- master board: 11x9 last-digit aligned (col 0 = 1-9, col 8 = 80-90);
fixes missing ones-digit-9 row and aligns 1/11/21/.../81 horizontally
- master board: each called cell shows 1-based draw order so host can
glance across a winning row to verify "Kinh!"
- player card: constraint-aware picker guarantees exactly 5 numbers per
row AND per column (was loose weighted random allowing 4-6 per col)
- player card: numbers within each column now placed ascending
top-to-bottom per lô tô hội chợ tân tân convention