Component({
  properties: {
    active: { type: String, value: 'home' } // 'home' | 'category' | 'plan'
  },
  data: {
    items: [
      { key: 'home', label: '首页', emoji: '🏠', page: '/pages/index/index' },
      { key: 'category', label: '分类', emoji: '📚', page: '/pages/category/category' },
      { key: 'plan', label: '计划', emoji: '📋', page: '/pages/collection/collection' }
    ]
  },
  methods: {
    onTap(e) {
      const page = e.currentTarget.dataset.page;
      if (!page) return;
      // 使用 reLaunch 重置页面栈，避免页面层级堆叠
      wx.reLaunch({ url: page });
    }
  }
});