Added #

• iOS support (iOS 13+, CocoaPods and Swift Package Manager, privacy manifest included): storage volume information (the app's Documents directory and its capacity), openAppSettings, every file and directory operation, and file watching. iOS has no storage permission, so the permission checks return true. 新增 iOS 支持。
• watch() returns a Stream<WatchEvent>: watching starts on listen and stops on cancel, several watches can run at once, and the stream ends when the watched path is deleted or moved. WatchEvent gained watchedPath and isDirectory. 新增基于 Stream 的 watch()。
• WatchEventType.maskOf, WatchEventType.fromMask and WatchEventType.allMask.
• Native permission handling (Android 11+: All files access settings page; Android 6–10: runtime permissions). 原生权限处理。
• StorageDevice.uuid, StorageDevice.description and StorageDevice.isPrimary.
• Methods returning data (readFile, getFileInfo, calculateMD5, …) throw a PlatformException (OPERATION_FAILED) with the error message instead of a type error.

Changed #

• File and directory operations are implemented with dart:io and shared by Android and iOS instead of going through Kotlin. File contents no longer cross the platform channel, operations run concurrently, recursive listings / MD5 / directory sizes run in a background isolate, and the operations work in a plain flutter test. 文件和目录操作改用 dart:io 实现，两个平台共用。
• Events from startWatching now report the full path of the changed entry instead of the watched directory. 监视事件现在给出发生变化的文件的完整路径。
• getMimeType checks the file header (magic numbers) before the extension.
• FileInfo.canRead / canWrite / canExecute use access(2), like java.io.File.
• moveDirectory falls back to copy + delete when moving across volumes (e.g. to an SD card).
• StorageDevice.name uses the system's localized volume label when available; isReadOnly reflects whether the volume is mounted read-only rather than whether the app may write to it.
• readFile(length: 0) returns no data (it used to read to the end of the file).
• getDirectorySize no longer follows symbolic links.
• FileMode is deprecated: no API uses it and it clashes with dart:io's FileMode.
• A pending permission request survives the Activity being recreated by a configuration change.
• The plugin no longer declares MANAGE_EXTERNAL_STORAGE (nor READ_MEDIA_*); apps that need Android 11+ full access must declare it themselves (see README). 插件不再替宿主声明 MANAGE_EXTERNAL_STORAGE，需在 App 中自行声明。
• Android: AGP 9.1, Kotlin 2.4, compileSdk 36, Java 17. Dart: SDK ^3.8.0, Flutter >= 3.32. New dependencies: crypto, mime, ffi.
• Removed duplicate internal Dart files (public API unchanged).

Fixed #

• checkStoragePermissions, requestStoragePermissions, shouldShowRequestPermissionRationale, openAppSettings, checkPermission, getGrantedPermissions, stopAllWatching, getWatchedPaths and isWatching threw MissingPluginException because they had no native implementation. 以上方法此前没有原生实现，调用即抛出 MissingPluginException，现已全部实现。
• startWatching / stopWatching / stopAllWatching returned an empty result (the native side filled it in asynchronously); startWatching with no events now watches all events instead of none.
• Watching: a single file never produced events; directories moved into a recursively watched tree were not watched; two watches on the same directory stopped each other (Android shares one inotify descriptor per inode); combined inotify flags could make WatchEventType.fromValue throw.
• getAllStorageDevices crashed on Android 7–10 (StorageVolume.directory is API 30+).
• readFile crashed on empty files / offsets past EOF and could return partial data.
• Integer arguments (offset, length, size) could throw ClassCastException on the native side.
• listDirectory(recursive: true) ignored recursive.
• getMimeType always returned an empty string.
• copyFile onto the same file truncated it; copyDirectory / moveDirectory into a subdirectory of the source recursed until the disk was full; symbolic link cycles could recurse forever.
• PathUtils.exists returned false for directories, PathUtils.isAccessible returned false for empty directories, and PathUtils.hasIllegalChars treated every path separator as illegal.

Added #

• 首次发布核心功能：
  • 存储设备管理（列出设备、获取存储信息）
  • 文件操作（读取、写入、复制、移动、删除）
  • 目录操作（列表、创建、删除、信息）
  • 文件系统监视（监控目录变化）
  • 权限管理（请求和检查存储权限）
  • 路径工具（规范化、连接、分割路径）
• 完整的数据模型：
  • StorageDevice 存储设备信息
  • FileInfo 文件元数据
  • DirectoryInfo 目录详情
  • WatchEvent 文件系统事件
• Android 平台接口实现
• 原生通信的方法通道实现
• 空安全支持
• 文档和示例代码