md阅读器+

README.md

@@ -119,6 +119,7 @@ flutter run
 **5. 图片文件存储路径：**
 
 - 数据库：`/mooknote/mooknote.db`
+- 
 - 图片：`/mooknote/images/类别（影视/图书/笔记）/类别下的条目id/图片文件名`
 
 **注意：**

android/app/src/main/AndroidManifest.xml

@@ -57,6 +57,7 @@
     <!-- 存储权限 -->
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
     <!-- Android 13+ 使用新的权限 -->
     <uses-permission android:name="android.permission.READ_MEDIA_IMAGES"/>
     <uses-permission android:name="android.permission.READ_MEDIA_VIDEO"/>

lib/pages/home_page.dart

@@ -36,9 +36,10 @@ class _HomePageState extends State<HomePage> {
         builder: (context, provider, child) {
           final currentPage = provider.bottomNavIndex == 0 ? 0 : 1;
           if (_pageController.hasClients && _pageController.page?.round() != currentPage) {
+            WidgetsBinding.instance.addPostFrameCallback((_) {
+              if (mounted) {
                 _isSwitchingPage = true;
                 _pageController.jumpToPage(currentPage);
-            // 切换完成后重置标记，确保导航栏显示
                 Future.delayed(const Duration(milliseconds: 300), () {
                   if (mounted) {
                     _isSwitchingPage = false;
@@ -46,6 +47,8 @@ class _HomePageState extends State<HomePage> {
                   }
                 });
               }
+            });
+          }
 
           return NotificationListener<ScrollNotification>(
             onNotification: (notification) {

lib/pages/markdown_reader/md_reader_tab_page.dart

@@ -1,9 +1,12 @@
 import 'dart:io';
 import 'package:flutter/material.dart';
+import 'package:file_picker/file_picker.dart';
 import 'package:path/path.dart' as p;
+import 'package:permission_handler/permission_handler.dart';
+import '../../utils/user_prefs.dart';
 import 'md_viewer_page.dart';
 
-/// Markdown 阅读器 Tab 页 - 文件浏览器
+/// Markdown 阅读器 - 文件浏览器
 class MdReaderTabPage extends StatefulWidget {
   const MdReaderTabPage({super.key});
 
@@ -12,342 +15,543 @@ class MdReaderTabPage extends StatefulWidget {
 }
 
 class _MdReaderTabPageState extends State<MdReaderTabPage> {
-  static const String _basePath = '/storage/emulated/0/Documents/mooknote/markdown';
+  String? _rootPath;
-  String _currentPath = _basePath;
+  String? _currentPath;
-  List<FileSystemEntity> _items = [];
+  List<_FileEntry> _entries = [];
-  bool _isLoading = true;
+  bool _isLoading = false;
   String? _error;
 
+  bool _showEmptyDirs = true;
+  bool _showImageOnlyDirs = true;
+
   @override
   void initState() {
     super.initState();
-    _loadDirectory();
+    _loadSettings();
+    _init();
   }
 
-  /// 加载当前目录内容
+  void _loadSettings() {
-  Future<void> _loadDirectory() async {
+    final prefs = UserPrefs();
-    setState(() {
+    _showEmptyDirs = prefs.showEmptyDirs;
-      _isLoading = true;
+    _showImageOnlyDirs = prefs.showImageOnlyDirs;
-      _error = null;
+  }
-    });
 
-    try {
+  Future<void> _init() async {
-      final dir = Directory(_currentPath);
+    final saved = UserPrefs().lastMdFolder;
-      if (!await dir.exists()) {
+    if (saved != null && saved.isNotEmpty) {
-        setState(() {
+      final dir = Directory(saved);
-          _error = '目录不存在\n请将 Markdown 文件放到：\n$_basePath';
+      if (await dir.exists()) {
-          _items = [];
+        _rootPath = saved;
-          _isLoading = false;
+        _currentPath = saved;
-        });
+        await _loadDirectory();
+        return;
+      }
+    }
+    if (mounted) setState(() {});
+  }
+
+  /// 请求存储权限（Android 11+ 需要 MANAGE_EXTERNAL_STORAGE）
+  Future<bool> _requestStoragePermission() async {
+    if (!Platform.isAndroid) return true;
+
+    var status = await Permission.manageExternalStorage.status;
+    if (status.isGranted) return true;
+
+    status = await Permission.manageExternalStorage.request();
+    if (status.isGranted) return true;
+
+    status = await Permission.storage.status;
+    if (status.isGranted) return true;
+
+    status = await Permission.storage.request();
+    return status.isGranted;
+  }
+
+  Future<void> _pickDirectory() async {
+    final hasPermission = await _requestStoragePermission();
+    if (!hasPermission) {
+      if (mounted) {
+        _showPermissionDeniedDialog();
+      }
       return;
     }
 
-      final entities = await dir.list().toList();
+    final result = await FilePicker.platform.getDirectoryPath();
-      // 排序：文件夹在前，文件在后，按名称排序
+    if (result == null) return;
-      entities.sort((a, b) {
-        final aIsDir = a is Directory;
-        final bIsDir = b is Directory;
-        if (aIsDir != bIsDir) {
-          return aIsDir ? -1 : 1;
-        }
-        return p.basename(a.path).toLowerCase().compareTo(
-              p.basename(b.path).toLowerCase());
-      });
 
-      setState(() {
+    UserPrefs().setLastMdFolder(result);
-        _items = entities;
+    _rootPath = result;
-        _isLoading = false;
+    _currentPath = result;
-      });
+    _error = null;
-    } catch (e) {
+    await _loadDirectory();
-      setState(() {
-        _error = '读取目录失败: $e';
-        _items = [];
-        _isLoading = false;
-      });
-    }
   }
 
