From 9ee82975e8c6f500940ab489f09a1c297be93d42 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Tue, 20 May 2025 15:40:30 +0800
Subject: [PATCH 01/12] Handle invalid appdata file.

---
 lib/foundation/appdata.dart | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/lib/foundation/appdata.dart b/lib/foundation/appdata.dart
index 9c1f210..822312f 100644
--- a/lib/foundation/appdata.dart
+++ b/lib/foundation/appdata.dart
@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'package:flutter/foundation.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:venera/foundation/app.dart';
+import 'package:venera/foundation/log.dart';
 import 'package:venera/utils/data_sync.dart';
 import 'package:venera/utils/init.dart';
 import 'package:venera/utils/io.dart';
@@ -110,21 +111,31 @@ class Appdata with Init {
     if (!await file.exists()) {
       return;
     }
-    var json = jsonDecode(await file.readAsString());
-    for (var key in (json['settings'] as Map<String, dynamic>).keys) {
-      if (json['settings'][key] != null) {
-        settings[key] = json['settings'][key];
+    try {
+      var json = jsonDecode(await file.readAsString());
+      for (var key in (json['settings'] as Map<String, dynamic>).keys) {
+        if (json['settings'][key] != null) {
+          settings[key] = json['settings'][key];
+        }
       }
+      searchHistory = List.from(json['searchHistory']);
     }
-    searchHistory = List.from(json['searchHistory']);
-    var implicitDataFile = File(FilePath.join(dataPath, 'implicitData.json'));
-    if (await implicitDataFile.exists()) {
-      try {
+    catch(e) {
+      Log.error("Appdata", "Failed to load appdata", e);
+      Log.info("Appdata", "Resetting appdata");
+      file.deleteIgnoreError();
+    }
+    try {
+      var implicitDataFile = File(FilePath.join(dataPath, 'implicitData.json'));
+      if (await implicitDataFile.exists()) {
         implicitData = jsonDecode(await implicitDataFile.readAsString());
       }
-      catch(_) {
-        // ignore
-      }
+    }
+    catch (e) {
+      Log.error("Appdata", "Failed to load implicit data", e);
+      Log.info("Appdata", "Resetting implicit data");
+      var implicitDataFile = File(FilePath.join(dataPath, 'implicitData.json'));
+      implicitDataFile.deleteIgnoreError();
     }
   }
 }

From 88f093f7e50ef31f14922dac0a86665356cf2d21 Mon Sep 17 00:00:00 2001
From: nyne <nyne19710@proton.me>
Date: Thu, 22 May 2025 19:59:42 +0800
Subject: [PATCH 02/12] Add clear unfavorited history functionality. Close #372

---
 assets/translation.json     |  8 +++++---
 lib/foundation/history.dart | 17 +++++++++++++++++
 lib/pages/history_page.dart |  7 +++++++
 3 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/assets/translation.json b/assets/translation.json
index be1e7b4..9bb2ea3 100644
--- a/assets/translation.json
+++ b/assets/translation.json
@@ -391,7 +391,8 @@
     "Click to select an image": "点击选择一张图片",
     "Source URL": "源地址",
     "The URL should point to a 'index.json' file": "该URL应指向一个'index.json'文件",
-    "Double tap to zoom": "双击缩放"
+    "Double tap to zoom": "双击缩放",
+    "Clear Unfavorited": "清除未收藏"
   },
   "zh_TW": {
     "Home": "首頁",
@@ -785,6 +786,7 @@
     "Click to select an image": "點擊選擇一張圖片",
     "Source URL": "源地址",
     "The URL should point to a 'index.json' file": "該URL應指向一個'index.json'文件",
-    "Double tap to zoom": "雙擊縮放"
+    "Double tap to zoom": "雙擊縮放",
+    "Clear Unfavorited": "清除未收藏"
   }
-}
+}
\ No newline at end of file
diff --git a/lib/foundation/history.dart b/lib/foundation/history.dart
index 0c017cf..3c45c89 100644
--- a/lib/foundation/history.dart
+++ b/lib/foundation/history.dart
@@ -10,6 +10,7 @@ import 'package:flutter/widgets.dart' show ChangeNotifier;
 import 'package:sqlite3/sqlite3.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/comic_type.dart';
+import 'package:venera/foundation/favorites.dart';
 import 'package:venera/foundation/image_provider/image_favorites_provider.dart';
 import 'package:venera/foundation/log.dart';
 import 'package:venera/utils/ext.dart';
@@ -305,6 +306,22 @@ class HistoryManager with ChangeNotifier {
     notifyListeners();
   }
 
+  void clearUnfavoritedHistory() {
+    final idAndTypes = _db.select("""
+      select id, type from history;
+    """);
+    for (var element in idAndTypes) {
+      final id = element["id"] as String;
+      final type = ComicType(element["type"] as int);
+      if (!LocalFavoritesManager().isExist(id, type)) {
+        _db.execute("""
+          delete from history
+          where id == ? and type == ?;
+        """, [id, type.value]);
+      }
+    }
+  }
+
   void remove(String id, ComicType type) async {
     _db.execute("""
       delete from history
diff --git a/lib/pages/history_page.dart b/lib/pages/history_page.dart
index 049021e..9a631cf 100644
--- a/lib/pages/history_page.dart
+++ b/lib/pages/history_page.dart
@@ -140,6 +140,13 @@ class _HistoryPageState extends State<HistoryPage> {
               title: 'Clear History'.tl,
               content: Text('Are you sure you want to clear your history?'.tl),
               actions: [
+                Button.outlined(
+                  onPressed: () {
+                    HistoryManager().clearUnfavoritedHistory();
+                    context.pop();
+                  },
+                  child: Text('Clear Unfavorited'.tl),
+                ),
                 Button.filled(
                   color: context.colorScheme.error,
                   onPressed: () {

From 7dc6be622aaec2a1f1435737d6879757b53874f1 Mon Sep 17 00:00:00 2001
From: nyne <nyne19710@proton.me>
Date: Thu, 22 May 2025 20:01:07 +0800
Subject: [PATCH 03/12] fix clearing history.

