feat: 更新 AI 教练聊天界面和个人信息页面

- 在 AI 教练聊天界面中添加训练记录分析功能，允许用户基于近期训练记录获取分析建议
- 更新 Redux 状态管理，集成每日步数和卡路里目标
- 在个人信息页面中优化用户头像显示，支持从库中选择头像
- 修改首页布局，添加可拖动的教练徽章，提升用户交互体验
- 更新样式以适应新功能的展示和交互

app/(tabs)/explore.tsx

@@ -3,6 +3,7 @@ import { CircularRing } from '@/components/CircularRing';
 import { ProgressBar } from '@/components/ProgressBar';
 import { Colors } from '@/constants/Colors';
 import { getTabBarBottomPadding } from '@/constants/TabBar';
+import { useAppSelector } from '@/hooks/redux';
 import { useColorScheme } from '@/hooks/useColorScheme';
 import { getMonthDaysZh, getMonthTitleZh, getTodayIndexInMonth } from '@/utils/date';
 import { ensureHealthPermissions, fetchHealthDataForDate, fetchTodayHealthData } from '@/utils/health';
@@ -23,6 +24,7 @@ import { useSafeAreaInsets } from 'react-native-safe-area-context';
 export default function ExploreScreen() {
   const theme = (useColorScheme() ?? 'light') as 'light' | 'dark';
   const colorTokens = Colors[theme];
+  const stepGoal = useAppSelector((s) => s.user.profile?.dailyStepsGoal) ?? 2000;
   // 使用 dayjs：当月日期与默认选中“今天”
   const days = getMonthDaysZh();
   const [selectedIndex, setSelectedIndex] = useState(getTodayIndexInMonth());
@@ -185,13 +187,13 @@ export default function ExploreScreen() {
                     value={stepCount}
                     resetToken={animToken}
                     style={styles.stepsValue}
-                    format={(v) => `${Math.round(v)}/2000`}
+                    format={(v) => `${Math.round(v)}/${stepGoal}`}
                   />
                 ) : (
-                  <Text style={styles.stepsValue}>——/2000</Text>
+                  <Text style={styles.stepsValue}>——/{stepGoal}</Text>
                 )}
                 <ProgressBar
-                  progress={Math.min(1, Math.max(0, (stepCount ?? 0) / 2000))}
+                  progress={Math.min(1, Math.max(0, (stepCount ?? 0) / stepGoal))}
                   height={18}
                   trackColor="#FFEBCB"
                   fillColor="#FFC365"

app/(tabs)/index.tsx

@@ -9,7 +9,8 @@ import { useAuthGuard } from '@/hooks/useAuthGuard';
 import { getChineseGreeting } from '@/utils/date';
 import { useRouter } from 'expo-router';
 import React from 'react';
-import { Pressable, SafeAreaView, ScrollView, StyleSheet, View } from 'react-native';
+import { Animated, Image, PanResponder, Pressable, SafeAreaView, ScrollView, StyleSheet, useWindowDimensions, View } from 'react-native';
+import { useSafeAreaInsets } from 'react-native-safe-area-context';
 
