fix: open-issue sweep — drawing, plot, snap, layout and UI fixes

Fixes:
- Font prompt no longer lists bundled ltypeshp/qcadshp shape files (#1626)
- Wide polylines step at a discontinuous segment width; PEDIT marks the
  current vertex; keyword steps refresh the command preview (#1628)
- Radius-0 fillet drops the zero-length segment it left, so the corner
  fillets again (#1422)
- FILLET Trim / No trim option (#1558)
- True-colour wires plot in their own colour; colour picker stores the
  value it shows (#1621)
- Model tab keeps its page setup; "Save changes to layout" in Model (#1620)
- QNEW default template in Options > Files; .dwt in the open dialog
  (#1134, #1113)
- GRIDUNIT / GRIDMODE / PERSPECTIVE variables (#1618, #1524)
- PTYPE (#1433)
- ZOOM nX / nXP (#1465)
- CHSPACE between model and paper space through a viewport (#1428)
- Moving a dimension keeps its automatic text placement
- Shell icon; "&&" button labels (#1554)
- LINETYPE Load from a .lin file (#1588)
- XLINE / RAY hide the crosshair arms (#1437)
- Dynamic-input boxes keep clear of the crosshair and each other (#1546)
- Snap marker colour setting, dark default on light canvases
  (#1497, #1229, #1128)
- Dimension style precision as a 0.00 pattern dropdown (#1426)
- Node graph nodes left of the origin no longer clip away (#1592)
- Collapse button in the command history header (#1094)
- Freeze-in-current-viewport toggle in the ribbon layer list (#1466)
- Geometric Center object snap for closed polylines (#1369)

New strings translated in all 21 locales.

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

src/app/command_driver/utilities.rs

@@ -677,6 +677,7 @@ impl OpenCADStudio {
             None
         };
         let is_escape = matches!(&input, StepInput::Escape);
+        let keyed = matches!(&input, StepInput::Text(_) | StepInput::Enter);
         let result: Option<CmdResult> = {
             let Some(cmd) = self.tabs[i].active_cmd.as_mut() else {
                 return (Task::none(), false);
@@ -703,7 +704,15 @@ impl OpenCADStudio {
             self.tabs[i].pending_pause_tokens = None;
         }
         match result {
-            Some(r) => (self.apply_cmd_result(r), true),
+            Some(r) => {
+                let task = self.apply_cmd_result(r);
+                // A keyword can move the step without the cursor moving
+                // (PEDIT Next vertex): redraw its preview now (#1628).
+                if keyed && self.active_tab == i {
+                    self.refresh_active_cmd_preview(i);
+                }
+                (task, true)
+            }
             None => (Task::none(), false),
         }
     }