disable draw when type

app/javascript/submission_form/signature_step.vue

@@ -145,6 +145,10 @@
           {{ t('clear') }}
         </a>
       </div>
+      <div
+        v-if="isTextSignature"
+        class="absolute top-0 right-0 left-0 bottom-0"
+      />
       <canvas
         v-show="!modelValue && !computedPreviousValue"
         ref="canvas"