diff --git a/app/components/shared/FilePreviewer.vue b/app/components/shared/FilePreviewer.vue
index e3eaf3a..9dbb177 100644
--- a/app/components/shared/FilePreviewer.vue
+++ b/app/components/shared/FilePreviewer.vue
@@ -122,6 +122,8 @@
   const errorText = computed(() => error.value?.message ?? null);
   const fileMeta = computed(() => props.file ?? data.value ?? null);
 
+  logger.debug('FilePreviewer - fileMeta:', fileMeta.value);
+
   /** 预览源地址：支持在 file.url 上追加额外 query（如临时 token、inline） */
   const src = computed<string>(() => {
     if (!fileMeta.value) return '';
diff --git a/app/composables/directus/useDirectusFiles.ts b/app/composables/directus/useDirectusFiles.ts
index 38af82b..69ee3e7 100644
--- a/app/composables/directus/useDirectusFiles.ts
+++ b/app/composables/directus/useDirectusFiles.ts
@@ -1,19 +1,14 @@
 export const useDirectusFiles = () => {
-  const config = useRuntimeConfig();
-  const baseUrl = config.public.directus.url;
-
   const getFileUrl = (
     id?: string | null,
     options?: Record<string, string | number | boolean>
   ): string => {
     if (!id) return '';
-    const query = options
-      ? '?' +
-        new URLSearchParams(
-          Object.entries(options).map(([key, value]) => [key, String(value)])
-        ).toString()
-      : '';
-    return `${baseUrl}/assets/${id}${query}`;
+
+    const params = new URLSearchParams(
+      options as Record<string, string>
+    ).toString();
+    return `/api/assets/${id}${params ? `?${params}` : ''}`;
   };
 
   return {
diff --git a/app/composables/directus/useDirectusImage.ts b/app/composables/directus/useDirectusImage.ts
index 08215d6..14b4143 100644
--- a/app/composables/directus/useDirectusImage.ts
+++ b/app/composables/directus/useDirectusImage.ts
@@ -1,8 +1,4 @@
 export const useDirectusImage = () => {
-  const config = useRuntimeConfig();
-  const baseUrl = config.public.directus.url;
-  const token = config.public.directus.token;
-
   type DirectusAssetParams = {
     width?: number;
     height?: number;
@@ -13,19 +9,11 @@ export const useDirectusImage = () => {
 
   const getImageUrl = (id?: string | null, options?: DirectusAssetParams) => {
     if (!id) return '';
-    const queryToken = token ? 'access_token=' + token : '';
-    const queryOptions = options
-      ? new URLSearchParams(
-          Object.fromEntries(
-            Object.entries(options).map(([key, value]) => [key, String(value)])
-          )
-        ).toString
-      : '';
-    const query =
-      queryToken || queryOptions
-        ? `?${[queryToken, queryOptions].filter(Boolean).join('&')}`
-        : '';
-    return `${baseUrl}/assets/${id}${query}`;
+
+    const params = new URLSearchParams(
+      options as Record<string, string>
+    ).toString();
+    return `/api/assets/${id}${params ? `?${params}` : ''}`;
   };
 
   return { getImageUrl };
diff --git a/server/api/assets/[id].ts b/server/api/assets/[id].ts
new file mode 100644
index 0000000..8975391
--- /dev/null
+++ b/server/api/assets/[id].ts
@@ -0,0 +1,36 @@
+export default defineEventHandler(async (event) => {
+  const id = getRouterParam(event, 'id');
+  if (!id)
+    throw createError({
+      statusCode: 400,
+      statusMessage: 'ID parameter is required',
+    });
+
+  const url = new URL(`${useRuntimeConfig().public.directus.url}/assets/${id}`);
+
+  const query = getQuery(event);
+  Object.entries(query).forEach(([key, value]) => {
+    url.searchParams.set(key, String(value));
+  });
+
+  const token = useRuntimeConfig().public.directus.token || '';
+  const res = await fetch(url.toString(), {
+    headers: {
+      Authorization: `Bearer ${token}`,
+    },
+  });
+
+  if (!res.ok) {
+    throw createError({
+      statusCode: res.status,
+      statusMessage: `Failed to fetch asset: ${res.statusText}`,
+    });
+  }
+
+  const contentType =
+    res.headers.get('Content-Type') || 'application/octet-stream';
+  setHeader(event, 'Content-Type', contentType);
+  setHeader(event, 'Cache-Control', 'public, max-age=86400, immutable');
+
+  return res.body;
+});
diff --git a/server/utils/file.ts b/server/utils/file.ts
index 117d151..14dc5ac 100644
--- a/server/utils/file.ts
+++ b/server/utils/file.ts
@@ -41,7 +41,7 @@ export async function getFileMeta(id: string): Promise<FileMeta | null> {
       width: file.width ?? undefined,
       height: file.height ?? undefined,
       uploaded_on: file.uploaded_on ?? undefined,
-      url: `${baseUrl}/assets/${file.id}`,
+      url: `/api/assets/${file.id}`,
       previewable: isPreviewable(file.type),
     };
   } catch (error) {