Thin app runtime and generic node shells

docs/modernization/roadmap.md

@@ -82,13 +82,13 @@ Current hotspot files:
 - `src/canvas.cpp`: 17 lines
 - `src/app_layout.cpp`: 125 lines
 - `src/canvas_modes.cpp`: 1 line
-- `src/node.cpp`: 231 lines
+- `src/node.cpp`: 12 lines
 - `src/main.cpp`: 87 lines
 - `src/node_panel_brush.cpp`: 2 lines
 - `src/node_stroke_preview.cpp`: 160 lines
 - `src/node_canvas.cpp`: 85 lines
-- `src/app.cpp`: 125 lines
-- `src/app_dialogs.cpp`: 127 lines
+- `src/app.cpp`: 94 lines
+- `src/app_dialogs.cpp`: 95 lines
 
 Latest slice:
 
@@ -141,6 +141,18 @@ Latest slice:
 - The entire `CanvasModeGrid` implementation plus `ActionModeGrid` undo/redo
   glue now live in `src/legacy_canvas_mode_helpers.cpp` instead of
   `src/canvas_modes.cpp`, leaving `src/canvas_modes.cpp` as a minimal shell.
+- `App::request_close()`, the RenderDoc frame wrappers, and the render/UI
+  thread entrypoint wrappers now route through
+  `src/legacy_app_runtime_shell_services.*` instead of staying inline in
+  `src/app.cpp`, leaving `app.cpp` as a thinner retained app shell.
+- `App::show_progress()`, `App::message_box()`, and `App::input_box()` now
+  route through `src/legacy_app_dialog_services.*` instead of building dialog
+  plans and factories inline in `src/app_dialogs.cpp`.
+- The remaining generic `Node` event/capture/resize shell plus the
+  width/height/padding/margin/flex/visibility/geometry wrappers now live in
+  `src/legacy_ui_node_execution.cpp` and `src/legacy_ui_node_style.*` instead
+  of staying inline in `src/node.cpp`, leaving `node.cpp` as a near-trivial
+  attribute/load shell.
 
 Current architecture mismatches that must be treated as real blockers: