feat(mp): 小程序统一组件库 Phase 1 — Token 扩展 + 10 组件 + useListPage Hook

三层架构组件库：
- 第 1 层原子组件：PageShell/ContentCard/StatusTag/SectionTitle/LoadingCard
- 第 2 层组合模式：PageHeader/SearchSection/CardList/PaginationBar
- 第 3 层 Hook：useListPage（列表页通用逻辑抽象）

Token 扩展：新增 --tk-card-*/--tk-gap-*/--tk-page-* 等结构化 CSS 变量，
关怀模式通过变量覆写自动生效，新组件零额外代码即获关怀支持。

设计规格：docs/superpowers/specs/2026-05-16-miniprogram-unified-components-design.md

apps/miniprogram/src/components/ui/ContentCard/index.scss

@@ -0,0 +1,34 @@
+@import '../../styles/variables';
+
+.content-card {
+  background: var(--tk-card-bg);
+  border-radius: var(--tk-card-radius);
+  box-shadow: $shadow-sm;
+  margin-bottom: var(--tk-gap-md);
+  transition: background 0.15s, opacity 0.15s, transform 0.15s;
+
+  &--outlined {
+    box-shadow: none;
+    border: 1px solid $bd;
+  }
+
+  &--elevated {
+    box-shadow: $shadow-md;
+  }
+
+  &--pressable {
+    cursor: pointer;
+  }
+
+  &--feedback-bg.content-card--pressable:active {
+    background: $bd-l;
+  }
+
+  &--feedback-opacity.content-card--pressable:active {
+    opacity: var(--tk-touch-feedback-opacity);
+  }
+
+  &--feedback-scale.content-card--pressable:active {
+    transform: scale(0.98);
+  }
+}

apps/miniprogram/src/components/ui/ContentCard/index.tsx

@@ -0,0 +1,52 @@
+import { View } from '@tarojs/components';
+import { CSSProperties, ReactNode, useMemo } from 'react';
+import './index.scss';
+
+interface ContentCardProps {
+  variant?: 'default' | 'outlined' | 'elevated';
+  onPress?: () => void;
+  padding?: 'none' | 'sm' | 'md' | 'lg';
+  activeFeedback?: 'bg' | 'opacity' | 'scale' | 'none';
+  className?: string;
+  style?: CSSProperties;
+  children: ReactNode;
+}
+
+const PADDING_MAP = {
+  none: '0',
+  sm: '12px',
+  md: 'var(--tk-card-padding)',
+  lg: '32px',
+} as const;
+
+const ContentCard: React.FC<ContentCardProps> = ({
+  variant = 'default',
+  onPress,
+  padding = 'md',
+  activeFeedback = 'bg',
+  className,
+  style,
+  children,
+}) => {
+  const innerStyle = useMemo(() => ({
+    padding: PADDING_MAP[padding],
+    ...style,
+  }), [padding, style]);
+
+  const hasPress = !!onPress;
+  const cls = [
+    'content-card',
+    `content-card--${variant}`,
+    hasPress && 'content-card--pressable',
+    hasPress && activeFeedback !== 'none' && `content-card--feedback-${activeFeedback}`,
+    className,
+  ].filter(Boolean).join(' ');
+
+  return (
+    <View className={cls} style={innerStyle} onClick={onPress}>
+      {children}
+    </View>
+  );
+};
+
+export default React.memo(ContentCard);