fix: only use embed hash name/email as fallback when recipient values are blank (#2586)

For document signing embeds, the hash-provided name and email should
only
be used when the recipient doesn't already have values set. For template
signing, the hash values are always allowed.

Also makes the email input editable in V1 embeds when the recipient has
no email, matching V2 behavior.

Ref: documenso/embeds#53

apps/remix/app/components/embed/embed-document-signing-page-v1.tsx

@@ -74,7 +74,7 @@ export const EmbedSignDocumentV1ClientPage = ({
   const { _ } = useLingui();
   const { toast } = useToast();
 
-  const { fullName, email, signature, setFullName, setSignature } =
+  const { fullName, email, signature, setFullName, setEmail, setSignature } =
     useRequiredDocumentSigningContext();
 
   const [hasFinishedInit, setHasFinishedInit] = useState(false);
@@ -89,6 +89,7 @@ export const EmbedSignDocumentV1ClientPage = ({
 
   const [isExpanded, setIsExpanded] = useState(false);
   const [isNameLocked, setIsNameLocked] = useState(false);
+  const [isEmailLocked, setIsEmailLocked] = useState(!!email);
   const [showPendingFieldTooltip, setShowPendingFieldTooltip] = useState(false);
   const [_showOtherRecipientsCompletedFields, setShowOtherRecipientsCompletedFields] =
     useState(false);
@@ -205,13 +206,19 @@ export const EmbedSignDocumentV1ClientPage = ({
     try {
       const data = ZSignDocumentEmbedDataSchema.parse(JSON.parse(decodeURIComponent(atob(hash))));
 
-      if (!isCompleted && data.name) {
+      if (!isCompleted && data.name && !fullName) {
         setFullName(data.name);
       }
 
       // Since a recipient can be provided a name we can lock it without requiring
       // a to be provided by the parent application, unlike direct templates.
       setIsNameLocked(!!data.lockName);
+
+      if (!isCompleted && data.email && !email) {
+        setEmail(data.email);
+        setIsEmailLocked(!!data.lockEmail);
+      }
+
       setAllowDocumentRejection(!!data.allowDocumentRejection);
       setShowOtherRecipientsCompletedFields(!!data.showOtherRecipientsCompletedFields);
 
@@ -449,7 +456,8 @@ export const EmbedSignDocumentV1ClientPage = ({
                           id="email"
                           className="mt-2 bg-background"
                           value={email}
-                          disabled
+                          onChange={(e) => setEmail(e.target.value)}
+                          disabled={isEmailLocked}
                         />
                       </div>