FlexRadio panel refinements from feedback:
- TRANSMIT and RECEIVE now share one collapse state — folding either folds both
(Card gained an optional controlled open/onToggle mode; the parent owns the
shared txrx state, persisted).
- Meter sizes: the Tuner Genius PWR/SWR meters used a 2-column grid (wider than
the Flex/amp meters). Switched to the same grid-cols-2 sm:grid-cols-3 so every
meter across the METERS, AMPLIFIER and TUNER cards is the same width.
- MIC and COMP meters are hidden outside phone modes (shown for SSB/AM/FM only).
- S-meter dBm moved inline next to the S-value (was a second line under the bar),
and the redundant dBm line under PWR removed — keeps only the watts. Saves height.