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Wrapping the editor with pointer-events-none was visual-only — keyboard users could still tab into the contenteditable and type. Wire `editable: !disabled` on the Tiptap Editor and a reactive `$effect` that calls setEditable when the prop flips after mount; expose `aria-disabled="true"` on the wrapper so screen readers announce the deactivated state. Tests assert contenteditable=false and aria-disabled=true when disabled; contenteditable=true otherwise. Closes WCAG 2.1.1 / 4.1.2 — Felix #5615 + Leonie #5621 + Nora #5618 BLOCKER. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>