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 <[email protected]>

src/app/update/mod.rs

@@ -964,6 +964,10 @@ impl OpenCADStudio {
                             pl.color = new_color;
                         }
                         self.tabs[i].dirty = true;
+                        // ByLayer color is baked into the cached wires at
+                        // tessellation time, so bump the geometry epoch to
+                        // invalidate the wire cache and repaint with the new color.
+                        self.tabs[i].scene.bump_geometry();
                     }
                     self.tabs[i].layers.color_picker_row = None;
                     self.tabs[i].layers.color_full_palette = false;
@@ -984,6 +988,8 @@ impl OpenCADStudio {
                             pl.linetype = lt;
                         }
                         self.tabs[i].dirty = true;
+                        // Linetype is baked into the cached wires; repaint.
+                        self.tabs[i].scene.bump_geometry();
                     }
                 }
                 Task::none()
@@ -1001,6 +1007,8 @@ impl OpenCADStudio {
                             pl.lineweight = lw;
                         }
                         self.tabs[i].dirty = true;
+                        // Lineweight is baked into the cached wires; repaint.
+                        self.tabs[i].scene.bump_geometry();
                     }
                 }
                 Task::none()