style: help badge at center top, More link right-aligned

The '?' badge sat in a corner, which drifts oddly when the view is
scaled to fit; the top middle stays put and out of the sample's way.
Transparency unchanged - visible enough to find, not disturbing.
'More... (F1)' moves to the overlay's right edge, reading like a
dialog's action button.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/aare/gui/widgets/camera_image.py

@@ -1089,7 +1089,9 @@ class SampleCameraImageLabel(QGraphicsView):
         # ponytail: painted circle, not a real QWidget button — the overlay it
         # toggles is painter-drawn too, and a widget would need layout juggling.
         diameter = 22
-        rect = QRectF(18, self.viewport().height() - diameter - 18, diameter, diameter)
+        # Center top, not a corner: corners drift oddly on scale-to-fit,
+        # the top middle stays put and stays out of the sample's way.
+        rect = QRectF((self.viewport().width() - diameter) / 2, 18, diameter, diameter)
 
         painter.save()
         painter.resetTransform()
@@ -1166,15 +1168,15 @@ class SampleCameraImageLabel(QGraphicsView):
                 painter.drawText(QPointF(bg_rect.left() + padding, y + fm.ascent()), entry)
                 y += line_height
 
-        # Trailing link to the full F1 dialog; underlined so it reads as clickable.
+        # Trailing link to the full F1 dialog; underlined so it reads as
+        # clickable, right-aligned like a dialog's action button.
         link_font = QFont(font)
         link_font.setUnderline(True)
         painter.setFont(link_font)
         painter.setPen(QPen(qcolor(LEGEND_TEXT), 1))
-        painter.drawText(QPointF(bg_rect.left() + padding, y + fm.ascent()), more_text)
-        self._help_more_rect = QRectF(
-            bg_rect.left() + padding, y, fm.horizontalAdvance(more_text), line_height
-        )
+        more_x = bg_rect.right() - padding - fm.horizontalAdvance(more_text)
+        painter.drawText(QPointF(more_x, y + fm.ascent()), more_text)
+        self._help_more_rect = QRectF(more_x, y, fm.horizontalAdvance(more_text), line_height)
 
         painter.restore()