feat(sidebar): reorder folder groups by drag and persist sort order

src/lib/api.ts

@@ -640,6 +640,10 @@ export async function removeFolderFromWorkspace(
   return getTransport().call("remove_folder_from_workspace", { folderId })
 }
 
+export async function reorderFolders(ids: number[]): Promise<void> {
+  return getTransport().call("reorder_folders", { ids })
+}
+
 export async function importLocalConversations(
   folderId: number
 ): Promise<ImportResult> {

src/lib/tauri.ts

@@ -508,6 +508,10 @@ export async function removeFolderFromWorkspace(
   return invoke("remove_folder_from_workspace", { folderId })
 }
 
+export async function reorderFolders(ids: number[]): Promise<void> {
+  return invoke("reorder_folders", { ids })
+}
+
 export async function importLocalConversations(
   folderId: number
 ): Promise<ImportResult> {

src/lib/types.ts

@@ -163,6 +163,7 @@ export interface FolderDetail {
   parent_branch: string | null
   default_agent_type: AgentType | null
   last_opened_at: string
+  sort_order: number
 }
 
 export interface OpenedTab {