-  /// 进入子目录
+  void _showPermissionDeniedDialog() {
-  void _enterDirectory(String path) {
+    showDialog(
-    setState(() {
+      context: context,
-      _currentPath = path;
+      builder: (ctx) => AlertDialog(
-    });
+        title: const Text('需要存储权限', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
-    _loadDirectory();
+        content: const Text(
-  }
+          'Android 11+ 需要在系统设置中授予"所有文件访问权限"才能读取目录中的 Markdown 文件。\n\n是否前往设置？',
-
+          style: TextStyle(fontSize: 14, color: Color(0xFF666666), height: 1.6),
-  /// 返回上级目录
+        ),
-  void _goBack() {
+        actions: [
-    final parent = Directory(_currentPath).parent.path;
+          TextButton(
-    if (parent == _currentPath) return;
+            onPressed: () => Navigator.pop(ctx),
-    _enterDirectory(parent);
+            child: const Text('取消', style: TextStyle(color: Color(0xFF999999))),
-  }
+          ),
-
+          TextButton(
-  /// 打开 Markdown 文件
+            onPressed: () {
-  void _openFile(String path) {
+              Navigator.pop(ctx);
-    Navigator.push(
+              openAppSettings();
-      context,
+            },
-      MaterialPageRoute(
+            child: const Text('前往设置', style: TextStyle(color: Color(0xFF1A1A1A))),
-        builder: (context) => MdViewerPage(filePath: path),
+          ),
+        ],
       ),
     );
   }
 