---
 lib/foundation/history.dart | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/foundation/history.dart b/lib/foundation/history.dart
index 3c45c89..412e0f5 100644
--- a/lib/foundation/history.dart
+++ b/lib/foundation/history.dart
@@ -320,6 +320,8 @@ class HistoryManager with ChangeNotifier {
         """, [id, type.value]);
       }
     }
+    updateCache();
+    notifyListeners();
   }
 
   void remove(String id, ComicType type) async {

From ded0068ea6b457ff9a18b8fe061923fdbc7ae87c Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Thu, 22 May 2025 20:37:25 +0800
Subject: [PATCH 04/12] Improve performance for clearing history.

---
 lib/foundation/history.dart | 13 ++++++++++---
 lib/pages/history_page.dart |  1 +
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/lib/foundation/history.dart b/lib/foundation/history.dart
index 412e0f5..3a1ae65 100644
--- a/lib/foundation/history.dart
+++ b/lib/foundation/history.dart
@@ -306,7 +306,9 @@ class HistoryManager with ChangeNotifier {
     notifyListeners();
   }
 
-  void clearUnfavoritedHistory() {
+void clearUnfavoritedHistory() {
+  _db.execute('BEGIN TRANSACTION;');
+  try {
     final idAndTypes = _db.select("""
       select id, type from history;
     """);
@@ -320,9 +322,14 @@ class HistoryManager with ChangeNotifier {
         """, [id, type.value]);
       }
     }
-    updateCache();
-    notifyListeners();
+    _db.execute('COMMIT;');
+  } catch (e) {
+    _db.execute('ROLLBACK;');
+    rethrow;
   }
+  updateCache();
+  notifyListeners();
+}
 
   void remove(String id, ComicType type) async {
     _db.execute("""
diff --git a/lib/pages/history_page.dart b/lib/pages/history_page.dart
index 9a631cf..bd65ce7 100644
--- a/lib/pages/history_page.dart
+++ b/lib/pages/history_page.dart
@@ -147,6 +147,7 @@ class _HistoryPageState extends State<HistoryPage> {
                   },
                   child: Text('Clear Unfavorited'.tl),
                 ),
+                const SizedBox(width: 4),
                 Button.filled(
                   color: context.colorScheme.error,
                   onPressed: () {

From ed70fdba934c01fbce76cba0d37320356bc7ef32 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Thu, 22 May 2025 20:51:47 +0800
Subject: [PATCH 05/12] Improve reordering local comics. Close #374

---
 assets/translation.json                       |  6 ++-
 lib/foundation/appdata.dart                   |  4 +-
 lib/foundation/favorites.dart                 | 23 +++++++--
 lib/pages/favorites/local_favorites_page.dart | 49 +++++++++++--------
 pubspec.lock                                  | 20 ++++----
 5 files changed, 64 insertions(+), 38 deletions(-)

diff --git a/assets/translation.json b/assets/translation.json
index 9bb2ea3..9de20d2 100644
--- a/assets/translation.json
+++ b/assets/translation.json
@@ -392,7 +392,8 @@
     "Source URL": "源地址",
     "The URL should point to a 'index.json' file": "该URL应指向一个'index.json'文件",
     "Double tap to zoom": "双击缩放",
-    "Clear Unfavorited": "清除未收藏"
+    "Clear Unfavorited": "清除未收藏",
+    "Reverse": "反转"
   },
   "zh_TW": {
     "Home": "首頁",
@@ -787,6 +788,7 @@
     "Source URL": "源地址",
     "The URL should point to a 'index.json' file": "該URL應指向一個'index.json'文件",
     "Double tap to zoom": "雙擊縮放",
-    "Clear Unfavorited": "清除未收藏"
+    "Clear Unfavorited": "清除未收藏",
+    "Reverse": "反轉"
   }
 }
\ No newline at end of file
diff --git a/lib/foundation/appdata.dart b/lib/foundation/appdata.dart
index 822312f..5600664 100644
--- a/lib/foundation/appdata.dart
+++ b/lib/foundation/appdata.dart
@@ -205,7 +205,9 @@ class Settings with ChangeNotifier {
 
   operator []=(String key, dynamic value) {
     _data[key] = value;
-    notifyListeners();
+    if (key != "dataVersion") {
+      notifyListeners();
+    }
   }
 
