fix(plugin-grid): 行「更多操作」触发器改为数「真正会渲染的项」，空则不渲染

.changeset/rowactionmenu-empty-guard.md

@@ -0,0 +1,25 @@
+---
+'@object-ui/plugin-grid': patch
+---
+
+fix(plugin-grid): don't render a row "⋮" trigger that opens an empty menu
+
+The object list's row overflow trigger was gated on whether row-action
+**handlers** were wired and how many actions were **declared**
+(`(canEdit && onEdit) || (canDelete && onDelete) || menuDefs.length > 0 || rowActions.length > 0`),
+while the menu's items were filtered a second time — per item, per record —
+against `visibleWhen` / `visible`. On a row where every item was
+predicate-suppressed the trigger still rendered and opened an empty box, which
+reads as a broken page: a platform object whose row actions are gated for one
+role showed a "⋮" on every row for everyone else, with nothing inside it.
+
+The trigger is now decided by the items that will actually render for that row,
+resolved through the same visibility functions the items gate themselves on, so
+the two cannot disagree. The decision is per row: within one grid a row that
+keeps an action keeps its trigger while a row with nothing left renders none. The
+inline `variant: 'primary'` button reads that same shared rule. The actions
+column is table-level and unchanged, so a row with nothing to offer renders an
+empty cell and every row keeps the same cell count.
+
+Which items render is untouched — only whether the trigger renders when none of
+them survive.