Updates to add more ads and fix ad types.

lib/widgets/cloud_backup_action_button.dart

@@ -0,0 +1,58 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import '../services/app_state.dart';
+import 'backup_reminder.dart';
+
+/// AppBar action flagging that this device's data isn't fully backed up —
+/// the same "shared widget dropped into every tab's AppBar" pattern
+/// [FaqActionButton] uses. Renders nothing once backup is configured *and*
+/// there's nothing unsynced (see [AppState.hasCloudBackupConfigured] /
+/// [AppState.hasUnsyncedChanges]); there's nothing left to flag at that
+/// point. Covers two different states behind one icon:
+///  - Backup was never set up — tapping opens the setup flow.
+///  - Backup *is* set up but something local hasn't been pushed up yet
+///    (most users, most of the time, since only a paid user auto-syncs on
+///    every change — see [AppState.hasUnsyncedChanges]) — tapping tries a
+///    sync right now, going through the normal ad gate.
+///
+/// The small play-triangle badge marks this as potentially leading to an
+/// ad: syncing needs a rewarded ad to push local changes up on every sync
+/// but the first (see `AdService.showGateAd`) — unless the user has an
+/// active ad-free purchase, in which case syncing is silent and free. The
+/// badge only shows for someone who'd actually see an ad, so a paid user
+/// gets a plain icon instead.
+class CloudBackupActionButton extends StatelessWidget {
+  const CloudBackupActionButton({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final appState = context.watch<AppState>();
+    final configured = appState.hasCloudBackupConfigured;
+    if (configured && !appState.hasUnsyncedChanges) return const SizedBox.shrink();
+
+    final showAdBadge = !appState.adsCurrentlyDisabled;
+    final colors = Theme.of(context).colorScheme;
+    const icon = Icon(Icons.cloud_off_outlined);
+
+    return IconButton(
+      tooltip: configured ? 'Not synced yet — tap to sync now' : 'Not backed up — set up cloud backup',
+      onPressed: () {
+        if (configured) {
+          unawaited(appState.syncNow());
+        } else {
+          openCloudBackupSetup(context);
+        }
+      },
+      icon: showAdBadge
+          ? Badge(
+              backgroundColor: colors.tertiary,
+              label: Icon(Icons.play_arrow, size: 8, color: colors.onTertiary),
+              child: icon,
+            )
+          : icon,
+    );
+  }
+}