   @override
diff --git a/lib/foundation/favorites.dart b/lib/foundation/favorites.dart
index 2fce8f5..5e453f0 100644
--- a/lib/foundation/favorites.dart
+++ b/lib/foundation/favorites.dart
@@ -714,11 +714,26 @@ class LocalFavoritesManager with ChangeNotifier {
     if (!existsFolder(folder)) {
       throw Exception("Failed to reorder: folder not found");
     }
-    deleteFolder(folder);
-    createFolder(folder);
-    for (int i = 0; i < newFolder.length; i++) {
-      addComic(folder, newFolder[i], i);
+    _db.execute("BEGIN TRANSACTION");
+    try {
+      for (int i = 0; i < newFolder.length; i++) {
+        _db.execute("""
+          update "$folder"
+          set display_order = ?
+          where id == ? and type == ?;
+        """, [
+          i,
+          newFolder[i].id,
+          newFolder[i].type.value
+        ]);
+      }
     }
+    catch (e) {
+      Log.error("Reorder", e.toString());
+      _db.execute("ROLLBACK");
+      return;
+    }
+    _db.execute("COMMIT");
     notifyListeners();
   }
 
diff --git a/lib/pages/favorites/local_favorites_page.dart b/lib/pages/favorites/local_favorites_page.dart
index 7dfe925..fc45c0f 100644
--- a/lib/pages/favorites/local_favorites_page.dart
+++ b/lib/pages/favorites/local_favorites_page.dart
@@ -864,7 +864,10 @@ class _ReorderComicsPageState extends State<_ReorderComicsPage> {
   @override
   void dispose() {
     if (changed) {
-      LocalFavoritesManager().reorder(comics, widget.name);
+      // Delay to ensure navigation is completed
+      Future.delayed(const Duration(milliseconds: 200), () {
+        LocalFavoritesManager().reorder(comics, widget.name);
+      });
     }
     super.dispose();
   }
@@ -899,27 +902,31 @@ class _ReorderComicsPageState extends State<_ReorderComicsPage> {
       appBar: Appbar(
         title: Text("Reorder".tl),
         actions: [
-          IconButton(
-            icon: const Icon(Icons.info_outline),
-            onPressed: () {
-              showInfoDialog(
-                context: context,
-                title: "Reorder".tl,
-                content: "Long press and drag to reorder.".tl,
-              );
-            },
-          ),
-          IconButton(
-            icon: const Icon(Icons.swap_vert),
-            onPressed: () {
-              setState(() {
-                comics = comics.reversed.toList();
-                changed = true;
-                showToast(
-                    message: "Reversed successfully".tl, context: context);
-              });
-            },
+          Tooltip(
+            message: "Information".tl,
+            child: IconButton(
+              icon: const Icon(Icons.info_outline),
+              onPressed: () {
+                showInfoDialog(
+                  context: context,
+                  title: "Reorder".tl,
+                  content: "Long press and drag to reorder.".tl,
+                );
+              },
+            ),
           ),
+          Tooltip(
+            message: "Reverse".tl,
+            child: IconButton(
+              icon: const Icon(Icons.swap_vert),
+              onPressed: () {
+                setState(() {
+                  comics = comics.reversed.toList();
+                  changed = true;
+                });
+              },
+            ),
+          )
         ],
       ),
       body: ReorderableBuilder<FavoriteItem>(
diff --git a/pubspec.lock b/pubspec.lock
index 1d4a5da..5deaedf 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -45,10 +45,10 @@ packages:
     dependency: transitive
     description:
       name: async
-      sha256: d2872f9c19731c2e5f10444b14686eb7cc85c76274bd6c16e1816bff9a3bab63
+      sha256: "758e6d74e971c3e5aceb4110bfd6698efc7f501675bcfe0c775459a8140750eb"
       url: "https://pub.dev"
     source: hosted
-    version: "2.12.0"
+    version: "2.13.0"
   battery_plus:
     dependency: "direct main"
     description:
@@ -190,10 +190,10 @@ packages:
     dependency: transitive
     description:
       name: fake_async
-      sha256: "6a95e56b2449df2273fd8c45a662d6947ce1ebb7aafe80e550a3f68297f3cacc"
+      sha256: "5368f224a74523e8d2e7399ea1638b37aecfca824a3cc4dfdf77bf1fa905ac44"
       url: "https://pub.dev"
     source: hosted
-    version: "1.3.2"
+    version: "1.3.3"
   ffi:
     dependency: transitive
     description:
@@ -524,10 +524,10 @@ packages:
     dependency: "direct main"
     description:
       name: intl
-      sha256: d6f56758b7d3014a48af9701c085700aac781a92a87a62b1333b46d8879661cf
+      sha256: "3df61194eb431efc39c4ceba583b95633a403f46c9fd341e550ce0bfa50e9aa5"
       url: "https://pub.dev"
     source: hosted
-    version: "0.19.0"
+    version: "0.20.2"
   io:
     dependency: transitive
     description:
@@ -548,10 +548,10 @@ packages:
     dependency: transitive
     description:
       name: leak_tracker
-      sha256: c35baad643ba394b40aac41080300150a4f08fd0fd6a10378f8f7c6bc161acec
+      sha256: "6bb818ecbdffe216e81182c2f0714a2e62b593f4a4f13098713ff1685dfb6ab0"
       url: "https://pub.dev"
     source: hosted
-    version: "10.0.8"
+    version: "10.0.9"
   leak_tracker_flutter_testing:
     dependency: transitive
     description:
@@ -1037,10 +1037,10 @@ packages:
     dependency: transitive
     description:
       name: vm_service
-      sha256: "0968250880a6c5fe7edc067ed0a13d4bae1577fe2771dcf3010d52c4a9d3ca14"
+      sha256: ddfa8d30d89985b96407efce8acbdd124701f96741f2d981ca860662f1c0dc02
       url: "https://pub.dev"
     source: hosted
-    version: "14.3.1"
+    version: "15.0.0"
   web:
     dependency: transitive
     description:

From dcd646654767034af40ac7bb779d6007fabe048d Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Sat, 24 May 2025 16:24:53 +0800
Subject: [PATCH 06/12] Improve performance of deleting favorites, coping
 favorites, moving favorites and deleting downloads. Close #365

