Count: measured messages and listing, groups, Current area, boundary checks, fills and solids recoloured

- COUNTCOLOR / COUNTERRORCOLOR / COUNTSERVICE reject any other value with
  the range message; COUNTTABLE ? lists in the reference order, padded,
  22 lines a page with Press ENTER to continue:, then the totals.
- Target picks report N found / N found, M total; several objects (or one
  that is not a block reference) count their copies, shown as Geometries
  in the palette.
- Current area is the area in use (kept aside by Entire model space),
  otherwise all of model space; an invalid Object boundary ends with the
  reference message.
- Count colours reach solids and fills; the palette list and the count
  are recomputed only when the drawing changes.

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

src/app/view/mod.rs

@@ -3035,6 +3035,7 @@ impl OpenCADStudio {
                 &self.count_palette,
                 tab.count.as_ref(),
                 &tab.scene.document,
+                tab.scene.geometry_epoch,
                 width,
                 auto_collapse,
             ),