revert(safety): remove Emergency Stop for desktop automation (#4600)

app/src/App.tsx

@@ -30,8 +30,6 @@ import SecretPromptDialog from './components/mcp-setup/SecretPromptDialog';
 import OpenhumanLinkModal from './components/OpenhumanLinkModal';
 import PersistRehydrationScreen from './components/PersistRehydrationScreen';
 import PttHotkeyManager from './components/PttHotkeyManager';
-import { AutomationHaltedBanner } from './components/safety/AutomationHaltedBanner';
-import { EmergencyStopButton } from './components/safety/EmergencyStopButton';
 import SecurityBanner from './components/SecurityBanner';
 import SettingsModal from './components/settings/modal/SettingsModal';
 import { resolveSettingsOverlay } from './components/settings/modal/settingsOverlay';
@@ -59,7 +57,6 @@ import {
   startInternetStatusListener,
   stopInternetStatusListener,
 } from './services/internetStatusListener';
-import { hydrateEmergencyState } from './services/safety/hydrateEmergencyState';
 import {
   hideWebviewAccount,
   startWebviewAccountService,
@@ -259,16 +256,6 @@ export function AppShellDesktop() {
   // the core is ready (once per boot). Extracted to a hook so it's testable.
   useNotchBootSync(isBootstrapping);
 
-  // Boot hydration: read the authoritative halt state from the core once on
-  // mount so the UI reflects any halt that was engaged before this window
-  // opened (e.g. another tab, CLI, or a crash-recovery scenario). Errors are
-  // swallowed inside hydrateEmergencyState so a degraded core never blanks the shell.
-  useEffect(() => {
-    void hydrateEmergencyState(dispatch);
-    // Intentionally runs once on mount only.
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
-
   const scrollRef = useRef<HTMLDivElement>(null);
   const navType = useNavigationType();
 
@@ -304,9 +291,6 @@ export function AppShellDesktop() {
 
   const content = (
     <div ref={scrollRef} className="relative h-full overflow-y-auto">
-      {/* Automation halt banner — renders at the top of the content area when
-          emergency stop is engaged. Always visible during automation sessions. */}
-      <AutomationHaltedBanner />
       <GlobalUpsellBanner />
       <AppRoutes location={baseLocation} />
       {activeProviderAccount && !accountsOverlayOpen && (
@@ -348,17 +332,6 @@ export function AppShellDesktop() {
             exhaustion). Mounted outside the routes so entries survive route
             changes and background-job completion. */}
         <UserErrorCenter />
-        {/* Emergency Stop — persistent safety control pinned to the top-right,
-            clear of the chat composer (bottom) and the sidebar (left); the
-            macOS traffic lights sit top-left, so the top-right stays free. The
-            button hides itself while halted (the AutomationHaltedBanner's
-            Resume takes over). Only shown when the shell chrome is visible
-            (i.e. the user is authenticated and past onboarding). */}
-        {!chromeless && (
-          <div className="fixed top-3 right-4 z-50">
-            <EmergencyStopButton />
-          </div>
-        )}
         {/* Hidden Remotion-driven producer for the Meet camera. Mounts a
             640×480 JPEG frame stream to the Rust frame bus while a meet
             call is active; idle no-op otherwise. See