The share dialog for notes and shared folders now offers "Bearbeiten" and
"Nur Lesen" and stores write/read accordingly. Editors already edit through
the sync engine since phase 2.
Adds e2e/share.e2e.mjs: shares a note as editor through the dialog and checks
that the recipient can edit it; e2e/run.sh runs both browser tests.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
