Shared Family calendar and task list; notes default to Family; phone chat and Family card fixes

- Built-in Family calendar everyone with Calendar can edit (data/family)
- Family task list shared by everyone with Tasks
- New notes and lists start shared with the family
- Phone chat sized above the bottom bar and mini player so the message box is visible
- Family page cards no longer overflow on long chat previews
- Tests added and updated

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

public/style.css

@@ -1056,3 +1056,4 @@ body.vizopen { overflow: hidden; }
 
 .inboxbell { position: relative; }
 .inboxbell .nbadge { position: absolute; top: -6px; right: -6px; }
+.fmrow .grow { min-width: 0; }