diff --git a/frontend/src/components/AuthImage.tsx b/frontend/src/components/AuthImage.tsx
new file mode 100644
index 0000000..e3e7142
--- /dev/null
+++ b/frontend/src/components/AuthImage.tsx
@@ -0,0 +1,24 @@
+import { useEffect, useState, ImgHTMLAttributes } from "react";
+import client from "../api/client";
+
+interface AuthImageProps extends ImgHTMLAttributes<HTMLImageElement> {
+  src: string;
+}
+
+export function AuthImage({ src, ...props }: AuthImageProps) {
+  const [objectUrl, setObjectUrl] = useState<string | null>(null);
+
+  useEffect(() => {
+    let url: string | null = null;
+    client.get(src, { responseType: "blob" }).then((res) => {
+      url = URL.createObjectURL(res.data);
+      setObjectUrl(url);
+    });
+    return () => {
+      if (url) URL.revokeObjectURL(url);
+    };
+  }, [src]);
+
+  if (!objectUrl) return null;
+  return <img src={objectUrl} {...props} />;
+}
diff --git a/frontend/src/pages/AnalysisView.tsx b/frontend/src/pages/AnalysisView.tsx
index b5fba3e..1052383 100644
--- a/frontend/src/pages/AnalysisView.tsx
+++ b/frontend/src/pages/AnalysisView.tsx
@@ -3,6 +3,7 @@ import { useParams, useNavigate } from "react-router-dom";
 import { useAnalysis, useDeleteAnalysis } from "../hooks/useAnalysis";
 import { useAnalysisStore, type AnalysisTab } from "../stores/analysisStore";
 import { getAnalysisImageUrl, checkAIInsightsAvailable, generateAIInsights } from "../api/analysis";
+import { AuthImage } from "../components/AuthImage";
 import type { Insight } from "../types/analysis";
 
 function getScoreInfo(score: number) {
@@ -76,7 +77,7 @@ function ZoomableImage({ src, alt }: { src: string; alt: string }) {
   const zoom = useAnalysisStore((s) => s.zoom);
   return (
     <div className="overflow-auto">
-      <img
+      <AuthImage
         src={src}
         alt={alt}
         className="object-contain"
diff --git a/frontend/src/pages/ComparisonView.tsx b/frontend/src/pages/ComparisonView.tsx
index e19de9e..43fbc8d 100644
--- a/frontend/src/pages/ComparisonView.tsx
+++ b/frontend/src/pages/ComparisonView.tsx
@@ -2,6 +2,7 @@ import { useEffect, useState } from "react";
 import { useParams, useNavigate } from "react-router-dom";
 import { useProject } from "../hooks/useProjects";
 import { getAnalysisImageUrl } from "../api/analysis";
+import { AuthImage } from "../components/AuthImage";
 import Card from "../components/common/Card";
 import Button from "../components/common/Button";
 import LoadingSpinner from "../components/common/LoadingSpinner";
@@ -98,7 +99,7 @@ export default function ComparisonView() {
                 <p className="text-xs text-gray-400">{analysis.model}</p>
               </div>
               <div className="aspect-video bg-gray-100">
-                <img
+                <AuthImage
                   src={getAnalysisImageUrl(analysis.id, "heatmap")}
                   alt={`Heatmap: ${analysis.name}`}
                   className="w-full h-full object-contain"
diff --git a/frontend/src/pages/ProjectDetail.tsx b/frontend/src/pages/ProjectDetail.tsx
index 4feaf67..3b1537b 100644
--- a/frontend/src/pages/ProjectDetail.tsx
+++ b/frontend/src/pages/ProjectDetail.tsx
@@ -3,6 +3,7 @@ import { useParams, Link, useNavigate } from "react-router-dom";
 import { useProject, useDeleteProject } from "../hooks/useProjects";
 import { useDeleteAnalysis } from "../hooks/useAnalysis";
 import { getAnalysisImageUrl } from "../api/analysis";
+import { AuthImage } from "../components/AuthImage";
 import Card from "../components/common/Card";
 import Button from "../components/common/Button";
 import LoadingSpinner from "../components/common/LoadingSpinner";
@@ -123,16 +124,13 @@ export default function ProjectDetail() {
                 className="hover:shadow-md transition-shadow cursor-pointer overflow-hidden"
               >
                 <div className="aspect-video bg-gray-100 relative">
-                  <img
+                  <AuthImage
                     src={
                       analysis.thumbnail_url ||
                       getAnalysisImageUrl(analysis.id, "heatmap")
                     }
                     alt={analysis.name}
                     className="w-full h-full object-cover"
-                    onError={(e) => {
-                      (e.target as HTMLImageElement).style.display = "none";
-                    }}
                   />
                   <span
                     className={`absolute top-2 right-2 text-xs px-2 py-0.5 rounded-full font-medium ${