refactor(assets): relocate character avatars

src/app/chat/components/__tests__/tailwind-components.test.tsx

@@ -30,7 +30,7 @@ describe("chat Tailwind components", () => {
     expect(aiHtml).toContain('aria-label="AI avatar"');
     expect(aiHtml).toContain("size-(--chat-avatar-size,43px)");
     expect(aiHtml).toContain("size-full object-cover");
-    expect(aiHtml).toContain("%2Fimages%2Fchat%2Fpic-chat-elio.png");
+    expect(aiHtml).toContain("%2Fimages%2Favatar%2Felio.png");
     expect(userHtml).toContain('aria-label="User avatar"');
     expect(userHtml).toContain("%2Fuser-avatar.png");
   });

src/app/chat/components/message-avatar.tsx

@@ -16,7 +16,7 @@ export function MessageAvatar({ isFromAI, userAvatarUrl }: MessageAvatarProps) {
     return (
       <div className={AVATAR_CLASS_NAME} aria-label="AI avatar">
         <Image
-          src="/images/chat/pic-chat-elio.png"
+          src="/images/avatar/elio.png"
           alt="Elio"
           width={43}
           height={43}