fix: fix artifacts in demo mode

frontend/src/app/workspace/chats/[thread_id]/page.tsx

@@ -119,8 +119,8 @@ export default function ChatPage() {
       <ResizablePanelGroup orientation="horizontal">
         <ResizablePanel
           className="relative"
-          defaultSize={artifactsOpen ? 46 : 100}
-          minSize={artifactsOpen ? 30 : 100}
+          defaultSize={artifactsOpen && artifacts?.length > 0 ? 46 : 100}
+          minSize={artifactsOpen && artifacts?.length > 0 ? 30 : 100}
         >
           <div className="relative flex size-full min-h-0 justify-between">
             <header
@@ -215,7 +215,9 @@ export default function ChatPage() {
         <ResizableHandle
           className={cn(
             "opacity-33 hover:opacity-100",
-            !artifactsOpen && "pointer-events-none opacity-0",
+            !artifactsOpen &&
+              artifacts?.length > 0 &&
+              "pointer-events-none opacity-0",
           )}
         />
         <ResizablePanel
@@ -223,14 +225,16 @@ export default function ChatPage() {
             "transition-all duration-300 ease-in-out",
             !artifactsOpen && "opacity-0",
           )}
-          defaultSize={artifactsOpen ? 64 : 0}
+          defaultSize={artifactsOpen && artifacts?.length > 0 ? 64 : 0}
           minSize={0}
-          maxSize={artifactsOpen ? undefined : 0}
+          maxSize={artifactsOpen && artifacts?.length > 0 ? undefined : 0}
         >
           <div
             className={cn(
               "h-full p-4 transition-transform duration-300 ease-in-out",
-              artifactsOpen ? "translate-x-0" : "translate-x-full",
+              artifactsOpen && artifacts?.length > 0
+                ? "translate-x-0"
+                : "translate-x-full",
             )}
           >
             {selectedArtifact ? (

frontend/src/core/threads/hooks.ts

@@ -90,7 +90,10 @@ export function useSubmitThread({
                   type: fileUIPart.mediaType || blob.type,
                 });
               } catch (error) {
-                console.error(`Failed to fetch file ${fileUIPart.filename}:`, error);
+                console.error(
+                  `Failed to fetch file ${fileUIPart.filename}:`,
+                  error,
+                );
                 return null;
               }
             }
@@ -130,7 +133,7 @@ export function useSubmitThread({
           streamSubgraphs: true,
           streamResumable: true,
           config: {
-            recursion_limit: 100,
+            recursion_limit: 1000,
           },
           context: {
             ...threadContext,