[eric] tree: group app/components HUD/search/gates/pickers into overlays/

frontend/src/app/components/Layout/AppShell.tsx

@@ -32,7 +32,7 @@ import LinearProgress from '@mui/material/LinearProgress';
 import CircularProgress from '@mui/material/CircularProgress';
 // Settings modal lazy-loaded so its 2.3K LOC + Stripe/OAuth helpers don't ship on first paint.
 const Settings = React.lazy(() => import('@/app/pages/Settings/Settings'));
-import DynamicIsland from '@/app/components/DynamicIsland';
+import DynamicIsland from '@/app/components/overlays/DynamicIsland';
 import Dashboard from '@/app/pages/Dashboard/Dashboard';
 import DashboardHost from '@/app/components/Layout/DashboardHost';
 import { useLastDashboardId } from '@/shared/hooks/useLastDashboardId';

frontend/src/app/components/overlays/DynamicIsland.tsx

@@ -31,7 +31,7 @@ import { API_BASE, getAuthToken } from '@/shared/config';
 import { store } from '@/shared/state/store';
 import { setPendingFocusAgentId } from '@/shared/state/tempStateSlice';
 import ApprovalBar, { BatchApprovalBar, parseMcpToolName, useMcpToolMeta, getToolIcon } from '@/app/pages/AgentChat/shell/ApprovalBar';
-import GlobalSearchPalette from '@/app/components/GlobalSearchPalette';
+import GlobalSearchPalette from '@/app/components/overlays/GlobalSearchPalette';
 import { useClaudeTokens } from '@/shared/styles/ThemeContext';
 
 type IslandState = 'idle' | 'compact' | 'compact-actionable' | 'expanded';