 // 移除旧的“热门活动”滑动数据，改为固定的“热点功能”卡片
 
@@ -18,9 +19,108 @@ export default function HomeScreen() {
   const { pushIfAuthedElseLogin } = useAuthGuard();
   const theme = (useColorScheme() ?? 'light') as 'light' | 'dark';
   const colorTokens = Colors[theme];
+  const insets = useSafeAreaInsets();
+  const { width: windowWidth, height: windowHeight } = useWindowDimensions();
+
+  // Draggable coach badge state
+  const pan = React.useRef(new Animated.ValueXY()).current;
+  const [coachSize, setCoachSize] = React.useState({ width: 0, height: 0 });
+  const hasInitPos = React.useRef(false);
+  const startRef = React.useRef({ x: 0, y: 0 });
+  const dragState = React.useRef({ moved: false });
+
+  const clamp = (value: number, min: number, max: number) => Math.max(min, Math.min(max, value));
+
+  const panResponder = React.useMemo(() => PanResponder.create({
+    onStartShouldSetPanResponder: () => true,
+    onMoveShouldSetPanResponder: (_evt, gesture) => Math.abs(gesture.dx) + Math.abs(gesture.dy) > 2,
+    onPanResponderGrant: () => {
+      dragState.current.moved = false;
+      // @ts-ignore access current value
+      const currentX = (pan.x as any)._value ?? 0;
+      // @ts-ignore access current value
+      const currentY = (pan.y as any)._value ?? 0;
+      startRef.current = { x: currentX, y: currentY };
+    },
+    onPanResponderMove: (_evt, gesture) => {
+      if (!dragState.current.moved && (Math.abs(gesture.dx) + Math.abs(gesture.dy) > 4)) {
+        dragState.current.moved = true;
+      }
+      const nextX = startRef.current.x + gesture.dx;
+      const nextY = startRef.current.y + gesture.dy;
+      pan.setValue({ x: nextX, y: nextY });
+    },
+    onPanResponderRelease: (_evt, gesture) => {
+      const minX = 8;
+      const minY = insets.top + 2;
+      const maxX = Math.max(minX, windowWidth - coachSize.width - 8);
+      const maxY = Math.max(minY, windowHeight - coachSize.height - (insets.bottom + 8));
+      const rawX = startRef.current.x + gesture.dx;
+      const rawY = startRef.current.y + gesture.dy;
+      const clampedX = clamp(rawX, minX, maxX);
+      const clampedY = clamp(rawY, minY, maxY);
+      // Snap horizontally to nearest side (left/right only)
+      const distLeft = Math.abs(clampedX - minX);
+      const distRight = Math.abs(maxX - clampedX);
+      const snapX = distLeft <= distRight ? minX : maxX;
+      Animated.spring(pan, { toValue: { x: snapX, y: clampedY }, useNativeDriver: false, bounciness: 6 }).start(() => {
+        if (!dragState.current.moved) {
+          // Treat as tap
+          // @ts-ignore - expo-router string ok
+          router.push('/ai-coach-chat?name=Iris' as any);
+        }
+      });
+    },
+  }), [coachSize.height, coachSize.width, insets.bottom, insets.top, pan, windowHeight, windowWidth, router]);
   return (
     <SafeAreaView style={[styles.safeArea, { backgroundColor: theme === 'light' ? colorTokens.pageBackgroundEmphasis : colorTokens.background }]}>
       <ThemedView style={[styles.container, { backgroundColor: theme === 'light' ? colorTokens.pageBackgroundEmphasis : colorTokens.background }]}>
+        {/* Floating Coach Badge */}
+        <View pointerEvents="box-none" style={styles.coachOverlayWrap}>
+          <Animated.View
+            {...panResponder.panHandlers}
+            onLayout={(e) => {
+              const { width, height } = e.nativeEvent.layout;
+              if (width !== coachSize.width || height !== coachSize.height) {
+                setCoachSize({ width, height });
+              }
+              if (!hasInitPos.current && width > 0 && windowWidth > 0) {
+                const initX = windowWidth - width - 14;
+                const initY = insets.top + 2; // 默认更靠上，避免遮挡搜索框
+                pan.setValue({ x: initX, y: initY });
+                hasInitPos.current = true;
+              }
+            }}
+            style={[
+              styles.coachBadge,
+              {
+                transform: [{ translateX: pan.x }, { translateY: pan.y }],
+                backgroundColor: colorTokens.heroSurfaceTint,
+                borderColor: 'rgba(187,242,70,0.35)',
+                shadowColor: '#000',
+                shadowOpacity: 0.08,
+                shadowRadius: 10,
+                shadowOffset: { width: 0, height: 4 },
+                elevation: 3,
+                position: 'absolute',
+                left: 0,
+                top: 0,
+              },
+            ]}
+          >
+            <Image
+              source={{ uri: 'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/avatar/imageCoach01.jpeg' }}
+              style={styles.coachAvatar}
+            />
+            <View style={styles.coachMeta}>
+              <ThemedText style={styles.coachName}>Iris</ThemedText>
+              <View style={styles.coachStatusRow}>
+                <View style={styles.statusDot} />
+                <ThemedText style={styles.coachStatusText}>在线</ThemedText>
+              </View>
+            </View>
+          </Animated.View>
+        </View>
         <ScrollView showsVerticalScrollIndicator={false}>
           {/* Header Section */}
           <View style={styles.header}>
@@ -66,7 +166,7 @@ export default function HomeScreen() {
 
