抽取内联选项按钮原语

新增 PlatformInlineOptionButton，统一承接当前选项加下拉箭头的轻量按钮 chrome。

编辑器生成输入框的比例和模型按钮改为复用平台内联选项按钮。

补充原语测试和编辑器共享样式断言，并更新 TRACKING。

src/components/image-editor/ImageCanvasEditorView.test.tsx

@@ -742,8 +742,16 @@ describe('ImageCanvasEditorView', () => {
     expect(generatePrompt.className).toContain(
       'image-canvas-editor__generation-prompt',
     );
-    expect(within(generateDialog).getByRole('button', { name: '生成比例 1:1 2k 1张' })).toBeTruthy();
-    expect(within(generateDialog).getByRole('button', { name: '生成模型 GPT Image' })).toBeTruthy();
+    expect(
+      within(generateDialog).getByRole('button', {
+        name: '生成比例 1:1 2k 1张',
+      }).className,
+    ).toContain('platform-inline-option-button');
+    expect(
+      within(generateDialog).getByRole('button', {
+        name: '生成模型 GPT Image',
+      }).className,
+    ).toContain('platform-inline-option-button');
     expect(within(generateDialog).getByRole('button', { name: '生成' }).className).toContain(
       'platform-button',
     );

src/components/image-editor/ImageCanvasEditorView.tsx

@@ -70,6 +70,7 @@ import {
   PlatformFloatingMenuItem,
 } from '../common/PlatformFloatingMenu';
 import { PlatformIconButton } from '../common/PlatformIconButton';
+import { PlatformInlineOptionButton } from '../common/PlatformInlineOptionButton';
 import { PlatformStatusMessage } from '../common/PlatformStatusMessage';
 import { PlatformTextField } from '../common/PlatformTextField';
 import { UnifiedModal } from '../common/UnifiedModal';
@@ -2816,26 +2817,24 @@ export function ImageCanvasEditorView() {
                 }
               />
               <div className="image-canvas-editor__generation-composer-footer">
-                <button
-                  type="button"
+                <PlatformInlineOptionButton
                   className="image-canvas-editor__generation-ratio"
                   aria-label="生成比例 1:1 2k 1张"
                   disabled={generateDialog.status === 'generating'}
                   onClick={() => triggerPlaceholderAction('生成参数')}
+                  trailingIcon={<ChevronDown className="h-3 w-3" />}
                 >
                   中 · 1:1(2k) · 1张
-                  <ChevronDown className="h-3 w-3" />
-                </button>
-                <button
-                  type="button"
+                </PlatformInlineOptionButton>
+                <PlatformInlineOptionButton
                   className="image-canvas-editor__generation-model"
                   aria-label="生成模型 GPT Image"
                   disabled={generateDialog.status === 'generating'}
                   onClick={() => triggerPlaceholderAction('模型选择')}
+                  trailingIcon={<ChevronDown className="h-3 w-3" />}
                 >
                   GPT Im...
-                  <ChevronDown className="h-3 w-3" />
-                </button>
+                </PlatformInlineOptionButton>
                 <PlatformActionButton
                   type="submit"
                   tone="secondary"