Fix relationship formating and localization in REST

- Issue type name shouldn’t be localized.
- Add issue type label with localized name.
- Relationships where issue is destination were not formatted correctly.

Fixes #23898, 23899

api/soap/mc_issue_api.php

@@ -544,7 +544,14 @@ function mci_issue_get_relationships( $p_issue_id, $p_user_id ) {
 			$t_reltype = array();
 			$t_relationship['id'] = (int)$t_relship_row->id;
 			$t_reltype['id'] = (int)$t_relship_row->type;
-			$t_reltype['name'] = relationship_get_description_src_side( $t_relship_row->type );
+
+			if( ApiObjectFactory::$soap ) {
+				$t_reltype['name'] = relationship_get_description_src_side( $t_relship_row->type );
+			} else {
+				$t_reltype['name'] = relationship_get_name_for_api( $t_relship_row->type );
+				$t_reltype['label'] = relationship_get_description_src_side( $t_relship_row->type );
+			}
+
 			$t_relationship['type'] = $t_reltype;
 
 			if( ApiObjectFactory::$soap ) {
@@ -563,10 +570,25 @@ function mci_issue_get_relationships( $p_issue_id, $p_user_id ) {
 			$t_relationship = array();
 			$t_relationship['id'] = (int)$t_relship_row->id;
 			$t_reltype = array();
-			$t_reltype['id'] = (int)relationship_get_complementary_type( $t_relship_row->type );
-			$t_reltype['name'] = relationship_get_description_dest_side( $t_relship_row->type );
+			$t_complementary_type_id = (int)relationship_get_complementary_type( $t_relship_row->type );
+			$t_reltype['id'] = $t_complementary_type_id;
+
+			if( ApiObjectFactory::$soap ) {
+				$t_reltype['name'] = relationship_get_description_dest_side( $t_relship_row->type );
+			} else {
+				$t_reltype['name'] = relationship_get_name_for_api( $t_complementary_type_id );
+				$t_reltype['label'] = relationship_get_description_dest_side( $t_relship_row->type );
+			}
+
 			$t_relationship['type'] = $t_reltype;
-			$t_relationship['target_id'] = (int)$t_relship_row->src_bug_id;
+			$t_related_issue_id = (int)$t_relship_row->src_bug_id;
+
+			if( ApiObjectFactory::$soap ) {
+				$t_relationship['target_id'] = $t_related_issue_id;
+			} else {
+				$t_relationship['issue'] = mci_related_issue_as_array_by_id( $t_related_issue_id );
+			}
+
 			$t_relationships[] = $t_relationship;
 		}
 	}