             <View style={styles.planList}>
               <PlanCard
-                image={'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/Imagettpg.png'}
+                image={'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/imagedemo.jpeg'}
                 title="体态评估"
                 subtitle="评估你的体态，制定训练计划"
                 level="初学者"
@@ -77,7 +177,6 @@ export default function HomeScreen() {
                   image={'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/Image30play@2x.png'}
                   title="每周打卡"
                   subtitle="养成训练习惯，练出好身材"
-                  level="初学者"
                   progress={0.75}
                 />
               </Pressable>
@@ -92,7 +191,7 @@ export default function HomeScreen() {
               </Pressable>
               <Pressable onPress={() => pushIfAuthedElseLogin('/checkin')}>
                 <PlanCard
-                  image={'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/Image30play@2x.png'}
+                  image={'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/ImageCheck.jpeg'}
                   title="每日打卡（自选动作）"
                   subtitle="选择动作，设置组数/次数，记录完成"
                   level="初学者"
@@ -126,6 +225,14 @@ const styles = StyleSheet.create({
     paddingTop: 16,
     paddingBottom: 8,
   },
+  coachOverlayWrap: {
+    position: 'absolute',
+    top: 0,
+    left: 0,
+    right: 0,
+    bottom: 0,
+    zIndex: 10,
+  },
   greeting: {
     fontSize: 16,
     color: '#8A8A8E',
@@ -138,6 +245,45 @@ const styles = StyleSheet.create({
     color: '#1A1A1A',
     lineHeight: 36,
   },
+  coachBadge: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    // RN 不完全支持 gap，这里用 margin 实现
+    paddingHorizontal: 10,
+    paddingVertical: 8,
+    borderRadius: 20,
+    borderWidth: 1,
+    backgroundColor: '#FFFFFF00',
+  },
+  coachAvatar: {
+    width: 26,
+    height: 26,
+    borderRadius: 13,
+  },
+  coachMeta: {
+    marginLeft: 8,
+  },
+  coachName: {
+    fontSize: 13,
+    fontWeight: '700',
+    color: '#192126',
+  },
+  coachStatusRow: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    marginTop: 2,
+  },
+  statusDot: {
+    width: 6,
+    height: 6,
+    borderRadius: 3,
+    backgroundColor: '#22C55E',
+    marginRight: 4,
+  },
+  coachStatusText: {
+    fontSize: 11,
+    color: '#6B7280',
+  },
   sectionContainer: {
     marginTop: 24,
   },

app/(tabs)/personal.tsx

@@ -2,6 +2,7 @@ import { Colors } from '@/constants/Colors';
 import { getTabBarBottomPadding } from '@/constants/TabBar';
 import { useAppSelector } from '@/hooks/redux';
 import { useColorScheme } from '@/hooks/useColorScheme';
+import { DEFAULT_MEMBER_NAME } from '@/store/userSlice';
 import { Ionicons } from '@expo/vector-icons';
 import AsyncStorage from '@react-native-async-storage/async-storage';
 import { useBottomTabBarHeight } from '@react-navigation/bottom-tabs';
@@ -9,7 +10,7 @@ import { useFocusEffect } from '@react-navigation/native';
 import type { Href } from 'expo-router';
 import { router } from 'expo-router';
 import React, { useEffect, useMemo, useState } from 'react';
-import { Alert, SafeAreaView, ScrollView, StatusBar, StyleSheet, Switch, Text, TouchableOpacity, View } from 'react-native';
+import { Alert, Image, SafeAreaView, ScrollView, StatusBar, StyleSheet, Switch, Text, TouchableOpacity, View } from 'react-native';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
 
 export default function PersonalScreen() {
@@ -24,6 +25,7 @@ export default function PersonalScreen() {
   const colors = Colors[colorScheme ?? 'light'];
   const theme = (colorScheme ?? 'light') as 'light' | 'dark';
   const colorTokens = Colors[theme];
+  const DEFAULT_AVATAR_URL = 'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/avatar/avatarGirl01.jpeg';
 
   type UserProfile = {
     fullName?: string;
@@ -117,25 +119,21 @@ export default function PersonalScreen() {
   };
 
 
+  const displayName = (profile.fullName && profile.fullName.trim()) ? profile.fullName : DEFAULT_MEMBER_NAME;
+
   const UserInfoSection = () => (
-    <View style={styles.userInfoCard}>
+    <View style={[styles.userInfoCard, { backgroundColor: colorTokens.card }]}>
       <View style={styles.userInfoContainer}>
         {/* 头像 */}
         <View style={styles.avatarContainer}>
-          <View style={styles.avatar}>
-            <View style={styles.avatarContent}>
-              {/* 简单的头像图标，您可以替换为实际图片 */}
-              <View style={styles.avatarIcon}>
-                <View style={styles.avatarFace} />
-                <View style={styles.avatarBody} />
-              </View>
-            </View>
+          <View style={[styles.avatar, { backgroundColor: colorTokens.ornamentAccent }]}>
+            <Image source={{ uri: profile.avatarUri || DEFAULT_AVATAR_URL }} style={{ width: '100%', height: '100%' }} />
           </View>
         </View>
 
         {/* 用户信息 */}
         <View style={styles.userDetails}>
-          <Text style={styles.userName}>{profile.fullName || '未设置姓名'}</Text>
+          <Text style={[styles.userName, { color: colorTokens.text }]}>{displayName}</Text>
         </View>
 
