feat: restructure mobile template for better layout and user guidance; remove unused emoji converter from home component

pages/app/mobile/index.vue

@@ -1 +1,6 @@
-<template>目前沒有手機版本</template>
+<template>
+    <div class="justify-center align-center text-center">
+        <span class="text-6xl text-bold">目前沒有手機版本</span>
+        <span class="text-xl">請使用電腦版</span>
+    </div>
+</template>

pages/home.vue

@@ -1,5 +1,4 @@
 <script setup lang="ts">
-import EmojiConvertor from "emoji-js";
 import { gsap } from "gsap";
 import { TextPlugin } from "gsap/TextPlugin";
 gsap.registerPlugin(TextPlugin);
@@ -16,8 +15,6 @@ const messages = [
   "BlindSpec",
 ];
 
-const emoji = new EmojiConvertor();
-
 onMounted(() => {
   const tl = gsap.timeline({ repeat: -1 });
   messages.forEach((message) => {