feat: add frontend

frontend/src/views/PlayView.vue

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+<template>
+  <h1>Player</h1>
+</template>

frontend/src/views/TabView.vue

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+<template>
+  <RouterView />
+
+  <van-tabbar route v-model="active">
+    <van-tabbar-item replace name="home" icon="home-o" to="/tab/home"
+      >主页
+    </van-tabbar-item>
+    <van-tabbar-item replace name="bought" icon="like-o" to="/tab/bought"
+      >已购</van-tabbar-item
+    >
+    <van-tabbar-item replace name="me" icon="contact-o" to="/tab/me">我</van-tabbar-item>
+  </van-tabbar>
+</template>
+
+<script setup>
+import { RouterView } from "vue-router";
+</script>

frontend/src/views/tabs/BoughtView.vue

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+<template>
+  <div class="goods">
+    <van-swipe class="goods-swipe" :autoplay="3000">
+      <van-swipe-item v-for="thumb in goods.thumb" :key="thumb">
+        <img :src="thumb" />
+      </van-swipe-item>
+    </van-swipe>
+
+    <van-cell-group>
+      <van-cell>
+        <template #title>
+          <div class="goods-title">{{ goods.title }}</div>
+          <div class="goods-price">{{ formatPrice(goods.price) }}</div>
+        </template>
+      </van-cell>
+      <van-cell class="goods-express">
+        <template #title>
+          <van-col span="10">运费：{{ goods.express }}</van-col>
+          <van-col span="14">剩余：{{ goods.remain }}</van-col>
+        </template>
+      </van-cell>
+    </van-cell-group>
+
+    <van-cell-group class="goods-cell-group">
+      <van-cell value="进入店铺" icon="shop-o" is-link @click="sorry">
+        <template #title>
+          <span class="van-cell-text">有赞的店</span>
+          <van-tag class="goods-tag" type="danger">官方</van-tag>
+        </template>
+      </van-cell>
+      <van-cell title="线下门店" icon="location-o" is-link @click="sorry" />
+    </van-cell-group>
+
+    <van-cell-group class="goods-cell-group">
+      <van-cell title="查看商品详情" is-link @click="sorry" />
+    </van-cell-group>
+  </div>
+</template>
+
+<script>
+export default {
+  data() {
+    return {
+      goods: {
+        title: "美国伽力果213（约680g/3个）",
+        price: 2680,
+        express: "免运费",
+        remain: 19,
+        thumb: [
+          "https://img.yzcdn.cn/public_files/2017/10/24/e5a5a02309a41f9f5def56684808d9ae.jpeg",
+          "https://img.yzcdn.cn/public_files/2017/10/24/1791ba14088f9c2be8c610d0a6cc0f93.jpeg",
+        ],
+      },
+    };
+  },
+
+  methods: {
+    formatPrice() {
+      return "¥" + (this.goods.price / 100).toFixed(2);
+    },
+
+    onClickCart() {
+      this.$router.push("cart");
+    },
+
+    sorry() {
+      showToast("暂无后续逻辑~");
+    },
+  },
+};
+</script>
+
+<style lang="less">
+body {
+  font-size: 16px;
+  background-color: #f8f8f8;
+  -webkit-font-smoothing: antialiased;
+}
+
+.goods {
+  padding-bottom: 50px;
+
+  &-swipe {
+    img {
+      width: 100%;
+      display: block;
+    }
+  }
+
+  &-title {
+    font-size: 16px;
+  }
+
+  &-price {
+    color: #f44;
+  }
+
+  &-express {
+    color: #999;
+    font-size: 12px;
+    padding: 5px 15px;
+  }
+
+  &-cell-group {
+    margin: 15px 0;
+  }
+
+  &-tag {
+    margin-left: 5px;
+  }
+}
+</style>

frontend/src/views/tabs/HomeView.vue

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+<template>
+  <van-search v-model="search" placeholder="请输入搜索关键词" />
+
+  <van-list
+    v-model:loading="loading"
+    :finished="finished"
+    finished-text="没有更多了"
+    @load="onLoad"
+  >
+    <van-card
+      v-for="item in list"
+      :key="item"
+      price="2.00"
+      desc="描述信息"
+      title="商品标题"
+      thumb="https://fastly.jsdelivr.net/van-listt/assets/ipad.jpeg"
+      lazy-load="true"
+      @click="play(item)"
+    >
+      <template #tags>
+        <van-space>
+          <van-tag plain type="primary">视频</van-tag>
+          <van-tag plain type="primary">音频</van-tag>
+          <van-tag plain type="primary">PDF</van-tag>
+        </van-space>
+      </template>
+    </van-card>
+  </van-list>
+</template>
+
+<script setup>
+import { ref } from "vue";
+import { useRouter } from "vue-router";
+
+const router = useRouter();
+
+const search = ref("");
+const list = ref([]);
+const loading = ref(false);
+const finished = ref(false);
+
+const onLoad = () => {
+  // 异步更新数据
+  // setTimeout 仅做示例，真实场景中一般为 ajax 请求
+  setTimeout(() => {
+    for (let i = 0; i < 10; i++) {
+      list.value.push(list.value.length + 1);
+    }
+
+    // 加载状态结束
+    loading.value = false;
+
+    // 数据全部加载完成
+    if (list.value.length >= 40) {
+      finished.value = true;
+    }
+  }, 1000);
+};
+
+const play = (item) => {
+  // vue router goto play view
+  console.log("play", item);
+  router.push({ name: "play", params: { id: item } });
+};
+</script>

frontend/src/views/tabs/MeView.vue

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+<template>
+  <div class="about">
+    <h1>This is an about page</h1>
+  </div>
+</template>