v2.3.6

Added

• The toolbar can be reached from the caret (a11y). With focus in the text there was no way
  into the toolbar at all: Tab inserts a tab character, Shift+Tab was swallowed outright, and
  Escape blurred the editor to document.body. The toolbar sits before the content in the DOM,
  so it was only reachable by tabbing forward from somewhere above the editor — meaning
  keyboard-only users could not operate anything that exists only in the toolbar (font size, color
  picker, insert table, the overflow menu). Alt+F10 (⌥+F10 on macOS) now moves focus into the
  toolbar, matching the shortcut used by TinyMCE and CKEditor and the one the ARIA Authoring
  Practices Guide recommends documenting; Shift+Tab does the same without a function key.
  Escape inside the toolbar returns to the text with the caret intact, Tab moves forward into
  the text, and Shift+Tab leaves the editor — so the toolbar is never a focus trap. Inside a
  list, table, or code block Shift+Tab keeps its existing meaning. The toolbar exposes the
  shortcut via aria-keyshortcuts, and ToolbarServiceAPI gained focus() so host applications
  can trigger the same jump.
• fallback keymap priority. registerKeymap accepts { priority: 'fallback' }, a tier below
  default that is dispatched after every other plugin keymap but before the built-in Tab and
  Escape handling. It lets a plugin claim a key only when nothing else wanted it, without
  depending on plugin initialization order.