add helper

src/mobile/Helper.vue

@@ -0,0 +1,21 @@
+<script lang="ts" setup>
+import { insertText } from "../composables/helper"
+
+function insert(text: string) {
+  insertText.value = text
+}
+</script>
+<template>
+  <n-flex align="center" class="container">
+    <span>编程助手</span>
+    <n-button size="small" @click="insert(':')">:</n-button>
+    <n-button size="small" @click="insert('=')">=</n-button>
+    <n-button size="small" @click="insert('print')">print</n-button>
+    <n-button size="small" @click="insert('input')">input</n-button>
+  </n-flex>
+</template>
+<style scoped>
+.container {
+  margin-bottom: 10px;
+}
+</style>