fix: Handle rich message signatures & attachment overflow (#13045)

app/javascript/dashboard/components/widgets/WootWriter/Editor.vue

@@ -370,7 +370,7 @@ function addSignature() {
   // see if the content is empty, if it is before appending the signature
   // we need to add a paragraph node and move the cursor at the start of the editor
   const contentWasEmpty = isBodyEmpty(content);
-  content = appendSignature(content, props.signature);
+  content = appendSignature(content, props.signature, props.channelType);
   // need to reload first, ensuring that the editorView is updated
   reloadState(content);