On the document detail page, pass canEdit={canWrite} to the panel header,
guard onModeChange so a reader can never flip to edit, and default panelMode
to 'read' for readers. Thread canAnnotate={canWrite} through DocumentViewer
to PdfViewer so the annotation layer's canDraw (which also gates delete and
resize) is off for readers — they can open and read, but not draw, edit, or
delete. The writer-only OCR status check is also skipped for readers.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>