add Mom/Tog to ToggleWidget, Big Title, Layout panel scaffold

- ToggleWidget: add Momentary/Toggle mode selector (mirrors TransportWidget
  minus OSC); HW routing respects trigger_mode; fix invisible button on init
  by removing explicit empty stylesheet; saves/loads trigger_mode per preset
- Big Title: full-width 28px bold QLineEdit above fader row, saves per-preset
  as big_title; green underline on focus; single bottom border, no separator
- Layout panel: floating 220px window to the left of main window, toggled by
  new Layout button next to Messages; shows Sections checkboxes (Preset
  Browser, Big Title, Fader Row, Toggle Row, Transport Row); tracks window
  move/resize; checkboxes not yet wired to functionality

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

togglewidget.py

@@ -4,7 +4,7 @@ from PyQt6.QtWidgets import (
     QWidget, QVBoxLayout, QHBoxLayout, QPushButton,
     QLabel, QSpinBox, QLineEdit, QFrame, QSizePolicy
 )
-from PyQt6.QtCore import Qt, QEvent
+from PyQt6.QtCore import Qt, QEvent, QTimer
 
 from palette import PALETTE_HEX, PALETTE_VIVID
 from styles import TITLE_STYLE
@@ -19,6 +19,7 @@ class ToggleWidget(QWidget):
         self.setFixedWidth(115)
         self.current_color = PALETTE_HEX.get("Gray", "#263238")
         self.toggle_state = False
+        self.trigger_mode = "toggle"
         self.uid = str(uuid.uuid4())
         self.zone = None
         self.center_index = None
@@ -108,6 +109,26 @@ class ToggleWidget(QWidget):
         _hbox_ch.addWidget(self.ch_spin)
         _grp2_layout.addWidget(self.ch_spin_row)
 
+        # Momentary / Toggle mode selector
+        trigger_row = QHBoxLayout()
+        trigger_row.setContentsMargins(0, 0, 0, 0)
+        trigger_row.setSpacing(2)
+        self.momentary_btn = QPushButton("Mom.")
+        self.momentary_btn.setFixedHeight(18)
+        self.momentary_btn.setCheckable(True)
+        self.momentary_btn.setChecked(False)
+        self.momentary_btn.setStyleSheet("border: none;")
+        self.toggle_mode_btn = QPushButton("Tog.")
+        self.toggle_mode_btn.setFixedHeight(18)
+        self.toggle_mode_btn.setCheckable(True)
+        self.toggle_mode_btn.setChecked(True)
+        self.toggle_mode_btn.setStyleSheet("font-weight: bold; color: #00e676;")
+        self.momentary_btn.clicked.connect(lambda: self.set_trigger_mode("momentary"))
+        self.toggle_mode_btn.clicked.connect(lambda: self.set_trigger_mode("toggle"))
+        trigger_row.addWidget(self.momentary_btn)
+        trigger_row.addWidget(self.toggle_mode_btn)
+        _grp2_layout.addLayout(trigger_row)
+
         self.cc_output_lbl = QLabel(f"CC{default_cc} [--]")
         self.cc_output_lbl.setAlignment(Qt.AlignmentFlag.AlignHCenter)
         self.cc_output_lbl.setStyleSheet("background-color: #000000; color: #00e676; font-size: 10px; padding: 1px; border: none;")
@@ -122,7 +143,6 @@ class ToggleWidget(QWidget):
 
         self.btn = QPushButton("", btn_container)
         self.btn.setFixedSize(60, 60)
-        self.btn.setStyleSheet("")
         self.btn.clicked.connect(self.on_click)
 
         self.led_dot = QLabel(btn_container)
@@ -289,15 +309,35 @@ class ToggleWidget(QWidget):
         self.apply_color(hex_color)
         self._update_btn_style()
 
+    def set_trigger_mode(self, mode):
+        self.trigger_mode = mode
+        if mode == "momentary":
+            self.momentary_btn.setChecked(True)
+            self.toggle_mode_btn.setChecked(False)
+            self.momentary_btn.setStyleSheet("font-weight: bold; color: #00e676;")
+            self.toggle_mode_btn.setStyleSheet("")
+        else:
+            self.toggle_mode_btn.setChecked(True)
+            self.momentary_btn.setChecked(False)
+            self.toggle_mode_btn.setStyleSheet("font-weight: bold; color: #00e676;")
+            self.momentary_btn.setStyleSheet("")
+
     def on_click(self):
-        self.toggle_state = not self.toggle_state
         cc_num = self.cc_spin.value()
         out_ch = self.ch_spin.value()
-        value = 127 if self.toggle_state else 0
-        print(f"[toggle] CC{cc_num} CH{out_ch} ({value})")
-        send_cc(cc_num, value, channel=out_ch)
-        self.cc_output_lbl.setText(self._cc_output_label(value))
-        self._update_btn_style()
+        if self.trigger_mode == "momentary":
+            print(f"[toggle momentary] CC{cc_num} CH{out_ch} (127)")
+            send_cc(cc_num, 127, channel=out_ch)
+            self.cc_output_lbl.setText(self._cc_output_label(127))
+            self.led_dot.setStyleSheet("background-color: #00e676; border-radius: 3px;")
+            QTimer.singleShot(150, lambda: self.led_dot.setStyleSheet("background-color: #3c3c3c; border-radius: 3px;"))
+        else:
+            self.toggle_state = not self.toggle_state
+            value = 127 if self.toggle_state else 0
+            print(f"[toggle] CC{cc_num} CH{out_ch} ({value})")
+            send_cc(cc_num, value, channel=out_ch)
+            self.cc_output_lbl.setText(self._cc_output_label(value))
+            self._update_btn_style()
 
     def _update_btn_style(self):
         if self.toggle_state:
@@ -318,6 +358,7 @@ class ToggleWidget(QWidget):
             "zone_index": self.zone_index,
             "hw_cc": self.hw_cc,
             "hw_channel": self.hw_channel,
+            "trigger_mode": self.trigger_mode,
         }
 
     def set_state(self, state):
@@ -341,6 +382,7 @@ class ToggleWidget(QWidget):
         self.zone_btn.set_state(self.zone == "left", self.zone == "right")
         self.hw_cc = state.get("hw_cc", None)
         self.hw_channel = state.get("hw_channel", None)
+        self.set_trigger_mode(state.get("trigger_mode", "toggle"))
         if self.hw_cc is not None:
             self.learn_btn.setText(f"HW: CC{self.hw_cc}")
             self.cc_input_lbl.setText(self._cc_input_label())