fix(artifact): enhance artifact content loading to include URL for non-write files (#1678)

frontend/src/core/artifacts/hooks.ts

@@ -34,5 +34,10 @@ export function useArtifactContent({
     // Cache artifact content for 5 minutes to avoid repeated fetches (especially for .skill ZIP extraction)
     staleTime: 5 * 60 * 1000,
   });
-  return { content: isWriteFile ? content : data, isLoading, error };
+  return {
+    content: isWriteFile ? content : data?.content,
+    url: isWriteFile ? undefined : data?.url,
+    isLoading,
+    error,
+  };
 }

frontend/src/core/artifacts/loader.ts

@@ -20,7 +20,7 @@ export async function loadArtifactContent({
   const url = urlOfArtifact({ filepath: enhancedFilepath, threadId, isMock });
   const response = await fetch(url);
   const text = await response.text();
-  return text;
+  return { content: text, url };
 }
 
 export function loadArtifactContentFromToolCall({