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>

1 files changed, 16 insertions, 3 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()
 
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