Plan document share decisions in app core

docs/modernization/roadmap.md

@@ -448,6 +448,9 @@ canvas/recording export execution.
 clear, platform recorded-file cleanup, frame reset, and export progress-total
 decisions used by the live recording controls before legacy recording threads,
 PBO readback, and MP4 encoder execution continue.
+`pano_cli plan-share-file` exposes the app-core saved-path decision used by the
+live platform share command before iOS/macOS sharing bridges or retained no-op
+platform branches execute.
 `pano_cli plan-cloud-upload` exposes the app-core cloud upload decision used by
 the live cloud upload command for missing-canvas, new-document warning, publish
 prompt, and dirty-document save-before-upload states before legacy UI, canvas,
@@ -929,6 +932,11 @@ Results:
   `pano_cli_plan_recording_session_running_smoke`, and
   `pano_cli_plan_recording_session_platform_cleanup_smoke` passed and expose
   app-core recording lifecycle/export decisions as JSON.
+- `pp_app_core_document_sharing_tests` passed, covering saved-path gating before
+  platform share execution.
+- `pano_cli_plan_share_file_unsaved_smoke` and
+  `pano_cli_plan_share_file_saved_smoke` passed and expose app-core share
+  decisions as JSON.
 - `panopainter_validate_shaders` passed, validating 25 shader programs and 7
   shader includes for stage markers and include graph integrity.
 - `pp_renderer_gl_capabilities_tests` passed on default MSVC, vcpkg-headless,