model-access cache in the background so /model is fast on first open.
@@ -1707,6 +1709,31 @@ export default function App({
   // Static items (things that are done rendering and can be frozen)
   const [staticItems, setStaticItems] = useState<StaticItem[]>([]);
 
+  // Show in-transcript notification when auto-update applied a significant new version
+  const [footerUpdateText, setFooterUpdateText] = useState<string | null>(null);
+  useEffect(() => {
+    if (!updateNotification) return;
+    setStaticItems((prev) => {
+      if (prev.some((item) => item.id === "update-notification")) return prev;
+      return [
+        ...prev,
+        {
+          kind: "status" as const,
+          id: "update-notification",
+          lines: [
+            `A new version of Letta Code is available (**${updateNotification}**). Restart to update!`,
+          ],
+        },
+      ];
+    });
+    // Also show briefly in the footer placeholder area
+    setFooterUpdateText(
+      `New version available (${updateNotification}). Restart to update!`,
+    );
+    const timer = setTimeout(() => setFooterUpdateText(null), 8000);
+    return () => clearTimeout(timer);
+  }, [updateNotification]);
+
   // Track committed ids to avoid duplicates
   const emittedIdsRef = useRef<Set<string>>(new Set());
 
@@ -12743,6 +12770,7 @@ If using apply_patch, use this exact relative patch path: ${applyPatchRelativePa
                 statusLineRight={statusLine.rightText || undefined}
                 statusLinePadding={statusLine.padding || 0}
                 statusLinePrompt={statusLine.prompt}
+                footerNotification={footerUpdateText}
               />
             </Box>