test: harden starter experience quality contract

tests/e2e/responsive.spec.js

@@ -0,0 +1,36 @@
+import { expect, test } from "@playwright/test";
+
+test("reflows the UI gallery at the 320px minimum without horizontal overflow", async ({
+  page,
+}) => {
+  await page.setViewportSize({ width: 320, height: 720 });
+  await page.goto("/examples/ui");
+  await expect(
+    page.getByRole("heading", { level: 1, name: "UI 구성요소" }),
+  ).toBeVisible();
+  await expect(
+    page.getByRole("button", { name: "메뉴", exact: true }),
+  ).toBeVisible();
+
+  const viewport = await page.evaluate(() => ({
+    clientWidth: document.documentElement.clientWidth,
+    scrollWidth: document.documentElement.scrollWidth,
+  }));
+  expect(viewport.scrollWidth).toBeLessThanOrEqual(viewport.clientWidth);
+});
+
+test("keeps desktop navigation and two-column examples at wide viewports", async ({
+  page,
+}) => {
+  await page.setViewportSize({ width: 1440, height: 900 });
+  await page.goto("/examples/ui");
+
+  await expect(page.getByRole("navigation", { name: "주요 탐색" })).toBeVisible();
+  await expect(
+    page.getByRole("button", { name: "메뉴", exact: true }),
+  ).toBeHidden();
+  await expect(page.locator(".component-grid--two").first()).toHaveCSS(
+    "grid-template-columns",
+    /.+px .+px/,
+  );
+});

tests/unit/manual-a11y-evidence.test.js

@@ -1,6 +1,10 @@
 import { describe, expect, it } from "vitest";
 
-import { validateManualA11yEvidence } from "../../scripts/lib/manual-a11y-evidence.mjs";
+import {
+  MANUAL_A11Y_ROUTE_IDS,
+  validateManualA11yEvidence,
+} from "../../scripts/lib/manual-a11y-evidence.mjs";
+import { ROUTE_REGISTRY } from "../../src/contracts/routes.js";
 
 const reviewed = `Status: reviewed
 Route ID: APP_HOME
@@ -20,6 +24,12 @@ Screen reader: pass
 Notes: no defects`;
 
 describe("manual accessibility evidence", () => {
+  it("requires evidence for every registered user-visible route", () => {
+    expect([...MANUAL_A11Y_ROUTE_IDS].sort()).toEqual(
+      Object.keys(ROUTE_REGISTRY).sort(),
+    );
+  });
+
   it("accepts a complete signed human review record", () => {
     expect(validateManualA11yEvidence(reviewed)).toMatchObject({
       failures: [],