fix(core): 测试清单 行4-15 — 记住我7天/工作台布局/商品创建选择弹窗/上传图持久化/清空筛选

- 记住我7天:勾选才持久化token+预填用户名,7天过期强制重登(localStorage vs sessionStorage)
- 工作台:最近项目进度/状态列对齐、快捷&提示卡片圆角边框、余额按钮金额左对齐
- 商品创建成功改为复用弹窗,选择 继续创建/去新建项目;主图随创建上传持久化
- 商品卡显示真实主图、点视频进详情视频项目tab
- 商品库/视频项目补 清空筛选 按钮

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

core/frontend/src/api.ts

@@ -23,6 +23,28 @@ import type {
 
 const API_BASE = import.meta.env.VITE_API_BASE_URL || "";
 const TOKEN_KEY = "airshelf_token";
+const REMEMBER_KEY = "airshelf_remember"; // { username, expireAt } · 勾选「记住我 7 天」时写
+const REMEMBER_DAYS = 7;
+
+export type RememberInfo = { username: string; expireAt: number };
+
+export function getRemember(): RememberInfo | null {
+  try {
+    const raw = localStorage.getItem(REMEMBER_KEY);
+    return raw ? (JSON.parse(raw) as RememberInfo) : null;
+  } catch {
+    return null;
+  }
+}
+
+// 登录成功后调用:勾选记住我则存用户名 + 7 天过期点;否则清除
+export function setRemember(username: string | null, remember: boolean) {
+  if (remember && username) {
+    localStorage.setItem(REMEMBER_KEY, JSON.stringify({ username, expireAt: Date.now() + REMEMBER_DAYS * 86400000 }));
+  } else {
+    localStorage.removeItem(REMEMBER_KEY);
+  }
+}
 
 export class ApiError extends Error {
   status: number;
@@ -35,12 +57,24 @@ export class ApiError extends Error {
 }
 
 export function getToken() {
-  return localStorage.getItem(TOKEN_KEY);
+  // 「记住我 7 天」过期则强制重新登录
+  const remembered = getRemember();
+  if (remembered && remembered.expireAt && Date.now() > remembered.expireAt) {
+    localStorage.removeItem(TOKEN_KEY);
+    sessionStorage.removeItem(TOKEN_KEY);
+    localStorage.removeItem(REMEMBER_KEY);
+    return null;
+  }
+  // 记住我 → localStorage(跨会话);不记住 → sessionStorage(关浏览器即失效)
+  return localStorage.getItem(TOKEN_KEY) || sessionStorage.getItem(TOKEN_KEY);
 }
 
-export function setToken(token: string | null) {
-  if (token) localStorage.setItem(TOKEN_KEY, token);
-  else localStorage.removeItem(TOKEN_KEY);
+export function setToken(token: string | null, remember = true) {
+  localStorage.removeItem(TOKEN_KEY);
+  sessionStorage.removeItem(TOKEN_KEY);
+  if (!token) return;
+  if (remember) localStorage.setItem(TOKEN_KEY, token);
+  else sessionStorage.setItem(TOKEN_KEY, token);
 }
 
 async function request<T>(path: string, options: RequestInit = {}): Promise<T> {