YATA v0.5 Beta

First signed release build.
Includes: branded PDF/image export for Project/Tag/Person/List (accent letterhead, stat chips, project/list grouping, tag chips, assignee names, include/exclude completed with age cutoff, strike-off toggle, Compact/Relaxed layout), redesigned priority indicator (dots + colored edge stripe), equal-width hero stat cards, and an expanded natural-language quick-add parser (word-based priority, flag detection, more relative dates and recurrence words).