R5.5: ElyTable right-click menus, Excel-style; three rounds used, last fixes tested

Grid and header menus share ely_office::menu with ElyDoc. Each item's
availability is the kernel's state for the exact command it runs
(patch 0045). Patch 0046 lets a header select its row or column while
a shape is selected or its text is edited: the view shell ends the
drawing edit, keeps the typed text, leaves drawing mode, then marks.
Ely no longer sends Esc first.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

crates/ely-lok/src/client/tests/commands.rs

@@ -143,7 +143,7 @@ fn every_mapped_command_reaches_the_kernel_and_reports_state() {
     assert!(text.contains("fo:font-weight=\"bold\""), "bold landed");
     assert_eq!(
         commands::all().count(),
-        247,
+        248,
         "the rows of text, layout, refs, tools, sheet, calc, data, analysis, page, show and draw"
     );
 }