-  /// 判断是否可以返回上级
+  /// 递归检查目录（含子目录）是否包含 Markdown 文件
-  bool get _canGoBack => _currentPath != _basePath;
+  bool _hasMarkdownFiles(String dirPath) {
-
+    try {
-  /// 获取当前显示路径（相对路径）
+      final dir = Directory(dirPath);
-  String get _displayPath {
+      if (!dir.existsSync()) return false;
-    if (_currentPath == _basePath) return 'markdown';
+      for (final entity in dir.listSync(recursive: true, followLinks: false)) {
-    return _currentPath.substring(_basePath.length + 1);
+        if (entity is File) {
+          final lower = p.basename(entity.path).toLowerCase();
+          if (lower.endsWith('.md') || lower.endsWith('.markdown') || lower.endsWith('.mdown') || lower.endsWith('.txt')) {
+            return true;
           }
+        }
+      }
+    } catch (_) {}
+    return false;
+  }
+
+  /// 递归检查目录是否只有图片文件（无 markdown、无非图片文件）
+  bool _isImageOnlyDir(String dirPath) {
+    try {
+      final dir = Directory(dirPath);
+      if (!dir.existsSync()) return false;
+      const imageExts = ['.png', '.jpg', '.jpeg', '.gif', '.webp', '.bmp', '.svg', '.ico', '.tiff', '.heic', '.webm'];
+      bool hasAnyFile = false;
+      for (final entity in dir.listSync(recursive: true, followLinks: false)) {
+        if (entity is File) {
+          hasAnyFile = true;
+          final lower = p.basename(entity.path).toLowerCase();
+          if (lower.endsWith('.md') || lower.endsWith('.markdown') || lower.endsWith('.mdown') || lower.endsWith('.txt')) {
+            return false;
+          }
+          if (!imageExts.any((ext) => lower.endsWith(ext))) {
+            return false;
+          }
+        }
+      }
+      return hasAnyFile;
+    } catch (_) {}
+    return false;
+  }
+
+  /// 判断目录是否应该被过滤掉
+  bool _shouldFilterDir(String dirPath) {
+    if (!_showEmptyDirs && !_hasMarkdownFiles(dirPath)) return true;
+    if (!_showImageOnlyDirs && _isImageOnlyDir(dirPath)) return true;
+    return false;
+  }
+
+  Future<void> _loadDirectory() async {
+    if (_currentPath == null) return;
+    setState(() {
+      _isLoading = true;
+      _error = null;
+      _entries = [];
+    });
+
+    try {
+      final dir = Directory(_currentPath!);
+      final exists = await dir.exists();
+      if (!exists) {
+        if (mounted) {
+          setState(() {
+            _error = '目录不存在: $_currentPath';
+            _isLoading = false;
+          });
+        }
+        return;
+      }
+
+      final list = dir.listSync(recursive: false, followLinks: false);
+
+      final entries = <_FileEntry>[];
+      for (final entity in list) {
+        final name = p.basename(entity.path);
+        if (entity is Directory) {
+          if (!_shouldFilterDir(entity.path)) {
+            entries.add(_FileEntry(name: name, path: entity.path, isDir: true));
+          }
+        } else if (entity is File) {
+          final lower = name.toLowerCase();
+          if (lower.endsWith('.md') || lower.endsWith('.markdown') || lower.endsWith('.mdown') || lower.endsWith('.txt')) {
+            final stat = entity.statSync();
+            entries.add(_FileEntry(name: name, path: entity.path, isDir: false, size: stat.size));
+          }
+        }
+      }
+
+      entries.sort((a, b) {
+        if (a.isDir != b.isDir) return a.isDir ? -1 : 1;
+        return a.name.toLowerCase().compareTo(b.name.toLowerCase());
+      });
+
+      if (mounted) {
+        setState(() {
+          _entries = entries;
+          _isLoading = false;
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        setState(() {
+          _error = '读取失败: $e';
+          _isLoading = false;
+        });
+      }
+    }
+  }
+
+  void _enterDirectory(String path) {
+    _currentPath = path;
+    _loadDirectory();
+  }
+
+  void _goBack() {
+    if (_currentPath == null || _rootPath == null || _currentPath == _rootPath) return;
+    final parent = Directory(_currentPath!).parent.path;
+    if (parent == _currentPath!) return;
+    if (!parent.startsWith(_rootPath!)) return;
+    _currentPath = parent;
+    _loadDirectory();
+  }
+
+  void _openFile(_FileEntry entry) {
+    Navigator.push(context, MaterialPageRoute(
+      builder: (context) => MdViewerPage(filePath: entry.path),
+    ));
+  }
+
+  void _showSettingsSheet() {
+    showModalBottomSheet(
+      context: context,
+      backgroundColor: Colors.white,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
+      ),
+      builder: (ctx) {
+        return StatefulBuilder(
+          builder: (ctx, setLocalState) => Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Container(
+                  width: 36, height: 4,
+                  decoration: BoxDecoration(
+                    color: const Color(0xFFDDDDDD),
+                    borderRadius: BorderRadius.circular(2),
+                  ),
+                ),
+                const SizedBox(height: 20),
+                const Align(
+                  alignment: Alignment.centerLeft,
+                  child: Text('目录显示设置', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A))),
+                ),
+                const SizedBox(height: 16),
+                SwitchListTile(
+                  contentPadding: EdgeInsets.zero,
+                  title: const Text('显示空目录', style: TextStyle(fontSize: 14, color: Color(0xFF333333))),
+                  subtitle: const Text('关闭后隐藏无 Markdown 文件的目录', style: TextStyle(fontSize: 12, color: Color(0xFF999999))),
+                  value: _showEmptyDirs,
+                  activeColor: const Color(0xFF1A1A1A),
+                  onChanged: (val) {
+                    setLocalState(() => _showEmptyDirs = val);
+                    UserPrefs().setShowEmptyDirs(val);
+                    setState(() {});
+                    _loadDirectory();
+                  },
+                ),
+                const Divider(height: 0.5, color: Color(0xFFF0F0F0)),
+                SwitchListTile(
+                  contentPadding: EdgeInsets.zero,
+                  title: const Text('显示纯图片目录', style: TextStyle(fontSize: 14, color: Color(0xFF333333))),
+                  subtitle: const Text('关闭后隐藏只含图片、无 Markdown 的目录', style: TextStyle(fontSize: 12, color: Color(0xFF999999))),
+                  value: _showImageOnlyDirs,
+                  activeColor: const Color(0xFF1A1A1A),
+                  onChanged: (val) {
+                    setLocalState(() => _showImageOnlyDirs = val);
+                    UserPrefs().setShowImageOnlyDirs(val);
+                    setState(() {});
+                    _loadDirectory();
+                  },
+                ),
+                const SizedBox(height: 20),
+              ],
+            ),
+          ),
+        );
+      },
+    );
+  }
+
+  bool get _canGoBack => _currentPath != null && _rootPath != null && _currentPath != _rootPath;
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: Colors.white,
-      body: Column(
+      appBar: AppBar(
-        children: [
+        backgroundColor: Colors.white,
-          // 紧凑顶部栏
+        elevation: 0,
-          _buildHeader(),
+        title: Text(
-          // 内容区域
+          _currentPath != null ? p.basename(_currentPath!) : 'Markdown 阅读',
-          Expanded(
+          style: const TextStyle(fontSize: 17, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A)),
-            child: _buildBody(),
         ),
-        ],
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back, color: Color(0xFF1A1A1A)),
+          onPressed: () => Navigator.pop(context),
         ),
-    );
+        actions: [
-  }
-
-  /// 构建紧凑顶部栏
-  Widget _buildHeader() {
-    final topPadding = MediaQuery.of(context).padding.top;
-    return Container(
-      padding: EdgeInsets.only(top: topPadding, left: 12, right: 12, bottom: 8),
-      decoration: const BoxDecoration(
-        color: Colors.white,
-        border: Border(
-          bottom: BorderSide(color: Color(0xFFF0F0F0), width: 0.5),
-        ),
-      ),
-      child: Row(
-        children: [
-          // 返回按钮
           if (_canGoBack)
+            Padding(
+              padding: const EdgeInsets.only(right: 8),
+              child: GestureDetector(
+                onTap: _goBack,
+                child: Container(
+                  padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 5),
+                  decoration: BoxDecoration(
+                    color: const Color(0xFFF5F5F5),
+                    borderRadius: BorderRadius.circular(14),
+                    border: Border.all(color: const Color(0xFFE8E8E8), width: 0.5),
+                  ),
+                  child: const Text('返回上级', style: TextStyle(fontSize: 12, color: Color(0xFF666666))),
+                ),
+              ),
+            ),
+          if (_currentPath != null)
+            Padding(
+              padding: const EdgeInsets.only(right: 4),
+              child: GestureDetector(
+                onTap: _pickDirectory,
+                child: Container(
+                  padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 5),
+                  decoration: BoxDecoration(
+                    color: const Color(0xFFF5F5F5),
+                    borderRadius: BorderRadius.circular(14),
+                    border: Border.all(color: const Color(0xFFE8E8E8), width: 0.5),
+                  ),
+                  child: const Text('更换目录', style: TextStyle(fontSize: 12, color: Color(0xFF888888))),
+                ),
+              ),
+            ),
           IconButton(
-              icon: const Icon(Icons.arrow_back, size: 20),
+            icon: const Icon(Icons.tune, size: 20, color: Color(0xFF888888)),
-              padding: EdgeInsets.zero,
+            onPressed: _showSettingsSheet,
-              constraints: const BoxConstraints(minWidth: 32, minHeight: 32),
-              onPressed: _goBack,
-            )
-          else
-            const SizedBox(width: 8),
-          // 路径标题
-          Expanded(
-            child: Text(
-              _canGoBack ? _displayPath : '文件列表',
-              style: const TextStyle(
-                fontSize: 15,
-                fontWeight: FontWeight.w500,
-                color: Color(0xFF1A1A1A),
-              ),
-              maxLines: 1,
-              overflow: TextOverflow.ellipsis,
-            ),
           ),
+          const SizedBox(width: 4),
         ],
       ),
+      body: _buildBody(),
     );
   }
 
   Widget _buildBody() {
+    if (_currentPath == null) {
+      return _buildWelcome();
+    }
+
     if (_isLoading) {
       return const Center(child: CircularProgressIndicator(color: Color(0xFF1A1A1A)));
     }
 
     if (_error != null) {
-      return _buildErrorState();
+      return _buildError();
-    }
-
-    if (_items.isEmpty) {
-      return _buildEmptyState();
     }
 
