feat: 新增电商灵感实验室模块，包含AI团队/电商套图/商品视频分类卡片

新增功能：
- 新增电商灵感案例区域（ecom-inspiration-lab），含6个分类标签页（最近打开/一键同款/海报模板/热门/商品图/模特穿戴）
- 新增三个灵感分类行：
  · AI团队：指定ASIN优化listing、TikTok美区爆品分析、竞品分析+全套listing、世界杯属性快闪视频
  · 电商套图：科技礼盒主图、美妆节日套图、防晒产品场景、露营家具详情、香氛A+页面、童装listing组合
  · 商品视频：口播种草短片、香水质感视频、玩具互动短视频、器皿产品展示、饰品模特试戴、包袋生活方式
- 每行卡片支持横向滚动，配备左右箭头按钮控制浏览
- 仅在非完成(status !== 'done')状态下展示灵感区域

样式更新：
- ecommerce-standalone.css 新增灵感实验室全套样式，包括标签页导航、分类行元信息、卡片网格布局、横向滚动条、滚动按钮等组件的视觉设计
- 适配暗色主题变量体系，保持与现有设计系统一致

变更文件：
- src/features/ecommerce/EcommercePage.tsx (+92/-2)
- src/styles/ecommerce-standalone.css (+1136)

src/features/ecommerce/EcommercePage.tsx

@@ -101,6 +101,48 @@ const smartCutoutSizeOptions = [
 type SmartCutoutSizeKey = (typeof smartCutoutSizeOptions)[number]["key"];
 type SmartCutoutImageItem = { src: string; name: string; originalSrc?: string };
 
+const ecommerceInspirationTabs = ["最近打开", "一键同款", "海报模板", "热门", "商品图", "模特穿戴"];
+
+const ecommerceInspirationRows = [
+  {
+    title: "AI团队",
+    desc: "不止作图，更懂转化。",
+    variant: "team",
+    cards: [
+      { title: "指定ASIN，优化listing", meta: "竞品拆解 · 卖点重排 · 图文建议" },
+      { title: "TikTok美区爆品分析", meta: "脚本方向 · 人群洞察 · 素材策略" },
+      { title: "竞品分析 + 全套listing", meta: "关键词 · 主图结构 · 转化建议" },
+      { title: "世界杯属性快闪视频", meta: "热点追踪 · 模板复用 · 15秒短片" },
+    ],
+  },
+  {
+    title: "电商套图",
+    desc: "主图 / 详情图全套一次性生成。",
+    variant: "listing",
+    cards: [
+      { title: "科技礼盒主图", meta: "高反差质感 · 参数卖点" },
+      { title: "美妆节日套图", meta: "促销氛围 · 多规格展示" },
+      { title: "防晒产品场景", meta: "户外光感 · 功效表达" },
+      { title: "露营家具详情", meta: "场景组合 · 尺寸说明" },
+      { title: "香氛A+页面", meta: "材质细节 · 品牌氛围" },
+      { title: "童装listing组合", meta: "多角度 · 人群展示" },
+    ],
+  },
+  {
+    title: "商品视频",
+    desc: "口播模拟 / 商品展示视频 / 社媒短片。",
+    variant: "video",
+    cards: [
+      { title: "口播种草短片", meta: "手持展示 · 真实推荐" },
+      { title: "香水质感视频", meta: "光影旋转 · 高级静物" },
+      { title: "玩具互动短视频", meta: "生活场景 · 情绪表达" },
+      { title: "器皿产品展示", meta: "极简背景 · 材质突出" },
+      { title: "饰品模特试戴", meta: "近景特写 · 搭配建议" },
+      { title: "包袋生活方式", meta: "室内场景 · 组合展示" },
+    ],
+  },
+] as const;
+
 const clampNumber = (value: number, min: number, max: number) => Math.min(max, Math.max(min, value));
 
 const normalizeHexColor = (value: string) => {
@@ -4180,6 +4222,13 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
     handleGenerate();
   };
 
+  const scrollInspirationRow = (event: ReactMouseEvent<HTMLButtonElement>, direction: -1 | 1) => {
+    const row = event.currentTarget.closest(".ecom-inspiration-row");
+    const strip = row?.querySelector<HTMLElement>(".ecom-inspiration-strip");
+    if (!strip) return;
+    strip.scrollBy({ left: direction * Math.max(280, strip.clientWidth * 0.78), behavior: "smooth" });
+  };
+
   const clonePreview = (
     <main className="product-clone-preview clone-ai-preview" data-status={status} aria-label="电商 AI 作图预览" {...getPreviewSurfaceProps()}>
       <header className="clone-ai-preview-header">
@@ -4551,7 +4600,46 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
             ))}
           </section>
         ) : null}
-        <span className="clone-ai-char-count">{requirement.length}/500</span>
+        {status !== "done" ? (
+          <section className="ecom-inspiration-lab" aria-label="电商灵感案例">
+            <nav className="ecom-inspiration-tabs" aria-label="案例分类">
+              {ecommerceInspirationTabs.map((tab, index) => (
+                <button key={tab} type="button" className={index === 3 ? "is-active" : ""}>
+                  {tab}
+                </button>
+              ))}
+            </nav>
+            <div className="ecom-inspiration-rows">
+              {ecommerceInspirationRows.map((row) => (
+                <section key={row.title} className={`ecom-inspiration-row ecom-inspiration-row--${row.variant}`} aria-label={row.title}>
+                  <div className="ecom-inspiration-row__meta">
+                    <strong>{row.title}</strong>
+                    <span>{row.desc}</span>
+                    <div className="ecom-inspiration-row__controls">
+                      <button type="button" aria-label={`向左浏览${row.title}`} onClick={(event) => scrollInspirationRow(event, -1)}>‹</button>
+                      <button type="button" aria-label={`向右浏览${row.title}`} onClick={(event) => scrollInspirationRow(event, 1)}>›</button>
+                    </div>
+                  </div>
+                  <div className="ecom-inspiration-strip" tabIndex={0}>
+                    {row.cards.map((card, index) => (
+                      <article key={card.title} className="ecom-inspiration-card">
+                        <div className="ecom-inspiration-card__visual" aria-hidden="true">
+                          <span />
+                          <span />
+                          <span />
+                          <span />
+                        </div>
+                        <strong>{card.title}</strong>
+                        <p>{card.meta}</p>
+                        <em>{String(index + 1).padStart(2, "0")}</em>
+                      </article>
+                    ))}
+                  </div>
+                </section>
+              ))}
+            </div>
+          </section>
+        ) : null}
       </section>
     </main>
   );
@@ -5919,7 +6007,7 @@ function ProductClonePage(_props: ProductClonePageProps = {}) {
             aria-label={isCommandHistoryCollapsed ? "展开记录" : "收起记录"}
             aria-expanded={!isCommandHistoryCollapsed}
           >
-            {isCommandHistoryCollapsed ? "‹" : "›"}
+            {isCommandHistoryCollapsed ? <MenuUnfoldOutlined /> : <MenuFoldOutlined />}
           </button>
           <button type="button" className="ecom-command-history__new" onClick={handleNewEcommerceConversation}>新对话</button>
           <button