Add placeholder

src/app.css

@@ -197,7 +197,7 @@
 }
 
 .link-content,
-[tag] {
+.tiptap [tag] {
   @apply max-w-full overflow-hidden text-ellipsis whitespace-nowrap rounded bg-neutral px-1 text-neutral-content no-underline;
 }
 
@@ -205,6 +205,14 @@
   @apply bg-primary text-primary-content;
 }
 
+.tiptap p.is-editor-empty:first-child::before {
+  content: attr(data-placeholder);
+  float: left;
+  height: 0;
+  pointer-events: none;
+  opacity: 50%;
+}
+
 /* date input */
 
 .date-time-field {