Route command conversion through app core

docs/modernization/build-inventory.md

@@ -844,6 +844,10 @@ Known local toolchain state:
   UI-state save, stroke-preview renderer shutdown, recording stop,
   texture/shader invalidation, layout unload, render-target/mesh destruction,
   panel-node release, and quick-mode cleanup.
+- `pp_app_core_command_convert_tests` covers command-line panorama conversion
+  sequencing for renderer-state setup, temporary canvas allocation, project
+  open, equirectangular export, malformed input rejection, malformed-plan
+  rejection, and exact executor dispatch order.
 - `pp_platform_api_tests` covers service dispatch for clipboard read/write,
   empty clipboard writes, cursor visibility, virtual-keyboard visibility,
   external file display, file sharing, VR lifecycle, layout/asset file load