Change test URLs from '/sign?doc=' to '/?doc=' to match the correct
frontend route after the URL path correction in reminder emails.
Updated base64 encoded state in callback test:
- Old: L3NpZ24_ZG9jPXRlc3Q (decodes to /sign?doc=test)
- New: Lz9kb2M9dGVzdA (decodes to /?doc=test)
- New, clearer dashboard showing the status of each document
- The administrator can create a list of expected signatures for a given document.
- The administrator can manage the list of users who must confirm that they have read the document