- Fix test_bug_comment_reply and test_project_comment_reply to scope fill/click to .comment-reply-form instead of using generic textarea/button selectors
- Add test_login_next_redirects_to_target verifying ?next=/gists redirects after login
- Add test_login_next_rejects_external ensuring external ?next= URL falls back to /feed
- Add test_comment_reply_inline_form, test_comment_reply_toggle_and_cancel, test_comment_create_scrolls_to_anchor for post comment reply UX
- Add _seed_post_with_comments and _create_post_ui helpers in test_feed.py
- Fix test_news_comment URL assertion to use wildcard pattern for slug matching