feat(mobile): add confirmation dialog to permanent delete action (#26442)

mobile/lib/widgets/asset_grid/permanent_delete_dialog.dart

@@ -0,0 +1,47 @@
+import 'package:flutter/material.dart';
+import 'package:immich_mobile/extensions/build_context_extensions.dart';
+import 'package:immich_mobile/generated/translations.g.dart';
+import 'package:immich_ui/immich_ui.dart';
+
+class PermanentDeleteDialog extends StatelessWidget {
+  const PermanentDeleteDialog({super.key, required this.count});
+
+  final int count;
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(10))),
+      title: Text(context.t.permanently_delete),
+      content: ImmichFormattedText(context.t.permanently_delete_assets_prompt(count: count)),
+      actions: [
+        SizedBox(
+          width: double.infinity,
+          height: 48,
+          child: FilledButton(
+            onPressed: () => context.pop(false),
+            style: FilledButton.styleFrom(
+              backgroundColor: context.colorScheme.surfaceDim,
+              foregroundColor: context.primaryColor,
+            ),
+            child: Text(context.t.cancel, style: const TextStyle(fontWeight: FontWeight.bold)),
+          ),
+        ),
+        const SizedBox(height: 8),
+        SizedBox(
+          width: double.infinity,
+          height: 48,
+
+          child: FilledButton(
+            onPressed: () => context.pop(true),
+            style: FilledButton.styleFrom(
+              backgroundColor: context.colorScheme.errorContainer,
+              foregroundColor: context.colorScheme.onErrorContainer,
+            ),
+            child: Text(context.t.delete, style: const TextStyle(fontWeight: FontWeight.bold)),
+          ),
+        ),
+      ],
+    );
+  }
+}