Redesign mobile time clock, add shortcuts, and improve account management.

Add iOS Shortcuts/Siri intents, local send-reminder notifications, stable
client picker with last-client defaults, account refresh/remove, and softer
session handling on unauthorized API responses.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/(app)/_layout.tsx

@@ -2,6 +2,8 @@ import { Platform } from "react-native";
 import { NativeTabs } from "expo-router/unstable-native-tabs";
 
 import { AppLockOverlay } from "@/components/AppLockOverlay";
+import { InvoiceReminderSync } from "@/components/InvoiceReminderSync";
+import { ShortcutHandler } from "@/components/ShortcutHandler";
 import { useAppTheme } from "@/contexts/ThemeContext";
 import { AppLockProvider } from "@/contexts/AppLockContext";
 
@@ -71,6 +73,8 @@ export default function AppLayout() {
           <NativeTabs.Trigger.Label>Settings</NativeTabs.Trigger.Label>
         </NativeTabs.Trigger>
       </NativeTabs>
+      <InvoiceReminderSync />
+      <ShortcutHandler />
       <AppLockOverlay />
     </AppLockProvider>
   );