feat: TS 构建管线、Spine 抓取器与 wallpapers/ 唯一真相来源

把项目从「手写 dist/」改成「wallpapers/ 是唯一真相来源，dist/ 由 pnpm build 生成」，
并补上配套的类型、门禁与抓取器。一次提交落地整条管线，因为拆开会留下不能构建的中间态。

- src/：运行时与模拟器源码（TS，strict），编译到 build/ 再拷进各分发
- tools/：build / dev / check-{syntax,paths,dist}，以及抓取器与回归门禁 tools/checks/
  （.scratch/ 下那批一次性脚本移入 tools/checks/ 并入库为长期门禁）
- wallpapers/：七档壁纸的源数据 + README.md（id/音频/预设的完整规范）
- docs/adr/0005-0008：构建管线与分发拓扑、模拟器契约、自包含 sim、每骨架资源布局
- .gitignore：排除 .scratch/ 的参考资料副本（上游 spine 整仓克隆 ~1.2 GB、
  抓取侦查数据 ~680 MB）与调试转储；这些是本地调查材料，补偿会让仓库无法克隆
- 归一化 .gitignore/CONTEXT.md 行尾（工作区 CRLF、索引 LF 造成的整文件假 diff）

同时修掉三档卡住构建的未完工壁纸：
- kv45 的 meta.json 里 id 还是抓取期场景名 scene_main，经 downloader promote 正名为 kv45
- shajin / zhigengniao_juheye 的 meta.json 误用了骨架描述文件（name/spine/animations/pages）、
  且都缺 preset.template.json；现按规范重建：骨架沉到 spines/<名>/（spine-ts 按 atlas 所在
  目录解析贴图页）、补上元数据与单骨架预设，并清掉 zhigengniao 骨架里指向作者机的绝对路径
- 顺带 promote 已在 sources.yml 里的 kv46（月升之前，与兽共舞）

