fix: activate preset on boot after restore_state()

restore_state() loads the last state from disk but doesn't call
activate() on the pipeline, so the NAM model was never loaded
on boot and no audio passed through. Added select() call with
the restored bank/program values so the pipeline loads the
preset chain including the NAM model.

main.py

@@ -192,6 +192,12 @@ class PedalApp:
                     self.presets.select(0, 0)
                 except Exception:
                     logger.info("No presets exist yet — pedal ready for MIDI/footswitch input")
+            else:
+                # restore_state() loads from disk but doesn't activate the pipeline
+                # Need to call select() to trigger pipeline.load_preset() and load NAM
+                logger.info("State restored — activating preset '%s' (bank=%d, program=%d)",
+                            restored.name, restored.bank, restored.program)
+                self.presets.select(restored.bank, restored.program)
 
             # ── 4. MIDI handler ──────────────────────────────────
             self.midi = MIDIHandler()