feat: 更新统计标签和标题，优化健康数据卡片样式，调整步数和健康相关组件的样式

app/(tabs)/_layout.tsx

@@ -48,7 +48,7 @@ export default function TabLayout() {
                 case 'goals':
                   return { icon: 'flag.fill', title: '习惯' } as const;
                 case 'statistics':
-                  return { icon: 'chart.pie.fill', title: '统计' } as const;
+                  return { icon: 'chart.pie.fill', title: '健康' } as const;
                 case 'personal':
                   return { icon: 'person.fill', title: '个人' } as const;
                 default:
@@ -132,15 +132,15 @@ export default function TabLayout() {
       }}>
 
       <Tabs.Screen
-        name="coach"
+        name="statistics"
         options={{
-          title: 'Seal',
+          title: '统计',
           tabBarIcon: ({ color }) => {
-            const isCoachSelected = pathname === '/coach';
+            const isStatisticsSelected = pathname === '/statistics';
             return (
               <View style={{ flexDirection: 'row', alignItems: 'center' }}>
-                <IconSymbol size={22} name="person.3.fill" color={color} />
-                {isCoachSelected && (
+                <IconSymbol size={22} name="chart.pie.fill" color={color} />
+                {isStatisticsSelected && (
                   <Text
                     numberOfLines={1}
                     style={{
@@ -151,7 +151,7 @@ export default function TabLayout() {
                       textAlign: 'center',
                       flexShrink: 0,
                     }}>
-                    Seal
+                    健康
                   </Text>
                 )}
               </View>
@@ -188,17 +188,16 @@ export default function TabLayout() {
           },
         }}
       />
-
       <Tabs.Screen
-        name="statistics"
+        name="coach"
         options={{
-          title: '统计',
+          title: 'Seal',
           tabBarIcon: ({ color }) => {
-            const isStatisticsSelected = pathname === '/statistics';
+            const isCoachSelected = pathname === '/coach';
             return (
               <View style={{ flexDirection: 'row', alignItems: 'center' }}>
-                <IconSymbol size={22} name="chart.pie.fill" color={color} />
-                {isStatisticsSelected && (
+                <IconSymbol size={22} name="person.3.fill" color={color} />
+                {isCoachSelected && (
                   <Text
                     numberOfLines={1}
                     style={{
@@ -209,7 +208,7 @@ export default function TabLayout() {
                       textAlign: 'center',
                       flexShrink: 0,
                     }}>
-                    统计
+                    Seal
                   </Text>
                 )}
               </View>
@@ -217,6 +216,7 @@ export default function TabLayout() {
           },
         }}
       />
+
       <Tabs.Screen
         name="goals"
         options={{

app/(tabs)/statistics.tsx

@@ -300,8 +300,6 @@ export default function ExploreScreen() {
           contentContainerStyle={{ paddingBottom: bottomPadding }}
           showsVerticalScrollIndicator={false}
         >
-          {/* 体重历史记录卡片 */}
-          <Text style={styles.sectionTitle}>健康数据</Text>
           <WeightHistoryCard />
 
           {/* 日期选择器 */}
@@ -617,7 +615,6 @@ const styles = StyleSheet.create({
   },
   cardTitle: {
     fontSize: 14,
-    fontWeight: '800',
     color: '#192126',
   },
   heartCard: {