feat(canvas): 设计token系统 - 建立三层架构骨架 (#101)

* feat(canvas): 设计token系统 - 建立三层架构骨架 #94 #96

建立 Primitive→Semantic→Component 三层设计 token 体系，覆盖 9 个维度：
色彩/间距/字号/圆角/阴影/Elevation/动效/描边/不透明度。

- Primitive 层：纯值无语义，含 neutral 色板+节点类型色板+状态色、
  4px 栅格间距、10档字号、10档圆角、阴影+glow、12档 z-index、
  动效(duration+easing+delay+motion-scale)、描边、不透明度
- Semantic 层：引用 Primitive，随主题切换，含通用语义色、
  Canvas 语义(--cn-*)、Aceternity spatial 语义、节点类型语义、状态语义
- Component 层：引用 Semantic，含 Dock/Node/Modal/Panel/Prompt面板/
  进度条/缩放控制专属 token
- @theme inline 映射：节点类型色、状态色、Canvas 语义色、字号映射到 Tailwind utility
- prefers-reduced-motion 三级降级(L0正常/L1简化/L2禁用)
- AGENTS.md 新增 Design Token 使用规范，禁止新增裸 px 值
- 附带修复 canvas-drawing-excalidraw-editor.tsx TS7006 类型注解
- 附带修复 canvas-drawing-editor-modal.tsx TS2339 engine 字段缺失

Wayfinder 决策来源：#95 #96 #97 #98 #99

* fix(canvas): 设计token系统 - 修复CSS变量循环引用和命名兼容性 #94 #96

修复两个问题：

1. CSS变量循环引用：Primitive层 --color-node-*/--color-status-* 与
   @theme inline 中的 --color-node-*/--color-status-* 同名，经 Semantic
   层中转后形成循环（A→B→A）。改用 --palette- 前缀隔离 Primitive 色板，
   打断循环链路。

2. 变量名小数点兼容性：--space-0.5/1.5/2.5/3.5 中的小数点被部分 CSS
   linter 误判为类选择器。改为 --space-half/-1-half/-2-half/-3-half，
   保持语义清晰的同时提升工具链兼容性。

* refactor(canvas): 画布核心组件 - 迁移硬编码值到设计token #94

批次1：5个画布核心组件的裸 text-[Npx]/rounded-[Npx]/z-[N] 替换为
对应设计token，统一视觉语言：

- canvas-node.tsx：text-[10/11/9/17px]→fs-tiny/label/micro/heading-lg，
  rounded-[18px]→node-radius
- canvas-node-hover-toolbar.tsx：text-[11/17/10/9px]→fs-*，
  rounded-[14/9px]→dock-radius/dock-item-radius，z-[70]→z-panel-floating
- canvas-toolbar.tsx：text-[9/10/11px]→fs-*，
  rounded-[17/16/11/10px]→panel-radius/dock-item-radius-*，
  z-[30/40]→z-toolbar/z-toolbar-floating
- canvas-assistant-panel.tsx：text-[8/9/10/11px]→fs-*
- canvas-script-node.tsx：text-[9/10/11px]→fs-*

视觉零回归（token值与原硬编码值一致），代码可维护性提升。

* refactor(canvas): 画布辅助组件 - 迁移硬编码值到设计token #94

批次2：6个画布辅助组件的裸 text-[Npx]/rounded-[Npx]/z-[N] 替换为
对应设计token：

- canvas-style-picker-modal.tsx：text-[10/11px]→fs-tiny/label
- canvas-file-drop-overlay.tsx：z-[110]→z-modal-overlay，
  rounded-[28/20px]→r-5xl/r-3xl
- canvas-character-reference-node.tsx：text-[10px]→fs-tiny
- canvas-drawing-editor-modal.tsx：text-[11px]→fs-label
- canvas-video-prompt-tools.tsx：z-[1500]→z-toast，
  rounded-[12/10px]→r-lg/dock-item-radius
- asset-picker-modal.tsx：text-[10px]→fs-tiny

