fix: Incorrect empty check for collection description results in large empty space below title

shared/utils/ProsemirrorHelper.ts

@@ -52,6 +52,30 @@ export class ProsemirrorHelper {
     };
   }
 
+  /**
+   * Returns true if the data looks like an empty document.
+   *
+   * @param data The ProsemirrorData to check.
+   * @returns True if the document is empty.
+   */
+  static isEmptyData(data: ProsemirrorData): boolean {
+    if (data.type !== "doc") {
+      return false;
+    }
+
+    if (data.content.length === 1) {
+      const node = data.content[0];
+      return (
+        node.type === "paragraph" &&
+        (node.content === null ||
+          node.content === undefined ||
+          node.content.length === 0)
+      );
+    }
+
+    return data.content.length === 0;
+  }
+
   /**
    * Returns the node as plain text.
    *