feat: v0.3.0 - 流式播放、本地音乐、下载系统、漫游修复

### 新功能
- 流式播放：边下载边播放，缓冲 64KB 后即刻开始，无需等待完整下载
- 本地音乐页面：支持浏览、播放本地歌曲，横向菜单含「从磁盘删除」
- 下载系统：支持下载歌曲到自定义路径，保存完整元数据（封面/专辑/时长）
- 封面补全：本地音乐缺少封面时自动从网易云 API 获取
- 更新信息：接入 Gitea Releases API，查看最新版更新日志

### 修复
- 修复私人漫游播完一首歌后跳三首的问题（双重触发：audio-ended + startTick）
- 修复全屏漫游抽屉和漫游页面无封面歌曲显示破损图片
- 修复 PlayerBar 无封面歌曲显示破损图片
- 修复下载路径修改后不生效（Rust serde camelCase 映射）
- 修复本地音乐始终只显示默认路径歌曲
- 修复下载完成提示弹出 4 次
- 修复播放网络歌曲时进度条先走但无声音（audio-started 事件同步）

### 优化
- PlayerBar 下载状态：未下载显示下载按钮，下载中显示进度，已下载不显示
- audio.rs 新增 manual_stop 标志防止 stop_audio 触发虚假 audio-ended
- player.ts 新增 waitForAudioStart() 确保 playing 状态与实际播放同步
- 切歌/停止时立即清除 tickInterval 防止重复触发 next()

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "Nekosonic"
-version = "0.1.0"
+version = "0.3.0"
 description = "A Simple music app"
 authors = ["atdunbg"]
 edition = "2021"
@@ -21,12 +21,19 @@ tauri-build = { version = "2", features = [] }
 tauri = { version = "2", features = ["tray-icon"] }
 tauri-plugin-opener = "2"
 tauri-plugin-single-instance = "2"
+tauri-plugin-global-shortcut = "2"
+tauri-plugin-dialog = "2"
 rodio = "0.20"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 cpal = { version = "0.15" }   
-reqwest = { version = "0.12", default-features = false, features = ["blocking", "rustls-tls"] }
+reqwest = { version = "0.12", default-features = false, features = ["blocking", "rustls-tls", "stream"] }
+futures-util = "0.3"
+dirs = "5"
+lofty = "0.22"
+base64 = "0.22"
 
 ncm-api-rs = "0.1"
 tokio = { version = "1", features = ["rt", "sync"] }   
+tauri-plugin-process = "2.3.1"