refactor: 注释掉浮动卡片动画逻辑，调整样式以增强视觉效果

app/(tabs)/statistics.tsx

@@ -42,27 +42,27 @@ const FloatingCard = ({ children, delay = 0, style }: {
 }) => {
   const floatAnim = useRef(new Animated.Value(0)).current;
 
-  useEffect(() => {
-    const startAnimation = () => {
-      Animated.loop(
-        Animated.sequence([
-          Animated.timing(floatAnim, {
-            toValue: 1,
-            duration: 3000,
-            delay: delay,
-            useNativeDriver: true,
-          }),
-          Animated.timing(floatAnim, {
-            toValue: 0,
-            duration: 3000,
-            useNativeDriver: true,
-          }),
-        ])
-      ).start();
-    };
+  // useEffect(() => {
+  //   const startAnimation = () => {
+  //     Animated.loop(
+  //       Animated.sequence([
+  //         Animated.timing(floatAnim, {
+  //           toValue: 1,
+  //           duration: 3000,
+  //           delay: delay,
+  //           useNativeDriver: true,
+  //         }),
+  //         Animated.timing(floatAnim, {
+  //           toValue: 0,
+  //           duration: 3000,
+  //           useNativeDriver: true,
+  //         }),
+  //       ])
+  //     ).start();
+  //   };
 
-    startAnimation();
-  }, [floatAnim, delay]);
+  //   startAnimation();
+  // }, [floatAnim, delay]);
 
   const translateY = floatAnim.interpolate({
     inputRange: [0, 1],
@@ -730,6 +730,8 @@ const styles = StyleSheet.create({
     shadowOpacity: 0.12,
     shadowRadius: 12,
     elevation: 6,
+    minHeight: 100,
+    justifyContent: 'center',
   },
   basalMetabolismCardOverride: {
     margin: -16, // 抵消 masonryCard 的 padding

components/StressMeter.tsx

@@ -112,6 +112,7 @@ export function StressMeter({ value, updateTime, style, hrvValue }: StressMeterP
 
 const styles = StyleSheet.create({
   container: {
+    flex: 1,
     shadowColor: '#000',
     shadowOffset: {
       width: 0,