fix: improve cache management and sticker deletion

Update cache directory scanning to use platform-specific paths for iOS and Android.
Add a delay after clearing cache to ensure native deletion completes.
Correct the request body structure for sticker deletion API calls.

src/screens/profile/DataStorageScreen.tsx

@@ -63,13 +63,19 @@ export const DataStorageScreen: React.FC = () => {
     if (Platform.OS === 'web') return 0;
     try {
       const cacheDir = Paths.cache;
-      const sdImageCacheDir = new Directory(cacheDir, 'defaultDiskCache');
-      const expoImageCacheDir = new Directory(cacheDir, 'expo-image');
+      // expo-image 在底层使用原生图片库，磁盘缓存目录名与平台相关：
+      // - iOS（SDWebImage）: {cache}/com.hackemist.SDImageCache/
+      // - Android（Glide）: {cache}/image_manager_disk_cache/
+      // 同时保留旧的猜测路径作为兜底，避免未来库升级改路径时彻底失效。
+      const candidateDirNames =
+        Platform.OS === 'ios'
+          ? ['com.hackemist.SDImageCache', 'defaultDiskCache', 'expo-image']
+          : ['image_manager_disk_cache', 'expo-image', 'defaultDiskCache'];
 
       const scanDirectorySize = async (dir: Directory): Promise<number> => {
         let size = 0;
         try {
-          if (!(await dir.exists)) return 0;
+          if (!dir.exists) return 0;
           const items = dir.list();
           for (const item of items) {
             try {
@@ -87,7 +93,10 @@ export const DataStorageScreen: React.FC = () => {
         return size;
       };
 
-      const totalSize = await scanDirectorySize(sdImageCacheDir) + await scanDirectorySize(expoImageCacheDir);
+      let totalSize = 0;
+      for (const name of candidateDirNames) {
+        totalSize += await scanDirectorySize(new Directory(cacheDir, name));
+      }
       return totalSize;
     } catch (error) {
       console.warn('读取 expo-image 缓存大小失败:', error);
@@ -144,6 +153,9 @@ export const DataStorageScreen: React.FC = () => {
               await mediaCacheManager.clearAll();
               await Image.clearDiskCache();
               await Image.clearMemoryCache();
+              // expo-image 的磁盘缓存清理由原生库（SDWebImage / Glide）在后台线程执行，
+              // 立即读取目录大小可能仍是清理前的值，这里短暂等待以确保文件落盘删除完成。
+              await new Promise((resolve) => setTimeout(resolve, 300));
               await loadStats();
               Alert.alert('完成', '缓存已清除');
             } catch (error) {

src/services/message/stickerService.ts

@@ -85,9 +85,8 @@ export const addStickerFromUrl = async (
  */
 export const deleteSticker = async (stickerId: string): Promise<boolean> => {
   try {
-    await api.delete('/stickers', {
-      data: { sticker_id: stickerId },
-    });
+    // api.delete(path, body) 的第二个参数直接作为请求体，不需要 axios 风格的 { data } 包装
+    await api.delete('/stickers', { sticker_id: stickerId });
     return true;
   } catch (error) {
     console.error('删除自定义表情失败:', error);
@@ -130,9 +129,7 @@ export const batchDeleteStickers = async (stickerIds: string[]): Promise<{ succe
   
   for (const stickerId of stickerIds) {
     try {
-      await api.delete('/stickers', {
-        data: { sticker_id: stickerId },
-      });
+      await api.delete('/stickers', { sticker_id: stickerId });
       success++;
     } catch (error) {
       console.error(`删除表情 ${stickerId} 失败:`, error);