Cargo: codec 76d2a1c, kernel e652b4d, graph 0545fa9; text styles, templates, solid edges

- Text styles keep their TrueType typeface through save and reopen (codec
  reads and writes the STYLE record's ACAD extended data) (#1633)
- Unnamed shape-file entries no longer show in text style lists (#1634)
- Save As offers DWT 2018; NEW asks for the template to start from, while
  Ctrl+N and the quick-access New run QNEW with the default template (#1635)
- An edge next to an earlier fillet of the same radius rounds together with
  it (kernel); the solid stays drawn and pickable while edges are chosen
  (#1625, #1107)
- A full cache rebuild drops the B-rep cache too, so an undone fillet does
  not come back with the next edge operation (#1107)
- Selected solids in shaded styles highlight only their visible edges (#1031)
- VIEW ISO / SWISO / SEISO / NEISO / NWISO snap to the isometric corners

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

src/app/commands/fileops.rs

@@ -3,7 +3,25 @@ use super::*;
 impl OpenCADStudio {
     pub(super) fn dispatch_fileops(&mut self, cmd: &str, i: usize) -> Option<Task<Message>> {
         match cmd {
-            "NEW" => return Some(Task::done(Message::TabNew)),
+            // QNEW starts from the default template (Options > Files); NEW
+            // asks which template to start from (#1635).
+            "QNEW" => return Some(Task::done(Message::TabNew)),
+            "NEW" => {
+                return Some(Task::perform(
+                    async {
+                        crate::sys::file_dialog()
+                            .set_title(crate::t!("Select Template").as_ref())
+                            .add_filter(
+                                crate::t!("Drawing Template (*.dwt)").as_ref(),
+                                &["dwt", "DWT", "dwg", "DWG", "dxf", "DXF"],
+                            )
+                            .pick_file()
+                            .await
+                            .map(|handle| crate::sys::handle_path(&handle))
+                    },
+                    Message::NewFromTemplate,
+                ));
+            }
             "OPEN" => return Some(Task::done(Message::OpenFile)),
             "SAVE" | "QSAVE" => return Some(Task::done(Message::SaveFile)),
             // SAVEALL — write every open drawing that already has a file path.

src/app/commands/layerprops.rs

@@ -875,8 +875,25 @@ impl OpenCADStudio {
                             crate::scene::CubeRegion::Face(face),
                         )));
                     }
-                    "ISO" | "ISOMETRIC" | "SWISO" => {
-                        return Some(Task::done(Message::ViewCubeHome));
+                    // Isometric presets snap to the matching ViewCube corner;
+                    // ISO alone is the south-west one.
+                    "ISO" | "ISOMETRIC" | "SWISO" | "SEISO" | "NEISO" | "NWISO" => {
+                        let (x, y) = match sub.as_str() {
+                            "SEISO" => (1.0, -1.0),
+                            "NEISO" => (1.0, 1.0),
+                            "NWISO" => (-1.0, 1.0),
+                            _ => (-1.0, -1.0),
+                        };
+                        let want = glam::Vec3::new(x, y, 1.0).normalize();
+                        let corner = (18..26)
+                            .map(crate::scene::CubeRegion::Corner)
+                            .max_by(|a, b| {
+                                a.snap_direction()
+                                    .dot(want)
+                                    .total_cmp(&b.snap_direction().dot(want))
+                            })
+                            .expect("the cube has corners");
+                        return Some(Task::done(Message::ViewCubeSnap(corner)));
                     }
                     // VIEW <name> shortcut for restore
                     _ => {

src/app/commands/mod.rs

@@ -850,6 +850,7 @@ inventory::submit!(crate::command::CommandRegistration {
         "CHSPACE",
         "NAVVCUBE",
         "NEW",
+        "QNEW",
         "OBJIMPORT",
         "OPEN",
         "ORTHO",

src/app/layers.rs

@@ -149,7 +149,12 @@ impl OpenCADStudio {
         }
         let doc = &self.tabs[i].scene.document;
 
-        let text_names: Vec<String> = doc.text_styles.iter().map(|s| s.name.clone()).collect();
+        let text_names: Vec<String> = doc
+            .text_styles
+            .iter()
+            .filter(|s| !s.is_shape_file)
+            .map(|s| s.name.clone())
+            .collect();
         let active_text = doc.header.current_text_style_name.clone();
         let active_text = if text_names.contains(&active_text) {
             active_text

src/app/mod.rs

@@ -2299,6 +2299,8 @@ pub enum Message {
     /// Options → Files: the default template for new drawings.
     QnewTemplateChanged(String),
     QnewTemplateBrowse,
+    /// NEW: the picked template a new drawing starts from (`None` = cancelled).
+    NewFromTemplate(Option<std::path::PathBuf>),
     /// Set the default type/version used when first saving a new drawing.
     DefaultSaveFormatChanged(String),
     /// Select one of Iced's built-in themes or the editable Custom theme.

