Add global search, in-app + push notifications, and fix card/beneficiary/scroll issues

- Global feature search for the user app, wired to the home search icon
- Notifications screen: swipe-to-delete, vanish animation, unread badge,
  and Notifee-backed foreground + background (scheduled) OS notifications
- Fix Add Beneficiary save (single source of truth via beneficiaries slice)
- Fix Cards tab scroll freeze and bottom blank space (use ScreenShell scroll)
- User-friendly toast copy across the app
- Android build tuning: parallel/caching/JVM G1 args, mobile-only ABIs

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/services/notifications/pushNotifications.ts

@@ -1,9 +1,130 @@
-import { PermissionsAndroid, Platform } from 'react-native';
+import notifee, {
+  AndroidImportance,
+  AuthorizationStatus,
+  TriggerType,
+  type TimestampTrigger,
+} from '@notifee/react-native';
 
-export const registerForPushNotifications = async () => {
-  if (Platform.OS === 'android' && Platform.Version >= 33) {
-    return PermissionsAndroid.request(PermissionsAndroid.PERMISSIONS.POST_NOTIFICATIONS);
-  }
+import type { NotificationCategory } from '../../types/app';
 
-  return 'granted';
+const CHANNEL_ID = 'bankcbs-general';
+
+export type DummyNotificationContent = {
+  category: NotificationCategory;
+  title: string;
+  body: string;
+};
+
+const DUMMY_POOL: DummyNotificationContent[] = [
+  {
+    category: 'transaction',
+    title: 'Money received',
+    body: '₹4,200 was credited to your Savings account from Rohan Mehta.',
+  },
+  {
+    category: 'transaction',
+    title: 'Payment successful',
+    body: 'Your payment of ₹1,150 for a mobile recharge went through.',
+  },
+  {
+    category: 'security',
+    title: 'New sign-in detected',
+    body: 'A new sign-in was detected on your account. Tap to review.',
+  },
+  {
+    category: 'offer',
+    title: 'Reward unlocked',
+    body: 'You just earned 250 reward points on your last card spend.',
+  },
+  {
+    category: 'reminder',
+    title: 'Bill reminder',
+    body: 'Your electricity bill of ₹2,340 is due in 3 days.',
+  },
+];
+
+const DEFAULT_CONTENT: DummyNotificationContent = DUMMY_POOL[0] ?? {
+  category: 'system',
+  title: 'New notification',
+  body: 'You have a new update.',
+};
+
+export const getDummyNotificationContent = (): DummyNotificationContent => {
+  const index = Math.floor(Math.random() * DUMMY_POOL.length);
+  return DUMMY_POOL[index] ?? DEFAULT_CONTENT;
+};
+
+let channelReady = false;
+
+const ensureChannel = async () => {
+  if (!channelReady) {
+    await notifee.createChannel({
+      id: CHANNEL_ID,
+      name: 'General alerts',
+      importance: AndroidImportance.HIGH,
+    });
+    channelReady = true;
+  }
+  return CHANNEL_ID;
+};
+
+/** Request OS notification permission and make sure the Android channel exists. */
+export const registerForPushNotifications = async () => {
+  const settings = await notifee.requestPermission();
+  await ensureChannel();
+
+  const granted =
+    settings.authorizationStatus === AuthorizationStatus.AUTHORIZED ||
+    settings.authorizationStatus === AuthorizationStatus.PROVISIONAL;
+
+  return granted ? 'granted' : 'denied';
+};
+
+/**
+ * Show a notification immediately. While the app is in the foreground this
+ * appears as a heads-up popup (HIGH importance channel); it also lands in the
+ * system tray.
+ */
+export const displayLocalNotification = async (content: DummyNotificationContent) => {
+  const channelId = await ensureChannel();
+  await notifee.displayNotification({
+    title: content.title,
+    body: content.body,
+    android: {
+      channelId,
+      smallIcon: 'ic_launcher',
+      importance: AndroidImportance.HIGH,
+      pressAction: { id: 'default' },
+    },
+  });
+};
+
+/**
+ * Schedule a notification to fire after `seconds`. This is how we demo a
+ * background notification: trigger it, then minimise the app and it arrives in
+ * the system tray even though the app is no longer in the foreground.
+ */
+export const scheduleLocalNotification = async (
+  content: DummyNotificationContent,
+  seconds = 5,
+) => {
+  const channelId = await ensureChannel();
+  const trigger: TimestampTrigger = {
+    type: TriggerType.TIMESTAMP,
+    timestamp: Date.now() + seconds * 1000,
+  };
+
+  await notifee.createTriggerNotification(
+    {
+      title: content.title,
+      body: content.body,
+      android: {
+        channelId,
+        smallIcon: 'ic_launcher',
+        importance: AndroidImportance.HIGH,
+        pressAction: { id: 'default' },
+      },
+    },
+    trigger,
+  );
 };