     return RefreshIndicator(
       onRefresh: _loadDirectory,
       color: const Color(0xFF1A1A1A),
       backgroundColor: Colors.white,
-      child: ListView.builder(
+      child: _entries.isEmpty ? _buildEmpty() : ListView.separated(
         padding: EdgeInsets.zero,
-        itemCount: _items.length,
+        itemCount: (_canGoBack ? 1 : 0) + _entries.length,
+        separatorBuilder: (_, __) => const Divider(height: 0.5, thickness: 0.5, color: Color(0xFFF0F0F0)),
         itemBuilder: (context, index) {
-          final item = _items[index];
+          if (_canGoBack && index == 0) {
-          final isDirectory = item is Directory;
+            return ListTile(
-          final name = p.basename(item.path);
+              leading: Container(
-          final isMdFile = !isDirectory && name.toLowerCase().endsWith('.md');
+                width: 36, height: 36,
-
+                decoration: BoxDecoration(
-          // 跳过非 md 文件和非目录项
+                  color: const Color(0xFFF5F5F5),
-          if (!isDirectory && !isMdFile) {
+                  borderRadius: BorderRadius.circular(8),
-            return const SizedBox.shrink();
-          }
-
-          return _buildListItem(item, isDirectory, name);
-        },
                 ),
+                child: const Icon(Icons.arrow_upward, size: 18, color: Color(0xFF888888)),
+              ),
+              title: const Text('..', style: TextStyle(fontSize: 14, color: Color(0xFF888888))),
+              onTap: _goBack,
             );
           }
-
+          final entry = _entries[_canGoBack ? index - 1 : index];
-  Widget _buildListItem(FileSystemEntity item, bool isDirectory, String name) {
+          return ListTile(
-    return InkWell(
+            leading: Container(
-      onTap: () {
+              width: 36, height: 36,
-        if (isDirectory) {
-          _enterDirectory(item.path);
-        } else {
-          _openFile(item.path);
-        }
-      },
-      child: Container(
-        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),
-        decoration: const BoxDecoration(
-          border: Border(
-            bottom: BorderSide(color: Color(0xFFF0F0F0), width: 0.5),
-          ),
-        ),
-        child: Row(
-          children: [
-            Container(
-              width: 36,
-              height: 36,
               decoration: BoxDecoration(
-                color: isDirectory ? const Color(0xFFF0F7FF) : const Color(0xFFF5F5F5),
+                color: entry.isDir ? const Color(0xFFF0F7FF) : const Color(0xFFF5F5F5),
                 borderRadius: BorderRadius.circular(8),
               ),
               child: Icon(
-                isDirectory ? Icons.folder_outlined : Icons.description_outlined,
+                entry.isDir ? Icons.folder_outlined : Icons.description_outlined,
-                color: isDirectory ? const Color(0xFF4A90D9) : const Color(0xFF666666),
                 size: 18,
+                color: entry.isDir ? const Color(0xFF4A90D9) : const Color(0xFF666666),
               ),
             ),
-            const SizedBox(width: 10),
+            title: Text(entry.name, style: const TextStyle(fontSize: 14, color: Color(0xFF1A1A1A)), maxLines: 1, overflow: TextOverflow.ellipsis),
-            Expanded(
+            subtitle: entry.isDir ? null : Text(_formatSize(entry.size), style: const TextStyle(fontSize: 11, color: Color(0xFF999999))),
-              child: Column(
+            trailing: Icon(entry.isDir ? Icons.chevron_right : Icons.open_in_new_outlined, size: 16, color: const Color(0xFFCCCCCC)),
-                crossAxisAlignment: CrossAxisAlignment.start,
+            onTap: () => entry.isDir ? _enterDirectory(entry.path) : _openFile(entry),
-                children: [
+          );
-                  Text(
+        },
-                    name,
-                    style: const TextStyle(
-                      fontSize: 14,
-                      color: Color(0xFF1A1A1A),
-                    ),
-                    maxLines: 1,
-                    overflow: TextOverflow.ellipsis,
-                  ),
-                  if (!isDirectory)
-                    Text(
-                      _formatFileSize(item),
-                      style: const TextStyle(
-                        fontSize: 11,
-                        color: Color(0xFF999999),
-                      ),
-                    ),
-                ],
-              ),
-            ),
-            if (isDirectory)
-              const Icon(Icons.chevron_right, color: Color(0xFFCCCCCC), size: 18)
-            else
-              const Icon(Icons.open_in_new_outlined, color: Color(0xFFCCCCCC), size: 16),
-          ],
-        ),
       ),
     );
   }
 