pnpm check 五道门全绿：10 个分发 / 7 档壁纸 / 141 处引用自包含。

wallpapers/hsr/kv45/spines/02_shajin/02_shajin.json

@@ -0,0 +1 @@
+{"skeleton":{"hash":"te5WxXzAmEA","spine":"4.2.43","x":19.65,"y":-740,"width":917.51,"height":1208.06,"images":""},"bones":[{"name":"root","x":-5.6,"y":-90.11,"scaleX":0.443,"scaleY":0.443},{"name":"砂金","parent":"root","x":1108.77,"y":-1892.4},{"name":"腰","parent":"砂金","x":-197.52,"y":1889.4},{"name":"身体","parent":"腰","length":177.5,"rotation":103.3,"x":-2.36,"y":16.84},{"name":"身体3","parent":"身体","length":196.34,"rotation":-8.02,"x":177.5},{"name":"身体2","parent":"身体3","length":275.44,"rotation":14.55,"x":196.34},{"name":"脖子","parent":"身体2","length":100,"rotation":-45.11,"x":275.44},{"name":"头","parent":"脖子","rotation":-2.89,"x":100.08,"y":-0.34},{"name":"前发","parent":"头","length":18.45,"rotation":28.07,"x":313,"y":-52.15},{"name":"眼睛","parent":"前发","rotation":-28.07,"x":-177.9,"y":97.75},{"name":"左眼","parent":"眼睛","x":-15.23,"y":63.38},{"name":"右眼6","parent":"眼睛","x":-9.97,"y":-47.16},{"name":"左眼3","parent":"眼睛","x":-1.59,"y":68.76},{"name":"右眼","parent":"眼睛","x":1.15,"y":-41.2},{"name":"嘴巴","parent":"眼睛","x":-80.88,"y":-6.71},{"name":"头发66","parent":"前发","length":71.9,"rotation":4.91,"x":-108.28,"y":27.5},{"name":"头发67","parent":"头发66","length":55.86,"rotation":148.62,"x":71.9},{"name":"头发68","parent":"头发67","length":56.12,"rotation":12.12,"x":55.86},{"name":"头发76","parent":"头发68","length":43.58,"rotation":-12.12,"x":56.13},{"name":"头发103","parent":"头发76","length":32.54,"rotation":-37.95,"x":43.7,"y":-0.25},{"name":"头发104","parent":"头发103","length":26.42,"rotation":-29.65,"x":32.79,"y":-0.12},{"name":"头发69","parent":"头发67","length":54.66,"rotation":1.47,"x":19.38,"y":-15.1},{"name":"头发70","parent":"头发69","length":47.32,"rotation":10.26,"x":54.66},{"name":"头发77","parent":"头发70","length":46.2,"rotation":20.8,"x":47.32},{"name":"头发108","parent":"头发77","length":25.43,"rotation":27.98,"x":46.2},{"name":"头发71","parent":"头发66","length":52.08,"rotation":161.26,"x":26.12,"y":3.06},{"name":"头发106","parent":"头发71","length":40.89,"rotation":-5.16,"x":52.08},{"name":"头发107","parent":"头发106","length":27.52,"rotation":-15.09,"x":41.35,"y":-0.06},{"name":"头发109","parent":"头发107","length":25.48,"rotation":-18.49,"x":27.52},{"name":"头发72","parent":"头发66","length":52.16,"rotation":144.61,"x":79.8,"y":20.75},{"name":"头发73","parent":"头发72","length":51.94,"rotation":4.31,"x":52.16},{"name":"头发78","parent":"头发73","length":34.57,"rotation":8.28,"x":52.22,"y":-0.09},{"name":"头发105","parent":"头发78","length":23.44,"rotation":24.09,"x":34.57},{"name":"头发59","parent":"前发","length":36.32,"rotation":130.19,"x":-34.87,"y":142.94},{"name":"头发16","parent":"头发59","length":40.69,"rotation":-21.85,"x":36.48,"y":-0.13},{"name":"头发17","parent":"头发16","length":26.74,"rotation":-17.8,"x":41.08,"y":-0.13},{"name":"头发18","parent":"头发17","length":29.53,"rotation":-17.73,"x":27.78,"y":-0.22},{"name":"头发60","parent":"头发59","length":37.73,"rotation":-7.99,"x":13.84,"y":20.3},{"name":"头发19","parent":"前发","length":56.83,"rotation":123.55,"x":-59.96,"y":159.61},{"name":"头发20","parent":"头发19","length":51.61,"rotation":16.8,"x":56.83},{"name":"头发21","parent":"头发20","length":35.59,"rotation":13.63,"x":51.61},{"name":"头发22","parent":"头发21","length":33.38,"rotation":20.37,"x":35.59},{"name":"头发61","parent":"前发","length":62.26,"rotation":127.17,"x":-53.26,"y":150.6},{"name":"头发23","parent":"头发61","length":46,"rotation":38.2,"x":65.12,"y":-0.5},{"name":"头发24","parent":"头发23","length":38.65,"rotation":15.97,"x":47.63,"y":-0.44},{"name":"头发25","parent":"头发24","length":21.8,"rotation":48.81,"x":40.12,"y":0.18},{"name":"头发62","parent":"前发","length":44.9,"rotation":139.81,"x":-72.49,"y":155.41},{"name":"头发64","parent":"头发62","length":39.77,"rotation":23.18,"x":44.9},{"name":"头发65","parent":"头发64","length":28.22,"rotation":19.22,"x":39.97,"y":0.06},{"name":"头发74","parent":"前发","length":71.62,"rotation":-39.82,"x":-115.93,"y":21.45},{"name":"头发75","parent":"头发74","length":67.67,"rotation":-139.91,"x":71.62},{"name":"头发79","parent":"头发75","length":53.02,"rotation":-24.12,"x":67.67},{"name":"头发80","parent":"头发79","length":46.67,"rotation":-11.96,"x":53.02},{"name":"头发26","parent":"前发","length":48.55,"rotation":164.62,"x":-161.82,"y":248.63},{"name":"头发27","parent":"头发26","length":42.13,"rotation":10.64,"x":48.89,"y":0.31},{"name":"头发57","parent":"头发27","length":25.05,"rotation":21.3,"x":42.13},{"name":"后发","parent":"头","length":18.45,"rotation":28.07,"x":371.19,"y":-19.92},{"name":"头发28","parent":"前发","length":60.21,"rotation":177.71,"x":-84.11,"y":241.24},{"name":"头发29","parent":"头发28","length":54.31,"rotation":2.17,"x":60.21}Line truncated