feat(login): 根据键盘状态调整登录按钮位置

- 添加键盘可见性检测功能
- 在键盘弹出时隐藏登录按钮
- 使用 Vue 生命周期钩子监听窗口大小变化

app/pages/login/index.vue

@@ -141,6 +141,23 @@ const goLogin =async () => {
   }
   loadingRef.value.loading2=false
 }
+const isKeyboardVisible = ref(false)
+const windowHeight = ref(window.innerHeight)
+
+onMounted(() => {
+  // 记录初始窗口高度
+  windowHeight.value = window.innerHeight
+
+  // 监听窗口大小变化
+  window.addEventListener('resize', () => {
+    // 如果当前高度明显小于初始高度，认为键盘已打开
+    isKeyboardVisible.value = window.innerHeight < windowHeight.value * 0.8
+  })
+})
+
+onUnmounted(() => {
+  window.removeEventListener('resize', () => {})
+})
 </script>
 
 <template>
@@ -202,7 +219,7 @@ const goLogin =async () => {
       </van-swipe-item>
     </van-swipe>
     <van-number-keyboard v-model="code" :show="showKeyboard" @blur="showKeyboard = false" />
-    <div class="text-center text-14px absolute left-1/2 transform translate-x--1/2 top-630px">
+    <div v-if="!isKeyboardVisible" class="text-center text-14px absolute left-1/2 transform translate-x--1/2 bottom-20px">
       登录即同意<span class="text-#3454AF " @click="$router.push('/privacyPolicy')">《隐私政策》</span>
     </div>
   </div>