fix: let Escape close only the dialog, not also clear the selection behind it

hooks/__tests__/use-focus-trap.test.tsx

@@ -141,3 +141,19 @@ describe('useFocusTrap', () => {
     expect(screen.getByTestId('panel')).not.toHaveAttribute('tabindex');
   });
 });
+
+describe('useFocusTrap and the page behind', () => {
+  it('keeps an Escape that closed the dialog from the page', () => {
+    const page = vi.fn();
+    document.addEventListener('keydown', page);
+    try {
+      const onEscape = vi.fn();
+      render(<Page open onEscape={onEscape} />);
+      fireEvent.keyDown(screen.getByLabelText('name'), { key: 'Escape' });
+      expect(onEscape).toHaveBeenCalledTimes(1);
+      expect(page).not.toHaveBeenCalled();
+    } finally {
+      document.removeEventListener('keydown', page);
+    }
+  });
+});

hooks/use-focus-trap.ts

@@ -70,7 +70,11 @@ export function useFocusTrap({
     const handleKeyDown = (e: KeyboardEvent) => {
       // Handle Escape
       if (e.key === 'Escape' && onEscapeRef.current) {
-        if (isTopmost()) onEscapeRef.current();
+        if (!isTopmost()) return;
+        // Escape closes the innermost layer only (R8): the page's own
+        // handlers (Files clears its selection) must not see it too.
+        e.stopPropagation();
+        onEscapeRef.current();
         return;
       }