test(e2e): add comment, release, star, PR and fork tests (#37800)

Adds Playwright e2e coverage for five high-value workflows, each driven
through semantic locators with API-based setup:

- comment on and close an issue
- publish a release
- star and watch a repository
- create a pull request from the compare page
- fork a repository

Also passes `autoInit: false` in existing tests that only exercise
DB-backed units (issues, reactions, milestones, projects, events),
skipping an unused initial commit to speed up their setup and reduce
parallel git contention.

---
This PR was written with the help of Claude Opus 4.7

---------

Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>
Co-authored-by: Nicolas <bircni@icloud.com>

tests/e2e/pr-create.test.ts

@@ -0,0 +1,23 @@
+import {env} from 'node:process';
+import {test, expect} from '@playwright/test';
+import {login, apiCreateRepo, apiCreateFile, randomString} from './utils.ts';
+
+test('create a pull request from the compare page', async ({page, request}) => {
+  const repoName = `e2e-pr-create-${randomString(8)}`;
+  const owner = env.GITEA_TEST_E2E_USER;
+  await apiCreateRepo(request, {name: repoName});
+  await Promise.all([
+    apiCreateFile(request, owner, repoName, 'feat.txt', 'feature content\n', {branch: 'main', newBranch: 'feat'}),
+    login(page),
+  ]);
+  // expand=1 renders the PR form directly, skipping the "New Pull Request" toggle click
+  await page.goto(`/${owner}/${repoName}/compare/main...feat?expand=1`);
+
+  const title = `e2e-pr-${randomString(8)}`;
+  await page.getByPlaceholder('Title').fill(title);
+  await page.getByRole('button', {name: 'Create Pull Request'}).click();
+
+  // commit, not full load: the PR title heading is server-rendered, so the assertion can resolve before the heavy diff/timeline finishes
+  await page.waitForURL(new RegExp(`/${owner}/${repoName}/pulls/\\d+$`), {waitUntil: 'commit'});
+  await expect(page.getByRole('heading', {name: title})).toBeVisible();
+});