fix(FloatingButtons): hide btns until first mousemove

Signed-off-by: silver <s.szmajduch@posteo.de>
Assisted-by: ClaudeCode:claude-fable-5

Author: silverkszlo

src/components/Editor/FloatingButtons.vue

@@ -68,6 +68,13 @@ export default {
 		},
 	},
 
+	mounted() {
+		// Start hidden until the drag handle plugin positions the buttons on
+		// first mousemove. The Vue 3 wrapper of @tiptap/extension-drag-handle
+		// does that internally, so this is not needed on NC v35 onwards.
+		this.$el.style.visibility = 'hidden'
+	},
+
 	methods: {
 		onNodeChange({ node, pos }) {
 			this.node = node