feat(ai-character): 관리자 인증 셸 구현

src/shared/ui/__tests__/icon-only-action.test.tsx

@@ -0,0 +1,21 @@
+import { render, screen } from "@testing-library/react";
+
+import { IconOnlyAction } from "@/shared/ui/icon-only-action";
+
+describe("IconOnlyAction", () => {
+  test("has an accessible name and a tooltip without duplicating the name as description", () => {
+    render(
+      <IconOnlyAction label="새로고침">
+        <span aria-hidden="true">R</span>
+      </IconOnlyAction>,
+    );
+
+    const button = screen.getByRole("button", { name: "새로고침" });
+    const tooltip = screen.getByRole("tooltip");
+
+    expect(tooltip).toHaveTextContent("새로고침");
+    expect(button).not.toHaveAccessibleDescription("새로고침");
+    expect(button).not.toHaveAttribute("aria-describedby");
+    expect(button).toHaveAttribute("type", "button");
+  });
+});