DF-1150: Use error description as the label if it exists

package.json

@@ -87,7 +87,7 @@
   },
   "license": "SEE LICENSE IN LICENSE",
   "dependencies": {
-    "@defra/forms-model": "^3.0.674",
+    "@defra/forms-model": "^3.0.677",
     "@defra/hapi-tracing": "^1.29.0",
     "@defra/interactive-map": "^0.0.22-alpha",
     "@elastic/ecs-pino-format": "^1.5.0",

src/server/plugins/engine/components/FormComponent.ts

@@ -44,10 +44,20 @@ export class FormComponent extends ComponentBase {
 
     this.type = type
     this.hint = hint
-    this.label =
-      'shortDescription' in def && def.shortDescription
-        ? def.shortDescription
-        : def.title
+
+    this.label = this.getLabel(def)
+  }
+
+  getLabel(def: FormComponentsDef) {
+    if ('errorDescription' in def && def.errorDescription) {
+      return def.errorDescription
+    }
+
+    if ('shortDescription' in def && def.shortDescription) {
+      return def.shortDescription
+    }
+
+    return def.title
   }
 
   get keys() {

src/server/plugins/engine/components/TextField.test.ts

@@ -209,7 +209,33 @@ describe('TextField', () => {
   describe('Validation', () => {
     describe.each([
       {
-        description: 'Use short description if it exists',
+        description: 'Use error description if it exists',
+        component: {
+          title: 'What is your example text?',
+          errorDescription: 'Example text',
+          shortDescription: 'Your example text',
+          name: 'myComponent',
+          type: ComponentType.TextField,
+          options: {},
+          schema: {}
+        } satisfies TextFieldComponent,
+        assertions: [
+          {
+            input: getFormData(''),
+            output: {
+              value: getFormData(''),
+              errors: [
+                expect.objectContaining({
+                  text: 'Enter example text'
+                })
+              ]
+            }
+          }
+        ]
+      },
+      {
+        description:
+          'Use short description if it exists and error description does not',
         component: {
           title: 'What is your example text?',
           shortDescription: 'Your example text',