Centralize legacy brush package import

docs/modernization/roadmap.md

@@ -746,7 +746,11 @@ behind the renderer boundary.
 `src/legacy_document_open_services.*`, preserving ABR/PPBR import prompts,
 unsaved-project discard prompts, project open, layer refresh, title updates,
 and history clearing while those live effects remain tracked under
-`DEBT-0039`.
+`DEBT-0039`. Accepted ABR/PPBR import prompts now delegate import execution to
+the app-core brush package import executor and
+`src/legacy_brush_package_import_services.*`, preserving detached legacy preset
+panel import threads while retained brush asset execution remains tracked under
+`DEBT-0048`.
 `App::request_close`, `App::save_document`, and
 `App::continue_document_workflow_after_optional_save` now route through
 app-core document-session executors and `src/legacy_document_session_services.*`,
@@ -1383,6 +1387,15 @@ Results:
   `pano_cli_plan_brush_package_export_smoke`,
   `pano_cli_plan_brush_package_export_rejects_empty_path`, and
   `pano_cli_plan_brush_package_export_dest_without_data_smoke`.
+- `PanoPainter`, `pp_app_core_brush_package_import_tests`, and `pano_cli` built
+  after ABR/PPBR brush package import execution moved behind app-core brush
+  import services.
+- Focused brush import CTest coverage passed for
+  `pp_app_core_brush_package_import_tests`,
+  `pano_cli_plan_brush_package_import_ppbr_smoke`,
+  `pano_cli_plan_brush_package_import_abr_smoke`,
+  `pano_cli_plan_brush_package_import_rejects_empty_path`, and
+  `pano_cli_plan_brush_package_import_rejects_unknown_kind`.
 - `pp_app_core_document_recording_tests` passed, covering recording start/stop,
   clear, platform recorded-file cleanup, frame-count reset, export progress
   totals, and oversized progress-total clamping.