v0.5 — cleanup orphan code, add MIDI master volume learn, fix turn-deck crashes

- Remove vestigial lufs_meter_widget.py and debug_audio.py
- Delete unused WaveformWidget/WaveformMonitor classes, dead stubs, duplicate code
- Fix turn-mode deck crashes (deck3/deck4 missing from engine.decks, uninitialized manual_elapsed/duration)
- Replace raw print() with logging in main.py
- Add master_volume MIDI learn signal + settings popup entry
- Bump version to 0.5

main.py

@@ -1,8 +1,12 @@
 # main.py
 
 import json
+import logging
 import os
 import sys
+
+__version__ = "0.5"
+
 from PySide6.QtWidgets import (
     QApplication, QMainWindow, QWidget, QFileDialog,
     QVBoxLayout, QHBoxLayout, QSplitter
@@ -11,7 +15,7 @@ from PySide6.QtCore import Qt
 from PySide6.QtGui import QFont, QColor, QPalette
 
 from audio_engine import AudioEngine
-from deck_widget import DeckWidget, ExternalDeckWidget
+from deck_widget import DeckWidget
 from cart_widget import CartBankWidget
 from playlist_widget import PlaylistWidget
 from midi_engine import MidiEngine
@@ -19,6 +23,8 @@ from top_bar_widget import TopBarWidget, THEMES
 from history_widget import HistoryWidget
 from mixer_widget import MixerWidget
 
+logger = logging.getLogger(__name__)
+
 
 class RadioPanelWindow(QMainWindow):
     def __init__(self):
@@ -26,7 +32,7 @@ class RadioPanelWindow(QMainWindow):
 
         self.engine = AudioEngine()
 
-        self.setWindowTitle("Getting To It")
+        self.setWindowTitle(f"Getting To It v{__version__}")
         self.setMinimumSize(1400, 860)
         self.resize(1920, 1080)
         self._apply_global_style(THEMES[0])
@@ -48,10 +54,10 @@ class RadioPanelWindow(QMainWindow):
 
         # ── Build widgets ─────────────────────────────────────────────────
 
-        self.deck1 = DeckWidget("deck1", "DECK 1", "#00b894", self.engine)
-        self.deck2 = DeckWidget("deck2", "DECK 2", "#6c5ce7", self.engine)
-        self.deck3 = ExternalDeckWidget("deck3", "DECK 3", "#fdcb6e", self.engine)
-        self.deck4 = ExternalDeckWidget("deck4", "DECK 4", "#e17055", self.engine)
+        self.deck1 = DeckWidget("deck1", "DECK_001", "#00b894", self.engine, mode='deck')
+        self.deck2 = DeckWidget("deck2", "DECK_002", "#6c5ce7", self.engine, mode='deck')
+        self.deck3 = DeckWidget("deck3", "TURN_001", "#fdcb6e", self.engine, mode='turn')
+        self.deck4 = DeckWidget("deck4", "TURN_002", "#e17055", self.engine, mode='turn')
 
         self.cart_bank = CartBankWidget(self.engine)
         self.cart_bank.setFixedHeight(180)
@@ -117,6 +123,8 @@ class RadioPanelWindow(QMainWindow):
         # ── Wire signals ─────────────────────────────────────────────────
         self.deck1.track_started.connect(self.history_widget.add_track)
         self.deck2.track_started.connect(self.history_widget.add_track)
+        self.deck3.track_started.connect(self.history_widget.add_track)
+        self.deck4.track_started.connect(self.history_widget.add_track)
 
         # ── MIDI ──────────────────────────────────────────────────────────
         self._setup_midi()
@@ -233,6 +241,7 @@ class RadioPanelWindow(QMainWindow):
         self.midi.mixer_solo.connect(self._on_midi_mixer_solo)
         self.midi.mixer_pfl.connect(self._on_midi_mixer_pfl)
         self.midi.master_control.connect(self._on_midi_master_control)
+        self.midi.master_volume.connect(self._on_midi_master_volume)
         self.midi.controller_connected.connect(self._on_midi_status)
 
         self.midi.start()
@@ -240,7 +249,7 @@ class RadioPanelWindow(QMainWindow):
 
         ports = self.midi.list_ports()
         if ports:
-            print(f"[MIDI] Available ports: {ports}")
+            logger.info("Available ports: %s", ports)
 
     def _on_midi_play_pause(self, deck: str):
         if deck == 'deck1':
@@ -298,11 +307,14 @@ class RadioPanelWindow(QMainWindow):
                 v = round(max(lo, min(hi, v)), 1)
             setattr(master.compressor if knob != "ceiling_db" else master.limiter, knob, v)
 
+    def _on_midi_master_volume(self, val: float):
+        self.engine.mixer['master'].volume = max(0.0, min(1.0, val))
+
     def _on_midi_status(self, connected: bool, name: str):
         if connected:
-            print(f"[MIDI] Connected: {name}")
+            logger.info("Connected: %s", name)
         else:
-            print(f"[MIDI] Not connected: {name}")
+            logger.info("Not connected: %s", name)
 
     def closeEvent(self, event):
         self.midi.stop()