Family board: tap chores to take, finish or undo them; style number inputs

- Chores on the board are tappable; pick your name (PIN unless a child) and it happens as you
- Up-for-grabs chores offer "I did it" or "Take it for later"
- Number inputs (chore points, time limit) use the dark input style so they are readable
- Tests and README updated

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

public/style.css

@@ -241,7 +241,7 @@ body.onaudio #view { flex: none; overflow: visible; padding-bottom: 0; }
   .cday .chips small { color: var(--muted); font-size: 11px; text-align: left; padding-left: 6px; }
 }
 
-select, textarea, input[type=date], input[type=datetime-local], input[type=time] { width: 100%; min-height: 48px; padding: 0 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--panel); font-size: 16px; color: var(--text); }
+select, textarea, input[type=number], input[type=date], input[type=datetime-local], input[type=time] { width: 100%; min-height: 48px; padding: 0 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--panel); font-size: 16px; color: var(--text); }
 textarea { padding: 12px 14px; resize: vertical; font-family: inherit; }
 .chk { display: flex; align-items: center; gap: 10px; color: var(--text); font-size: 16px; margin: 14px 0 0; }
 .chk input { width: 22px; height: 22px; }