feat(sync-help): ConflictModal inline 설명 + 자세히 보기 링크 (onOpenHelp prop)

tests/unit/ConflictModal.test.tsx

@@ -58,4 +58,26 @@ describe('ConflictModal', () => {
       expect(onClose).toHaveBeenCalled();
     });
   });
+
+  it('각 conflict row 에 local/remote inline 설명 표시', async () => {
+    render(<ConflictModal onClose={() => {}} onResolved={() => {}} onOpenHelp={() => {}} />);
+    await waitFor(() => screen.getByText(/local A/));
+    expect(screen.getAllByText(/이 기기의 변경을 보존/).length).toBeGreaterThanOrEqual(2);
+    expect(screen.getAllByText(/원격의 변경을 가져오고/).length).toBeGreaterThanOrEqual(2);
+  });
+
+  it('"자세히 보기" 클릭 → onOpenHelp("main-conflict") 호출', async () => {
+    const onOpenHelp = vi.fn();
+    render(<ConflictModal onClose={() => {}} onResolved={() => {}} onOpenHelp={onOpenHelp} />);
+    await waitFor(() => screen.getByText(/local A/));
+    const links = screen.getAllByRole('button', { name: /자세히 보기/ });
+    fireEvent.click(links[0]!);
+    expect(onOpenHelp).toHaveBeenCalledWith('main-conflict');
+  });
+
+  it('onOpenHelp 미제공 → "자세히 보기" 링크 미렌더', async () => {
+    render(<ConflictModal onClose={() => {}} onResolved={() => {}} />);
+    await waitFor(() => screen.getByText(/local A/));
+    expect(screen.queryByRole('button', { name: /자세히 보기/ })).toBeNull();
+  });
 });