src/app/shortcuts.rs

@@ -27,7 +27,7 @@ pub(super) fn default_bindings() -> BTreeMap<String, String> {
         ("F12".to_string(), "DYNINPUT"),
         (format!("{ACCEL}+0"), "CLEANSCREEN"),
         (format!("{ACCEL}+1"), "PROPERTIES"),
-        (format!("{ACCEL}+N"), "NEW"),
+        (format!("{ACCEL}+N"), "QNEW"),
         (format!("{ACCEL}+O"), "OPEN"),
         (format!("{ACCEL}+P"), "PLOT"),
         (format!("{ACCEL}+Q"), "QUIT"),

src/app/style_ops.rs

@@ -234,7 +234,14 @@ impl OpenCADStudio {
             v
         };
         match kind {
-            StyleKind::Text => doc.text_styles.iter().map(|s| s.name.clone()).collect(),
+            // Shape-file entries (complex linetype glyphs) are not text styles to
+            // pick or edit; they have no name (#1634).
+            StyleKind::Text => doc
+                .text_styles
+                .iter()
+                .filter(|s| !s.is_shape_file)
+                .map(|s| s.name.clone())
+                .collect(),
             StyleKind::Dim => doc.dim_styles.iter().map(|s| s.name.clone()).collect(),
             StyleKind::Table => from_objects(|o| match o {
                 ObjectType::TableStyle(s) => Some(s.name.as_str()),

src/app/update/file.rs

@@ -3137,6 +3137,8 @@ impl OpenCADStudio {
             let default_name = filename;
             let (filter_label, filter_ext): (&str, &str) = if ext.eq_ignore_ascii_case("dxf") {
                 ("DXF Files", "dxf")
+            } else if ext.eq_ignore_ascii_case("dwt") {
+                ("Drawing Template (*.dwt)", "dwt")
             } else {
                 ("DWG Files", "dwg")
             };

src/app/update/mod.rs

@@ -8028,6 +8028,22 @@ impl OpenCADStudio {
                 self.persist_settings_if_changed();
                 Task::none()
             }
+            Message::NewFromTemplate(Some(path)) => {
+                let task = self.update(Message::TabNew);
+                let idx = self.active_tab;
+                match self.apply_template(&path.to_string_lossy()) {
+                    Ok(_) => {
+                        self.tabs[idx].dirty = false;
+                        self.refresh_layer_panel();
+                        self.sync_ribbon_styles();
+                    }
+                    Err(error) => self
+                        .command_line
+                        .push_error(error["error"].as_str().unwrap_or("template")),
+                }
+                task
+            }
+            Message::NewFromTemplate(None) => Task::none(),
             Message::QnewTemplateBrowse => Task::perform(
                 async {
                     crate::sys::file_dialog()

src/app/view/modal.rs

@@ -1152,7 +1152,9 @@ impl OpenCADStudio {
                 let mut lt_opts: Vec<String> = vec!["ByBlock".to_string()];
                 lt_opts.extend(doc.line_types.iter().map(|lt| lt.name.clone()));
                 let mut textstyle_opts: Vec<String> = vec!["None".to_string()];
-                textstyle_opts.extend(doc.text_styles.iter().map(|t| t.name.clone()));
+                textstyle_opts.extend(
+                    doc.text_styles.iter().filter(|t| !t.is_shape_file).map(|t| t.name.clone()),
+                );
                 let opt_block = |h: Option<codec::types::Handle>| -> String {
                     match h {
                         Some(h) => doc
@@ -1416,7 +1418,11 @@ impl OpenCADStudio {
             let mut lt_opts: Vec<String> = vec!["ByBlock".to_string()];
             lt_opts.extend(doc.line_types.iter().map(|lt| lt.name.clone()));
             let text_style_opts: Vec<String> =
-                doc.text_styles.iter().map(|style| style.name.clone()).collect();
+                doc.text_styles
+                    .iter()
+                    .filter(|style| !style.is_shape_file)
+                    .map(|style| style.name.clone())
+                    .collect();
             let text_style_fixed_height = doc
                 .text_styles
                 .get(&self.ds_dimtxsty)