feat(trash): 商品删除→垃圾桶(软删可恢复)+ 左侧垃圾桶入口

后端(无需迁移,复用 Product.status active/archived):
- destroy 改软删(status→archived);正常列表/详情只看 active
- 新增 /products/trash(列已删)、/products/{id}/restore(恢复)、/{id}/purge(彻底删)
- tests.py:软删/列表隐藏/回收站/恢复/彻底删/拒绝彻底删 active —— 5 测试全过

前端:
- api:productsTrash / restoreProduct / purgeProduct
- 左侧导航加「垃圾桶」(新增 trash 图标);route-config 接 /trash 路由
- 新页 routes/trash.tsx + trash-page.css(仅 token):已删商品列表 + 恢复 + 彻底删(二次确认)
- 删除确认文案「不可撤销」→「移至垃圾桶可恢复」;toast「商品已删除」→「已移至垃圾桶」

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/frontend/src/components/IconKitSvg.tsx

@@ -2,6 +2,7 @@
 
 const iconPaths: Record<string, string> = {
   layoutDashboard: '<rect x="3" y="3" width="7" height="9" rx="1.5"/><rect x="14" y="3" width="7" height="5" rx="1.5"/><rect x="14" y="12" width="7" height="9" rx="1.5"/><rect x="3" y="16" width="7" height="5" rx="1.5"/>',
+  trash: '<path d="M3 6h18"/><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"/><line x1="10" x2="10" y1="11" y2="17"/><line x1="14" x2="14" y1="11" y2="17"/>',
   package: '<path d="M11 21.7a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16V8a2 2 0 0 0-1-1.7l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.7Z"/><path d="m3.3 7 8.7 5 8.7-5"/><path d="M12 22V12"/><path d="m7.5 4.3 9 5.1"/>',
   clapperboard: '<path d="m12.3 3.5 3 4"/><path d="M20.2 6 3 11l-.9-2.4a2 2 0 0 1 1.3-2.5l13.5-4a2 2 0 0 1 2.5 1.3Z"/><path d="m6.2 5.3 3.1 3.9"/><path d="M3 11h18v8a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2Z"/>',
   sparkles: '<path d="M12 3l1.7 4.6L18 9l-4.3 1.4L12 15l-1.7-4.6L6 9l4.3-1.4L12 3Z"/><path d="M19 15l.9 2.1L22 18l-2.1.9L19 21l-.9-2.1L16 18l2.1-.9L19 15Z"/>',

core/frontend/src/components/app-shell.tsx

@@ -195,6 +195,7 @@ const NAV: NavDef[] = [
   { id: "library", page: "library", label: "资产库", icon: "library" },
   { id: "team", page: "team", label: "团队", icon: "users" },
   { id: "account", page: "account", label: "消费", icon: "creditCard" },
+  { id: "trash", page: "trash", label: "垃圾桶", icon: "trash" },
   { id: "settings", page: "settings", label: "设置", icon: "settings" }
 ];