fix(following): 支持未登录追剧与历史

lib/core/data/services/watch_records_controller.dart

@@ -314,6 +314,23 @@ class WatchRecordsController extends ChangeNotifier {
     if (!_disposed) notifyListeners();
   }
 
+  /// 切换账号/设备身份时清除内存数据，不删除服务端记录。
+  void reset() {
+    _requestSeq += 1;
+    records = const [];
+    total = 0;
+    loading = false;
+    loadingMore = false;
+    hasMore = false;
+    clearing = false;
+    error = null;
+    loadMoreError = null;
+    actionError = null;
+    lastErrorCode = null;
+    _pageIndex = 0;
+    _notify();
+  }
+
   @override
   void dispose() {
     _disposed = true;