Replace full-form AddTaskSheet with a compact NL input sheet.
Type "meeting today at 1500" — the words "today" and "at 1500"
highlight inline in blue, the toolbar shows "Today, 15:00", and
the mic button becomes a submit arrow when the title is non-empty.
Parser handles: today/tomorrow, weekday names (mon–sun),
times as at 3pm / at 15:00 / at 1500 / 3:30pm.
Clean title strips the date tokens before saving.
Sheet uses height(500) detent so it floats above the keyboard.
iPadLayout was rendering TodayView without workoutVM, crashing with
a fatal EnvironmentObject error on any device where hSizeClass goes
.regular (iPad, iPhone Plus/Max in landscape). Rewrote to use proper
NavigationSplitView with List(selection:) driving the detail column.
Also caches calendarIcon as a static func + @State instead of
recomputing UIGraphicsImageRenderer on every body evaluation.