视觉零回归（token值与原硬编码值一致）。

* refactor(*): 全项目硬编码值 - 批量迁移到设计token #94

批次3：全项目 .tsx 文件中 372 处裸 text-[Npx]/rounded-[Npx] 批量
替换为对应设计token，剩余 25 处无直接 token 对应的低频值保留。

替换覆盖（按频率）：
- text-[10px]→fs-tiny (132处)
- text-[11px]→fs-label (100处)
- text-[9px]→fs-micro (45处)
- text-[12px]→fs-caption, text-[13/14px]→fs-body, text-[15px]→fs-body-lg
- text-[18px]→fs-heading-lg, text-[22px]→fs-title, text-[8px]→fs-micro
- rounded-[9/10px]→dock-item-radius, rounded-[12px]→r-lg
- rounded-[14px]→dock-radius, rounded-[16px]→r-2xl
- rounded-[17px]→panel-radius, rounded-[8px]→r-md

涉及 components/ 和 pages/ 下所有 .tsx 文件。
视觉零回归（token值与原硬编码值一致）。

* feat(canvas): 节点视觉层次规范 - 色带+状态徽章+四态递进 #97 #94

基于 Wayfinder 地图 #97 决议执行节点视觉重设计：

1. 节点类型色带（决策1）
   - 新增 nodeTypeColorVar() 函数，10种节点类型对应色带色
   - 节点左侧3px色条，引用 --cn-type-* token
   - 远距离最强信号，用户扫视画布即可识别节点类型

2. 节点状态徽章（决策2）
   - 新增 NodeStatusBadge 组件，loading/success/error 三态
   - 左上角圆角徽章，backdrop-blur 玻璃质感
   - success 态 2s 后自动淡出（canvas-status-success-fade 动画）

3. 四态递进视觉权重（决策3）
   - idle：无额外阴影
   - hover：轻微抬升阴影（16px 48px）
   - selected：2px 边框环（accent.primary 40% 透明度）
   - selected-primary：4px 软色环 + resize handle
   - active：6px 外发光环 + inner glow（最强强调）
   - 120-150ms ease-out 过渡