---
 lib/foundation/comic_source/models.dart       |  20 +++
 lib/foundation/favorites.dart                 | 150 +++++++++++++++++-
 lib/foundation/history.dart                   |  19 +++
 lib/foundation/local.dart                     |  54 +++++++
 lib/pages/favorites/local_favorites_page.dart |  53 +++----
 lib/pages/favorites/side_bar.dart             |   2 +
 lib/pages/local_comics_page.dart              |  10 +-
 7 files changed, 266 insertions(+), 42 deletions(-)

diff --git a/lib/foundation/comic_source/models.dart b/lib/foundation/comic_source/models.dart
index 5e2bc62..52cf276 100644
--- a/lib/foundation/comic_source/models.dart
+++ b/lib/foundation/comic_source/models.dart
@@ -116,6 +116,26 @@ class Comic {
   toString() => "$sourceKey@$id";
 }
 
+class ComicID {
+  final ComicType type;
+
+  final String id;
+
+  const ComicID(this.type, this.id);
+
+  @override
+  bool operator ==(Object other) {
+    if (other is! ComicID) return false;
+    return other.type == type && other.id == id;
+  }
+
+  @override
+  int get hashCode => type.hashCode ^ id.hashCode;
+
+  @override
+  String toString() => "$type@$id";
+}
+
 class ComicDetails with HistoryMixin {
   @override
   final String title;
diff --git a/lib/foundation/favorites.dart b/lib/foundation/favorites.dart
index 5e453f0..15b9e08 100644
--- a/lib/foundation/favorites.dart
+++ b/lib/foundation/favorites.dart
@@ -653,6 +653,102 @@ class LocalFavoritesManager with ChangeNotifier {
     notifyListeners();
   }
 
+  void batchMoveFavorites(
+      String sourceFolder, String targetFolder, List<FavoriteItem> items) {
+    _modifiedAfterLastCache = true;
+
+    if (!existsFolder(sourceFolder)) {
+      throw Exception("Source folder does not exist");
+    }
+    if (!existsFolder(targetFolder)) {
+      throw Exception("Target folder does not exist");
+    }
+
+    _db.execute("BEGIN TRANSACTION");
+    var displayOrder = maxValue(targetFolder) + 1;
+    try {
+      for (var item in items) {
+        _db.execute("""
+          insert or ignore into "$targetFolder" (id, name, author, type, tags, cover_path, time, display_order)
+          select id, name, author, type, tags, cover_path, time, ?
+          from "$sourceFolder"
+          where id == ? and type == ?;
+        """, [displayOrder, item.id, item.type.value]);
+
+        _db.execute("""
+          delete from "$sourceFolder"
+          where id == ? and type == ?;
+        """, [item.id, item.type.value]);
+
+        displayOrder++;
+      }
+      notifyListeners();
+    } catch (e) {
+      Log.error("Batch Move Favorites", e.toString());
+      _db.execute("ROLLBACK");
+      return;
+    }
+    _db.execute("COMMIT");
+
+    // Update counts
+    if (counts[targetFolder] == null) {
+      counts[targetFolder] = count(targetFolder);
+    } else {
+      counts[targetFolder] = counts[targetFolder]! + items.length;
+    }
+
+    if (counts[sourceFolder] != null) {
+      counts[sourceFolder] = counts[sourceFolder]! - items.length;
+    } else {
+      counts[sourceFolder] = count(sourceFolder);
+    }
+
+    notifyListeners();
+  }
+
+  void batchCopyFavorites(
+      String sourceFolder, String targetFolder, List<FavoriteItem> items) {
+    _modifiedAfterLastCache = true;
+
+    if (!existsFolder(sourceFolder)) {
+      throw Exception("Source folder does not exist");
+    }
+    if (!existsFolder(targetFolder)) {
+      throw Exception("Target folder does not exist");
+    }
+
+    _db.execute("BEGIN TRANSACTION");
+    var displayOrder = maxValue(targetFolder) + 1;
+    try {
+      for (var item in items) {
+        _db.execute("""
+          insert or ignore into "$targetFolder" (id, name, author, type, tags, cover_path, time, display_order)
+          select id, name, author, type, tags, cover_path, time, ?
+          from "$sourceFolder"
+          where id == ? and type == ?;
+        """, [displayOrder, item.id, item.type.value]);
+
+        displayOrder++;
+      }
+      notifyListeners();
+    } catch (e) {
+      Log.error("Batch Copy Favorites", e.toString());
+      _db.execute("ROLLBACK");
+      return;
+    }
+
+    _db.execute("COMMIT");
+
+    // Update counts
+    if (counts[targetFolder] == null) {
+      counts[targetFolder] = count(targetFolder);
+    } else {
+      counts[targetFolder] = counts[targetFolder]! + items.length;
+    }
+
+    notifyListeners();
+  }
+
   /// delete a folder
   void deleteFolder(String name) {
     _modifiedAfterLastCache = true;
@@ -667,11 +763,6 @@ class LocalFavoritesManager with ChangeNotifier {
     notifyListeners();
   }
 
-  void deleteComic(String folder, FavoriteItem comic) {
-    _modifiedAfterLastCache = true;
-    deleteComicWithId(folder, comic.id, comic.type);
-  }
-
   void deleteComicWithId(String folder, String id, ComicType type) {
     _modifiedAfterLastCache = true;
     LocalFavoriteImageProvider.delete(id, type.value);
@@ -687,6 +778,55 @@ class LocalFavoritesManager with ChangeNotifier {
     notifyListeners();
   }
 
