Centralize legacy new document bridge

docs/modernization/roadmap.md

@@ -739,6 +739,11 @@ app-core document-session executors and `src/legacy_document_session_services.*`
 preserving close prompts, save dialogs, save-version routing, existing-project
 save execution, and dirty-workflow save-before-continue prompts while retained
 legacy UI/canvas behavior remains tracked under `DEBT-0040`.
+`App::dialog_newdoc` now routes accepted new-document plans through the
+app-core new-document executor and `src/legacy_document_session_services.*`,
+preserving target overwrite prompts, legacy canvas resize/layer setup, history
+clearing, title updates, dirty/new-document flag mutation, and keyboard/dialog
+cleanup while retained execution remains tracked under `DEBT-0041`.
 
 Implementation tasks:
 
@@ -1287,6 +1292,13 @@ Results:
   `pp_app_core_document_session_tests`, `pano_cli_simulate_app_session_*`, and
   `pano_cli_plan_document_file/version_*` smoke tests after the live bridge
   split.
+- `PanoPainter`, `pp_app_core_document_session_tests`, and `pano_cli` built
+  after accepted new-document execution moved behind the new-document services
+  bridge. A clean rebuild was required once because MSVC reported the known
+  Debug PDB `LNK1103` corruption, after which the build passed.
+- Focused new-document/session CTest coverage passed for
+  `pp_app_core_document_session_tests`, `pano_cli_plan_new_document_*`, and
+  `pano_cli_simulate_app_session_*` smoke tests after the live bridge split.
 - `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.