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/issue-comment.test.ts

@@ -0,0 +1,24 @@
+import {env} from 'node:process';
+import {test, expect} from '@playwright/test';
+import {login, apiCreateRepo, apiCreateIssue, randomString} from './utils.ts';
+
+test('comment on and close an issue', async ({page, request}) => {
+  const repoName = `e2e-issue-comment-${randomString(8)}`;
+  const owner = env.GITEA_TEST_E2E_USER;
+  await apiCreateRepo(request, {name: repoName, autoInit: false});
+  await Promise.all([
+    apiCreateIssue(request, {owner, repo: repoName, title: 'Comment test'}),
+    login(page),
+  ]);
+  await page.goto(`/${owner}/${repoName}/issues/1`);
+
+  const body = `e2e-comment-${randomString(8)}`;
+  await page.getByPlaceholder('Leave a comment').fill(body);
+  // exact match: the status button reads "Close with Comment" while the box has content, which substring-matches "Comment"
+  await page.getByRole('button', {name: 'Comment', exact: true}).click();
+  await expect(page.locator('.comment-body').filter({hasText: body})).toBeVisible();
+
+  // posting reloaded the page with an empty box, so the status button now reads "Close Issue"
+  await page.getByRole('button', {name: 'Close Issue'}).click();
+  await expect(page.getByRole('button', {name: 'Reopen Issue'})).toBeVisible();
+});