修复资源画布播放控件缩放越界

将资源卡音视频播放控件的缩放原点固定到右下角。

增加播放控件缩放原点的样式回归断言。

apps/ai-game-creator-shell/src/styles.css

@@ -5979,7 +5979,7 @@ iframe.preview-frame {
 
 .game-resource-card-media-control {
   transform: scale(var(--genarrative-image-canvas-inverse-scale, 1));
-  transform-origin: center;
+  transform-origin: bottom right;
 }
 
 .game-resource-card-placeholder > svg *,

apps/ai-game-creator-shell/tests/appSurface/project-development.suite.ts

@@ -1986,6 +1986,9 @@ export function registerProjectWorkbenchFoundationTests() {
     expect(styles).toMatch(
       /\.game-resource-card-open\s*\{[^}]*cursor:\s*pointer[^}]*touch-action:\s*manipulation/s,
     );
+    expect(styles).toMatch(
+      /\.game-resource-card-media-control\s*\{[^}]*transform:\s*scale\(var\(--genarrative-image-canvas-inverse-scale,\s*1\)\)[^}]*transform-origin:\s*bottom\s+right/s,
+    );
     expect(styles).toMatch(
       /\.game-resource-canvas\s*\{[^}]*user-select:\s*none/s,
     );