fix: upload page

apps/landing/src/app/demo/upload/page.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useState, useEffect, useRef, DragEvent, ChangeEvent } from 'react';
+import { useState, useEffect, useRef, useCallback, DragEvent, ChangeEvent } from 'react';
 import { useApiKey } from '@/components/shared/ApiKeyWidget/apikey-context';
 import { Section } from '@/components/shared/Section';
 import { CodeExamplesWidget } from '@/components/demo/CodeExamplesWidget';
@@ -235,13 +235,17 @@ export default function DemoUploadPage() {
     }
   };
 
-  const handleDownloadMeasured = (itemId: string, downloadMs: number) => {
+  const handleDownloadMeasured = useCallback((itemId: string, downloadMs: number) => {
     setUploadHistory((prev) =>
-      prev.map((item) =>
-        item.id === itemId ? { ...item, downloadMs } : item
-      )
+      prev.map((item) => {
+        // Only update if this item doesn't have downloadMs yet (prevent re-measuring)
+        if (item.id === itemId && item.downloadMs === undefined) {
+          return { ...item, downloadMs };
+        }
+        return item;
+      })
     );
-  };
+  }, []);
 
   const generateUploadCodeExamples = (item: UploadHistoryItem, key: string, baseUrl: string) => {
     const fileName = item.originalName;

apps/landing/src/components/shared/ImageCard/index.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useEffect } from 'react';
+import { useEffect, useRef } from 'react';
 import { ImageMetadataBar } from '../ImageMetadataBar';
 import { useImageDownloadTime } from './useImageDownloadTime';
 import { usePageContext } from '@/contexts/page-context';
@@ -36,9 +36,13 @@ export const ImageCard = ({
     measureDownloadTime ? imageUrl : null
   );
 
+  // Track if we've already called onDownloadMeasured to prevent duplicate calls
+  const hasCalledCallback = useRef(false);
+
   useEffect(() => {
-    if (downloadTime !== null && onDownloadMeasured) {
+    if (downloadTime !== null && onDownloadMeasured && !hasCalledCallback.current) {
       onDownloadMeasured(downloadTime);
+      hasCalledCallback.current = true;
     }
   }, [downloadTime, onDownloadMeasured]);