fix(render): repaint on layer/property edits (#231)

Layer color/linetype/lineweight and MATCHPROP edits set the
document dirty flag but never bumped geometry_epoch. The wire
caches key on that epoch and bake a ByLayer entity's resolved
color at tessellation time, so they returned stale wires until
a new entity forced a rebuild. Bump geometry on those four
handlers so the edit repaints immediately.

Also remove REGEN/REGENALL/REDRAW/REDRWALL: the GPU raster
pipeline keeps the display continuously in sync, so on-demand
regen/redraw is a no-op concept in OCS.

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

src/app/command_driver.rs

@@ -764,6 +764,10 @@ impl OpenCADStudio {
                         }
                     }
                     self.tabs[i].dirty = true;
+                    // Color / linetype / lineweight are baked into the cached
+                    // wires at tessellation time; bump the geometry epoch so the
+                    // matched objects repaint instead of holding their old look.
+                    self.tabs[i].scene.bump_geometry();
                     self.refresh_properties();
                     self.command_line
                         .push_info(&format!("Properties matched to {} object(s).", dest.len()));