Replace per-line 3-phase rolling animation with 2-line paged blocks.
Karaoke \k tags flow continuously across \N line breaks within each page.
Pages cross-fade with \fad transitions (300ms). No \move or \clip tags.
Reading flow is top-to-bottom within each page, matching teleprompter style.
Co-authored-by: Cursor <cursoragent@cursor.com>
