theme(shiroko): 新增平涂极简风肖像素材（透明底）

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按用户给的参考图风格生成三张白子肖像：平涂、零描边、纯黑圆角矩形眼、无嘴、腮红、头部裁边。

- static/images/themes/shiroko/portraits/portrait-{front,tilt,close}.webp（907–1024×921，共 197KB）
- 未接进 --tb-deco，留给用户自行摆位；docs 里写了接入示例与提示词骨架。
- 抠图走"指定纯色底 + 按色值算 alpha"：ImageGen 的 transparent 至今返回无 alpha 的 RGB，
  按白底抠会吃掉白衬衫、也填不到闭合光环内部。

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tamakyi

2026-10-22 19:58:45 +08:00

parent 1addeb56b8

commit ebc4586ef4

5 changed files with 62 additions and 0 deletions

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static/images/themes/shiroko/portraits/portrait-close.webp

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static/images/themes/shiroko/portraits/portrait-front.webp

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static/images/themes/shiroko/portraits/portrait-tilt.webp

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