-  /// 格式化文件大小
+  Widget _buildWelcome() {
-  String _formatFileSize(FileSystemEntity entity) {
-    try {
-      if (entity is File) {
-        final stat = entity.statSync();
-        final size = stat.size;
-        if (size < 1024) return '$size B';
-        if (size < 1024 * 1024) return '${(size / 1024).toStringAsFixed(1)} KB';
-        return '${(size / (1024 * 1024)).toStringAsFixed(1)} MB';
-      }
-    } catch (_) {}
-    return '';
-  }
-
-  Widget _buildEmptyState() {
-    return const Center(
-      child: Column(
-        mainAxisAlignment: MainAxisAlignment.center,
-        children: [
-          Icon(
-            Icons.folder_open_outlined,
-            size: 64,
-            color: Color(0xFFE0E0E0),
-          ),
-          SizedBox(height: 20),
-          Text(
-            '暂无 Markdown 文件',
-            style: TextStyle(
-              fontSize: 16,
-              fontWeight: FontWeight.w500,
-              color: Color(0xFF999999),
-            ),
-          ),
-          SizedBox(height: 8),
-          Padding(
-            padding: EdgeInsets.symmetric(horizontal: 40),
-            child: Text(
-              '请在 /Documents/mooknote/markdown 目录下放置 .md 文件',
-              style: TextStyle(
-                fontSize: 13,
-                color: Color(0xFFCCCCCC),
-              ),
-              textAlign: TextAlign.center,
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-
-  Widget _buildErrorState() {
     return Center(
+      child: Padding(
+        padding: const EdgeInsets.all(40),
         child: Column(
-        mainAxisAlignment: MainAxisAlignment.center,
+          mainAxisSize: MainAxisSize.min,
           children: [
-          const Icon(
+            Container(
-            Icons.error_outline,
+              width: 80, height: 80,
-            size: 48,
+              decoration: BoxDecoration(
-            color: Color(0xFFCCCCCC),
+                color: const Color(0xFFF5F5F5),
-          ),
+                borderRadius: BorderRadius.circular(20),
-          const SizedBox(height: 16),
-          Padding(
-            padding: const EdgeInsets.symmetric(horizontal: 40),
-            child: Text(
-              _error!,
-              style: const TextStyle(
-                fontSize: 14,
-                color: Color(0xFF999999),
-              ),
-              textAlign: TextAlign.center,
               ),
+              child: const Icon(Icons.folder_open_outlined, size: 40, color: Color(0xFFCCCCCC)),
             ),
             const SizedBox(height: 24),
-          ElevatedButton(
+            const Text('Markdown 阅读', style: TextStyle(fontSize: 20, fontWeight: FontWeight.w600, color: Color(0xFF1A1A1A))),
-            onPressed: _loadDirectory,
+            const SizedBox(height: 8),
-            style: ElevatedButton.styleFrom(
+            const Text('选择一个包含 .md 文件的文件夹', style: TextStyle(fontSize: 14, color: Color(0xFF999999))),
-              backgroundColor: const Color(0xFF1A1A1A),
+            const SizedBox(height: 32),
-              foregroundColor: Colors.white,
+            GestureDetector(
-              elevation: 0,
+              onTap: _pickDirectory,
-              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
+              child: Container(
-              padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
+                padding: const EdgeInsets.symmetric(horizontal: 32, vertical: 14),
+                decoration: BoxDecoration(
+                  color: const Color(0xFF1A1A1A),
+                  borderRadius: BorderRadius.circular(24),
+                ),
+                child: const Text('选择目录', style: TextStyle(fontSize: 15, color: Colors.white, fontWeight: FontWeight.w500)),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildEmpty() {
+    return Center(
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          const Icon(Icons.folder_open_outlined, size: 64, color: Color(0xFFE0E0E0)),
+          const SizedBox(height: 16),
+          const Text('此目录下没有 Markdown 文件', style: TextStyle(fontSize: 15, color: Color(0xFF999999))),
+          const SizedBox(height: 4),
+          Text(_currentPath ?? '', style: const TextStyle(fontSize: 12, color: Color(0xFFCCCCCC))),
+          const SizedBox(height: 24),
+          GestureDetector(
+            onTap: _canGoBack ? _goBack : () => _pickDirectory(),
+            child: Container(
+              padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 10),
+              decoration: BoxDecoration(
+                border: Border.all(color: const Color(0xFFDDDDDD)),
+                borderRadius: BorderRadius.circular(20),
+              ),
+              child: Text(
+                _canGoBack ? '返回上级目录' : '换一个目录',
+                style: const TextStyle(fontSize: 13, color: Color(0xFF888888)),
+              ),
             ),
-            child: const Text('重试'),
           ),
         ],
       ),
     );
   }
+
+  Widget _buildError() {
+    return Center(
+      child: Padding(
+        padding: const EdgeInsets.all(40),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            const Icon(Icons.error_outline, size: 48, color: Color(0xFFCCCCCC)),
+            const SizedBox(height: 16),
+            Text(_error!, style: const TextStyle(fontSize: 14, color: Color(0xFF999999)), textAlign: TextAlign.center),
+            const SizedBox(height: 8),
+            Text('路径: ${_currentPath ?? ""}', style: const TextStyle(fontSize: 12, color: Color(0xFFCCCCCC))),
+            const SizedBox(height: 24),
+            Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                GestureDetector(
+                  onTap: _loadDirectory,
+                  child: Container(
+                    padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 10),
+                    decoration: BoxDecoration(
+                      color: const Color(0xFF1A1A1A),
+                      borderRadius: BorderRadius.circular(20),
+                    ),
+                    child: const Text('重试', style: TextStyle(fontSize: 13, color: Colors.white)),
+                  ),
+                ),
+                const SizedBox(width: 12),
+                GestureDetector(
+                  onTap: _pickDirectory,
+                  child: Container(
+                    padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 10),
+                    decoration: BoxDecoration(
+                      border: Border.all(color: const Color(0xFFDDDDDD)),
+                      borderRadius: BorderRadius.circular(20),
+                    ),
+                    child: const Text('更换目录', style: TextStyle(fontSize: 13, color: Color(0xFF888888))),
+                  ),
+                ),
+              ],
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  String _formatSize(int? bytes) {
+    if (bytes == null) return '';
+    if (bytes < 1024) return '$bytes B';
+    if (bytes < 1024 * 1024) return '${(bytes / 1024).toStringAsFixed(1)} KB';
+    return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
+  }
+}
+
+class _FileEntry {
+  final String name;
+  final String path;
+  final bool isDir;
+  final int? size;
+
+  _FileEntry({required this.name, required this.path, required this.isDir, this.size});
 }

lib/pages/markdown_reader/md_viewer_page.dart

@@ -1,6 +1,6 @@
 import 'dart:io';
 import 'package:flutter/material.dart';
-import 'package:flutter_markdown/flutter_markdown.dart';
+import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
 
 /// Markdown 文件查看页面
 class MdViewerPage extends StatefulWidget {
@@ -132,7 +132,8 @@ class _MdViewerPageState extends State<MdViewerPage> {
           decoration: TextDecoration.underline,
         ),
       ),
-      sizedImageBuilder: (config) => _buildImage(config.uri.toString(), config.alt),
+      // ignore: deprecated_member_use
+      imageBuilder: (uri, title, alt) => _buildImage(uri.toString(), alt),
     );
   }
 