         {/* 编辑按钮 */}
@@ -147,25 +145,25 @@ export default function PersonalScreen() {
   );
 
   const StatsSection = () => (
-    <View style={styles.statsContainer}>
+    <View style={[styles.statsContainer, { backgroundColor: colorTokens.card }]}>
       <View style={styles.statItem}>
         <Text style={dynamicStyles.statValue}>{formatHeight()}</Text>
-        <Text style={styles.statLabel}>身高</Text>
+        <Text style={[styles.statLabel, { color: colorTokens.textMuted }]}>身高</Text>
       </View>
       <View style={styles.statItem}>
         <Text style={dynamicStyles.statValue}>{formatWeight()}</Text>
-        <Text style={styles.statLabel}>体重</Text>
+        <Text style={[styles.statLabel, { color: colorTokens.textMuted }]}>体重</Text>
       </View>
       <View style={styles.statItem}>
         <Text style={dynamicStyles.statValue}>{formatAge()}</Text>
-        <Text style={styles.statLabel}>年龄</Text>
+        <Text style={[styles.statLabel, { color: colorTokens.textMuted }]}>年龄</Text>
       </View>
     </View>
   );
 
   const MenuSection = ({ title, items }: { title: string; items: any[] }) => (
-    <View style={styles.menuSection}>
-      <Text style={styles.sectionTitle}>{title}</Text>
+    <View style={[styles.menuSection, { backgroundColor: colorTokens.card }]}>
+      <Text style={[styles.sectionTitle, { color: colorTokens.text }]}>{title}</Text>
       {items.map((item, index) => (
         <TouchableOpacity
           key={index}
@@ -173,10 +171,10 @@ export default function PersonalScreen() {
           onPress={item.onPress}
         >
           <View style={styles.menuItemLeft}>
-            <View style={[styles.menuIcon]}>
-              <Ionicons name={item.icon} size={20} color={item.iconColor || colors.primary} />
+            <View style={[styles.menuIcon, { backgroundColor: 'rgba(187,242,70,0.12)' }]}>
+              <Ionicons name={item.icon} size={20} color={'#192126'} />
             </View>
-            <Text style={styles.menuItemText}>{item.title}</Text>
+            <Text style={[styles.menuItemText, { color: colorTokens.text }]}>{item.title}</Text>
           </View>
           {item.type === 'switch' ? (
             <Switch
@@ -187,7 +185,7 @@ export default function PersonalScreen() {
               style={styles.switch}
             />
           ) : (
-            <Ionicons name="chevron-forward" size={20} color="#C4C4C4" />
+            <Ionicons name="chevron-forward" size={20} color={colorTokens.icon} />
           )}
         </TouchableOpacity>
       ))}
@@ -290,7 +288,7 @@ export default function PersonalScreen() {
 
   return (
     <View style={[styles.container, { backgroundColor: theme === 'light' ? colorTokens.pageBackgroundEmphasis : colorTokens.background }]}>
-      <StatusBar barStyle="dark-content" backgroundColor="transparent" translucent />
+      <StatusBar barStyle={theme === 'light' ? 'dark-content' : 'light-content'} backgroundColor="transparent" translucent />
       <SafeAreaView style={[styles.safeArea, { backgroundColor: theme === 'light' ? colorTokens.pageBackgroundEmphasis : colorTokens.background }]}>
         <ScrollView
           style={[styles.scrollView, { backgroundColor: theme === 'light' ? colorTokens.pageBackgroundEmphasis : colorTokens.background }]}
@@ -333,6 +331,15 @@ const styles = StyleSheet.create({
   userInfoCard: {
     borderRadius: 16,
     marginBottom: 20,
+    backgroundColor: '#FFFFFF',
+    shadowColor: '#000',
+    shadowOffset: {
+      width: 0,
+      height: 2,
+    },
+    shadowOpacity: 0.08,
+    shadowRadius: 6,
+    elevation: 3,
   },
   userInfoContainer: {
     flexDirection: 'row',
@@ -380,7 +387,7 @@ const styles = StyleSheet.create({
   userName: {
     fontSize: 18,
     fontWeight: 'bold',
-    color: '#000',
+    color: '#192126',
     marginBottom: 4,
   },
 
@@ -408,18 +415,19 @@ const styles = StyleSheet.create({
 
   statLabel: {
     fontSize: 12,
-    color: '#888',
+    color: '#687076',
   },
   // 菜单区域
   menuSection: {
     marginBottom: 20,
     backgroundColor: '#FFFFFF',
     padding: 16,
+    borderRadius: 16,
   },
   sectionTitle: {
-    fontSize: 18,
-    fontWeight: 'bold',
-    color: '#000',
+    fontSize: 20,
+    fontWeight: '800',
+    color: '#192126',
     marginBottom: 12,
     paddingHorizontal: 4,
   },
@@ -447,7 +455,7 @@ const styles = StyleSheet.create({
   },
   menuItemText: {
     fontSize: 16,
-    color: '#000',
+    color: '#192126',
     flex: 1,
   },
   switch: {