feat: 内测申请弹窗 + 电商功能介绍页样式优化

- 新增 BetaApplicationModal 组件，支持文本输入、单/多选、签字等交互

- 顶部通知铃铛左侧添加「内测申请」按钮（脉冲动画）

- 电商功能介绍页等比例放大，减少空白，布局更紧凑

- 右侧卡片区域放大，卡片内容清晰可见

src/App.tsx

@@ -183,7 +183,7 @@ function createWorkflowFromResult(payload: WorkbenchResultActionPayload): WebCan
     description: payload.prompt || "从生成结果进入画布继续创作。",
     source: "blank",
     settings: {
-      model: payload.resultType === "video" ? "Seedance 2.0" : "Nano Banana Pro",
+      model: payload.resultType === "video" ? "Seedance 2.0" : "omni-水果 Pro",
       ratio: payload.resultType === "video" ? "16:9" : "1:1",
       duration: payload.resultType === "video" ? "6s" : "0s",
       resolution: payload.resultType === "video" ? "720p" : "2K",
@@ -923,7 +923,7 @@ function App() {
               previewUrl: payload.resultUrl,
               params: payload.resultType === "video"
                 ? { model: "Kling V3 Omni", aspectRatio: "16:9", resolution: "720p", duration: "6s", videoMode: "text-to-video" }
-                : { model: "Nano Banana Pro", aspectRatio: "1:1", imageSize: "2K" },
+                : { model: "omni-水果 Pro", aspectRatio: "1:1", imageSize: "2K" },
               assetRef: payload.resultOssKey ? { url: payload.resultUrl, ossKey: payload.resultOssKey, mediaType: payload.resultType === "video" ? "video/mp4" : "image/png", sourceTaskId: payload.taskId } : undefined,
             },
           ];