✨ feat: 完整应用重构 - 优化界面架构与用户体验

主要变更：
- 重构应用界面：优化首页、登录、认证流程
- 新增用户档案模块：包含完整的档案管理组件
- 优化路由结构：重新组织页面布局和导航
- 改进API集成：新增活动、内容分类等API模块
- 删除冗余组件：清理不必要的文件和依赖

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/bestai/community-grid.tsx

@@ -1,16 +1,18 @@
+import { Ionicons } from '@expo/vector-icons';
+import { Image as ExpoImage } from 'expo-image';
+import { LinearGradient } from 'expo-linear-gradient';
 import { memo } from 'react';
 import {
   FlatList,
   ListRenderItemInfo,
   Pressable,
+  Image as RNImage,
   StyleProp,
   StyleSheet,
   Text,
   View,
   ViewStyle,
 } from 'react-native';
-import { Image } from 'expo-image';
-import { Ionicons } from '@expo/vector-icons';
 
 export type CommunityItem = {
   id: string;
@@ -26,22 +28,43 @@ type CommunityGridProps = {
   onPressAction?: (item: CommunityItem) => void;
 };
 
+const EMPTY_ITEM: CommunityItem = {
+  id: 'empty',
+  title: '',
+  image: '',
+  chip: '',
+  actionLabel: '',
+};
+
 export function CommunityGrid({ items, onPressCard, onPressAction }: CommunityGridProps) {
   const renderItem = ({ item, index }: ListRenderItemInfo<CommunityItem>) => {
+    const isEmpty = item.id === 'empty';
     const isLeftColumn = index % 2 === 0;
+
     return (
-      <CommunityCard
-        item={item}
-        onPressCard={onPressCard}
-        onPressAction={onPressAction}
-        style={[styles.cardWrapper, isLeftColumn ? styles.cardLeft : styles.cardRight]}
-      />
+      <View style={[styles.cardWrapper, isLeftColumn ? styles.cardLeft : styles.cardRight]}>
+        {isEmpty ? (
+          <View style={styles.emptyCard} />
+        ) : (
+          <CommunityCard
+            item={item}
+            onPressCard={onPressCard}
+            onPressAction={onPressAction}
+          />
+        )}
+      </View>
     );
   };
 
+  const data = items.length === 0
+    ? [EMPTY_ITEM, EMPTY_ITEM]
+    : items.length === 1
+    ? [...items, EMPTY_ITEM]
+    : items.slice(0, 4);
+
   return (
     <FlatList
-      data={items}
+      data={data}
       renderItem={renderItem}
       keyExtractor={(item) => item.id}
       numColumns={2}
@@ -62,11 +85,15 @@ type CommunityCardProps = {
 const CommunityCard = memo(({ item, style, onPressCard, onPressAction }: CommunityCardProps) => {
   return (
     <Pressable onPress={() => onPressCard?.(item)} style={[styles.card, style]}>
-      <View>
-        <Image source={{ uri: item.image }} style={styles.cardImage} contentFit="cover" />
+      <View style={styles.imageWrapper}>
+        <ExpoImage source={{ uri: item.image }} style={styles.cardImage} contentFit="cover" />
+        <LinearGradient
+          colors={['rgba(12, 14, 20, 0)', 'rgba(12, 14, 20, 0.85)']}
+          style={styles.imageGradient}
+        />
         <Chip label={item.chip} />
+        <Text style={styles.cardTitle}>{item.title}</Text>
       </View>
-      <Text style={styles.cardTitle}>{item.title}</Text>
       <ActionButton label={item.actionLabel} onPress={() => onPressAction?.(item)} />
     </Pressable>
   );
@@ -80,8 +107,8 @@ type ChipProps = {
 const Chip = memo(({ label }: ChipProps) => {
   return (
     <View style={styles.chip}>
-      <Ionicons name="people-outline" size={14} color="#E5E9F2" style={styles.chipIcon} />
       <Text style={styles.chipText}>{label}</Text>
+      <Ionicons name="people-outline" size={14} color="#F4F7FF" style={styles.chipIcon} />
     </View>
   );
 });
@@ -95,7 +122,11 @@ type ActionButtonProps = {
 const ActionButton = memo(({ label, onPress }: ActionButtonProps) => {
   return (
     <Pressable onPress={onPress} style={({ pressed }) => [styles.button, pressed && styles.buttonPressed]}>
-      <Ionicons name="flash-outline" size={16} color="#050505" style={styles.buttonIcon} />
+      <RNImage
+        source={require('@/assets/icons/start.svg')}
+        style={styles.buttonIcon}
+        resizeMode="contain"
+      />
       <Text style={styles.buttonText}>{label}</Text>
     </Pressable>
   );
@@ -119,61 +150,84 @@ const styles = StyleSheet.create({
   cardRight: {
     marginLeft: 8,
   },
-  card: {
-    backgroundColor: '#101115',
+  emptyCard: {
+    backgroundColor: 'transparent',
     borderRadius: 20,
-    padding: 14,
+  },
+  card: {
+    backgroundColor: '#2E3031',
+    borderRadius: 20,
+    padding: 0,
     borderWidth: 1,
-    borderColor: '#1C1D22',
+    borderColor: '#1B1D24',
+  },
+  imageWrapper: {
+    position: 'relative',
+    borderRadius: 16,
+    overflow: 'hidden',
+    marginBottom: 0,
   },
   cardImage: {
     width: '100%',
-    height: 148,
-    borderRadius: 16,
-    marginBottom: 14,
+    aspectRatio: 9 / 16,
+    height: undefined,
+  },
+  imageGradient: {
+    position: 'absolute',
+    left: 0,
+    right: 0,
+    bottom: 0,
+    height: 88,
   },
   cardTitle: {
-    fontSize: 13,
-    letterSpacing: 0.8,
+    position: 'absolute',
+    left: 16,
+    bottom: 18,
+    fontSize: 14,
+    letterSpacing: 1,
+    fontWeight: '700',
     color: '#F5F8FF',
-    marginBottom: 12,
+    textTransform: 'uppercase',
   },
   chip: {
     position: 'absolute',
-    top: 12,
-    right: 12,
-    backgroundColor: 'rgba(5, 5, 5, 0.72)',
-    borderRadius: 14,
+    top: 14,
+    right: 14,
+    backgroundColor: 'rgba(27, 43, 78, 0.92)',
+    borderRadius: 16,
     paddingHorizontal: 12,
-    paddingVertical: 4,
+    paddingVertical: 5,
     flexDirection: 'row',
     alignItems: 'center',
   },
   chipIcon: {
-    marginRight: 6,
+    marginLeft: 6,
   },
   chipText: {
-    color: '#C7FF00',
-    fontSize: 11,
-    fontWeight: '700',
+    color: '#E4EBFF',
+    fontSize: 12,
+    fontWeight: '600',
+    letterSpacing: 0.5,
   },
   button: {
     flexDirection: 'row',
     alignItems: 'center',
     justifyContent: 'center',
-    paddingVertical: 10,
-    borderRadius: 14,
-    backgroundColor: '#B7FF2F',
+    paddingVertical: 14,
+    borderRadius: 16,
+    borderWidth: 0,
   },
   buttonPressed: {
-    opacity: 0.9,
+    opacity: 0.85,
   },
   buttonIcon: {
-    marginRight: 4,
+    width: 18,
+    height: 18,
+    marginRight: 8,
   },
   buttonText: {
     fontSize: 14,
     fontWeight: '700',
-    color: '#050505',
+    color: '#C7FF00',
   },
 });