fix: Project action terminal lifecycle (#3287)

* fix(terminal): make command sessions own action lifecycle

* fix(ui): reconcile project action terminal state

* feat(ui): show running project actions in terminal tabs

* feat(ui): run project actions from linked worktrees

* fix(ui): guard project action reconciliation

* fix(ui): scope project action preview fallback

* fix(ui): default project actions to worktrees

* fix(ui): reveal project action terminals

* fix(ui): retain terminal output after snapshot replay

* fix(ui): restore running action terminals on revisit

packages/ui/src/apps/MobileApp.tsx

@@ -18,6 +18,7 @@ import { TooltipProvider } from '@/components/ui/tooltip';
 import { Toaster } from '@/components/ui/sonner';
 import { usePushVisibilityBeacon } from '@/hooks/usePushVisibilityBeacon';
 import { useRouter } from '@/hooks/useRouter';
+import { useTerminalSessionKeepalive } from '@/hooks/useTerminalSessionKeepalive';
 import { useUpdatePolling } from '@/hooks/useUpdatePolling';
 import { useWindowTitle } from '@/hooks/useWindowTitle';
 import { opencodeClient } from '@/lib/opencode/client';
@@ -105,6 +106,10 @@ type MobileSurface = 'instances' | 'settings' | 'update';
 
 const MobileShell: React.FC<{ onActiveConnectionDeleted: () => void }> = ({ onActiveConnectionDeleted }) => {
   const { t } = useI18n();
+  // The mobile root does not mount MainLayout, so it owns its own terminal
+  // keepalive: without it, background PTYs (running project actions included)
+  // are idle-reaped by the server while the workspace drawer is closed.
+  useTerminalSessionKeepalive();
   const [sessionsSheetOpen, setSessionsSheetOpen] = React.useState(false);
   const [activeSurface, setActiveSurface] = React.useState<MobileSurface | null>(null);
   // Phone right drawer with the workspace tabs; the tab persists across