feat(settings): overhaul Settings modal with improvements and General section

- Remove Workers section (read-only status, belongs in background tasks panel)
- Remove Captioning coming-soon placeholder
- Add General section with Open data folder button (tauri-plugin-opener)
- Persist queue scope and folder selection across sessions via settings files
- Show inline validation errors on threshold/batch size inputs instead of silent revert
- Fix acceleration save errors appearing in wrong card
- Disable folder selection controls when target scope is All media

src-tauri/src/lib.rs

@@ -139,6 +139,11 @@ pub fn run() {
             commands::delete_images_from_disk,
             commands::rename_folder,
             commands::update_folder_path,
+            commands::get_tagging_queue_scope,
+            commands::set_tagging_queue_scope,
+            commands::get_tagging_queue_folder_ids,
+            commands::set_tagging_queue_folder_ids,
+            commands::open_app_data_folder,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");