+  void batchDeleteComics(String folder, List<FavoriteItem> comics) {
+    _modifiedAfterLastCache = true;
+    _db.execute("BEGIN TRANSACTION");
+    try {
+      for (var comic in comics) {
+        LocalFavoriteImageProvider.delete(comic.id, comic.type.value);
+        _db.execute("""
+          delete from "$folder"
+          where id == ? and type == ?;
+        """, [comic.id, comic.type.value]);
+      }
+      if (counts[folder] != null) {
+        counts[folder] = counts[folder]! - comics.length;
+      } else {
+        counts[folder] = count(folder);
+      }
+    } catch (e) {
+      Log.error("Batch Delete Comics", e.toString());
+      _db.execute("ROLLBACK");
+      return;
+    }
+    _db.execute("COMMIT");
+    notifyListeners();
+  }
+
+  void batchDeleteComicsInAllFolders(List<ComicID> comics) {
+    _modifiedAfterLastCache = true;
+    _db.execute("BEGIN TRANSACTION");
+    var folderNames = _getFolderNamesWithDB();
+    try {
+      for (var comic in comics) {
+        LocalFavoriteImageProvider.delete(comic.id, comic.type.value);
+        for (var folder in folderNames) {
+          _db.execute("""
+            delete from "$folder"
+            where id == ? and type == ?;
+          """, [comic.id, comic.type.value]);
+        }
+      }
+    } catch (e) {
+      Log.error("Batch Delete Comics in All Folders", e.toString());
+      _db.execute("ROLLBACK");
+      return;
+    }
+    initCounts();
+    _db.execute("COMMIT");
+    notifyListeners();
+  }
+
   Future<int> removeInvalid() async {
     int count = 0;
     await Future.microtask(() {
diff --git a/lib/foundation/history.dart b/lib/foundation/history.dart
index 3a1ae65..4ea0892 100644
--- a/lib/foundation/history.dart
+++ b/lib/foundation/history.dart
@@ -406,4 +406,23 @@ void clearUnfavoritedHistory() {
     isInitialized = false;
     _db.dispose();
   }
+
+  void batchDeleteHistories(List<ComicID> histories) {
+    if (histories.isEmpty) return;
+    _db.execute('BEGIN TRANSACTION;');
+    try {
+      for (var history in histories) {
+        _db.execute("""
+          delete from history
+          where id == ? and type == ?;
+        """, [history.id, history.type.value]);
+      }
+      _db.execute('COMMIT;');
+    } catch (e) {
+      _db.execute('ROLLBACK;');
+      rethrow;
+    }
+    updateCache();
+    notifyListeners();
+  }
 }
diff --git a/lib/foundation/local.dart b/lib/foundation/local.dart
index b52524f..206e8fb 100644
--- a/lib/foundation/local.dart
+++ b/lib/foundation/local.dart
@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'dart:isolate';
 
 import 'package:flutter/widgets.dart' show ChangeNotifier;
 import 'package:path_provider/path_provider.dart';
@@ -546,6 +547,59 @@ class LocalManager with ChangeNotifier {
     remove(c.id, c.comicType);
     notifyListeners();
   }
+
+  void batchDeleteComics(List<LocalComic> comics, [bool removeFileOnDisk = true]) {
+    if (comics.isEmpty) {
+      return;
+    }
+
+    var shouldRemovedDirs = <Directory>[];
+    _db.execute('BEGIN TRANSACTION;');
+    try {
+      for (var c in comics) {
+        if (removeFileOnDisk) {
+          var dir = Directory(FilePath.join(path, c.directory));
+          if (dir.existsSync()) {
+            shouldRemovedDirs.add(dir);
+          }
+        }
+        _db.execute(
+          'DELETE FROM comics WHERE id = ? AND comic_type = ?;',
+          [c.id, c.comicType.value],
+        );
+      }
+    }
+    catch(e, s) {
+      Log.error("LocalManager", "Failed to batch delete comics: $e", s);
+      _db.execute('ROLLBACK;');
+      return;
+    }
+    _db.execute('COMMIT;');
+
+    var comicIDs = comics.map((e) => ComicID(e.comicType, e.id)).toList();
+    LocalFavoritesManager().batchDeleteComicsInAllFolders(comicIDs);
+    HistoryManager().batchDeleteHistories(comicIDs);
+
+    notifyListeners();
+
+    if (removeFileOnDisk) {
+      _deleteDirectories(shouldRemovedDirs);
+    }
+  }
+
+  static void _deleteDirectories(List<Directory> directories) {
+    Isolate.run(() async {
+      for (var dir in directories) {
+        try {
+          if (dir.existsSync()) {
+            await dir.delete(recursive: true);
+          }
+        } catch (e) {
+          continue;
+        }
+      }
+    });
+  }
 }
 
