The storage summary gains a connection <select> (hidden with fewer than two
connections) listing every configured connection with the default labelled.
Selection is a per-modal override — loadFromStorage re-resolves the summary
and credentials immediately, stale selections fall back to the default, and
the account default stays untouched. Picker logic lives in
uploadModalStorageUnlock.js for UploadModal's file-size budget.
Co-Authored-By: Claude Fable 5 <[email protected]>
