Cleanup obsolete tasks, simplify auth lock logic, increase test retry wait

- Remove completed Task 17 and 18 from Docs/tasks.md
- Remove ANIWORLD_TESTING bypass in _check_locked (testing env now uses test auth service)
- Remove redundant lock expiry cleanup (handled by _get_fail_record)
- Fix login.html whitespace formatting
- Increase setup retry wait from 6s to 45s for rate-limited CI environments

src/server/web/templates/login.html

@@ -302,9 +302,8 @@
         });
         
         // Form submission
-        const loginForm = document.getElementById('login-form');
+                const loginForm = document.getElementById('login-form');
                 const loginButton = document.getElementById('login-submit-btn');
-        const messageContainer = document.getElementById('message-container');
         
         loginForm.addEventListener('submit', async (e) => {
             e.preventDefault();