fix: 修复浮动按钮水平排列问题

- 为 #float_action_buttons 添加 flex-direction: column
- 确保按钮垂直排列在右下角

style.css

@@ -3088,6 +3088,12 @@ html.darkmode .wp-block-calendar tbody td {
 
 	transition: all var(--animation-normal) var(--ease-standard);
 	
+	display: flex;
+	
+	flex-direction: column;
+	
+	align-items: center;
+
 }
 
 #float_action_buttons.fabtns-float-left {