 enum LocalSortType {
diff --git a/lib/pages/favorites/local_favorites_page.dart b/lib/pages/favorites/local_favorites_page.dart
index fc45c0f..602f639 100644
--- a/lib/pages/favorites/local_favorites_page.dart
+++ b/lib/pages/favorites/local_favorites_page.dart
@@ -416,10 +416,12 @@ class _LocalFavoritesPageState extends State<_LocalFavoritesPage> {
                 "Selected @c comics".tlParams({"c": selectedComics.length})),
             actions: [
               MenuButton(entries: [
+                if (!isAllFolder)
                 MenuEntry(
                     icon: Icons.drive_file_move,
                     text: "Move to folder".tl,
                     onClick: () => favoriteOption('move')),
+                if (!isAllFolder)
                 MenuEntry(
                     icon: Icons.copy,
                     text: "Copy to folder".tl,
@@ -756,32 +758,26 @@ class _LocalFavoritesPageState extends State<_LocalFavoritesPage> {
                             return;
                           }
                           if (option == 'move') {
-                            for (var c in selectedComics.keys) {
-                              for (var s in selectedLocalFolders) {
-                                LocalFavoritesManager().moveFavorite(
-                                    favPage.folder as String,
-                                    s,
-                                    c.id,
-                                    (c as FavoriteItem).type);
-                              }
+                            var comics = selectedComics.keys
+                                .map((e) => e as FavoriteItem)
+                                .toList();
+                            for (var f in selectedLocalFolders) {
+                              LocalFavoritesManager().batchMoveFavorites(
+                                favPage.folder as String,
+                                f,
+                                comics,
+                              );
                             }
                           } else {
-                            for (var c in selectedComics.keys) {
-                              for (var s in selectedLocalFolders) {
-                                LocalFavoritesManager().addComic(
-                                  s,
-                                  FavoriteItem(
-                                    id: c.id,
-                                    name: c.title,
-                                    coverPath: c.cover,
-                                    author: c.subtitle ?? '',
-                                    type: ComicType((c.sourceKey == 'local'
-                                        ? 0
-                                        : c.sourceKey.hashCode)),
-                                    tags: c.tags ?? [],
-                                  ),
-                                );
-                              }
+                            var comics = selectedComics.keys
+                                .map((e) => e as FavoriteItem)
+                                .toList();
+                            for (var f in selectedLocalFolders) {
+                              LocalFavoritesManager().batchCopyFavorites(
+                                favPage.folder as String,
+                                f,
+                                comics,
+                              );
                             }
                           }
                           App.rootContext.pop();
@@ -817,13 +813,8 @@ class _LocalFavoritesPageState extends State<_LocalFavoritesPage> {
   }
 
   void _deleteComicWithId() {
-    for (var c in selectedComics.keys) {
-      LocalFavoritesManager().deleteComicWithId(
-        widget.folder,
-        c.id,
-        (c as FavoriteItem).type,
-      );
-    }
+    var toBeDeleted = selectedComics.keys.map((e) => e as FavoriteItem).toList();
+    LocalFavoritesManager().batchDeleteComics(widget.folder, toBeDeleted);
     _cancel();
   }
 }
diff --git a/lib/pages/favorites/side_bar.dart b/lib/pages/favorites/side_bar.dart
index 464ad75..1125b0a 100644
--- a/lib/pages/favorites/side_bar.dart
+++ b/lib/pages/favorites/side_bar.dart
@@ -42,6 +42,7 @@ class _LeftBarState extends State<_LeftBar> implements FolderList {
     folders = LocalFavoritesManager().folderNames;
     findNetworkFolders();
     appdata.settings.addListener(updateFolders);
+    LocalFavoritesManager().addListener(updateFolders);
     super.initState();
   }
 
@@ -49,6 +50,7 @@ class _LeftBarState extends State<_LeftBar> implements FolderList {
   void dispose() {
     super.dispose();
     appdata.settings.removeListener(updateFolders);
+    LocalFavoritesManager().removeListener(updateFolders);
   }
 
   @override
diff --git a/lib/pages/local_comics_page.dart b/lib/pages/local_comics_page.dart
index 22b4dd9..c958fee 100644
--- a/lib/pages/local_comics_page.dart
+++ b/lib/pages/local_comics_page.dart
@@ -377,12 +377,10 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
               FilledButton(
                 onPressed: () {
                   context.pop();
-                  for (var comic in comics) {
-                    LocalManager().deleteComic(
-                      comic,
-                      removeComicFile,
-                    );
-                  }
+                  LocalManager().batchDeleteComics(
+                    comics,
+                    removeComicFile,
+                  );
                   isDeleted = true;
                 },
                 child: Text("Confirm".tl),

From 76e9ef87d4c9c075534a6e01f74b45cfb492caf7 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Sun, 25 May 2025 20:26:35 +0800
Subject: [PATCH 07/12] Add functionality to delete specific comic chapters.
 Close #368

---
 assets/translation.json          |  6 ++-
 lib/foundation/local.dart        | 36 ++++++++++++++++++
 lib/pages/local_comics_page.dart | 64 ++++++++++++++++++++++++++++++++
 3 files changed, 104 insertions(+), 2 deletions(-)

diff --git a/assets/translation.json b/assets/translation.json
index 9de20d2..45079e2 100644
--- a/assets/translation.json
+++ b/assets/translation.json
@@ -393,7 +393,8 @@
     "The URL should point to a 'index.json' file": "该URL应指向一个'index.json'文件",
     "Double tap to zoom": "双击缩放",
     "Clear Unfavorited": "清除未收藏",
-    "Reverse": "反转"
+    "Reverse": "反转",
+    "Delete Chapters": "删除章节"
   },
   "zh_TW": {
     "Home": "首頁",
@@ -789,6 +790,7 @@
     "The URL should point to a 'index.json' file": "該URL應指向一個'index.json'文件",
     "Double tap to zoom": "雙擊縮放",
     "Clear Unfavorited": "清除未收藏",
-    "Reverse": "反轉"
+    "Reverse": "反轉",
+    "Delete Chapters": "刪除章節"
   }
 }
\ No newline at end of file
diff --git a/lib/foundation/local.dart b/lib/foundation/local.dart
index 206e8fb..ef7cf15 100644
--- a/lib/foundation/local.dart
+++ b/lib/foundation/local.dart
@@ -548,6 +548,41 @@ class LocalManager with ChangeNotifier {
     notifyListeners();
   }
 
