test(ui): Playwright RLS sweep — real-browser proof, both personas

Phase 5.5 (plan §7.5) first increment: the SSR/HTMX frontend is swept
in a real browser (official Playwright image, no host browsers) for
BOTH personas — testuser (admin) and rls-phone (restricted; Audiobooks
hidden from them via the visibility API).

Green checks: auth rejection + session establishment; admin dashboard
renders sections incl. the hidden-from-others library; restricted
dashboard renders real sections (Recently Added present — not a
vacuous landing-page pass) with ZERO hidden-library traces; search and
media payloads leak nothing for the restricted persona.

Harness lessons encoded: / is a landing page (dashboard lives at
/dashboard); the login endpoint rate-limits rapid attempts so sessions
are established once per persona and reused via storageState — a sweep
must not look like a brute-force run; getByText visibility assertions
are wrong for <option> text (library switcher) — body-textContent
assertions instead.

COVERAGE.md tracks the full 14-area sweep per the plan; the remaining
areas (reader, collections CRUD, admin matrix, upload roundtrip) are
enumerated and pending their sweep runs.

tests/ui/rls_sweep.spec.ts

@@ -0,0 +1,99 @@
+import { expect, test, type Browser, type Page } from "@playwright/test";
+
+// Persona helpers: the two dev personas used across the sweep.
+// testuser  = admin, sees everything.
+// rls-phone = restricted user; the Audiobooks library is HIDDEN from
+// them (seeded by the rollout; see the RLS plan §7.5).
+//
+// Sessions are established ONCE per persona and reused via
+// storageState — the login endpoint rate-limits rapid attempts, and a
+// sweep should not look like a brute-force run.
+const PERSONAS = {
+  admin: { login: "testuser", password: "Test@Pass123!" },
+  restricted: { login: "rls-phone", password: "Test@Pass123!" },
+} as const;
+
+type Persona = keyof typeof PERSONAS;
+const stateCache: Partial<Record<Persona, string>> = {};
+
+async function authedPage(browser: Browser, persona: Persona): Promise<Page> {
+  if (!stateCache[persona]) {
+    const ctx = await browser.newContext();
+    const page = await ctx.newPage();
+    await page.goto("/login");
+    await page.fill('input[name="login"]', PERSONAS[persona].login);
+    await page.fill('input[name="password"]', PERSONAS[persona].password);
+    await page.click('button[type="submit"]');
+    await page.waitForLoadState("networkidle");
+    stateCache[persona] = await ctx.storageState();
+    await ctx.close();
+  }
+  const ctx = await browser.newContext({ storageState: stateCache[persona] });
+  return ctx.newPage();
+}
+
+// The restricted persona must never see Audiobooks content anywhere.
+const HIDDEN = "Audiobooks";
+
+test.describe("authentication", () => {
+  test("wrong password is rejected without a session", async ({ page }) => {
+    await page.goto("/login");
+    await page.fill('input[name="login"]', PERSONAS.admin.login);
+    await page.fill('input[name="password"]', "definitely-wrong");
+    await page.click('button[type="submit"]');
+    await page.waitForTimeout(1_500);
+    const cookies = await page.context().cookies();
+    expect(cookies.find((c) => c.name === "token" && c.value.length > 10)).toBeUndefined();
+  });
+});
+
+test.describe("admin persona sees everything", () => {
+  let page: Page;
+  test.beforeAll(async ({ browser }) => {
+    page = await authedPage(browser, "admin");
+  });
+
+  test("dashboard sections render with library content", async () => {
+    await page.goto("/dashboard");
+    const body = (await page.textContent("body")) ?? "";
+    expect(body).toContain("Recently Added");
+    expect(body).toContain("Not Started");
+    expect(body).toContain(HIDDEN); // admin sees the hidden-from-others library
+  });
+
+  test("search returns hidden-library titles for admin", async () => {
+    const resp = await page.goto("/api/media-items/search?query=Witcher");
+    expect(resp?.status()).toBe(200);
+    const body = (await page.textContent("body")) ?? "";
+    expect(body).toContain("Witcher");
+  });
+});
+
+test.describe("restricted persona: hidden means hidden", () => {
+  let page: Page;
+  test.beforeAll(async ({ browser }) => {
+    page = await authedPage(browser, "restricted");
+  });
+
+  test("dashboard never shows the hidden library or its items", async () => {
+    await page.goto("/dashboard");
+    expect((await page.textContent("body")) ?? "").toContain("Recently Added"); // real dashboard, not the landing page
+    const body = (await page.textContent("body")) ?? "";
+    expect(body).not.toContain(HIDDEN);
+  });
+
+  test("search results exclude hidden-library content", async () => {
+    const resp = await page.goto("/api/media-items/search?query=Witcher");
+    expect(resp?.status()).toBe(200);
+    const body = (await page.textContent("body")) ?? "";
+    // The Witcher audiobooks live in the hidden library — none may leak.
+    expect(body).not.toContain("Witcher");
+  });
+
+  test("media payloads exclude hidden-library items", async () => {
+    const resp = await page.goto("/api/media-items?limit=200");
+    expect(resp?.status()).toBe(200);
+    const body = (await page.textContent("body")) ?? "";
+    expect(body).not.toContain(HIDDEN);
+  });
+});