fix: 移除点击模板时不必要的loading状态

- 移除点击模板时立即显示的"选择图片中..."loading提示
- 保留选择图片后上传时的loading状态
- 优化用户体验，避免不必要的loading显示

src/pages/home/index.tsx

@@ -1,4 +1,4 @@
-import { View, Text, ScrollView } from '@tarojs/components'
+import { View, ScrollView } from '@tarojs/components'
 import { useEffect, useState } from 'react'
 import Taro, { navigateTo } from '@tarojs/taro'
 import { useAppDispatch, useAppSelector } from '../../hooks/redux'
@@ -63,12 +63,6 @@ export default function Home() {
     try {
       setLoading(true)
 
-      // 显示loading提示
-      Taro.showLoading({
-        title: '选择图片中...',
-        mask: true
-      })
-
       // 选择并上传图片
       const url = await sdk.chooseAndUploadImage({
         onImageSelected: () => {