feat(calendar): click-to-pick event times, loose time typing

The month grid was already the editor's date picker, but times could only
be typed or wheeled. While a time field has focus the month now gives way
to an hour grid and a :00/:15/:30/:45 row: an hour keeps the minutes, a
minute moves on from start to end, then out of the fields. The picker
replaces the grid rather than growing the editor, because the island's
layer surface is a fixed 480px and the editor nearly fills it. The field
keeps focus throughout, so typing and the wheel still work.

Typed times are normalised: "9.30", "9:30", "930", "9" and "14h15" become
HH:MM on leaving the field and again in toPayload, instead of failing
with "Times are HH:MM". Impossible values still fail, unchanged.

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

0 files changed, 0 insertions, 0 deletions