Timers: the gear chooses what a card shows, not which timers; a 24-hour switch; a date that fits

Which timers appear is the header's Timers ▾ menu's job, so the gear's
source switches (ProPresenter / LTC / module timers, the Clock on/off)
are gone. In their place the Show group offers the card's elements —
Names, Status lines, Detail lines, Seconds, Leading zeros, Source
headings; without seconds a countdown reads in whole minutes, rounded
up. The clock's format select is a 24-hour switch (an older layout's
"12h" choice is honoured); the clock card has no CLOCK label; Short day
and Short month appear once Date is on, and the date fits its card — one
line when it can, else a break after the day and a size that fits the
longer half. Solo tiles get the same element switches.

Shell: the settings window's grab bar is the accent colour and the gear
that opened it wears the same colour while it is open; showWhen works in
a tile's gear as it does on the admin page.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/MODULE-GUIDE.md

@@ -197,6 +197,8 @@ for a clock's format switches — give it a schema of what applies.
 `showWhen: "<key>"` hides a field until the boolean/`switch` field named
 `<key>` is on — e.g. the audio device and channel appear only once the LTC
 listener switch is enabled. The hidden field still keeps its stored value.
+It works the same in a tile's gear (`instanceSchema`): "Short day" and
+"Short month" appear once the clock's "Date" is on.
 
 A `select` whose choices are only knowable at runtime (audio devices, serial
 ports, discovered sources) sets `optionsRoute` instead of — or as a fallback