Add image import service boundary

docs/modernization/roadmap.md

@@ -519,9 +519,10 @@ now dispatches through `DocumentCanvasClearServices` before the legacy
 `Canvas::clear` adapter continues.
 `pano_cli plan-image-import` exposes app-core planning for File > Import image
 route decisions, including wide equirectangular images, legacy vertical cube
-strips, regular transform-placement images, and invalid image dimensions before
-legacy `Canvas::import_equirectangular` or import transform-mode execution
-continues.
+strips, regular transform-placement images, and invalid image dimensions; live
+File > Import execution now dispatches through `DocumentImageImportServices`
+before legacy image loading, `Canvas::import_equirectangular`, or import
+transform-mode setup continues.
 `pano_cli plan-file-menu` exposes app-core planning for the top-level File menu
 commands, including new/open/import, save/save-as/save-version, share, resize,
 cloud upload/browse, JPEG export, and export-submenu routing. Direct File menu
@@ -1244,7 +1245,8 @@ Results:
   canvas clear planning as JSON automation.
 - `pp_app_core_document_import_tests` passed, covering wide equirectangular,
   legacy vertical cube strip, regular transform-placement, and invalid-dimension
-  import route decisions.
+  import route decisions, equirectangular service dispatch, transform import
+  dispatch, empty-path rejection, and invalid execution dimension rejection.
 - `pano_cli_plan_image_import_wide_equirect_smoke`,
   `pano_cli_plan_image_import_transform_smoke`, and
   `pano_cli_plan_image_import_rejects_invalid_dimensions` passed and expose File