lib/pages/note/note_form_page.dart

@@ -551,17 +551,21 @@ class _NoteFormPageState extends State<NoteFormPage> {
 
     showDialog(
       context: context,
-      builder: (context) => AlertDialog(
+      builder: (ctx) => StatefulBuilder(
+        builder: (ctx, setDialogState) => AlertDialog(
         backgroundColor: Colors.white,
         elevation: 0,
-        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
+        titlePadding: const EdgeInsets.fromLTRB(24, 24, 24, 0),
         title: const Text(
           '添加标签',
           style: TextStyle(
             fontSize: 18,
             fontWeight: FontWeight.w600,
+            color: Color(0xFF1A1A1A),
           ),
         ),
+        contentPadding: const EdgeInsets.fromLTRB(24, 16, 24, 0),
         content: SizedBox(
           width: double.maxFinite,
           child: Column(
@@ -572,31 +576,38 @@ class _NoteFormPageState extends State<NoteFormPage> {
               TextField(
                 controller: controller,
                 autofocus: true,
+                style: const TextStyle(fontSize: 14, color: Color(0xFF1A1A1A)),
+                cursorColor: const Color(0xFF1A1A1A),
                 decoration: InputDecoration(
                   hintText: '输入新标签名称',
-                  hintStyle: const TextStyle(
+                  hintStyle: const TextStyle(fontSize: 14, color: Color(0xFFBBBBBB)),
-                    fontSize: 14,
-                    color: Color(0xFF999999),
-                  ),
                   filled: true,
-                  fillColor: const Color(0xFFFAFAFA),
+                  fillColor: const Color(0xFFF8F8F8),
+                  contentPadding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
                   border: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(8),
+                    borderRadius: BorderRadius.circular(10),
-                    borderSide: const BorderSide(color: Color(0xFFE8E8E8), width: 0.5),
+                    borderSide: BorderSide.none,
                   ),
                   enabledBorder: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(8),
+                    borderRadius: BorderRadius.circular(10),
-                    borderSide: const BorderSide(color: Color(0xFFE8E8E8), width: 0.5),
+                    borderSide: BorderSide.none,
                   ),
                   focusedBorder: OutlineInputBorder(
-                    borderRadius: BorderRadius.circular(8),
+                    borderRadius: BorderRadius.circular(10),
                     borderSide: const BorderSide(color: Color(0xFF1A1A1A), width: 1),
                   ),
-                  contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
+                  suffixIcon: controller.text.isNotEmpty
+                      ? IconButton(
+                          icon: const Icon(Icons.clear, size: 16, color: Color(0xFFAAAAAA)),
+                          onPressed: () => controller.clear(),
+                        )
+                      : null,
                 ),
+                onChanged: (_) => setDialogState(() {}),
                 onSubmitted: (value) {
                   _addTag(value);
-                  Navigator.pop(context);
+                  controller.clear();
+                  setDialogState(() {});
                 },
               ),
 
@@ -604,29 +615,37 @@ class _NoteFormPageState extends State<NoteFormPage> {
               if (availableTags.isNotEmpty) ...[
                 const SizedBox(height: 20),
                 const Text(
-                  '或选择已有标签：',
+                  '或选择已有标签',
                   style: TextStyle(
-                    fontSize: 13,
+                    fontSize: 12,
-                    color: Color(0xFF999999),
+                    color: Color(0xFFAAAAAA),
                   ),
                 ),
                 const SizedBox(height: 12),
-                SizedBox(
+                ConstrainedBox(
-                  height: 200,
+                  constraints: const BoxConstraints(maxHeight: 180),
-                  child: ListView(
+                  child: SingleChildScrollView(
-                    shrinkWrap: true,
+                    child: Wrap(
+                      spacing: 8,
+                      runSpacing: 8,
                       children: availableTags.map((tag) {
                         return InkWell(
                           onTap: () {
                             _addTag(tag);
-                          Navigator.pop(context);
+                            Navigator.pop(ctx);
                           },
-                        child: Padding(
+                          borderRadius: BorderRadius.circular(16),
-                          padding: const EdgeInsets.symmetric(vertical: 6),
+                          child: Container(
+                            padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
+                            decoration: BoxDecoration(
+                              color: const Color(0xFFF5F5F5),
+                              borderRadius: BorderRadius.circular(16),
+                              border: Border.all(color: const Color(0xFFE8E8E8), width: 0.5),
+                            ),
                             child: Text(
                               tag,
                               style: const TextStyle(
-                              fontSize: 14,
+                                fontSize: 13,
                                 color: Color(0xFF555555),
                               ),
                             ),
@@ -635,37 +654,48 @@ class _NoteFormPageState extends State<NoteFormPage> {
                       }).toList(),
                     ),
                   ),
+                ),
               ],
+
+              if (availableTags.isEmpty)
+                Padding(
+                  padding: const EdgeInsets.only(top: 16, bottom: 8),
+                  child: Center(
+                    child: Text(
+                      '暂无已有标签',
+                      style: TextStyle(fontSize: 13, color: Colors.grey[400]),
+                    ),
+                  ),
+                ),
             ],
           ),
         ),
         actions: [
           TextButton(
-            onPressed: () => Navigator.pop(context),
+            onPressed: () => Navigator.pop(ctx),
             style: TextButton.styleFrom(
-              foregroundColor: const Color(0xFF666666),
+              foregroundColor: const Color(0xFF999999),
               padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
             ),
-            child: const Text('取消'),
+            child: const Text('取消', style: TextStyle(fontSize: 14)),
           ),
           ElevatedButton(
             onPressed: () {
               _addTag(controller.text);
-              Navigator.pop(context);
+              Navigator.pop(ctx);
             },
             style: ElevatedButton.styleFrom(
               backgroundColor: const Color(0xFF1A1A1A),
               foregroundColor: Colors.white,
               elevation: 0,
-              shape: RoundedRectangleBorder(
+              shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
-                borderRadius: BorderRadius.circular(8),
+              padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 8),
             ),
-              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+            child: const Text('添加', style: TextStyle(fontSize: 14)),
-            ),
-            child: const Text('添加'),
           ),
         ],
-        actionsPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+        actionsPadding: const EdgeInsets.fromLTRB(16, 8, 16, 16),
+        ),
       ),
     );
   }

