Thin app dialog export and popup seams

docs/modernization/tasks.md

@@ -65,6 +65,12 @@ Key facts:
 - `App::dialog_browse()` no longer owns browse-dialog button wiring inline; the
   retained document-open bridge now owns that handoff in
   `src/legacy_document_open_services.*`.
+- `App::dialog_open()`, `App::dialog_browse()`, and `App::dialog_resize()` now
+  delegate retained dialog construction and overlay/button wiring through
+  `src/legacy_document_open_services.*` and
+  `src/legacy_document_session_services.*`, so
+  `src/app_dialogs_workflow.cpp` is thinner while the save-before-workflow
+  policy seam remains local.
 - `App::init_toolbar_main()` now delegates retained main-toolbar button wiring
   through `src/legacy_main_toolbar_binding_services.*`, so
   `src/app_layout_main_toolbar.cpp` is down to a thin root lookup and adapter
@@ -104,13 +110,13 @@ Key facts:
 - `App::dialog_usermanual()`, `App::dialog_changelog()`, and
   `App::dialog_about()` now delegate the retained info-dialog construction and
   overlay close wiring through `src/legacy_info_dialog_services.*` with
-  explicit `App&` plus overlay-anchor dependencies, so
-  `src/app_dialogs_info_openers.cpp` is thinner while `open_whatsnew_dialog()`
-  still owns the retained whats-new flow inline.
+  explicit `App&` plus overlay-anchor dependencies, and the remaining
+  What's New plus shortcuts flows now route through the same seam, so
+  `src/app_dialogs_info_openers.cpp` is down to thin forwarding only.
 - `App::dialog_newdoc()` and `App::dialog_save()` now delegate retained dialog
-  construction and button wiring through `src/legacy_document_session_services.*`,
-  so `src/app_dialogs_workflow.cpp` is thinner at the document-session seam
-  while browse, open, and resize retained workflows still remain there.
+  construction and button wiring through
+  `src/legacy_document_session_services.*`, so
+  `src/app_dialogs_workflow.cpp` is thinner at the document-session seam.
 - `App::title_update()` now delegates retained document-title and DPI-label
   rendering through `src/legacy_app_status_services.*`, so
   `src/app_layout.cpp` no longer owns that app-status family inline.
@@ -122,8 +128,16 @@ Key facts:
 - `App::init_sidebar()` now delegates the retained stroke-popup open/anchor/tick
   wiring through `src/legacy_sidebar_stroke_popup_services.*` with explicit
   `App&`, popup-root, trigger-button, and panel dependencies, so
-  `src/app_layout_sidebar.cpp` is thinner while the retained grid and layer
-  popup families still remain inline.
+  `src/app_layout_sidebar.cpp` is thinner while the retained layer popup family
+  still remains inline.
+- `App::init_sidebar()` now delegates the retained grid-popup
+  open/anchor/tick/close wiring through
+  `src/legacy_sidebar_grid_popup_services.*`, so the `btn-grids-panel` path in
+  `src/app_layout_sidebar.cpp` is down to a thin adapter.
+- `src/app_dialogs_export.cpp` is now a forwarding adapter; the retained
+  document export start/branching flows live in
+  `src/legacy_document_export_services.*`, and the PPBR dialog opener now lives
+  in `src/legacy_brush_package_export_services.*`.
 
 ## Parallel Assignment Rules