feat: Murattal player enhancements & prayer schedule auto-scroll

- Murattal: Spotify-style 5-button controls [Shuffle, Prev, Play, Next, Playlist]
- Murattal: Animated 7-bar equalizer visualization in player circle
- Murattal: Unsplash API background with frosted glass player overlay
- Murattal: Transparent AppBar with backdrop blur
- Murattal: Surah playlist bottom sheet with full 114 Surah list
- Murattal: Auto-play disabled on screen open, enabled on navigation
- Murattal: Shuffle mode for random Surah playback
- Murattal: Photographer attribution per Unsplash guidelines
- Dashboard: Auto-scroll prayer schedule to next active prayer
- Fix: setState lifecycle errors on Reading & Murattal screens
- Setup: flutter_dotenv, cached_network_image, url_launcher deps

lib/data/local/models/checklist_item.dart

@@ -0,0 +1,34 @@
+import 'package:hive_flutter/hive_flutter.dart';
+
+part 'checklist_item.g.dart';
+
+/// A single checklist item definition (template, not daily state).
+@HiveType(typeId: 1)
+class ChecklistItem extends HiveObject {
+  @HiveField(0)
+  String id;
+
+  @HiveField(1)
+  String title;
+
+  @HiveField(2)
+  String category;
+
+  @HiveField(3)
+  String? subtitle;
+
+  @HiveField(4)
+  int sortOrder;
+
+  @HiveField(5)
+  bool isCustom;
+
+  ChecklistItem({
+    required this.id,
+    required this.title,
+    required this.category,
+    this.subtitle,
+    required this.sortOrder,
+    this.isCustom = false,
+  });
+}