- AC-7: disabled editor → pencil is disabled + aria-disabled + tabindex -1, and
neither keyboard nor pointer activation mounts a dropdown (WCAG 2.1.1, not just
pointer-events-none).
- AC-8: plain text shows no pencil/dropdown; two adjacent mentions each keep one
pencil with no spurious gap pencil and no auto-open; a doc-start mention still
renders its pencil.
- Security: an oversized stored displayName clips the search query to 100 chars
while the preserved node text stays full-length; re-link sources personId
solely from the picked Person (p-anna), never the reflected/clipped text.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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