diff --git a/components/canvas/CanvasChatPanel.tsx b/components/canvas/CanvasChatPanel.tsx
index 71d3d8b5e..a475ab9bb 100644
--- a/components/canvas/CanvasChatPanel.tsx
+++ b/components/canvas/CanvasChatPanel.tsx
@@ -1437,6 +1437,34 @@ function buildPreviewImageUrl(url: string, width: number): string {
   });
 }
 
+function ModelAvatarImage({
+  src,
+  alt,
+  className,
+  fallback,
+}: {
+  src: string;
+  alt: string;
+  className: string;
+  fallback: JSX.Element;
+}) {
+  const [loadFailed, setLoadFailed] = useState(false);
+  if (!src || loadFailed) {
+    return fallback;
+  }
+
+  return (
+    <img
+      src={src}
+      alt={alt}
+      className={className}
+      loading="lazy"
+      decoding="async"
+      onError={() => setLoadFailed(true)}
+    />
+  );
+}
+
 const CANVAS_IMAGE_ANALYSIS_TITLE = "图片分析";
 const CANVAS_IMAGE_DONE_SUMMARY = "已完成本次生成，如需微调可继续告诉我。";
 const CANVAS_AGENT_SECTION_TITLES = new Set([
@@ -15115,17 +15143,22 @@ export function CanvasChatPanel({
                   )}
                 >
                   {model.avatarUrl ? (
-                    <img
+                    <ModelAvatarImage
                       src={buildPreviewImageUrl(model.avatarUrl, 40)}
                       alt={model.displayName}
                       className="block h-full w-full object-contain"
-                      loading="lazy"
-                      decoding="async"
-                      onError={(event) => {
-                        if (event.currentTarget.src !== model.avatarUrl) {
-                          event.currentTarget.src = model.avatarUrl || "";
-                        }
-                      }}
+                      fallback={
+                        <span
+                          className={cn(
+                            "flex h-full w-full items-center justify-center text-[10px] font-medium leading-none",
+                            isVideoWorkspace
+                              ? "text-muted-foreground"
+                              : "text-[#6b7280]"
+                          )}
+                        >
+                          {model.id === "auto" ? "A" : model.displayName.slice(0, 1)}
+                        </span>
+                      }
                     />
                   ) : (
                     <span
@@ -18648,17 +18681,20 @@ export function CanvasChatPanel({
                       )}
                     >
                       {selectDisplayModel?.avatarUrl ? (
-                        <img
+                        <ModelAvatarImage
                           src={buildPreviewImageUrl(selectDisplayModel.avatarUrl, 64)}
                           alt={selectDisplayModel.displayName || "模型头像"}
                           className="block h-full w-full object-contain"
-                          loading="lazy"
-                          decoding="async"
-                          onError={(event) => {
-                            if (event.currentTarget.src !== selectDisplayModel.avatarUrl) {
-                              event.currentTarget.src = selectDisplayModel.avatarUrl || "";
-                            }
-                          }}
+                          fallback={
+                            <span
+                              className={cn(
+                                "flex h-full w-full items-center justify-center text-[10px] font-medium leading-none",
+                                isVideoToolbarDark ? "text-zinc-100" : "text-[#4b5563] dark:text-zinc-900"
+                              )}
+                            >
+                              {(selectDisplayModel?.displayName || "A").slice(0, 1)}
+                            </span>
+                          }
                         />
                       ) : getToolbarItem("chatModelSelector").iconUrl ? (
                         <CanvasToolbarIcon
diff --git a/components/multimodal-input.tsx b/components/multimodal-input.tsx
index 251e7d0df..0f67aa19f 100644
--- a/components/multimodal-input.tsx
+++ b/components/multimodal-input.tsx
@@ -151,6 +151,36 @@ function isNanoBananaProModel(model: { displayName?: string | null; modelId?: st
     modelId.includes("nano-banana")
   );
 }
+
+function ModelAvatarImage({
+  src,
+  alt,
+  className,
+  fallback,
+}: {
+  src: string;
+  alt: string;
+  className: string;
+  fallback: JSX.Element;
+}) {
+  const [loadFailed, setLoadFailed] = useState<boolean>(false);
+
+  if (!src || loadFailed) {
+    return fallback;
+  }
+
+  return (
+    <img
+      src={src}
+      alt={alt}
+      className={className}
+      loading="lazy"
+      decoding="async"
+      onError={() => setLoadFailed(true)}
+    />
+  );
+}
+
 import { Trigger } from "@radix-ui/react-select";
 import type { UIMessage } from "ai";
 import equal from "fast-deep-equal";
@@ -2132,10 +2162,11 @@ function PureModelSelectorCompact({
           title={readOnlyName}
         >
           {readOnlyAvatarUrl ? (
-            <img
+            <ModelAvatarImage
               src={readOnlyAvatarUrl}
               alt={readOnlyName}
               className="h-7 w-7 rounded-full object-cover"
+              fallback={<Bot className="h-4 w-4 text-[#8a919f]" />}
             />
           ) : (
             <Bot className="h-4 w-4" />
@@ -2189,10 +2220,11 @@ function PureModelSelectorCompact({
             variant="ghost"
           >
             {selectedModel?.avatarUrl ? (
-              <img
+              <ModelAvatarImage
                 src={selectedModel.avatarUrl}
                 alt={selectedModel.name}
                 className="h-7 w-7 rounded-full object-cover"
+                fallback={<Bot className="h-4 w-4 text-[#8a919f]" />}
               />
             ) : (
               <Bot className="h-4 w-4" />
@@ -2227,10 +2259,26 @@ function PureModelSelectorCompact({
                   <span className="flex min-w-0 flex-1 items-center gap-3 overflow-visible">
                   <span className="flex h-6 w-6 shrink-0 items-center justify-center text-[#2f3640]">
                     {model.avatarUrl ? (
-                      <img
+                      <ModelAvatarImage
                         src={model.avatarUrl}
                         alt={model.displayName}
                         className="h-6 w-6 rounded-full object-cover"
+                        fallback={
+                          <span className="flex h-6 w-6 items-center justify-center text-[#2f3640]">
+                            {(() => {
+                              if (isVideoProviderType(model)) {
+                                return <Video className="h-[19px] w-[19px]" strokeWidth={2.2} />;
+                              }
+                              if (isImageGenerationModel(model)) {
+                                return <ImageIcon className="h-[19px] w-[19px]" strokeWidth={2.2} />;
+                              }
+                              if ((model.providerType || "") === "system") {
+                                return <Sparkles className="h-[19px] w-[19px]" strokeWidth={2.2} />;
+                              }
+                              return <Bot className="h-[19px] w-[19px]" strokeWidth={2.2} />;
+                            })()}
+                          </span>
+                        }
                       />
                     ) : (
                       <span className="flex h-6 w-6 items-center justify-center">
diff --git a/proxy.ts b/proxy.ts
index ab17ebb98..777dcba96 100644
--- a/proxy.ts
+++ b/proxy.ts
@@ -778,6 +778,11 @@ export async function proxy(request: NextRequest, event: NextFetchEvent) {
     return NextResponse.next();
   }
 
+  // 图片代理用于站内图片优化/转码，需支持未登录用户下的公开图片链接渲染。
+  if (pathname === "/api/image-proxy" && request.method === "GET") {
+    return NextResponse.next();
+  }
+
   // 允许匿名访问新版首页灵感数据
   if (pathname === "/api/featured" || pathname.startsWith("/api/featured/")) {
     return NextResponse.next();