F2 Control screen Manual mode now has a row of step-size buttons
(0.1°, 0.5°, 1°, 5°, 10°) that scale arrow key nudges, plus
AZ/EL velocity inputs with Apply button for runtime motor speed
tuning via firmware mv/ma commands.
Bridge: set_max_velocity(), set_max_acceleration() write methods.
Demo: mutable dynamics + console mv/ma write handling.
Tests: 8 Textual pilot tests covering button toggle, nudge math,
velocity population, and apply round-trip.
Stop handler now calls cancel_operation() on the device bridge,
which sets a threading.Event that interrupts the 2s-timeout serial
read loop in send_with_timeout(). InterruptedError is caught
separately to prevent falling back to software sweep on cancel.
disconnect() uses acquire(timeout=5) with force-close fallback
instead of blocking lock acquisition — prevents deadlock when a
stuck worker holds the serial lock during shutdown.
Add 3 Textual async tests (pytest-asyncio) to verify Stop behavior:
firmware sweep stop, software sweep stop, and sweep restart.
send_with_timeout now uses a 2s per-byte timeout with a deadline
loop instead of one long blocking read, checking a cancel event
between reads. SerialBridge.disconnect() sets the cancel event
before acquiring the lock, so a blocked firmware sweep aborts
within ~2s and releases the lock for clean port shutdown.
Adds send_with_timeout() to CarryoutG2Protocol for long-running
commands, and az_sweep_firmware() to both SerialBridge and DemoDevice.
Sweep and Sky Map modes now try the firmware path first (single
azscanwxp command, streaming results) and fall back to software
step-dwell-measure on error or when "Software mode" checkbox is
checked. Software sweep fixed to set EL once and move AZ only.
F1 Position (compass rose, motor control, sparklines),
F2 Signal (RSSI gauge with sub-char precision, DVB/ADC sparklines, LNA toggle),
F3 Scan (AZ/EL grid sweep with heatmap and CSV export),
F4 System (NVS table, A3981 diagnostics, motor dynamics),
F5 Console (raw serial terminal with prompt detection and safety gates).
Includes SerialBridge (thread-safe protocol wrapper), DemoDevice
(synthetic simulation for --demo mode), dark RF theme with rounded
borders and teal accents, and send_raw() on CarryoutG2Protocol.
