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/routes/route-config.ts

@@ -31,7 +31,8 @@ export type Page =
   | "modelPhotoDemoB"
   | "platformCover"
   | "settings"
-  | "settingsNotify";
+  | "settingsNotify"
+  | "trash";
 
 export type AuthMode = "login" | "register";
 export type ResolvedRoute = {
@@ -89,7 +90,8 @@ export const routeLabels: Record<Page, string> = {
   modelPhotoDemoB: "模特图方案 B",
   platformCover: "平台套图",
   settings: "设置",
-  settingsNotify: "通知设置"
+  settingsNotify: "通知设置",
+  trash: "垃圾桶"
 };
 export const routePages = Object.keys(routeLabels) as Page[];
 
@@ -147,6 +149,7 @@ export function resolveRoute(): ResolvedRoute {
   if (path === "/platform-cover") return { page: "platformCover", authMode: "login", hash };
   if (path === "/settings/notify") return { page: "settingsNotify", authMode: "login", hash };
   if (path === "/settings") return { page: "settings", authMode: "login", hash };
+  if (path === "/trash") return { page: "trash", authMode: "login", hash };
   return { page: "dashboard", authMode: "login", hash };
 }
 
@@ -190,6 +193,8 @@ export function pathForPage(page: Page, options: NavigateOptions = {}) {
       return "/settings/notify";
     case "settings":
       return "/settings";
+    case "trash":
+      return "/trash";
     default:
       return "/dashboard";
   }