fix(Sign): restore visibleElements check in needCreateSignature to avoid blocking clickToSign

The commit e9ea794 changed needCreateSignature to return true for any
signer with a signRequestId, without checking whether visual elements
were placed. This caused the 'Sign the document.' button to be hidden
in clickToSign scenarios, because the 'Define your signature' prompt
was shown instead.

The signerHasSignRequest flag is already passed to the validator in
confirmSignDocument and executeSigningAction, so the drawing prompt
is triggered at action time when appropriate (e.g. GRAPHIC_ONLY mode).
The upfront needCreateSignature computed should only block the sign
button when there are placed visible elements for this signer.

Fixes E2E tests: multi-signer-sequential, sign-email-token-unauthenticated,
sign-herself-with-click-to-sign

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

src/views/SignPDF/_partials/Sign.vue

@@ -273,7 +273,11 @@ export default {
 			}
 			const document = this.signStore.document || {}
 			const signer = document?.signers?.find(row => row.me) || {}
-			return !!signer.signRequestId
+			if (!signer.signRequestId) {
+				return false
+			}
+			const visibleElements = document?.visibleElements || []
+			return visibleElements.some(row => String(row.signRequestId) === String(signer.signRequestId))
 		},
 		needIdentificationDocuments() {
 			return this.identificationDocumentStore.showDocumentsComponent()