lib/pages/stroll_page.dart

@@ -0,0 +1,363 @@
+import 'dart:io';
+import 'dart:math';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import '../providers/app_provider.dart';
+import '../models/data_models.dart';
+
+/// 漫步页面 - 随机发现一条内容
+class StrollPage extends StatefulWidget {
+  const StrollPage({super.key});
+
+  @override
+  State<StrollPage> createState() => _StrollPageState();
+}
+
+class _StrollPageState extends State<StrollPage> {
+  final _random = Random();
+  _StrollItem? _currentItem;
+
+  @override
+  void initState() {
+    super.initState();
+    _refresh();
+  }
+
+  void _refresh() {
+    final provider = context.read<AppProvider>();
+
+    // 按类别分组
+    final movies = provider.movies.where((m) => !m.isDeleted).toList();
+    final books = provider.books.where((b) => !b.isDeleted).toList();
+    final notes = provider.notes.where((n) => !n.isDeleted).toList();
+
+    // 收集非空类别
+    final categories = <String, List<dynamic>>{};
+    if (movies.isNotEmpty) categories['movie'] = movies;
+    if (books.isNotEmpty) categories['book'] = books;
+    if (notes.isNotEmpty) categories['note'] = notes;
+
+    if (categories.isEmpty) {
+      setState(() => _currentItem = null);
+      return;
+    }
+
+    // 先等概率选类别，再从该类中随机选一条
+    final categoryKeys = categories.keys.toList();
+    final pickedCategory = categoryKeys[_random.nextInt(categoryKeys.length)];
+
+    _StrollItem item;
+    switch (pickedCategory) {
+      case 'movie':
+        final m = movies[_random.nextInt(movies.length)];
+        item = _StrollItem(
+          type: 'movie',
+          title: m.title,
+          subtitle: m.alternateTitles.isNotEmpty ? m.alternateTitles.first : '',
+          detail: _buildMovieDetail(m),
+          imagePath: m.posterPath,
+          icon: Icons.movie_outlined,
+          label: '影视',
+        );
+        break;
+      case 'book':
+        final b = books[_random.nextInt(books.length)];
+        item = _StrollItem(
+          type: 'book',
+          title: b.title,
+          subtitle: b.authors.isNotEmpty ? b.authors.first : '',
+          detail: _buildBookDetail(b),
+          imagePath: b.coverPath,
+          icon: Icons.menu_book_outlined,
+          label: '书籍',
+        );
+        break;
+      case 'note':
+        final n = notes[_random.nextInt(notes.length)];
+        item = _StrollItem(
+          type: 'note',
+          title: n.title.isNotEmpty ? n.title : '无标题',
+          subtitle: '${n.content.length} 字 · ${n.tags.isNotEmpty ? n.tags.take(2).join(' / ') : '无标签'}',
+          detail: n.content,
+          imagePath: n.images.isNotEmpty ? n.images.first : null,
+          icon: Icons.note_outlined,
+          label: '笔记',
+        );
+        break;
+      default:
+        setState(() => _currentItem = null);
+        return;
+    }
+
+    setState(() => _currentItem = item);
+  }
+
+  String _buildMovieDetail(Movie m) {
+    final parts = <String>[];
+    if (m.rating != null && m.rating! > 0) parts.add('评分 ${m.rating!.toStringAsFixed(1)}');
+    if (m.genres.isNotEmpty) parts.add(m.genres.take(3).join(' / '));
+    if (m.status == 'watched') parts.add('已看');
+    if (m.status == 'watching') parts.add('在看');
+    return parts.join(' · ');
+  }
+
+  String _buildBookDetail(Book b) {
+    final parts = <String>[];
+    if (b.rating != null && b.rating! > 0) parts.add('评分 ${b.rating!.toStringAsFixed(1)}');
+    if (b.publisher != null && b.publisher!.isNotEmpty) parts.add(b.publisher!);
+    if (b.status == 'read') parts.add('已读');
+    if (b.status == 'reading') parts.add('在读');
+    return parts.join(' · ');
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: Colors.white,
+      appBar: AppBar(
+        title: const Text('漫步'),
+        actions: [
+          Padding(
+            padding: const EdgeInsets.only(right: 12),
+            child: GestureDetector(
+              onTap: _refresh,
+              child: Container(
+                padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 6),
+                decoration: BoxDecoration(
+                  color: const Color(0xFFF5F5F5),
+                  borderRadius: BorderRadius.circular(16),
+                  border: Border.all(color: const Color(0xFFE8E8E8), width: 0.5),
+                ),
+                child: Row(
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    const Icon(Icons.refresh, size: 14, color: Color(0xFF666666)),
+                    const SizedBox(width: 4),
+                    const Text(
+                      '换一个',
+                      style: TextStyle(fontSize: 12, color: Color(0xFF666666)),
+                    ),
+                  ],
+                ),
+              ),
+            ),
+          ),
+        ],
+      ),
+      body: _currentItem == null
+          ? const Center(
+              child: Text(
+                '还没有任何内容\n去添加一些吧',
+                textAlign: TextAlign.center,
+                style: TextStyle(fontSize: 15, color: Color(0xFFBBBBBB), height: 1.6),
+              ),
+            )
+          : Consumer<AppProvider>(
+              builder: (context, provider, _) {
+                final item = _currentItem!;
+
+                // 笔记：独立卡片样式
+                if (item.type == 'note') {
+                  return _buildNoteCard(item);
+                }
+
+                // 影视/书籍：海报+信息样式
+                final hasImage = item.imagePath != null &&
+                    item.imagePath!.isNotEmpty &&
+                    File(item.imagePath!).existsSync();
+
+                return Center(
+                  child: SingleChildScrollView(
+                    padding: const EdgeInsets.all(32),
+                    child: Column(
+                      mainAxisSize: MainAxisSize.min,
+                      children: [
+                        // 类型标签
+                        _buildTypeChip(item),
+
+                        const SizedBox(height: 28),
+
+                        // 海报/封面/图标
+                        if (hasImage)
+                          ClipRRect(
+                            borderRadius: BorderRadius.circular(16),
+                            child: Image.file(
+                              File(item.imagePath!),
+                              width: 200,
+                              height: 260,
+                              fit: BoxFit.cover,
+                              errorBuilder: (_, __, ___) => _buildPlaceholder(item),
+                            ),
+                          )
+                        else
+                          _buildPlaceholder(item),
+
+                        const SizedBox(height: 28),
+
+                        // 标题
+                        Text(
+                          item.title,
+                          textAlign: TextAlign.center,
+                          style: const TextStyle(
+                            fontSize: 22,
+                            fontWeight: FontWeight.w700,
+                            color: Color(0xFF1A1A1A),
+                            height: 1.3,
+                          ),
+                        ),
+
+                        // 副标题
+                        if (item.subtitle.isNotEmpty) ...[
+                          const SizedBox(height: 8),
+                          Text(
+                            item.subtitle,
+                            textAlign: TextAlign.center,
+                            style: const TextStyle(fontSize: 14, color: Color(0xFF999999)),
+                          ),
+                        ],
+
+                        // 详情
+                        if (item.detail.isNotEmpty) ...[
+                          const SizedBox(height: 6),
+                          Text(
+                            item.detail,
+                            textAlign: TextAlign.center,
+                            style: const TextStyle(fontSize: 13, color: Color(0xFFAAAAAA)),
+                          ),
+                        ],
+
+                        const SizedBox(height: 40),
+                      ],
+                    ),
+                  ),
+                );
+              },
+            ),
+    );
+  }
+
+  Widget _buildTypeChip(_StrollItem item) {
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 5),
+      decoration: BoxDecoration(
+        color: const Color(0xFFF5F5F5),
+        borderRadius: BorderRadius.circular(16),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(item.icon, size: 14, color: const Color(0xFF999999)),
+          const SizedBox(width: 6),
+          Text(item.label, style: const TextStyle(fontSize: 12, color: Color(0xFF888888))),
+        ],
+      ),
+    );
+  }
+
+  /// 笔记卡片样式
+  Widget _buildNoteCard(_StrollItem item) {
+    return Center(
+      child: SingleChildScrollView(
+        padding: const EdgeInsets.all(24),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            _buildTypeChip(item),
+            const SizedBox(height: 24),
+
+            // 笔记卡片 - 类似分享海报
+            Container(
+              width: double.infinity,
+              constraints: const BoxConstraints(maxWidth: 340),
+              decoration: BoxDecoration(
+                color: Colors.white,
+                borderRadius: BorderRadius.circular(16),
+                boxShadow: [
+                  BoxShadow(
+                    color: Colors.black.withOpacity(0.08),
+                    blurRadius: 20,
+                    offset: const Offset(0, 8),
+                  ),
+                ],
+              ),
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  // 内容
+                  Padding(
+                    padding: const EdgeInsets.all(24),
+                    child: Text(
+                      item.detail,
+                      style: const TextStyle(
+                        fontSize: 15,
+                        color: Color(0xFF333333),
+                        height: 1.8,
+                      ),
+                    ),
+                  ),
+
+                  // 底部分隔
+                  Container(height: 0.5, color: const Color(0xFFEEEEEE)),
+                  Padding(
+                    padding: const EdgeInsets.all(16),
+                    child: Row(
+                      children: [
+                        const Icon(Icons.note_outlined, size: 13, color: Color(0xFFCCCCCC)),
+                        const SizedBox(width: 6),
+                        Text(
+                          '${item.detail.length} 字',
+                          style: const TextStyle(fontSize: 11, color: Color(0xFFBBBBBB)),
+                        ),
+                        const Spacer(),
+                        const Text(
+                          'Mooknote',
+                          style: TextStyle(fontSize: 11, color: Color(0xFFDDDDDD)),
+                        ),
+                      ],
+                    ),
+                  ),
+                ],
+              ),
+            ),
+
+            const SizedBox(height: 32),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildPlaceholder(_StrollItem item) {
+    return Container(
+      width: 120,
+      height: 160,
+      decoration: BoxDecoration(
+        color: const Color(0xFFFAFAFA),
+        borderRadius: BorderRadius.circular(16),
+        border: Border.all(color: const Color(0xFFEEEEEE), width: 0.5),
+      ),
+      child: Icon(item.icon, size: 40, color: const Color(0xFFDDDDDD)),
+    );
+  }
+}
+
+class _StrollItem {
+  final String type;
+  final String title;
+  final String subtitle;
+  final String detail;
+  final String? imagePath;
+  final IconData icon;
+  final String label;
+
+  _StrollItem({
+    required this.type,
+    required this.title,
+    required this.subtitle,
+    required this.detail,
+    this.imagePath,
+    required this.icon,
+    required this.label,
+  });
+}

