refactor: update PreviewColor props to be optional and adjust layout in demos

src/components/common/PreviewColor.vue

@@ -7,7 +7,7 @@
 
 <script setup lang="ts">
 defineProps<{
-  title: string;
+  title?: string;
   modelValue: string;
   disabled?: boolean;
 }>();
@@ -27,7 +27,6 @@ const handleColorChange = (event: Event) => {
   display: flex;
   align-items: center;
   gap: 0.5rem;
-  margin-bottom: 1.5rem;
 }
 
 .color-label {

src/components/landing/Hero/Hero.vue

@@ -31,7 +31,7 @@
         split-type="words"
         :delay="10"
         :duration="1"
-        text="Eighty-plus snippets, ready to be dropped into your Vue projects"
+        text="Sixty-plus snippets, ready to be dropped into your Vue projects"
       />
 
       <router-link to="/text-animations/split-text" class="landing-button">