refactor: 设计系统完整提取为 @stack/design-system 共享包（组件/tokens/类型唯一定义处，双端引用不再拷贝）

- 组件参数化适配双端：MemphisCard href/morph，EntryGuide 数据注入+linkChapter
- RouteLine hover 跟随（站点 translateY(-3)、连线 CSS d 平滑插值、直线变斜线）随包回到 design-lab，shelf 场景接线演示
- tokens.css 显式 @source 包内源码——经 node_modules 解析时自动扫描漏类（text-mute 等静默丢失致 4% 画面偏差，已修复并验证）
- E2E 新增 hover 跟随契约（静置 L 水平、hover 变斜线、双站点 -3px、卡片同步），28/28 全绿

apps/design-lab/src/pages/shelf/App.tsx

@@ -1,13 +1,15 @@
 /** 组合场景＝大部分组件拿出来的真实使用，不做解释性标注：
  * 入口画像 → 课程卡与关系线 → 进度票券 → 指派块；形状散落于卡片附近空当。 */
 import { Page } from '../../lib/ui'
-import { ASSIGNMENT, CHAPTERS, EDGES } from '../../lib/chapters'
-import { MemphisCard } from '../../components/MemphisCard'
-import { RouteLine } from '../../components/RouteLine'
-import { AssignBlock, Ticket } from '../../components/Ticket'
-import { EntryGuide } from '../../components/EntryGuide'
-import { Scatter } from '../../components/Scatter'
-import { Cross, Ring, Tremble, Tri, Wave } from '../../components/shapes'
+import { ASSIGNMENT, CHAPTERS, EDGES, PROFILES } from '../../lib/chapters'
+import { useState } from 'react'
+import type { ChapterId } from '@stack/design-system'
+import { MemphisCard } from '@stack/design-system'
+import { RouteLine } from '@stack/design-system'
+import { AssignBlock, Ticket } from '@stack/design-system'
+import { EntryGuide } from '@stack/design-system'
+import { Scatter } from '@stack/design-system'
+import { Cross, Ring, Tremble, Tri, Wave } from '@stack/design-system'
 
 /* 场景坐标（节点＝卡描边真实边缘）：卡1(40,110,250) 卡2(380,44,250,rot) 卡3(700,44,140) */
 const nodes = {
@@ -17,13 +19,14 @@ const nodes = {
 } as const
 
 export function App() {
+  const [hovered, setHovered] = useState<ChapterId | null>(null)
   return (
     <Page
       tag="<Examples />"
       title="样例 · 组合场景"
-      desc="大部分组件同台真实使用：入口画像 → 课程卡与关系线 → 进度票券 → 指派块；形状散落于卡片附近空当。"
+      desc="大部分组件同台真实使用：入口画像 → 课程卡与关系线 → 进度票券 → 指派块；hover 卡片，线与站点跟随浮起；形状散落于卡片附近空当。"
     >
-      <EntryGuide />
+      <EntryGuide chapters={CHAPTERS} profiles={PROFILES} />
       <div className="relative mt-8 h-[600px] overflow-hidden rounded-2xl bg-paper">
         <Scatter
           shapes={[
@@ -35,10 +38,28 @@ export function App() {
             <Tremble size={20} key="tremble" />,
           ]}
         />
-        <RouteLine edges={EDGES} nodes={nodes} width={1160} height={600} />
-        <div className="absolute left-[40px] top-[110px] w-[250px]"><MemphisCard chapter={CHAPTERS[1]} entry={1} /></div>
-        <div className="absolute left-[380px] top-[44px] w-[250px] -rotate-1"><MemphisCard chapter={CHAPTERS[2]} entry={2} /></div>
-        <div className="absolute left-[700px] top-[44px] w-[140px]"><MemphisCard chapter={CHAPTERS[5]} compact /></div>
+        <RouteLine edges={EDGES} nodes={nodes} width={1160} height={600} hovered={hovered} />
+        <div
+          className="absolute left-[40px] top-[110px] w-[250px]"
+          onMouseEnter={() => setHovered(1)}
+          onMouseLeave={() => setHovered(null)}
+        >
+          <MemphisCard chapter={CHAPTERS[1]} entry={1} />
+        </div>
+        <div
+          className="absolute left-[380px] top-[44px] w-[250px] -rotate-1"
+          onMouseEnter={() => setHovered(2)}
+          onMouseLeave={() => setHovered(null)}
+        >
+          <MemphisCard chapter={CHAPTERS[2]} entry={2} />
+        </div>
+        <div
+          className="absolute left-[700px] top-[44px] w-[140px]"
+          onMouseEnter={() => setHovered(5)}
+          onMouseLeave={() => setHovered(null)}
+        >
+          <MemphisCard chapter={CHAPTERS[5]} compact />
+        </div>
         <div className="absolute left-[860px] top-[320px]"><AssignBlock {...ASSIGNMENT} /></div>
         <div className="absolute left-[60px] top-[440px] flex gap-4">
           <Ticket chapter={CHAPTERS[2]} done />