Revert "feat: extend image proxy to all images, not just douban"

This reverts commit d682cee427.

src/lib/utils.ts

@@ -399,11 +399,6 @@ export function processImageUrl(originalUrl: string): string {
     return originalUrl;
   }
 
-  // 如果不是 http/https 开头（相对路径、data URI 等），直接返回
-  if (!originalUrl.startsWith('http://') && !originalUrl.startsWith('https://')) {
-    return originalUrl;
-  }
-
   // 处理 TMDB 图片 URL 替换
   if (originalUrl.includes('image.tmdb.org')) {
     if (typeof window !== 'undefined') {
@@ -429,21 +424,12 @@ export function processImageUrl(originalUrl: string): string {
   }
 
   // 处理豆瓣图片代理
-  if (originalUrl.includes('doubanio.com')) {
+  if (!originalUrl.includes('doubanio.com')) {
+    return originalUrl;
+  }
+
   const { proxyType, proxyUrl } = getDoubanImageProxyConfig();
   return buildDoubanImageUrl(originalUrl, proxyType, proxyUrl);
-  }
-
-  // 其他图片（视频源封面图等）走本站代理，带缓存
-  // 可通过 localStorage 'proxyAllImages' = 'false' 关闭
-  if (typeof window !== 'undefined') {
-    const proxyAll = localStorage.getItem('proxyAllImages');
-    if (proxyAll !== 'false') {
-      return `/api/image-proxy?url=${encodeURIComponent(originalUrl)}`;
-    }
-  }
-
-  return originalUrl;
 }
 
 /**