diff --git a/.Jules/palette.md b/.Jules/palette.md
index 7577a1ca7..ec2791de5 100644
--- a/.Jules/palette.md
+++ b/.Jules/palette.md
@@ -56,3 +56,10 @@
 ## 2024-07-14 - Native Keyboard Submission with Forms for Modals
 **Learning:** Modals designed with plain `<div>` elements as wrappers instead of `<form>` lack native keyboard submission support, forcing users to switch from keyboard to mouse to confirm actions like "Save".
 **Action:** When designing modals or popups containing inputs, always use a `<form>` element to wrap the content, handle the `onSubmit` event (calling `e.preventDefault()`), and set the primary confirmation button to `type="submit"` to enable seamless Enter-key submission for keyboard users.
+## 2026-06-30 - Dynamically Disabled Buttons with Explanatory Hints
+**Learning:** Using the native `disabled` attribute on buttons removes them from the tab sequence. This makes it impossible for keyboard or screen reader users to reach the button and discover any attached explanatory hints (like `aria-describedby` explaining why it's disabled).
+**Action:** When a dynamically disabled button provides important contextual hints about its disabled state, use `aria-disabled="true"` instead of the native `disabled` attribute. Ensure visual disabled styling (opacity, cursor) is applied and an `onClick={e => e.preventDefault()}` handler is added to prevent submission while maintaining discoverability in the tab sequence.
+
+## 2026-06-30 - Prevent Default Event Bubbling on Disabled Buttons
+**Learning:** Using `onClick={e => e.preventDefault()}` on an `aria-disabled` button does not prevent the click event from bubbling up the DOM tree in React. Tests mimicking clicks on the disabled button might still trigger parent handlers, causing assertions like `expect(parentHandler).not.toHaveBeenCalled()` to fail.
+**Action:** When creating an `aria-disabled` button and attempting to block activation, use `onClick={e => { e.preventDefault(); e.stopPropagation(); }}` to ensure the event does not bubble up to parent containers.
diff --git a/frontend/src/components/modals/ExportModal.test.tsx b/frontend/src/components/modals/ExportModal.test.tsx
index bd89c5384..8464e0c2f 100644
--- a/frontend/src/components/modals/ExportModal.test.tsx
+++ b/frontend/src/components/modals/ExportModal.test.tsx
@@ -171,13 +171,27 @@ describe('ExportModal', () => {
     expect(screen.getByRole('button', { name: '데이터 사전 Markdown 내보내기' })).toBeDisabled();
   });
 
-  it('exposes access-control guidance for disabled button', () => {
-    render(<ExportModal {...baseProps} canCreateShareLink={false} />);
+  it('keeps access-control guidance focusable while fully blocking activation', async () => {
+    const parentClick = vi.fn();
+    render(
+      <div onClick={parentClick}>
+        <ExportModal {...baseProps} canCreateShareLink={false} />
+      </div>
+    );
 
     expect(screen.getByText('접근 권한 관리는 프로젝트 권한 설정에서 처리합니다.')).toBeInTheDocument();
     const accessManagementButton = screen.getByRole('button', { name: '접근 관리' });
-    expect(accessManagementButton).toBeDisabled();
+
+    // Verify it is functionally disabled but discoverable
+    expect(accessManagementButton).toHaveAttribute('aria-disabled', 'true');
+    accessManagementButton.focus();
+    expect(accessManagementButton).toHaveFocus();
+
     expect(accessManagementButton).toHaveAttribute('aria-describedby', 'share-export-access-hint');
     expect(accessManagementButton).not.toHaveAttribute('title');
+
+    // Ensure it does not trigger click events or bubble up
+    fireEvent.click(accessManagementButton);
+    expect(parentClick).not.toHaveBeenCalled();
   });
 });
diff --git a/frontend/src/components/modals/ExportModal.tsx b/frontend/src/components/modals/ExportModal.tsx
index 995393ceb..e778358bf 100644
--- a/frontend/src/components/modals/ExportModal.tsx
+++ b/frontend/src/components/modals/ExportModal.tsx
@@ -202,7 +202,8 @@ export function ExportModal({
               )}
               <button
                 type="button"
-                disabled
+                aria-disabled="true"
+                onClick={(e) => { e.preventDefault(); e.stopPropagation(); }}
                 aria-describedby="share-export-access-hint"
                 className="exportModal__disabledHintButton"
               >