feat: 更新统计页面，优化HRV数据展示和逻辑

- 移除模拟HRV数据，改为从健康数据中获取实际HRV值
- 新增HRV更新时间显示，提升用户信息获取体验
- 优化日期推导逻辑，确保数据加载一致性
- 更新BMI卡片和营养雷达图组件，支持紧凑模式展示
- 移除不再使用的图片资源，简化项目结构

components/NutritionRadarCard.tsx

@@ -9,7 +9,6 @@ import { RadarCategory, RadarChart } from './RadarChart';
 
 export type NutritionRadarCardProps = {
   nutritionSummary: NutritionSummary | null;
-  isLoading?: boolean;
 };
 
 // 营养维度定义
@@ -22,7 +21,7 @@ const NUTRITION_DIMENSIONS: RadarCategory[] = [
   { key: 'sodium', label: '钠' },
 ];
 
-export function NutritionRadarCard({ nutritionSummary, isLoading = false }: NutritionRadarCardProps) {
+export function NutritionRadarCard({ nutritionSummary }: NutritionRadarCardProps) {
   const radarValues = useMemo(() => {
     // 基于推荐日摄入量计算分数
     const recommendations = {
@@ -71,33 +70,26 @@ export function NutritionRadarCard({ nutritionSummary, isLoading = false }: Nutr
         </View>
       </View>
 
-
-      {isLoading ? (
-        <View style={styles.loadingContainer}>
-          <Text style={styles.loadingText}>加载中...</Text>
+      <View style={styles.contentContainer}>
+        <View style={styles.radarContainer}>
+          <RadarChart
+            categories={NUTRITION_DIMENSIONS}
+            values={radarValues}
+            size="small"
+            maxValue={5}
+          />
         </View>
-      ) : (
-        <View style={styles.contentContainer}>
-          <View style={styles.radarContainer}>
-            <RadarChart
-              categories={NUTRITION_DIMENSIONS}
-              values={radarValues}
-              size="small"
-              maxValue={5}
-            />
-          </View>
 
-          <View style={styles.statsContainer}>
-            {nutritionStats.map((stat, index) => (
-              <View key={stat.label} style={styles.statItem}>
-                <View style={[styles.statDot, { backgroundColor: stat.color }]} />
-                <Text style={styles.statLabel}>{stat.label}</Text>
-                <Text style={styles.statValue}>{stat.value}</Text>
-              </View>
-            ))}
-          </View>
+        <View style={styles.statsContainer}>
+          {nutritionStats.map((stat, index) => (
+            <View key={stat.label} style={styles.statItem}>
+              <View style={[styles.statDot, { backgroundColor: stat.color }]} />
+              <Text style={styles.statLabel}>{stat.label}</Text>
+              <Text style={styles.statValue}>{stat.value}</Text>
+            </View>
+          ))}
         </View>
-      )}
+      </View>
     </TouchableOpacity>
   );
 }
@@ -176,14 +168,4 @@ const styles = StyleSheet.create({
     color: '#192126',
     fontWeight: '700',
   },
-  loadingContainer: {
-    alignItems: 'center',
-    justifyContent: 'center',
-    height: 80,
-  },
-  loadingText: {
-    fontSize: 16,
-    color: '#9AA3AE',
-    fontWeight: '600',
-  },
 });