Browser and viewport: item menu, per-item eyes, Delete key with confirmation

Right-click on any browser item (body, surface, datum, partition, set,
material, section, step, boundary condition, load, reference point,
coupling, contact, fluid domain) opens its menu: Edit…, Hide/Show,
Isolate, Show All, Active in step (boundary conditions and loads) and
Delete…. A right click on a datum or a partition's cut face in the
viewport opens the same menu. Each item the viewport draws on its own
has an eye; hidden items are neither drawn nor picked. Datums and
partitions are selectable with properties. Delete… and the Delete key
ask first (the prompt lists what uses the item: a datum's partitions
are deleted with it, other definitions in use are refused); ui.prompt
answers it. Every entry runs the same command as the ribbon and forms.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/render/src/glyphs.rs

@@ -1148,7 +1148,8 @@ mod tests {
         assert!(s.tris.is_empty() && s.on_top.is_empty());
         assert_eq!(s.lines.len(), 4 * 3 * 6);
         // A hidden definition draws nothing; hiding another leaves it.
-        let (hidden, _) = drawn_at(&Glyphs::from_model_hiding(&m, &|d, n| d == Definition::BoundaryCondition && n == "Clamp"), &m, &view(GlyphShow::ALL, u));
+        let (hidden, _) =
+            drawn_at(&Glyphs::from_model_hiding(&m, &|d, n| d == Definition::BoundaryCondition && n == "Clamp"), &m, &view(GlyphShow::ALL, u));
         assert!(hidden.lines.is_empty());
         let (other, _) = drawn_at(&Glyphs::from_model_hiding(&m, &|d, _| d == Definition::Load), &m, &view(GlyphShow::ALL, u));
         assert_eq!(other.lines.len(), s.lines.len());