fix(ui): harden avatar fallback regressions

ui/src/ui/views/agents-utils.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, it } from "vitest";
 import {
   agentLogoUrl,
   resolveConfiguredCronModelSuggestions,
+  resolveAgentAvatarUrl,
   resolveEffectiveModelFallbacks,
   sortLocaleStrings,
 } from "./agents-utils.ts";
@@ -110,3 +111,18 @@ describe("agentLogoUrl", () => {
     expect(agentLogoUrl("")).toBe("favicon.svg");
   });
 });
+
+describe("resolveAgentAvatarUrl", () => {
+  it("prefers a runtime avatar URL over non-URL identity avatars", () => {
+    expect(
+      resolveAgentAvatarUrl({ identity: { avatar: "A", avatarUrl: "/avatar/main" } }, {
+        avatar: "A",
+      } as { avatar: string }),
+    ).toBe("/avatar/main");
+  });
+
+  it("returns null for initials or emoji avatar values without a URL", () => {
+    expect(resolveAgentAvatarUrl({ identity: { avatar: "A" } })).toBeNull();
+    expect(resolveAgentAvatarUrl({ identity: { avatar: "🦞" } })).toBeNull();
+  });
+});

ui/src/ui/views/agents-utils.ts

@@ -200,15 +200,18 @@ export function resolveAgentAvatarUrl(
   agent: { identity?: { avatar?: string; avatarUrl?: string } },
   agentIdentity?: AgentIdentityResult | null,
 ): string | null {
-  const url =
-    agentIdentity?.avatar?.trim() ??
-    agent.identity?.avatarUrl?.trim() ??
-    agent.identity?.avatar?.trim();
-  if (!url) {
-    return null;
+  const candidates = [
+    agentIdentity?.avatar?.trim(),
+    agent.identity?.avatarUrl?.trim(),
+    agent.identity?.avatar?.trim(),
+  ];
+  for (const candidate of candidates) {
+    if (!candidate) {
+      continue;
+    }
+    if (AVATAR_URL_RE.test(candidate)) {
+      return candidate;
     }
-  if (AVATAR_URL_RE.test(url)) {
-    return url;
   }
   return null;
 }

ui/src/ui/views/chat.test.ts

@@ -96,6 +96,55 @@ describe("chat view", () => {
     expect(logoImage?.getAttribute("src")).toBe("favicon.svg");
   });
 
+  it("keeps the welcome logo fallback under the mounted base path", () => {
+    const container = document.createElement("div");
+    render(
+      renderChat(
+        createProps({
+          assistantName: "Assistant",
+          assistantAvatar: "A",
+          assistantAvatarUrl: null,
+          basePath: "/openclaw/",
+        }),
+      ),
+      container,
+    );
+
+    const logoImage = container.querySelector<HTMLImageElement>(
+      ".agent-chat__welcome .agent-chat__avatar--logo img",
+    );
+    expect(logoImage).not.toBeNull();
+    expect(logoImage?.getAttribute("src")).toBe("/openclaw/favicon.svg");
+  });
+
+  it("keeps grouped assistant avatar fallbacks under the mounted base path", () => {
+    const container = document.createElement("div");
+    render(
+      renderChat(
+        createProps({
+          assistantName: "Assistant",
+          assistantAvatar: "A",
+          assistantAvatarUrl: null,
+          basePath: "/openclaw/",
+          messages: [
+            {
+              role: "assistant",
+              content: "hello",
+              timestamp: 1000,
+            },
+          ],
+        }),
+      ),
+      container,
+    );
+
+    const groupedLogo = container.querySelector<HTMLImageElement>(
+      ".chat-group.assistant .chat-avatar--logo",
+    );
+    expect(groupedLogo).not.toBeNull();
+    expect(groupedLogo?.getAttribute("src")).toBe("/openclaw/favicon.svg");
+  });
+
   it("renders compacting indicator as a badge", () => {
     const container = document.createElement("div");
     render(

vitest.config.ts

@@ -82,6 +82,7 @@ export default defineConfig({
       "src/**/*.test.ts",
       "extensions/**/*.test.ts",
       "test/**/*.test.ts",
+      "ui/src/ui/app-chat.test.ts",
       "ui/src/ui/views/agents-utils.test.ts",
       "ui/src/ui/views/chat.test.ts",
       "ui/src/ui/views/usage-render-details.test.ts",