feat(e2e): add Peptide News admin smoke spec (07)

Covers dashboard (HTTP 200, no fatal, heading + summary cards + date filter),
settings (form present), articles, and LLM costs sub-pages.
Skip-if-absent guard on all tests: when plugin is not installed on the
environment, tests skip loudly instead of hard-failing.

Selectors sourced from:
  admin/class-pn-admin-menu.php  (slugs)
  admin/partials/dashboard.php   (.pn-summary-cards, .pn-date-filter, h1)

Agent-Session: claude/e2e-news-vision-admin-20260617

tests/07-peptide-news-admin.spec.ts

@@ -0,0 +1,142 @@
+/**
+ * 07-peptide-news-admin.spec.ts
+ *
+ * What: Smoke tests for the Peptide News Plugin admin surfaces.
+ *       Verifies the dashboard, settings, articles, and cost sub-pages
+ *       load without PHP fatals and checks expected UI elements.
+ *       Guards against activation failures, missing menu registration, or
+ *       PHP fatals introduced by a bad deploy.
+ *
+ * Who triggers it: Playwright chromium project (post-auth setup).
+ * Dependencies: wp-admin authenticated session (from global.setup.ts).
+ *
+ * SKIP-IF-ABSENT: When the Peptide News Plugin is not installed/activated on
+ *   this environment, each test detects the absent menu page and skips with a
+ *   loud annotation — consistent with the 05/06 merge-early binding pattern.
+ *
+ * Admin menu slugs (sourced from admin/class-pn-admin-menu.php):
+ *   Dashboard  -> admin.php?page=peptide-news-dashboard
+ *   Settings   -> admin.php?page=peptide-news-settings
+ *   Articles   -> admin.php?page=peptide-news-articles
+ *   LLM Costs  -> admin.php?page=peptide-news-costs
+ *
+ * Selectors sourced from admin/partials/dashboard.php:
+ *   h1 "Peptide News Analytics"  - page heading (text match)
+ *   .pn-summary-cards            - summary card row
+ *   .pn-date-filter              - date range filter form
+ *
+ * @see peptiderepo/peptide-news-plugin admin/class-pn-admin-menu.php
+ * @see peptiderepo/peptide-news-plugin admin/partials/dashboard.php
+ */
+
+import { test, expect } from '@playwright/test';
+
+const ADMIN = '/wp-admin';
+
+/**
+ * Detect the "page not registered" condition WordPress returns when a plugin
+ * menu slug is unknown. Returns true when the plugin is absent.
+ *
+ * WordPress either:
+ * (a) Shows "You do not have sufficient permissions to access this page."
+ * (b) Shows a notice that the page cannot be found
+ * (c) Redirects back to /wp-admin/ stripping the ?page= param
+ */
+function isPluginAbsent(body: string, url: string): boolean {
+  return (
+    body.includes('Invalid plugin page') ||
+    body.includes('do not have sufficient permissions') ||
+    body.includes('The page you are looking for') ||
+    ( url.includes('/wp-admin/') && ! url.includes('page=peptide-news') )
+  );
+}
+
+/** Push a loud skip annotation and call test.skip(). */
+function skipMissing(): void {
+  test.info().annotations.push({
+    type: 'skip',
+    description:
+      '[peptide-news smoke] Peptide News Plugin is not installed or activated ' +
+      'on this environment. Skipping per the merge-early binding.',
+  });
+  test.skip();
+}
+
+test.describe('WP Admin - Peptide News Plugin dashboard', () => {
+  test('dashboard page loads (HTTP 200, no PHP fatal)', async ({ page }) => {
+    const res = await page.goto(`${ADMIN}/admin.php?page=peptide-news-dashboard`);
+    expect(res?.status()).toBe(200);
+
+    await expect(page.locator('#wpbody')).toBeVisible();
+
+    const body = (await page.textContent('body')) ?? '';
+    expect(body).not.toContain('Fatal error');
+
+    if (isPluginAbsent(body, page.url())) { skipMissing(); return; }
+  });
+
+  test('dashboard renders analytics heading, summary cards, and date filter', async ({ page }) => {
+    await page.goto(`${ADMIN}/admin.php?page=peptide-news-dashboard`);
+
+    await expect(page.locator('#wpbody')).toBeVisible();
+    const body = (await page.textContent('body')) ?? '';
+    expect(body).not.toContain('Fatal error');
+
+    if (isPluginAbsent(body, page.url())) { skipMissing(); return; }
+
+    // Heading from admin/partials/dashboard.php: <h1>Peptide News Analytics</h1>
+    await expect(
+      page.locator('h1').filter({ hasText: 'Peptide News Analytics' })
+    ).toBeVisible({ timeout: 10_000 });
+
+    // Summary card row: <div class="pn-summary-cards">
+    await expect(page.locator('.pn-summary-cards')).toBeVisible({ timeout: 10_000 });
+
+    // Date range filter form: <form class="pn-date-filter">
+    await expect(page.locator('.pn-date-filter')).toBeVisible({ timeout: 10_000 });
+  });
+});
+
+test.describe('WP Admin - Peptide News Plugin settings page', () => {
+  test('settings page loads (HTTP 200, no fatal, settings form present)', async ({ page }) => {
+    const res = await page.goto(`${ADMIN}/admin.php?page=peptide-news-settings`);
+    expect(res?.status()).toBe(200);
+
+    await expect(page.locator('#wpbody')).toBeVisible();
+    const body = (await page.textContent('body')) ?? '';
+    expect(body).not.toContain('Fatal error');
+
+    if (isPluginAbsent(body, page.url())) { skipMissing(); return; }
+
+    // Every settings page rendered by class-pn-admin-settings-page.php contains a form
+    await expect(page.locator('form').first()).toBeVisible({ timeout: 10_000 });
+  });
+});
+
+test.describe('WP Admin - Peptide News Plugin articles page', () => {
+  test('articles page loads without fatal error', async ({ page }) => {
+    const res = await page.goto(`${ADMIN}/admin.php?page=peptide-news-articles`);
+    expect(res?.status()).toBe(200);
+
+    await expect(page.locator('#wpbody')).toBeVisible();
+    const body = (await page.textContent('body')) ?? '';
+    expect(body).not.toContain('Fatal error');
+    expect(body).not.toContain('Invalid plugin page');
+
+    if (isPluginAbsent(body, page.url())) { skipMissing(); return; }
+  });
+});
+
+test.describe('WP Admin - Peptide News Plugin LLM costs page', () => {
+  test('costs page loads without fatal error', async ({ page }) => {
+    const res = await page.goto(`${ADMIN}/admin.php?page=peptide-news-costs`);
+    expect(res?.status()).toBe(200);
+
+    await expect(page.locator('#wpbody')).toBeVisible();
+    const body = (await page.textContent('body')) ?? '';
+    expect(body).not.toContain('Fatal error');
+    expect(body).not.toContain('Invalid plugin page');
+
+    if (isPluginAbsent(body, page.url())) { skipMissing(); return; }
+  });
+});