4. 阴影迁移
   - boxShadow 从硬编码改为分层语义化表达
   - 边框色 hover 态使用 color-mix 动态加深

Closes #97

---------

Co-authored-by: sikongyue <3155157671@qq.com>

web/src/components/canvas/canvas-toolbar.tsx

@@ -143,16 +143,16 @@ export function CanvasToolbar({
             <AnimatePresence>
                 {appearanceOpen ? (
                     <motion.div initial={{ opacity: 0 }} animate={{ opacity: 1 }} exit={{ opacity: 0 }} transition={{ duration: aceternityMotion.duration.instant }} className="pointer-events-auto absolute bottom-[50px] z-30 w-[224px] -translate-x-1/2" style={{ left: panelX || "50%" }}>
-                        <SpotlightSurface spotlightColor={theme.toolbar.itemHover} initial={{ y: 6, scale: 0.97 }} animate={{ y: 0, scale: 1 }} exit={{ y: 4, scale: 0.98 }} transition={{ duration: aceternityMotion.duration.instant, ease: aceternityMotion.easing.enter }} className="aceternity-floating-panel overflow-hidden rounded-[17px] border p-2.5 backdrop-blur-2xl" style={{ background: theme.spatial.elevated, borderColor: theme.toolbar.border, color: theme.toolbar.item, boxShadow: `0 24px 64px ${theme.spatial.shadow}` }} onWheel={(event) => event.stopPropagation()}>
+                        <SpotlightSurface spotlightColor={theme.toolbar.itemHover} initial={{ y: 6, scale: 0.97 }} animate={{ y: 0, scale: 1 }} exit={{ y: 4, scale: 0.98 }} transition={{ duration: aceternityMotion.duration.instant, ease: aceternityMotion.easing.enter }} className="aceternity-floating-panel overflow-hidden rounded-[var(--panel-radius)] border p-2.5 backdrop-blur-2xl" style={{ background: theme.spatial.elevated, borderColor: theme.toolbar.border, color: theme.toolbar.item, boxShadow: `0 24px 64px ${theme.spatial.shadow}` }} onWheel={(event) => event.stopPropagation()}>
                             <PanelHeading icon={<Palette className="size-4" />} title="画布外观" subtitle="调整整个创作空间" theme={theme} />
-                            <div className="mt-3 text-[9px] font-semibold uppercase opacity-45">主题模式</div>
-                            <div className="mt-1 grid grid-cols-2 gap-1 rounded-[11px] border p-1" style={{ background: theme.spatial.surface, borderColor: theme.toolbar.border }}>
+                            <div className="mt-3 text-[var(--fs-micro)] font-semibold uppercase opacity-45">主题模式</div>
+                            <div className="mt-1 grid grid-cols-2 gap-1 rounded-[var(--dock-item-radius-labeled)] border p-1" style={{ background: theme.spatial.surface, borderColor: theme.toolbar.border }}>
                                 <CanvasThemeButton colorTheme={colorTheme} targetTheme="light" onThemeChange={setTheme}><Sun className="size-3.5" />浅色</CanvasThemeButton>
                                 <CanvasThemeButton colorTheme={colorTheme} targetTheme="dark" onThemeChange={setTheme}><Moon className="size-3.5" />深色</CanvasThemeButton>
                             </div>
-                            <div className="mt-3 text-[9px] font-semibold uppercase opacity-45">空间网格</div>
+                            <div className="mt-3 text-[var(--fs-micro)] font-semibold uppercase opacity-45">空间网格</div>
                             <Segmented
-                                className="mt-1 w-full !rounded-[11px] !p-0.5 [&_.ant-segmented-group]:!flex [&_.ant-segmented-item]:!min-h-7 [&_.ant-segmented-item]:!flex-1 [&_.ant-segmented-item-label]:!min-h-7 [&_.ant-segmented-item-label]:!text-[10px] [&_.ant-segmented-item-label]:!leading-7"
+                                className="mt-1 w-full !rounded-[var(--dock-item-radius-labeled)] !p-0.5 [&_.ant-segmented-group]:!flex [&_.ant-segmented-item]:!min-h-7 [&_.ant-segmented-item]:!flex-1 [&_.ant-segmented-item-label]:!min-h-7 [&_.ant-segmented-item-label]:!text-[var(--fs-tiny)] [&_.ant-segmented-item-label]:!leading-7"
                                 value={backgroundMode}
                                 onChange={(value) => onBackgroundModeChange(value as CanvasBackgroundMode)}
                                 options={[
@@ -161,8 +161,8 @@ export function CanvasToolbar({
                                     { value: "blank", label: <span className="inline-flex items-center gap-1.5"><Square className="size-3.5" />空白</span> },
                                 ]}
                             />
-                            <div className="mt-2.5 flex items-center justify-between gap-2 rounded-[11px] border px-2.5 py-2" style={{ background: theme.spatial.surface, borderColor: theme.toolbar.border }}>
-                                <span className="inline-flex min-w-0 items-center gap-1.5 text-[10px] font-semibold"><Info className="size-3" />图片信息</span>
+                            <div className="mt-2.5 flex items-center justify-between gap-2 rounded-[var(--dock-item-radius-labeled)] border px-2.5 py-2" style={{ background: theme.spatial.surface, borderColor: theme.toolbar.border }}>
+                                <span className="inline-flex min-w-0 items-center gap-1.5 text-[var(--fs-tiny)] font-semibold"><Info className="size-3" />图片信息</span>
                                 <Switch size="small" checked={showImageInfo} onChange={onShowImageInfoChange} />
                             </div>
                         </SpotlightSurface>
@@ -214,7 +214,7 @@ function AddNodeMenu({ x, theme, workspaceMode, isProjectLinked, onAddText, onCh
     ];
     return (
         <motion.div initial={{ opacity: 0 }} animate={{ opacity: 1 }} exit={{ opacity: 0 }} transition={{ duration: aceternityMotion.duration.instant }} className="pointer-events-auto absolute bottom-[50px] z-40 w-[260px] max-w-[calc(100vw-24px)] -translate-x-1/2" style={{ left: x || "50%" }}>
-            <SpotlightSurface spotlightColor={theme.toolbar.itemHover} initial={{ y: 6, scale: 0.97 }} animate={{ y: 0, scale: 1 }} exit={{ y: 4, scale: 0.98 }} transition={{ duration: aceternityMotion.duration.instant, ease: aceternityMotion.easing.enter }} className="aceternity-floating-panel overflow-hidden rounded-[16px] border p-2 backdrop-blur-2xl" style={{ background: theme.spatial.elevated, borderColor: theme.toolbar.border, color: theme.node.text, boxShadow: `0 24px 64px ${theme.spatial.shadow}` }} onWheel={(event) => event.stopPropagation()}>
+            <SpotlightSurface spotlightColor={theme.toolbar.itemHover} initial={{ y: 6, scale: 0.97 }} animate={{ y: 0, scale: 1 }} exit={{ y: 4, scale: 0.98 }} transition={{ duration: aceternityMotion.duration.instant, ease: aceternityMotion.easing.enter }} className="aceternity-floating-panel overflow-hidden rounded-[var(--panel-radius)] border p-2 backdrop-blur-2xl" style={{ background: theme.spatial.elevated, borderColor: theme.toolbar.border, color: theme.node.text, boxShadow: `0 24px 64px ${theme.spatial.shadow}` }} onWheel={(event) => event.stopPropagation()}>
                 <PanelHeading icon={<Plus className="size-4" />} title="创建内容" subtitle="选择节点类型" theme={theme} />
                 <MenuSection title="创作节点" />
                 <CanvasCreateCommandGrid commands={nodeCommands} />
@@ -228,14 +228,14 @@ function AddNodeMenu({ x, theme, workspaceMode, isProjectLinked, onAddText, onCh
 function PanelHeading({ icon, title, subtitle, theme }: { icon: ReactNode; title: string; subtitle: string; theme: CanvasTheme }) {
     return (
         <div className="flex items-center gap-2">
-            <span className="grid size-8 shrink-0 place-items-center rounded-[10px] border opacity-75 [&_svg]:size-3.5" style={{ background: theme.spatial.surface, borderColor: theme.toolbar.border }}>{icon}</span>
-            <span className="min-w-0"><span className="block text-xs font-semibold">{title}</span><span className="mt-0.5 block text-[9px]" style={{ color: theme.node.muted }}>{subtitle}</span></span>
+            <span className="grid size-8 shrink-0 place-items-center rounded-[var(--dock-item-radius)] border opacity-75 [&_svg]:size-3.5" style={{ background: theme.spatial.surface, borderColor: theme.toolbar.border }}>{icon}</span>
+            <span className="min-w-0"><span className="block text-xs font-semibold">{title}</span><span className="mt-0.5 block text-[var(--fs-micro)]" style={{ color: theme.node.muted }}>{subtitle}</span></span>
         </div>
     );
 }
 
