优化漫步界面

lib/utils/database_helper.dart

@@ -57,7 +57,7 @@ class DatabaseHelper {
 
     return await openDatabase(
       path,
-      version: 14,
+      version: 15,
       onCreate: _createDB,
       onUpgrade: _onUpgrade,
     );
@@ -118,6 +118,10 @@ class DatabaseHelper {
     if (oldVersion < 14) {
       await _createReaderBooksTable(db);
     }
+    if (oldVersion < 15) {
+      await db.execute('ALTER TABLE movies ADD COLUMN cover_offset REAL DEFAULT 0');
+      await db.execute('ALTER TABLE books ADD COLUMN cover_offset REAL DEFAULT 0');
+    }
   }
 
   /// 升级books表到V11（添加ISBN和出版时间字段）
@@ -501,7 +505,8 @@ class DatabaseHelper {
         watch_date TEXT,
         created_at TEXT NOT NULL,
         updated_at TEXT NOT NULL,
-        is_deleted INTEGER DEFAULT 0
+        is_deleted INTEGER DEFAULT 0,
+        cover_offset REAL DEFAULT 0
       )
     ''');
 
@@ -522,7 +527,8 @@ class DatabaseHelper {
         publish_date TEXT,
         created_at TEXT NOT NULL,
         updated_at TEXT NOT NULL,
-        is_deleted INTEGER DEFAULT 0
+        is_deleted INTEGER DEFAULT 0,
+        cover_offset REAL DEFAULT 0
       )
     ''');
 

lib/utils/user_prefs.dart

@@ -61,12 +61,6 @@ class UserPrefs {
   int get detailPageStyle => prefs.getInt('detailPageStyle') ?? 0;
   Future<bool> setDetailPageStyle(int value) => prefs.setInt('detailPageStyle', value);
 
-  // ========== 封面位置 ==========
-
-  /// 获取封面偏移量（-1.0 到 1.0，0 = 居中）
-  double getCoverOffset(String itemId) => prefs.getDouble('coverOffset_$itemId') ?? 0.0;
-  Future<bool> setCoverOffset(String itemId, double value) => prefs.setDouble('coverOffset_$itemId', value);
-
   // ========== 主界面显示设置 ==========
 
   /// 是否启用底部导航栏滚动隐藏（默认开启）