feat(family): 新增 FamilyCard 家庭圈卡片组件

src/components/family-card/index.module.scss

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+// 浅绿底卡变体：卡身浅绿 + 右上淡绿圆装饰（spec §9）
+.card {
+  position: relative;
+  overflow: hidden;
+  background: $color-primary-light-bg;
+  border: 1px solid $color-primary-light-border;
+  border-radius: $radius-lg;
+  padding: 32px;
+}
+
+.cardPressed {
+  opacity: 0.85;
+}
+
+// 装饰圆用真实元素而非 ::after：小程序部分场景伪元素渲染兼容性差
+.decor {
+  position: absolute;
+  top: -60px;
+  right: -60px;
+  width: 240px;
+  height: 240px;
+  border-radius: $radius-circle;
+  background: rgba(44, 203, 152, 0.08);
+}
+
+.head {
+  display: flex;
+  align-items: center;
+  margin-bottom: 24px;
+}
+
+// 圆图标：品牌渐变底 + 白字首字，对齐设备网格 icon 风格
+.icon {
+  width: 88px;
+  height: 88px;
+  border-radius: $radius-circle;
+  background: $color-primary-grad;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  margin-right: 20px;
+}
+
+.iconText {
+  font-size: 36px;
+  font-weight: 600;
+  color: #ffffff;
+}
+
+.headMain {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  align-items: center;
+}
+
+.name {
+  flex: 1;
+  min-width: 0;
+  font-size: 32px;
+  font-weight: 600;
+  color: $color-text;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+// 人数徽标：白底胶囊——浅绿卡身上无米色 token，白底对比最清晰
+.memberBadge {
+  flex-shrink: 0;
+  margin-left: 16px;
+  padding: 4px 16px;
+  background: $color-bg-white;
+  border: 1px solid $color-primary-light-border;
+  border-radius: $radius-pill;
+  font-size: 22px;
+  color: $color-primary-deep;
+}
+
+.rows {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  min-height: 56px;
+}
+
+.rowLabel {
+  font-size: 26px;
+  color: $color-text-secondary;
+}
+
+.rowValue {
+  margin-left: 24px;
+  font-size: 26px;
+  color: $color-text;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}

src/components/family-card/index.tsx

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+import { View, Text } from '@tarojs/components'
+import type { Family } from '@/api/family'
+import styles from './index.module.scss'
+
+interface Props {
+  family: Family
+  onClick?: (id: string) => void
+}
+
+export function FamilyCard({ family, onClick }: Props) {
+  const first = family.name.slice(0, 1)
+
+  return (
+    <View
+      className={styles.card}
+      hoverClass={onClick ? styles.cardPressed : 'none'}
+      onClick={() => onClick?.(family.id)}
+    >
+      {/* 右上淡绿圆装饰 */}
+      <View className={styles.decor} />
+      <View className={styles.head}>
+        <View className={styles.icon}>
+          <Text className={styles.iconText}>{first}</Text>
+        </View>
+        <View className={styles.headMain}>
+          <Text className={styles.name}>{family.name}</Text>
+          <Text className={styles.memberBadge}>{family.memberCount} 人</Text>
+        </View>
+      </View>
+      <View className={styles.rows}>
+        <Text className={styles.rowLabel}>关爱对象</Text>
+        <Text className={styles.rowValue}>{family.caredLabel}</Text>
+      </View>
+      <View className={styles.rows}>
+        <Text className={styles.rowLabel}>关爱地址</Text>
+        <Text className={styles.rowValue}>{family.address}</Text>
+      </View>
+      <View className={styles.rows}>
+        <Text className={styles.rowLabel}>设备数量</Text>
+        <Text className={styles.rowValue}>{family.deviceCount}</Text>
+      </View>
+    </View>
+  )
+}