feat: 声匣 —— 网易云 / QQ 音乐自托管下载服务

由 163-music-dl CLI 重构为 Web 服务：
- 下载流水线、歌词与标签逻辑沿用旧版（node-id3 / ffmpeg）
- 网易云（chksz 接口 + music.163.com 元数据）与 QQ 音乐（VIP Cookie）provider
- QQ 扫码登录与 musickey 自动续期
- SQLite 持久化的下载队列，SSE 实时进度
- 曲库工具（M3U / ZIP / 回收站 / 补全标签）、历史统计与导出、访问密码
- Vite 8 + Vue 3 前端，浅色 / 深色
- Docker 部署配置（飞牛 NAS）

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -0,0 +1,40 @@
+{
+  "name": "shengxia",
+  "version": "0.1.0",
+  "private": true,
+  "description": "声匣 · 网易云 / QQ 音乐自托管下载服务",
+  "type": "module",
+  "engines": {
+    "node": ">=22.18"
+  },
+  "scripts": {
+    "dev": "node scripts/dev.mjs",
+    "dev:server": "node --watch --disable-warning=ExperimentalWarning server/src/main.ts",
+    "dev:web": "vite",
+    "build": "vite build",
+    "start": "node --disable-warning=ExperimentalWarning server/src/main.ts",
+    "typecheck": "tsc -p tsconfig.json && vue-tsc -p web/tsconfig.json",
+    "smoke": "node --disable-warning=ExperimentalWarning server/scripts/smoke.ts"
+  },
+  "dependencies": {
+    "@koa/bodyparser": "^6.1.0",
+    "@koa/router": "^15.7.0",
+    "koa": "^3.2.1",
+    "koa-static": "^5.0.0",
+    "node-id3": "^0.2.9",
+    "yazl": "^3.3.1"
+  },
+  "devDependencies": {
+    "@types/koa": "^3.0.3",
+    "@types/koa-static": "^4.0.4",
+    "@types/node": "^24.19.2",
+    "@types/yazl": "^3.3.1",
+    "@vitejs/plugin-vue": "^6.0.10",
+    "@vue/tsconfig": "^0.9.1",
+    "typescript": "^6.0.3",
+    "vite": "^8.3.4",
+    "vue": "^3.5.43",
+    "vue-router": "^5.4.0",
+    "vue-tsc": "^3.3.12"
+  }
+}