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

src-tauri/src/db/migration/mod.rs

@@ -10,6 +10,7 @@ mod m20260401_000001_chat_channel_sender_context;
 mod m20260404_000001_model_provider;
 mod m20260406_000001_agent_setting_model_provider;
 mod m20260420_000001_opened_tabs;
+mod m20260422_000001_folder_sort_order;
 pub struct Migrator;
 
 #[async_trait::async_trait]
@@ -26,6 +27,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260404_000001_model_provider::Migration),
             Box::new(m20260406_000001_agent_setting_model_provider::Migration),
             Box::new(m20260420_000001_opened_tabs::Migration),
+            Box::new(m20260422_000001_folder_sort_order::Migration),
         ]
     }
 }