diff --git a/apps/ai-game-creator-shell/src/view/ui-editor/components/Inspector/Transform/TransformEditor.tsx b/apps/ai-game-creator-shell/src/view/ui-editor/components/Inspector/Transform/TransformEditor.tsx
index a1e8e5cd9..20dc6f4bd 100644
--- a/apps/ai-game-creator-shell/src/view/ui-editor/components/Inspector/Transform/TransformEditor.tsx
+++ b/apps/ai-game-creator-shell/src/view/ui-editor/components/Inspector/Transform/TransformEditor.tsx
@@ -473,6 +473,9 @@ function DirectionButton({
       disabled={disabled}
       className="grid size-8 place-items-center rounded-lg border border-(--platform-subpanel-border) bg-white/70 text-(--platform-text-soft) transition hover:border-orange-300 hover:bg-orange-50 hover:text-orange-700 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-orange-200 disabled:cursor-default disabled:opacity-40"
       onPointerDown={(event) => {
+        if (event.button !== 0) {
+          return;
+        }
         event.preventDefault();
         startRepeating(event.shiftKey ? 10 : 1);
       }}
diff --git a/apps/ai-game-creator-shell/tests/TransformEditor.test.tsx b/apps/ai-game-creator-shell/tests/TransformEditor.test.tsx
index f672a9068..9145db48b 100644
--- a/apps/ai-game-creator-shell/tests/TransformEditor.test.tsx
+++ b/apps/ai-game-creator-shell/tests/TransformEditor.test.tsx
@@ -13,6 +13,12 @@ const transform: Transform = {
   offset_max: [30, 40],
 };
 
+function firePointerDown(element: HTMLElement, button: number) {
+  const event = new Event('pointerdown', { bubbles: true });
+  Object.defineProperty(event, 'button', { value: button });
+  fireEvent(element, event);
+}
+
 function renderEditor(onChange = vi.fn()) {
   return {
     onChange,
@@ -84,7 +90,7 @@ describe('TransformEditor corner offset controls', () => {
     const { onChange } = renderEditor();
     const button = screen.getByRole('button', { name: '左上角向右' });
 
-    fireEvent.pointerDown(button, { button: 0 });
+    firePointerDown(button, 0);
     act(() => {
       vi.advanceTimersByTime(350);
     });
@@ -93,4 +99,17 @@ describe('TransformEditor corner offset controls', () => {
 
     expect(onChange).toHaveBeenCalledTimes(2);
   });
+
+  it('does not start repeating for non-primary pointer buttons', () => {
+    vi.useFakeTimers();
+    const { onChange } = renderEditor();
+    const button = screen.getByRole('button', { name: '左上角向右' });
+
+    firePointerDown(button, 2);
+    act(() => {
+      vi.advanceTimersByTime(350);
+    });
+
+    expect(onChange).not.toHaveBeenCalled();
+  });
 });