+  void deleteComicChapters(LocalComic c, List<String> chapters) {
+    if (chapters.isEmpty) {
+      return;
+    }
+    var newDownloadedChapters = c.downloadedChapters
+        .where((e) => !chapters.contains(e))
+        .toList();
+    if (newDownloadedChapters.isNotEmpty) {
+      _db.execute(
+        'UPDATE comics SET downloadedChapters = ? WHERE id = ? AND comic_type = ?;',
+        [
+          jsonEncode(newDownloadedChapters),
+          c.id,
+          c.comicType.value,
+        ],
+      );
+    } else {
+      _db.execute(
+        'DELETE FROM comics WHERE id = ? AND comic_type = ?;',
+        [c.id, c.comicType.value],
+      );
+    }
+    var shouldRemovedDirs = <Directory>[];
+    for (var chapter in chapters) {
+      var dir = Directory(FilePath.join(c.baseDir, chapter));
+      if (dir.existsSync()) {
+        shouldRemovedDirs.add(dir);
+      }
+    }
+    if (shouldRemovedDirs.isNotEmpty) {
+      _deleteDirectories(shouldRemovedDirs);
+    }
+    notifyListeners();
+  }
+
   void batchDeleteComics(List<LocalComic> comics, [bool removeFileOnDisk = true]) {
     if (comics.isEmpty) {
       return;
@@ -587,6 +622,7 @@ class LocalManager with ChangeNotifier {
     }
   }
 
+  /// Deletes the directories in a separate isolate to avoid blocking the UI thread.
   static void _deleteDirectories(List<Directory> directories) {
     Isolate.run(() async {
       for (var dir in directories) {
diff --git a/lib/pages/local_comics_page.dart b/lib/pages/local_comics_page.dart
index c958fee..6904054 100644
--- a/lib/pages/local_comics_page.dart
+++ b/lib/pages/local_comics_page.dart
@@ -374,6 +374,14 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
               },
             ),
             actions: [
+              if (comics.length == 1 && comics.first.hasChapters)
+                TextButton(
+                  child: Text("Delete Chapters".tl),
+                  onPressed: () {
+                    context.pop();
+                    showDeleteChaptersPopWindow(context, comics.first);
+                  },
+                ),
               FilledButton(
                 onPressed: () {
                   context.pop();
@@ -495,3 +503,59 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
 
 typedef ExportComicFunc = Future<File> Function(
     LocalComic comic, String outFilePath);
+
+void showDeleteChaptersPopWindow(BuildContext context, LocalComic comic) {
+  var chapters = <String>[];
+
+  showPopUpWidget(
+    context,
+    PopUpWidgetScaffold(
+      title: "Delete Chapters".tl,
+      body: StatefulBuilder(builder: (context, setState) {
+        return Column(
+          children: [
+            Expanded(
+              child: ListView.builder(
+                itemCount: comic.downloadedChapters.length,
+                itemBuilder: (context, index) {
+                  var id = comic.downloadedChapters[index];
+                  var chapter = comic.chapters![id] ?? "Unknown Chapter";
+                  return CheckboxListTile(
+                    title: Text(chapter),
+                    value: chapters.contains(id),
+                    onChanged: (v) {
+                      setState(() {
+                        if (v == true) {
+                          chapters.add(id);
+                        } else {
+                          chapters.remove(id);
+                        }
+                      });
+                    },
+                  );
+                },
+              ),
+            ),
+            Padding(
+              padding: const EdgeInsets.all(8.0),
+              child: Row(
+                mainAxisAlignment: MainAxisAlignment.end,
+                children: [
+                  FilledButton(
+                    onPressed: () {
+                      Future.delayed(const Duration(milliseconds: 200), () {
+                        LocalManager().deleteComicChapters(comic, chapters);
+                      });
+                      App.rootContext.pop();
+                    },
+                    child: Text("Submit".tl),
+                  )
+                ],
+              ),
+            )
+          ],
+        );
+      }),
+    ),
+  );
+}

From 749a1a47fbaf2c7c28904828dd5ac466d295de4e Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Sun, 25 May 2025 20:33:31 +0800
Subject: [PATCH 08/12] Fix dialog content overflow. Close #363

---
 lib/components/message.dart | 46 +++++++++++++++++++------------------
 1 file changed, 24 insertions(+), 22 deletions(-)

diff --git a/lib/components/message.dart b/lib/components/message.dart
index 1a67f61..9c27e24 100644
--- a/lib/components/message.dart
+++ b/lib/components/message.dart
@@ -290,28 +290,30 @@ class ContentDialog extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    var content = Column(
-      mainAxisSize: MainAxisSize.min,
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        title != null
-            ? Appbar(
-                leading: IconButton(
-                  icon: const Icon(Icons.close),
-                  onPressed: dismissible ? context.pop : null,
-                ),
-                title: Text(title!),
-                backgroundColor: Colors.transparent,
-              )
-            : const SizedBox.shrink(),
-        this.content,
-        const SizedBox(height: 16),
-        Row(
-          mainAxisAlignment: MainAxisAlignment.end,
-          children: actions,
-        ).paddingRight(12),
-        const SizedBox(height: 16),
-      ],
+    var content = SingleChildScrollView(
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          title != null
+              ? Appbar(
+            leading: IconButton(
+              icon: const Icon(Icons.close),
+              onPressed: dismissible ? context.pop : null,
+            ),
+            title: Text(title!),
+            backgroundColor: Colors.transparent,
+          )
+              : const SizedBox.shrink(),
+          this.content,
+          const SizedBox(height: 16),
+          Row(
+            mainAxisAlignment: MainAxisAlignment.end,
+            children: actions,
+          ).paddingRight(12),
+          const SizedBox(height: 16),
+        ],
+      ),
     );
     return Dialog(
       shape: RoundedRectangleBorder(