lib/utils/user_prefs.dart

@@ -66,6 +66,20 @@ class UserPrefs {
 
   // ========== 应用图标设置 ==========
 
+  /// Markdown 阅读器最近选择的目录
+  String? get lastMdFolder => prefs.getString('lastMdFolder');
+  Future<bool> setLastMdFolder(String value) => prefs.setString('lastMdFolder', value);
+
+  /// 是否显示空目录（无 Markdown 文件的目录）
+  bool get showEmptyDirs => prefs.getBool('showEmptyDirs') ?? true;
+  Future<bool> setShowEmptyDirs(bool value) => prefs.setBool('showEmptyDirs', value);
+
+  /// 是否显示纯图片目录（只有图片、无 Markdown 文件的目录）
+  bool get showImageOnlyDirs => prefs.getBool('showImageOnlyDirs') ?? true;
+  Future<bool> setShowImageOnlyDirs(bool value) => prefs.setBool('showImageOnlyDirs', value);
+
+  // ========== 应用图标设置 ==========
+
   /// 当前选中的应用图标名称（对应 assets/icon/ 下的文件名，不含扩展名）
   String get appIconName => prefs.getString('appIconName') ?? 'app_icon';
   Future<bool> setAppIconName(String value) => prefs.setString('appIconName', value);

lib/widgets/note_list_item.dart

@@ -99,9 +99,9 @@ class _NoteListItemContent extends StatelessWidget {
             ],
 
             // 内容摘要（去除Markdown标记），内容为空则不显示
-            if (_cleanMarkdown(note.content).trim().isNotEmpty)
+            if (_collapseBlankLines(_cleanMarkdown(note.content).trim()).isNotEmpty)
               Text(
-                _cleanMarkdown(note.content).trim(),
+                _collapseBlankLines(_cleanMarkdown(note.content).trim()),
                 style: const TextStyle(
                   fontSize: 13,
                   color: Color(0xFF666666),
@@ -205,6 +205,11 @@ class _NoteListItemContent extends StatelessWidget {
         .trim();
   }
 
+  /// 合并连续空行为单行
+  String _collapseBlankLines(String text) {
+    return text.replaceAll(RegExp(r'\n\s*\n+'), '\n');
+  }
+
   /// 显示删除确认对话框
   void _showDeleteDialog(BuildContext context) {
     showDialog(