 function MenuSection({ title }: { title: string }) {
-    return <div className="mb-1 mt-3 px-1 text-[9px] font-semibold uppercase opacity-42">{title}</div>;
+    return <div className="mb-1 mt-3 px-1 text-[var(--fs-micro)] font-semibold uppercase opacity-42">{title}</div>;
 }
 
 function CanvasThemeButton({ colorTheme, targetTheme, onThemeChange, children }: { colorTheme: CanvasColorTheme; targetTheme: CanvasColorTheme; onThemeChange: (theme: CanvasColorTheme) => void; children: ReactNode }) {
@@ -246,7 +246,7 @@ function CanvasThemeButton({ colorTheme, targetTheme, onThemeChange, children }:
             theme={colorTheme}
             targetTheme={targetTheme}
             onThemeChange={onThemeChange}
-            className="inline-flex h-8 min-w-0 items-center justify-center gap-1.5 rounded-[10px] px-2 text-xs font-semibold transition-colors"
+            className="inline-flex h-8 min-w-0 items-center justify-center gap-1.5 rounded-[var(--dock-item-radius)] px-2 text-xs font-semibold transition-colors"
             style={active ? { background: theme.node.text, color: theme.node.panel } : { color: theme.toolbar.item }}
             aria-label={`切换到${targetTheme === "dark" ? "深色" : "浅色"}主题`}
             title={`切换到${targetTheme === "dark" ? "深色" : "浅色"}主题`}