Fit a read-only table's rows to their cells

A table keeps each row's height on its cells, corrected after every
layout through a transaction. A read-only editor applies no transaction
(EditorState.apply returns while it isn't editable), so a table shown
read-only kept the heights it was stored with, or the default of one
line: a cell of several lines ran over its row's borders. The table's
own height (colsHeight) already took the read-only case in place; the
rows' heights now do the same. Upstream's main has the same code.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi

lib/src/editor/block_component/table_block_component/table_node.dart

@@ -209,6 +209,14 @@ class TableNode {
             _cells[i][row],
             {TableCellBlockKeys.height: maxHeight},
           );
+          // A read-only editor applies no transaction, so its rows would
+          // keep their height whatever their cells hold: they take it in
+          // place, as the table's height below does.
+          if (editorState != null && editorState.editable != true) {
+            _cells[i][row].updateAttributes(
+              {TableCellBlockKeys.height: maxHeight},
+            );
+          }
         } else {
           _cells[i][row].updateAttributes(
             {TableCellBlockKeys.height: maxHeight},