v2.13.0

Added

• Days can be booked before they happen. The card's look-up picker no longer
  stops at today, so a week of vacation or sick leave can be entered in advance
  with Add, or in one go with set_period. A booked day that has not yet
  arrived is marked Planned in the look-up box.
• sensor.this_month_hours_this_month gained an upcoming_days attribute
  listing those pre-booked days, and each entry in the week sensors' days
  attribute carries a planned flag.

Fixed

• Leave dated in the future inflated the week and month totals. set_period
  already accepted future ranges, and the hours it credited were summed over the
  whole week or calendar month while the matching overtime figure only ever
  built its expected total from days up to today — so booking next week's
  vacation showed up immediately as overtime that had not been worked. Both
  totals now stop at today; planned days start counting on the day they arrive.