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/features/canvas/canvasConstants.ts

@@ -58,13 +58,13 @@ export const defaultTextModelId = textModelOptions[0].id;
 
 // --- Image model options ---
 export const imageModelOptions: CanvasOption[] = [
-  { value: "wan2.7-image", label: "wan 2.7 · 0.20 积分" },
-  { value: "wan2.7-image-pro", label: "wan 2.7 Pro · 0.20 积分" },
-  { value: "gpt-image-2", label: "GPT-Image-2 · 0.20 积分" },
-  { value: "gpt-image-2-vip", label: "GPT-Image-2 VIP · 0.20 积分" },
-  { value: "nano-banana-pro", label: "Nano Banana Pro · 0.20 积分" },
-  { value: "nano-banana-2", label: "Nano Banana 2 · 0.20 积分" },
-  { value: "nano-banana-fast", label: "Nano Banana · 0.20 积分" },
+  { value: "wan2.7-image", label: "wan 2.7" },
+  { value: "wan2.7-image-pro", label: "wan 2.7 Pro" },
+  { value: "gpt-image-2", label: "omni-GPT" },
+  { value: "gpt-image-2-vip", label: "omni-GPT VIP" },
+  { value: "nano-banana-pro", label: "omni-水果 Pro" },
+  { value: "nano-banana-2", label: "omni-水果 2" },
+  { value: "nano-banana-fast", label: "omni-水果" },
 ];
 
 export const imageRatioOptions: CanvasOption[] = [