v0.11.5 — PA Gain ready-to-calibrate indicator

Lyra v0.11.5

Hardware / scope: Hermes Lite 2 / 2+ over HPSDR Protocol 1. RX, plus
CW / SSB / AM / DSB / SAM / FM and digital (TCI / VAC) transmit. Windows
only for now (Linux / macOS planned, not yet buildable).

A small polish release: setting up per-band power calibration is now
harder to get wrong.

Ready-to-calibrate indicator (Settings → PA Gain)

Calibrating a band needs a full-drive TUN in a voice mode — but the two
easy trips (being in CW, or tuning below full drive) used to fail silently.
Now a live indicator sits right next to the Calibrate this band button and
tells you where you stand at a glance:

• green READY ✓ — you're set (voice mode, full drive).
• red ⚠ IN CW — CAN'T TUNE — the band is in CW, which makes no steady
  tune carrier. Mode is remembered per band, so it's easy to land on 15 / 10 m
  in CW without noticing — switch to SSB / AM / FM to calibrate.
• amber ⚠ …% — NOT FULL — the drive TUN will use isn't 100 %.

It follows the right drive automatically: your TX Drive slider, or —
if you've set a separate tune drive in Settings → TX — the Tune slider
or Fixed tune drive, and it names which one to bump.

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Upgrade note: nothing about your operating changes — this is purely a
clearer calibration setup. If your bands are already calibrated, they stay
calibrated.