feat(i18n): 添加国际化支持和中英文切换功能

- 实现完整的中英文国际化系统，支持动态语言切换
- 新增健康数据权限说明页面，提供HealthKit数据使用说明
- 为服药记录添加庆祝动画效果，提升用户体验
- 优化药品添加页面的阴影效果和视觉层次
- 更新个人页面以支持多语言显示和语言选择模态框

app/medications/add-medication.tsx

@@ -134,6 +134,10 @@ export default function AddMedicationScreen() {
   const glassDisabledTint = useMemo(() => withAlpha(colors.border, theme === 'dark' ? 0.45 : 0.6), [colors.border, theme]);
   const glassPrimaryBackground = useMemo(() => withAlpha(colors.primary, theme === 'dark' ? 0.35 : 0.7), [colors.primary, theme]);
   const glassDisabledBackground = useMemo(() => withAlpha(colors.border, theme === 'dark' ? 0.35 : 0.5), [colors.border, theme]);
+  const cardShadowColor = useMemo(
+    () => (theme === 'dark' ? 'rgba(15, 23, 42, 0.45)' : 'rgba(15, 23, 42, 0.16)'),
+    [theme]
+  );
 
   const [photoPreview, setPhotoPreview] = useState<string | null>(null);
   const [photoUrl, setPhotoUrl] = useState<string | null>(null);
@@ -617,9 +621,10 @@ export default function AddMedicationScreen() {
             <View
               style={[
                 styles.searchField,
+                styles.inputShadow,
                 {
                   backgroundColor: colors.surface,
-                  borderColor: softBorderColor,
+                  shadowColor: cardShadowColor,
                 },
               ]}
             >
@@ -687,9 +692,10 @@ export default function AddMedicationScreen() {
               <View
                 style={[
                   styles.dosageField,
+                  styles.inputShadow,
                   {
-                    borderColor: softBorderColor,
                     backgroundColor: colors.surface,
+                    shadowColor: cardShadowColor,
                   },
                 ]}
               >
@@ -868,7 +874,16 @@ export default function AddMedicationScreen() {
           <View style={styles.stepSection}>
             <View style={styles.inputGroup}>
               <ThemedText style={[styles.groupLabel, { color: colors.textSecondary }]}>备注</ThemedText>
-              <View style={styles.noteInputWrapper}>
+              <View
+                style={[
+                  styles.noteInputWrapper,
+                  styles.inputShadow,
+                  {
+                    backgroundColor: colors.surface,
+                    shadowColor: dictationActive ? colors.primary : cardShadowColor,
+                  },
+                ]}
+              >
                 <TextInput
                   multiline
                   numberOfLines={4}
@@ -879,7 +894,6 @@ export default function AddMedicationScreen() {
                   style={[
                     styles.noteInput,
                     {
-                      borderColor: dictationActive ? colors.primary : softBorderColor,
                       backgroundColor: colors.surface,
                       color: colors.text,
                     },
@@ -1357,10 +1371,17 @@ const styles = StyleSheet.create({
     alignItems: 'center',
     paddingHorizontal: 16,
     borderRadius: 16,
-    borderWidth: 1,
     height: 56,
     gap: 12,
   },
+  inputShadow: {
+    borderWidth: 0,
+    shadowColor: 'rgba(15, 23, 42, 0.16)',
+    shadowOffset: { width: 0, height: 8 },
+    shadowOpacity: 0.12,
+    shadowRadius: 14,
+    elevation: 6,
+  },
   searchInput: {
     flex: 1,
     fontSize: 16,
@@ -1451,7 +1472,6 @@ const styles = StyleSheet.create({
     letterSpacing: 0.2,
   },
   dosageField: {
-    borderWidth: 1,
     borderRadius: 16,
     paddingHorizontal: 16,
     paddingVertical: 12,
@@ -1582,7 +1602,6 @@ const styles = StyleSheet.create({
     fontWeight: '600',
   },
   noteInput: {
-    borderWidth: 1,
     borderRadius: 20,
     padding: 16,
     paddingRight: 72,
@@ -1594,6 +1613,7 @@ const styles = StyleSheet.create({
   },
   noteInputWrapper: {
     position: 'relative',
+    borderRadius: 24,
   },
   noteVoiceButton: {
     position: 'absolute',