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/04_qianjing/04_qianjing.json

@@ -0,0 +1 @@
+{"skeleton":{"hash":"BJKvrripJI0","spine":"4.2.43","x":-1286.37,"y":-837.71,"width":2566.64,"height":1435.91,"images":""},"bones":[{"name":"root","scaleX":0.443,"scaleY":0.443},{"name":"bone","parent":"root","length":448.96,"rotation":28.15,"x":-2909.76,"y":-1396.99},{"name":"bone2","parent":"bone","length":480.38,"rotation":-12,"x":448.96},{"name":"bone3","parent":"bone2","length":476.57,"rotation":-16.76,"x":480.38},{"name":"bone4","parent":"bone3","length":402.99,"rotation":-8.39,"x":473.59,"y":-2.52},{"name":"bone5","parent":"bone4","length":302.46,"rotation":-8.93,"x":402.99},{"name":"bone6","parent":"bone5","length":180.09,"rotation":-11.09,"x":297.89,"y":-4.49},{"name":"bone7","parent":"bone6","length":201.6,"rotation":-18,"x":180.09},{"name":"bone8","parent":"bone7","length":199.59,"rotation":10.47,"x":201.6},{"name":"bone9","parent":"bone8","length":194.22,"rotation":12.62,"x":199.59},{"name":"bone10","parent":"bone9","length":183.73,"rotation":4.98,"x":194.22},{"name":"bone11","parent":"bone10","length":215.07,"rotation":21.99,"x":183.73},{"name":"bone12","parent":"bone11","length":207.49,"rotation":13.38,"x":215.07},{"name":"bone13","parent":"bone12","length":133.37,"rotation":13.16,"x":207.49},{"name":"bone14","parent":"bone13","length":144.91,"rotation":8.18,"x":135.86,"y":-1.41},{"name":"bone15","parent":"root","length":204.18,"rotation":-24.35,"x":-2936.8,"y":187.13},{"name":"bone16","parent":"bone15","length":192.67,"rotation":-4.74,"x":204.18},{"name":"bone17","parent":"bone16","length":169.07,"rotation":-17.86,"x":192.67},{"name":"bone18","parent":"bone17","length":95.51,"rotation":-28.22,"x":169.07},{"name":"bone19","parent":"bone18","length":120.41,"rotation":-75.08,"x":96.13,"y":-2.97},{"name":"bone20","parent":"bone19","length":113.02,"rotation":8.91,"x":120.41},{"name":"bone21","parent":"bone20","length":132.4,"rotation":64.38,"x":113.02},{"name":"bone22","parent":"bone21","length":171.07,"rotation":29.39,"x":132.4},{"name":"bone23","parent":"bone22","length":141.75,"rotation":11.14,"x":171.07},{"name":"bone24","parent":"bone23","length":146.37,"rotation":-0.65,"x":141.75},{"name":"bone25","parent":"bone24","length":120.85,"rotation":9.65,"x":146.37},{"name":"bone26","parent":"root","length":225.41,"rotation":148.8,"x":2904.81,"y":-1103.99},{"name":"bone27","parent":"bone26","length":202.12,"rotation":0.5,"x":225.41},{"name":"bone28","parent":"bone27","length":210.22,"rotation":2.15,"x":202.12},{"name":"bone29","parent":"bone28","length":231.4,"rotation":3.19,"x":210.22},{"name":"bone30","parent":"bone29","length":207.42,"rotation":5.86,"x":231.4},{"name":"bone31","parent":"bone30","length":166.17,"rotation":-3.08,"x":209.98,"y":0.91},{"name":"bone32","parent":"bone31","length":161.03,"rotation":-6.14,"x":166.17},{"name":"bone33","parent":"bone32","length":79.66,"rotation":-90.9,"x":161.03},{"name":"bone34","parent":"bone33","length":137.66,"rotation":-45.52,"x":79.66},{"name":"bone35","parent":"bone34","length":115.08,"rotation":4.43,"x":137.66},{"name":"bone36","parent":"bone35","length":85.98,"rotation":55.14,"x":115.08},{"name":"bone37","parent":"bone36","length":78.35,"rotation":43.47,"x":85.98},{"name":"bone38","parent":"bone37","length":104.93,"rotation":72.54,"x":78.35},{"name":"bone39","parent":"bone38","length":115.8,"rotation":-15.15,"x":106.26,"y":-0.25},{"name":"bone40","parent":"bone39","length":124.95,"rotation":-14.32,"x":115.8},{"name":"bone41","parent":"bone40","length":130.97,"rotation":1.53,"x":124.95},{"name":"bone42","parent":"root","length":173.34,"rotation":-15.59,"x":2253.76,"y":115.11},{"name":"bone43","parent":"bone42","length":128.97,"rotation":-15.86,"x":173.34},{"name":"bone44","parent":"bone43","length":119.48,"rotation":-18.82,"x":128.96},{"name":"bone45","parent":"bone44","length":90.5,"rotation":-23.11,"x":120.47,"y":-0.83},{"name":"bone46","parent":"root","length":67.72,"rotation":144.62,"x":2627.7,"y":-522.66},{"name":"bone47","parent":"bone46","length":45.83,"rotation":-38.4,"x":67.72},{"name":"bone48","parent":"bone47","length":39.36,"rotation":-42.79,"x":45.83},{"name":"bone49","parent":"bone48","length":68.39,"rotation":87.9,"x":39.36},{"name":"bone50","parent":"bone49","length":81.07,"rotation":24.13,"x":68.39},{"name":"bone51","parent":"root","length":19.31,"rotation":84.96,"x":2065.19,"y":-247.94},{"name":"bone52","parent":"root","length":19.31,"rotation":84.96,"x":2001.1,"y":-335.55},{"name":"bone53","parent":"root","length":19.31,"rotation":84.96,"x":1905.38,"y":-240.57},{"name":"bone54","parent":"root","length":79.68,"rotation":122.7,"x":-1768.09,"y":-335.86},{"name":"bone55","parent":"bone54","length":122.41,"rotation":2.39,"x":79.68},{"name":"bone56","parent":"bone55","length":60.35,"rotation":28,"x":122.41},{"name":"bone57","parent":"bone56","length":75.55,"rotation":112.52,"x":60.35},{"name":"bone58","parent":"bone57","length":63.89,"rotation":35.62,"x":75.55},{"name":"bone59","parent":"root","x":-1547.63,"y":117.2},{"name":"bone60","Line truncated