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design package
com.atom.lib.design.atomdefault.AtomDefault 提供独立皮肤入口：skin() 使用现有默认外观；skin(AtomDefault.presets().get(i)) 创建使用指定配色的新实例。每个宿主持有自己的 ControlContext、皮肤与 TextService；切换颜色时在该皮肤上调用 updateStyle(palette.controlStyle(radius, halfScreen, cardTint))。原 AtomChatControlSkin(AtomChatControlStyle) 与 design.atomchat API 保留，旧全局 Design.host / Design.rippleSink 仍有全局状态，不应作为多宿主隔离入口；旧入口弃用期限尚未确定。
十二个 AtomDefaultPalette 为不可变值，包含强调、面板、主次文字、卡片、边框色与面板透明度、是否模糊的建议值。配色源自 AtomChat，许可证及文件版本见 来源基线。聊天气泡色、胶囊、业务配置与动作未映射；圆角不跟随预设变化。面板透明度、边框色与模糊票据目前只提供给宿主，皮肤不会自动应用或捕获背景；宿主须明确处理。默认皮肤工厂没有选择任意一套预设。预设皮肤的模态底色跟随面板色，固定旧构造器仍使用旧模态色；其余组件和效果尚未全部主题化。
明暗控件离屏图及隔离测试只是实现证据；字体角色、ripple 的跨宿主完整行为、模态各状态、实际游戏和用户观感仍待验证。
本地候选新增 AtomChatFonts 与 AtomChatControlSkin／AtomChatControlStyle，为可选 Slider／Toggle／ConfirmationDialog 提供 AC 材质。新路径使用实例不可变 style 与显式 UiCards/UiTokens 参数，不安装或临时替换全局 Design.host。
Design.defaultHost()只返回不可变默认值。旧全局路径仍兼容，未由本次声称完成所有旧消费者的多mod改造。见 完整合同。
模态外层限宽与留白由 AtomChatControlSkin.modalDialogStyle(Viewport)提供，UiSession 仅通用居中；非 AC 皮肤可使用自己的尺寸策略。本轮不实现背景模糊，新增模糊讨论文档仅随完整源码快照保留。
com.atom.lib.design.atomchat is an optional layer on top of the render
bridge. It is the look AtomChat ships: frosted cards, 20-unit corner radius,
blue accent, hairline rims. Import it when you want that appearance; skip it
and draw with your own tokens if you do not.
| Class | What it gives you |
|---|---|
UiTokens |
Sizes, radii, shadow constants, colour derivation (cardFill, accentFill, cardHover, onAccent, hairline) |
SkiaDraw |
Rounded rect, chrome shadow, edge highlight, ring, rounded/cover image, blur backdrop, clip, colour lerp |
UiCards |
Card surface, float surface, notification backdrop |
AppIcons |
Icon path data |
The tokens read host state instead of hardcoding one mod's config. Install
Design.host(DesignHost) to supply your corner radius, accent, card tint,
card colour, panel colour, secondary text colour and half-screen state. With
no host installed the defaults are AtomChat's shipped values, so a bare
UiTokens.cardFill() already looks right.
Design.rippleSink(RippleSink) is the optional click-feedback hook;
without one, cards draw and clicks do nothing.
Not included on purpose: layout, motion timing, message bubbles, screen chrome, composers and any screen-level composition. These classes provide tokens and drawing helpers, not widgets; the generic component, overlay and shell layer from earlier extraction rounds has been deleted.