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>

.gitignore

@@ -16,4 +16,7 @@ coverage
 .cxx/
 android/app/.cxx/
 **/ComponentDescriptors.cpp.o
-**/react_codegen_rngesturehandler_codegen.dir/
+**/react_codegen_rngesturehandler_codegen.dir/
+
+# Local Claude Code session data (never push)
+.claude/