Initial commit: Gitea browser automation MCP server

TypeScript/Playwright MCP server exposing 9 Gitea tools (list_repos,
view_repo, view_file, list/create/view/comment/merge/close PR).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/auth.ts

@@ -0,0 +1,48 @@
+import { chromium, type Browser, type Page } from 'playwright';
+import 'dotenv/config';
+
+function requireEnv(key: string): string {
+  const value = process.env[key];
+  if (!value) throw new Error(`Missing required env var: ${key}`);
+  return value;
+}
+
+export const GITEA_URL = requireEnv('GITEA_URL');
+export const USERNAME = requireEnv('GITEA_USERNAME');
+const PASSWORD = requireEnv('GITEA_PASSWORD');
+
+export interface Session {
+  browser: Browser;
+  page: Page;
+}
+
+export async function createSession(): Promise<Session> {
+  const browser = await chromium.launch({ headless: true });
+  const page = await browser.newPage();
+
+  await page.goto(`${GITEA_URL}/user/login`, { waitUntil: 'load' });
+  await page.fill('input[name="user_name"]', USERNAME);
+  await page.fill('input[name="password"]', PASSWORD);
+
+  await Promise.all([
+    page.waitForNavigation({ waitUntil: 'load' }),
+    page.getByRole('button', { name: /sign in/i }).click(),
+  ]);
+
+  if (page.url().includes('change_password')) {
+    await page.fill('input[name="password"]', PASSWORD);
+    await page.fill('input[name="retype"]', PASSWORD);
+    await Promise.all([
+      page.waitForNavigation({ waitUntil: 'load' }),
+      page.getByRole('button', { name: /update password/i }).click(),
+    ]);
+  }
+
+  const loggedIn = (await page.$('.avatar')) !== null;
+  if (!loggedIn) {
+    await browser.close();
+    throw new Error('Login failed');
+  }
+
+  return { browser, page };
+}