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>

apps/ely-doc/src/menu/tests.rs

@@ -41,7 +41,7 @@ fn right_click(cx: &mut VisualTestContext, docs: &Entity<Docs>, at: Point<Pixels
         docs.read(app)
             .offer
             .as_ref()
-            .is_some_and(|offer| offer.offered.target == target)
+            .is_some_and(|offer| offer.what.target == target)
     };
     for _ in 0..500 {
         cx.run_until_parked();
@@ -79,7 +79,7 @@ fn a_right_click_opens_word_rows_where_it_lands() {
         "the menu opens at the click, not the caret: {off:?}"
     );
     let on = |shown: &mut VisualTestContext, pick: Pick| {
-        shown.update(|_, app| pick.on(&docs.read(app).offer.as_ref().expect("an offer").offered))
+        shown.update(|_, app| pick.on(&docs.read(app).offer.as_ref().expect("an offer").what))
     };
     assert!(on(&mut shown, Pick::Comment));
     assert!(!on(&mut shown, Pick::Link), "the kernel links a selection");