fix(render): DXF leader hookline width + SHAPE name fallback; bump acadrust

Companion to the acadrust DXF-fidelity sweep (bump to 379ce12):
- Legacy LEADER hookline: underline the annotation using the leader's own
  stored text width (DXF code 41) when the MTEXT has no computed extents,
  so the landing spans the text instead of a short stub.
- SHAPE: resolve the glyph by name when the shape number is 0 (DXF SHAPE
  carries only the name), and search shape-file text styles when the entity
  has no direct style reference.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Cargo.lock

@@ -74,7 +74,7 @@ checksum = "366ffbaa4442f4684d91e2cd7c5ea7c4ed8add41959a31447066e279e432b618"
 [[package]]
 name = "acadrust"
 version = "0.4.0"
-source = "git+https://github.com/OpenAEC-Foundation/acadifc?branch=main#2e63e7053f0f245004b41c4b576a0529748f3f41"
+source = "git+https://github.com/OpenAEC-Foundation/acadifc?branch=main#379ce12e55a8b5f3c32b9678cc348f0b4dfb82c7"
 dependencies = [
  "ahash 0.8.12",
  "anyhow",
@@ -3180,7 +3180,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b577e2d69827c4740cba2b52efaad1c4cc7c73042860b199710b3575c68438d"
 dependencies = [
  "bytecount",
- "memchr 1.0.2",
+ "memchr 2.8.3",
  "nom 8.0.0",
 ]
 

src/entities/leader.rs

@@ -761,14 +761,24 @@ impl LeaderTess for Leader {
                 .or_else(|| style.map(|s| s.dimtad))
                 .unwrap_or(0);
             if dimtad != 0 {
-                if let Some(acadrust::entities::EntityType::MText(mt)) =
-                    document.get_entity(self.annotation_handle)
-                {
-                    if mt.extents_width > 0.0 {
-                        let to_far_edge =
-                            sign * (mt.insertion_point.x - last.x) + mt.extents_width;
-                        land_len = land_len.max(to_far_edge);
+                let mt = match document.get_entity(self.annotation_handle) {
+                    Some(acadrust::entities::EntityType::MText(mt)) => {
+                        Some((mt.extents_width, mt.insertion_point.x))
                     }
+                    _ => None,
+                };
+                // Underline width: the annotation MTEXT's laid-out extents when
+                // known, otherwise the leader's own stored annotation width
+                // (DXF code 41) — a DXF-loaded MTEXT often has no computed
+                // extents (extents_width == 0), which left the hook too short.
+                let width = mt
+                    .map(|(w, _)| w)
+                    .filter(|w| *w > 0.0)
+                    .unwrap_or(self.text_width);
+                if width > 0.0 {
+                    let ins_x = mt.map(|(_, x)| x).unwrap_or(last.x);
+                    let to_far_edge = sign * (ins_x - last.x) + width;
+                    land_len = land_len.max(to_far_edge);
                 }
             }
             points.push([f64::NAN; 3]);

src/entities/shape.rs

@@ -63,32 +63,69 @@ fn shx_polylines(
     shape: &Shape,
     document: &acadrust::CadDocument,
 ) -> Option<crate::scene::text::shx::ShapePolylines> {
-    let style = shape
-        .style_handle
-        .and_then(|h| document.text_styles.iter().find(|s| s.handle == h))
-        .or_else(|| {
-            let name = shape.style_name.trim();
-            (!name.is_empty())
-                .then(|| {
-                    document
-                        .text_styles
-                        .iter()
-                        .find(|s| s.name.eq_ignore_ascii_case(name))
-                })
-                .flatten()
-        })?;
-    let font = style.font_file.trim();
-    if font.is_empty() {
-        return None;
-    }
     let base = document
         .source_path
         .as_deref()
         .map(std::path::Path::new)
         .and_then(|p| p.parent());
-    let resolved = crate::io::resolve_image_file(font, base)?;
-    let num = u16::try_from(shape.shape_number).ok()?;
-    crate::scene::text::shx::shape_polylines(&resolved, num)
+    let name = shape.shape_name.trim();
+
+    // Resolve the glyph from one style's shape (.shx) file, preferring the
+    // shape NUMBER but falling back to the NAME — a DXF SHAPE carries only the
+    // name (code 2), so its `shape_number` is 0.
+    let try_style = |style: &acadrust::tables::TextStyle| {
+        let font = style.font_file.trim();
+        if font.is_empty() {
+            return None;
+        }
+        let resolved = crate::io::resolve_image_file(font, base)?;
+        if let Ok(num) = u16::try_from(shape.shape_number) {
+            if num != 0 {
+                if let Some(p) = crate::scene::text::shx::shape_polylines(&resolved, num) {
+                    return Some(p);
+                }
+            }
+        }
+        if !name.is_empty() {
+            return crate::scene::text::shx::shape_polylines_by_name(&resolved, name);
+        }
+        None
+    };
+
+    // 1. Direct style referenced by the SHAPE (handle, then name).
+    let direct = shape
+        .style_handle
+        .and_then(|h| document.text_styles.iter().find(|s| s.handle == h))
+        .or_else(|| {
+            let sn = shape.style_name.trim();
+            (!sn.is_empty())
+                .then(|| {
+                    document
+                        .text_styles
+                        .iter()
+                        .find(|s| s.name.eq_ignore_ascii_case(sn))
+                })
+                .flatten()
+        });
+    if let Some(style) = direct {
+        if let Some(p) = try_style(style) {
+            return Some(p);
+        }
+    }
+
+    // 2. No usable style reference (the DXF case): search every shape-file
+    //    style — one with a real font file and an empty table name — for a
+    //    glyph named like this shape.
+    if !name.is_empty() {
+        for style in document.text_styles.iter() {
+            if style.name.is_empty() && !style.font_file.trim().is_empty() {
+                if let Some(p) = try_style(style) {
+                    return Some(p);
+                }
+            }
+        }
+    }
+    None
 }
 
 impl TruckConvertible for Shape {