fix(ui): handle null chat in folder drop handler for cross-account drag (#25928)

src/lib/components/layout/Sidebar/RecursiveFolder.svelte

@@ -176,24 +176,26 @@
 									});
 								}
 
-								// Move the chat
+								if (chat) {
-								const res = await updateChatFolderIdById(
+									// Move the chat
-									localStorage.token,
+									const res = await updateChatFolderIdById(
-									chat.id,
+										localStorage.token,
-									folderId
+										chat.id,
-								).catch((error) => {
+										folderId
-									toast.error(`${error}`);
+									).catch((error) => {
-									return null;
+										toast.error(`${error}`);
-								});
+										return null;
+									});
 
-								onItemMove({
+									onItemMove({
-									originFolderId: chat.folder_id,
+										originFolderId: chat.folder_id,
-									targetFolderId: folderId,
+										targetFolderId: folderId,
-									e
+										e
-								});
+									});
 
-								if (res) {
+									if (res) {
-									dispatch('update');
+										dispatch('update');
+									}
 								}
 							}
 						} catch (error) {