fix: recipients with CC role not being editable (#918)

## Description

Fixed issue where setting a recipient role as CC will prevent any
further changes as it is considered as "sent" and "signed".

## Other changes

- Prevent editing document after completed
- Removed CC and Viewers from the field recipient list since they will
never be filled
- Minor UI issues

## Checklist

- [X] I have tested these changes locally and they work as expected.
- [X] I have added/updated tests that prove the effectiveness of these
changes.
- [X] I have followed the project's coding style guidelines.

apps/web/src/app/(signing)/sign/[token]/name-field.tsx

@@ -118,7 +118,7 @@ export const NameField = ({ field, recipient }: NameFieldProps) => {
             <span className="text-muted-foreground">({recipient.email})</span>
           </DialogTitle>
 
-          <div className="py-4">
+          <div>
             <Label htmlFor="signature">Full Name</Label>
 
             <Input