🐛 fix(datagrid): 修复筛选字段选择失效

- 将 Select 下拉选项识别为交互目标
- 避免页内查找焦点逻辑中断字段选择
- 补充下拉选项交互目标回归测试

frontend/src/utils/shortcuts.test.ts

@@ -18,6 +18,7 @@ import {
   getShortcutDisplayLabel,
   getShortcutPrimaryModifierDisplayLabel,
   installGlobalImeCompositionTracking,
+  isEditableElement,
   isGlobalImeCompositionActive,
   isGlobalShortcutCaptureActive,
   isImeComposingKeyEvent,
@@ -39,6 +40,33 @@ beforeEach(() => {
   setGlobalShortcutCaptureActive(false);
 });
 
+describe('editable targets', () => {
+  it('treats Ant Design select dropdown options as interactive targets', () => {
+    const OriginalHTMLElement = globalThis.HTMLElement;
+    class MockHTMLElement {
+      tagName = 'div';
+      isContentEditable = false;
+
+      closest(selector: string) {
+        return selector.includes('.ant-select-dropdown') ? this : null;
+      }
+    }
+    Object.defineProperty(globalThis, 'HTMLElement', {
+      configurable: true,
+      value: MockHTMLElement,
+    });
+
+    try {
+      expect(isEditableElement(new MockHTMLElement() as unknown as EventTarget)).toBe(true);
+    } finally {
+      Object.defineProperty(globalThis, 'HTMLElement', {
+        configurable: true,
+        value: OriginalHTMLElement,
+      });
+    }
+  });
+});
+
 // ─── findReservedConflict ────────────────────────────────────────────
 
 describe('findReservedConflict', () => {

frontend/src/utils/shortcuts.ts

@@ -851,7 +851,7 @@ export const isEditableElement = (target: EventTarget | null): boolean => {
   if (tag === 'input' || tag === 'textarea' || tag === 'select') {
     return true;
   }
-  if (target.closest('.monaco-editor, .monaco-inputbox, .ant-select, .ant-picker, .ant-input')) {
+  if (target.closest('.monaco-editor, .monaco-inputbox, .ant-select, .ant-select-dropdown, .ant-picker, .ant-input')) {
     return true;
   }
   return false;