Add format?: 'short'|'long' (default 'long') to date.ts formatDate and
remove the duplicate from personFormat.ts. Update DocumentTopBar to
import from date.ts directly. Move the formatDate tests from
personFormat.spec to date.spec.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Unify the initials-extraction logic: the new string-based getInitials()
splits on whitespace, takes the first char of the first and last word
uppercased — matching the pattern that was already inlined in
CommentThread. Update PersonChip, DocumentMetadataDrawer, and
CommentThread to use the shared function.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
