diff --git a/apps/ai-game-creator-shell/tests/TransformEditor.test.tsx b/apps/ai-game-creator-shell/tests/TransformEditor.test.tsx
new file mode 100644
index 000000000..e8b28f0dc
--- /dev/null
+++ b/apps/ai-game-creator-shell/tests/TransformEditor.test.tsx
@@ -0,0 +1,79 @@
+// @vitest-environment jsdom
+
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+
+import type { Transform } from '../src/features/ui-editor/types/Transform';
+import { TransformEditor } from '../src/view/ui-editor/components/Inspector/Transform/TransformEditor';
+
+const transform: Transform = {
+  anchor_min: [0, 0],
+  anchor_max: [1, 1],
+  offset_min: [10, 20],
+  offset_max: [30, 40],
+};
+
+function renderEditor(onChange = vi.fn()) {
+  return {
+    onChange,
+    ...render(<TransformEditor transform={transform} onChange={onChange} />),
+  };
+}
+
+describe('TransformEditor corner offset controls', () => {
+  it('uses one X/Y input pair for the selected corner', () => {
+    renderEditor();
+
+    expect(
+      screen.getByRole('spinbutton', { name: '左上角偏移 X' }),
+    ).toHaveProperty('value', '10');
+    expect(
+      screen.getByRole('spinbutton', { name: '左上角偏移 Y' }),
+    ).toHaveProperty('value', '20');
+    expect(screen.getAllByRole('spinbutton')).toHaveLength(2);
+
+    fireEvent.click(screen.getByRole('button', { name: '右下角' }));
+
+    expect(
+      screen.getByRole('spinbutton', { name: '右下角偏移 X' }),
+    ).toHaveProperty('value', '30');
+    expect(
+      screen.getByRole('spinbutton', { name: '右下角偏移 Y' }),
+    ).toHaveProperty('value', '40');
+  });
+
+  it('writes the selected corner input back to the matching offset component', () => {
+    const { onChange } = renderEditor();
+
+    fireEvent.click(screen.getByRole('button', { name: '右上角' }));
+    const xInput = screen.getByRole('spinbutton', {
+      name: '右上角偏移 X',
+    });
+    fireEvent.change(xInput, { target: { value: '55' } });
+    fireEvent.blur(xInput);
+
+    expect(onChange).toHaveBeenLastCalledWith({
+      ...transform,
+      offset_max: [55, 40],
+    });
+  });
+
+  it('moves only the selected corner with direction keys', () => {
+    const { onChange } = renderEditor();
+
+    fireEvent.click(screen.getByRole('button', { name: '右下角' }));
+    fireEvent.click(screen.getByRole('button', { name: '右下角向左' }));
+    expect(onChange).toHaveBeenLastCalledWith({
+      ...transform,
+      offset_max: [29, 40],
+    });
+
+    fireEvent.click(screen.getByRole('button', { name: '右下角向上' }), {
+      shiftKey: true,
+    });
+    expect(onChange).toHaveBeenLastCalledWith({
+      ...transform,
+      offset_max: [30, 30],
+    });
+  });
+});
diff --git a/docs/technical/【设计】UI编辑器变换角点偏移编辑器-2026-09-03.md b/docs/technical/【设计】UI编辑器变换角点偏移编辑器-2026-09-03.md
index 93d608421..2d7728779 100644
--- a/docs/technical/【设计】UI编辑器变换角点偏移编辑器-2026-09-03.md
+++ b/docs/technical/【设计】UI编辑器变换角点偏移编辑器-2026-09-03.md
@@ -23,7 +23,7 @@
 
 ## 交互
 
-- 组件内部维护当前选中角，默认左上；节点或 `transform` 切换时重置为左上。
+- 组件内部维护当前选中角，首次挂载时默认左上；切换角点由用户控制，编辑过程中不会因 offset 更新而跳回其他角。
 - 四角按钮按左上、右上、左下、右下空间位置排布；当前角高亮并提供可访问名称。
 - 页面只渲染一组 X/Y 数字输入和一组上、下、左、右方向键，二者都只作用于当前选中角。
 - 方向键每次按 `1` 调整对应分量；按住支持连续触发，按住 `Shift` 时步长为 `10`。