feat: add created_at field to CreatedApiKeyResponse and update related handlers

thoughts-frontend/app/settings/api-keys/page.tsx

@@ -9,9 +9,7 @@ export default async function ApiKeysPage() {
     redirect("/login");
   }
 
-  const initialApiKeys = await getApiKeys(token).catch(() => ({
-    keys: [],
-  }));
+  const initialApiKeys = await getApiKeys(token).catch(() => []);
 
   return (
     <div className="space-y-6">
@@ -21,7 +19,7 @@ export default async function ApiKeysPage() {
           Manage API keys for third-party applications.
         </p>
       </div>
-      <ApiKeyList initialApiKeys={initialApiKeys.keys} />
+      <ApiKeyList initialApiKeys={initialApiKeys} />
     </div>
   );
 }

thoughts-frontend/app/users/[username]/page.tsx

@@ -190,13 +190,13 @@ export default async function ProfilePage({ params }: ProfilePageProps) {
                 </div>
               </div>
 
-              <div id="profile-card__info" className="mt-4">
-                <h1 id="profile-card__name" className="text-2xl font-bold">
+              <div id="profile-card__info" className="mt-4 min-w-0">
+                <h1 id="profile-card__name" className="text-2xl font-bold break-words">
                   {user.displayName || user.username}
                 </h1>
                 <p
                   id="profile-card__username"
-                  className="text-sm text-muted-foreground"
+                  className="text-sm text-muted-foreground break-all"
                 >
                   @{user.username}
                 </p>