From 0c46214619e7bfb2737949e1f4db8946b4902c30 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Mon, 26 May 2025 15:35:24 +0800
Subject: [PATCH 09/12] Reduce maximum length for comic directory names to
 improve consistency. Close #362

---
 lib/foundation/local.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/foundation/local.dart b/lib/foundation/local.dart
index ef7cf15..812d6eb 100644
--- a/lib/foundation/local.dart
+++ b/lib/foundation/local.dart
@@ -462,7 +462,7 @@ class LocalManager with ChangeNotifier {
     if (comic != null) {
       return Directory(FilePath.join(path, comic.directory));
     }
-    const comicDirectoryMaxLength = 128;
+    const comicDirectoryMaxLength = 80;
     if (name.length > comicDirectoryMaxLength) {
       name = name.substring(0, comicDirectoryMaxLength);
     }

From 55733ef505c55f61b8ac3ae03639d0caa38b7b58 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Mon, 26 May 2025 16:09:23 +0800
Subject: [PATCH 10/12] Update selectAll method to handle search mode for
 selecting comics. Close #359

---
 lib/pages/favorites/local_favorites_page.dart | 27 +++++++++++++++----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/lib/pages/favorites/local_favorites_page.dart b/lib/pages/favorites/local_favorites_page.dart
index 602f639..12f258c 100644
--- a/lib/pages/favorites/local_favorites_page.dart
+++ b/lib/pages/favorites/local_favorites_page.dart
@@ -155,16 +155,33 @@ class _LocalFavoritesPageState extends State<_LocalFavoritesPage> {
 
   void selectAll() {
     setState(() {
-      selectedComics = comics.asMap().map((k, v) => MapEntry(v, true));
+      if (searchMode) {
+        selectedComics = searchResults.asMap().map((k, v) => MapEntry(v, true));
+      } else {
+        selectedComics = comics.asMap().map((k, v) => MapEntry(v, true));
+      }
     });
   }
 
   void invertSelection() {
     setState(() {
-      comics.asMap().forEach((k, v) {
-        selectedComics[v] = !selectedComics.putIfAbsent(v, () => false);
-      });
-      selectedComics.removeWhere((k, v) => !v);
+      if (searchMode) {
+        for (var c in searchResults) {
+          if (selectedComics.containsKey(c)) {
+            selectedComics.remove(c);
+          } else {
+            selectedComics[c] = true;
+          }
+        }
+      } else {
+        for (var c in comics) {
+          if (selectedComics.containsKey(c)) {
+            selectedComics.remove(c);
+          } else {
+            selectedComics[c] = true;
+          }
+        }
+      }
     });
   }
 

From 665f50ed2aef3ab38e7b7f6af80e7d3868ad50f5 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Mon, 26 May 2025 16:42:05 +0800
Subject: [PATCH 11/12] Fixed an issue where comic counts would become invalid
 after renaming a favorite folder. Close #357

---
 lib/foundation/favorites.dart | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/foundation/favorites.dart b/lib/foundation/favorites.dart
index 15b9e08..d198ec3 100644
--- a/lib/foundation/favorites.dart
+++ b/lib/foundation/favorites.dart
@@ -898,6 +898,8 @@ class LocalFavoritesManager with ChangeNotifier {
       set folder_name = ?
       where folder_name == ?;
     """, [after, before]);
+    counts[after] = counts[before] ?? 0;
+    counts.remove(before);
     notifyListeners();
   }
 

From 20a57c7a36d06d8468e3bcd8aff480bb44a24c42 Mon Sep 17 00:00:00 2001
From: nyne <me@nyne.dev>
Date: Mon, 26 May 2025 18:10:07 +0800
Subject: [PATCH 12/12] Update version code

---
 lib/foundation/app.dart | 2 +-
 pubspec.lock            | 4 ++--
 pubspec.yaml            | 6 +++---
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/foundation/app.dart b/lib/foundation/app.dart
index 1257778..13ed776 100644
--- a/lib/foundation/app.dart
+++ b/lib/foundation/app.dart
@@ -13,7 +13,7 @@ export "widget_utils.dart";
 export "context.dart";
 
 class _App {
-  final version = "1.4.3";
+  final version = "1.4.4";
 
   bool get isAndroid => Platform.isAndroid;
 
diff --git a/pubspec.lock b/pubspec.lock
index 5deaedf..e96ad55 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1107,5 +1107,5 @@ packages:
     source: hosted
     version: "0.0.12"
 sdks:
-  dart: ">=3.7.0 <4.0.0"
-  flutter: ">=3.29.3"
+  dart: ">=3.8.0 <4.0.0"
+  flutter: ">=3.32.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 8731d77..6fc8078 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -2,11 +2,11 @@ name: venera
 description: "A comic app."
 publish_to: 'none'
 
-version: 1.4.3+143
+version: 1.4.4+144
 
 environment:
-  sdk: '>=3.6.0 <4.0.0'
-  flutter: 3.29.3
+  sdk: '>=3.8.0 <4.0.0'
+  flutter: 3.32.0
 
 dependencies:
   flutter: