update

app/utils/helper.ts

@@ -24,3 +24,29 @@ export function formatDate(dateString: string): string {
   const day = String(date.getDate()).padStart(2, "0");
   return `${year}-${month}-${day}`;
 }
+
+/**
+ * Gets a random 404 image from the /public/404/ directory
+ * @returns A random image path from /public/404/
+ */
+export function getRandomFallbackImage(): string {
+  const fallbackImages: string[] = [
+    "/404/1.webp",
+    "/404/2.webp",
+    "/404/3.webp",
+    "/404/4.webp",
+    "/404/5.webp",
+    "/404/6.webp",
+    "/404/7.webp",
+    "/404/8.webp",
+    "/404/9.webp",
+  ];
+
+  if (import.meta.server) {
+    // 在服务器端返回第一张图片以保证 SSR 一致性
+    return fallbackImages[0]!;
+  }
+
+  const randomIndex = Math.floor(Math.random() * fallbackImages.length);
+  return fallbackImages[randomIndex]!;
+}