Extract app menu binding services

docs/modernization/debt.md

@@ -25,6 +25,29 @@ agent or engineer to remove them without reconstructing context from chat.
   owns that document-open handoff inline while retained dialog creation,
   unsaved-project prompting, project-open execution, and title/layer refresh
   still remain.
+- 2026-06-17: `DEBT-0035` was narrowed again.
+  `src/app_layout_main_toolbar.cpp` no longer owns the retained main-toolbar
+  button wiring inline; `src/legacy_main_toolbar_binding_services.*` now owns
+  the per-button bindings behind explicit `App&` plus toolbar-root
+  dependencies, while the app-layout file remains a thin layout-root adapter
+  and retained toolbar execution still lives in
+  `src/legacy_app_shell_services.*`.
+- 2026-06-17: `DEBT-0031`/`DEBT-0030` were narrowed again.
+  `src/app_layout_file_menu.cpp` no longer owns the retained File-menu popup,
+  export-submenu popup, or button wiring inline; that binding now lives in
+  `src/legacy_file_menu_binding_services.*`, while retained file/export command
+  execution still lives in `src/legacy_app_shell_services.*`.
+- 2026-06-17: `DEBT-0034` was narrowed again.
+  `src/app_layout_about_layer_menu.cpp` no longer owns the retained About-menu
+  popup creation, version-label setup, or button wiring inline; that binding
+  now lives in `src/legacy_about_menu_binding_services.*`, while retained About
+  command execution and diagnostics still live in
+  `src/legacy_app_shell_services.*`.
+- 2026-06-17: `DEBT-0033` was narrowed again.
+  `src/app_layout_tools_menu.cpp` no longer owns the retained Tools > Panels
+  submenu popup flow or panel-item wiring inline; that binding now lives in
+  `src/legacy_tools_menu_binding_services.*`, while retained Tools command
+  execution and options-menu preference wiring still remain in the app shell.
 - 2026-06-17: `DEBT-0038` was narrowed again. The retained cloud upload and
   download background execution in `src/legacy_cloud_services.cpp` now routes
   through `AppRuntime::canvas_async_task` instead of a file-static worker