Fix settings/plugin window bugs; remove example plugin

- Add missing QGroupBox import to settings_window (caused silent crash on open)
- Remove Controls tab and _controls_tab() method from settings
- Clamp child window positions to screen bounds so they don't go off-screen on Windows when main window is maximized
- Apply same screen-clamp fix to Motion Capture plugin window
- Delete example plugin; disable it in enabled.json

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

2 files changed, 17 insertions, 43 deletions

diff --git a/ui/main_window.py b/ui/main_window.py
index 4372b9f..abfd585 100644
--- a/ui/main_window.py
+++ b/ui/main_window.py
@@ -368,12 +368,25 @@ class MainWindow(QMainWindow):
         self._show_win(self._win_settings, "right")
 
     def _show_win(self, win: QWidget, position: str = "right"):
-        geo = self.geometry()
         if not win.isVisible():
+            screen = QApplication.screenAt(self.geometry().center())
+            if screen is None:
+                screen = QApplication.primaryScreen()
+            avail = screen.availableGeometry()
+            # Use normalGeometry so maximized windows don't push child off-screen
+            geo = self.normalGeometry()
+            win.adjustSize()
+            w, h = win.width(), win.height()
             if position == "right":
-                win.move(geo.right() + 8, geo.top() + 40)
+                x = geo.right() + 8
+                y = geo.top() + 40
             else:
-                win.move(geo.left(), geo.bottom() + 8)
+                x = geo.left()
+                y = geo.bottom() + 8
+            # Clamp to available screen area
+            x = max(avail.left(), min(x, avail.right()  - w))
+            y = max(avail.top(),  min(y, avail.bottom() - h))
+            win.move(x, y)
         win.show(); win.raise_(); win.activateWindow()
 
     # ── Profile callbacks ─────────────────────────────────────────────────
diff --git a/ui/windows/settings_window.py b/ui/windows/settings_window.py
index 046cfae..422b6c9 100644
--- a/ui/windows/settings_window.py
+++ b/ui/windows/settings_window.py
@@ -13,7 +13,7 @@ from PyQt6.QtWidgets import (
     QWidget, QVBoxLayout, QHBoxLayout, QLabel, QPushButton,
     QTabWidget, QFrame, QFormLayout, QComboBox,
     QSpinBox, QDoubleSpinBox, QCheckBox, QLineEdit,
-    QFileDialog, QScrollArea,
+    QFileDialog, QScrollArea, QGroupBox,
 )
 from PyQt6.QtCore import Qt, pyqtSignal
 from PyQt6.QtGui import QCloseEvent, QFont
@@ -76,7 +76,6 @@ class SettingsWindow(QWidget):
         tabs.addTab(self._general_tab(),     "  General  ")
         tabs.addTab(self._acquisition_tab(), "  Acquisition  ")
         tabs.addTab(self._display_tab(),     "  Display  ")
-        tabs.addTab(self._controls_tab(),    "  Controls  ")
         tabs.addTab(self._plugins_tab(),     "  Plugins  ")
 
         # Bottom bar
@@ -163,44 +162,6 @@ class SettingsWindow(QWidget):
         root = QVBoxLayout(w); root.setContentsMargins(0,0,0,0); root.addWidget(scroll)
         return w
 
-    def _controls_tab(self):
-        """Output channel assignments — which device channel each control widget drives."""
-        w = QWidget()
-        scroll = QScrollArea(); scroll.setWidgetResizable(True)
-        scroll.setObjectName("deviceScroll")
-        cont = QWidget(); lay = QVBoxLayout(cont)
-        lay.setContentsMargins(14,12,14,12); lay.setSpacing(8)
-
-        info = QLabel(
-            "Configure which physical output channels are driven by each control widget.\n"
-            "Add output widget mappings below. Changes take effect on next app start."
-        )
-        info.setObjectName("traceSource"); info.setWordWrap(True)
-        lay.addWidget(info)
-
-        grp = QGroupBox("Output Assignments")
-        g_lay = QFormLayout(grp); g_lay.setSpacing(6)
-
-        # Collect digital output channels
-        out_channels = ["— none —"]
-        for dev in self.registry.all_instances():
-            for ch in dev.info.channels:
-                if ch.channel_id.startswith("do") or "out" in ch.channel_id.lower():
-                    out_channels.append(f"{dev.info.device_id} / {ch.channel_id}  ({ch.name})")
-
-        self._out_combos = {}
-        for label in ["Pump Power", "Heater", "Motor Enable", "PWM Ch 1"]:
-            cb = QComboBox(); cb.setObjectName("channelPickerCb")
-            cb.addItems(out_channels)
-            g_lay.addRow(f"{label}:", cb)
-            self._out_combos[label] = cb
-
-        lay.addWidget(grp)
-        lay.addStretch()
-        scroll.setWidget(cont)
-        root = QVBoxLayout(w); root.setContentsMargins(0,0,0,0); root.addWidget(scroll)
-        return w
-
     def _plugins_tab(self):
         w = QWidget()
         scroll = QScrollArea(); scroll.setWidgetResizable(True)