M7: a dragged page image leaves no outline where it was

Edit text & images outlines every picture from the page's inventory,
which still has the dragged one where it was until the release; that
outline trailed behind the picture and caught up after it was let go.
Leave the dragged picture's own outline out while it moves.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/ui-egui/src/edit_text_ui.rs

@@ -677,14 +677,17 @@ pub(crate) fn image_input(
     // hovered boxes, so a ~1000-image CAD page stays interactive in Edit text & images.
     // Fully clipped placements (empty visible frames) get no outline.
     let faint_all = boxes.len() <= MAX_OUTLINES;
+    // The picture being dragged has its frame at the pointer; its outline where it was would
+    // trail behind until the release.
+    let moving = selected.filter(|_| dragging);
     if faint_all {
-        for b in boxes.iter().filter(|b| b.is_positive()) {
+        for (_, b) in boxes.iter().enumerate().filter(|(i, b)| b.is_positive() && moving != Some(*i)) {
             painter.rect_stroke(*b, CornerRadius::ZERO, Stroke::new(0.75, ACCENT.gamma_multiply(0.35)), egui::StrokeKind::Outside);
         }
     }
     let hovered_box = hover_pos.and_then(|p| boxes.iter().enumerate().rposition(|(i, b)| b.is_positive() && b.contains(p) && image_contains(i, p)));
     if !faint_all {
-        for i in selected.into_iter().chain(hovered_box.filter(|h| Some(*h) != selected)) {
+        for i in selected.filter(|_| moving.is_none()).into_iter().chain(hovered_box.filter(|h| Some(*h) != selected)) {
             if let Some(b) = boxes.get(i).filter(|b| b.is_positive()) {
                 painter.rect_stroke(*b, CornerRadius::ZERO, Stroke::new(0.75, ACCENT.gamma_multiply(0.35)), egui::StrokeKind::Outside);
             }

crates/ui-egui/tests/editing.rs

@@ -4518,6 +4518,12 @@ fn a_resized_image_keeps_its_new_size_until_the_page_is_redrawn() {
         h.hover_at(grip + (to - grip) * (k as f32 / 4.0));
         h.run_steps(1);
     }
+    // While dragged, no outline stays where the picture was.
+    let old = egui::Rect::from_two_pos(at(60.0, 40.0), at(140.0, 120.0));
+    let trailing = h.output().shapes.iter().any(|shape| {
+        matches!(&shape.shape, egui::Shape::Rect(r) if r.stroke.width == 0.75 && (r.rect.min - old.min).length() < 2.0 && (r.rect.max - old.max).length() < 2.0)
+    });
+    assert!(!trailing, "the dragged picture's outline trails behind it");
     h.state_mut().views[0].hold_rasters = true;
     h.drop_at(to);
     for frame in 0..4 {