feat(ui): 重做三 Tab 首页与发现页

lib/pages/discover/discover_logic.dart

@@ -3,6 +3,7 @@
 import 'package:flutter/material.dart';
 
 import '../../core/data/models/drama.dart';
+import '../../core/data/models/watch_progress.dart';
 import '../../core/data/repositories/watch_history_repository.dart';
 import '../../l10n/app_localizations.dart';
 
@@ -16,6 +17,7 @@ class DiscoverLogic extends ChangeNotifier {
   final WatchHistoryRepository history;
   Drama drama;
   late Future<Duration?> position;
+  WatchProgress? resumeRecord;
   final TextEditingController search = TextEditingController();
   final FocusNode searchFocus = FocusNode();
   final ScrollController scroll = ScrollController();
@@ -32,10 +34,48 @@ class DiscoverLogic extends ChangeNotifier {
         .resumePointFor(drama.id)
         .then((point) => point?.position)
         .catchError((Object _) => null);
+    refreshResume();
+  }
+
+  Future<void> refreshResume() async {
+    try {
+      final recent = await history.recent(limit: 1);
+      if (recent.isEmpty || recent.first.finished) {
+        resumeRecord = null;
+      } else {
+        resumeRecord = recent.first;
+      }
+    } catch (_) {
+      resumeRecord = null;
+    }
+    notify();
   }
 
   void onSearchChanged() => notify();
 
+  List<Drama> filtered(List<Drama> dramas) {
+    final query = search.text.trim().toLowerCase();
+    if (query.isEmpty) return dramas;
+    return dramas.where((drama) {
+      final haystack = [
+        drama.title,
+        drama.genre,
+        drama.category,
+        drama.synopsis,
+      ].join(' ').toLowerCase();
+      return haystack.contains(query);
+    }).toList();
+  }
+
+  Drama? resumeDrama(List<Drama> dramas) {
+    final record = resumeRecord;
+    if (record == null) return null;
+    for (final drama in dramas) {
+      if (drama.id == record.dramaId) return drama;
+    }
+    return null;
+  }
+
   bool get showSearch => searchOpen || search.text.isNotEmpty;
 
   void openSearch() {