fix(edit): reach as high as a larger range's glyphs

With only a range enlarged, row_step is the source leading, so the
styled rewrite's reach rose one source line above its old box while a
120-point range draws far higher, and an image there was missed. The
pitch is now at least 1.2 times the largest size.

The landing test gains a 120-point range on a 12-point OCR line under an
image above the old box; it fails without the floor.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SqmHYx8FiWM5PcsoiErgp9

crates/edit/src/tests.rs

@@ -4579,6 +4579,18 @@ fn an_ocr_rewrite_goes_on_top_of_paint_over_where_it_lands() {
     let moved = text::BlockStyle { offset: Some([-290.0, -450.0]), ..Default::default() };
     let sized = text::BlockStyle { size: Some(24.0), ..Default::default() };
     let spaced = text::BlockStyle { line_spacing: Some(3.0), ..Default::default() };
+    let range = text::RangeStyle {
+        range: 0..2,
+        family: None,
+        resource: None,
+        size: Some(120.0),
+        color: None,
+        underline: None,
+        char_spacing: None,
+        scale: None,
+    };
+    let enlarged = text::BlockStyle { ranges: vec![range], ..Default::default() };
+    let above = "q 200 0 0 60 100 200 cm /Im0 Do Q";
     let cases = [
         ("BT /F1 12 Tf 3 Tr 400 600 Td (Away) Tj ET", "Moved", &moved),
         ("BT /F1 12 Tf 3 Tr 400 600 Td (Away) Tj ET", "Moved\nTwice", &moved),
@@ -4590,6 +4602,7 @@ fn an_ocr_rewrite_goes_on_top_of_paint_over_where_it_lands() {
     let cases = cases.into_iter().map(|(c, e, s)| (c, e, s, scan)).chain([
         ("BT /F1 12 Tf 3 Tr 110 500 Td (Above) Tj ET", "One\nTwo\nThree\nFour\nFive\nSix", &sized, low),
         ("BT /F1 12 Tf 3 Tr 110 500 Td (Above) Tj ET", "One\nTwo\nThree\nFour\nFive\nSix", &spaced, low),
+        ("BT /F1 12 Tf 3 Tr 110 150 Td (Hi there) Tj ET", "Hi there", &enlarged, above),
     ]);
     for (content, edit, style, scan) in cases {
         let mut doc = image_page_with(&format!("{content} {scan}"));

crates/edit/src/text_regions/styled.rs

@@ -824,7 +824,8 @@ pub(crate) fn rewrite_styled_block(
     // from the initial state.
     let largest =
         block.lines.iter().filter_map(|i| lines.get(*i)).map(|l| l.size).chain(style.ranges.iter().filter_map(|r| r.size)).fold(first.size, f64::max);
-    let pitch = source_leading.max(row_step(style, largest, source_leading));
+    // At least one line of the largest glyphs, so a larger range reaches up as far as it draws.
+    let pitch = source_leading.max(row_step(style, largest, source_leading)).max(largest * 1.2);
     let widest = measured.iter().copied().fold(width, f64::max);
     // This path lays rows out along user-space baselines, so the paragraph is upright here.
     let reach = crate::Reach { rect: block.rect, offset: [dx, dy], width: widest, rows: rows.len(), pitch, upright: true };