fix: code review batch 2 — multi-channel, thread safety, DSP reset, MIDI, hotspot, NAM, docs/CI, code quality

docs/test-plan-focusrite.md

@@ -69,7 +69,7 @@ presets:
 | 2 | Wire guitar → Focusrite Input 1, Output 1 → amp | Physical | ✅ |
 | 3 | Start pedal: `python3 main.py --config ~/.pedal/config-mono.yaml` | Boots, JACK starts | ✅ |
 | 4 | Play guitar | Sound through amp, clean bypass | ✅ |
-| 5 | Open browser to `http://pedal.local:8080` | Web UI shows dashboard | ✅ |
+| 5 | Open browser to `http://pedal.local` | Web UI shows dashboard | ✅ |
 | 6 | Click bypass toggle on web UI | Pedal mutes → unmutes | ✅ |
 | 7 | Check preset name shows on dashboard | "Default" or first preset | ✅ |
 | 8 | Press preset up/down on footswitch or web UI | Changes preset, different sound | ✅ |