Extract node lifecycle, preview runtime, and Win32 input state

docs/modernization/tasks.md

@@ -335,6 +335,13 @@ Current slice:
   `src/legacy_node_stroke_preview_draw_services.*` instead of staying inline in
   `src/node_stroke_preview.cpp`, which trims another coherent preview
   draw-pass pocket while preserving the current runtime-facing shell.
+- The immediate preview runtime/orchestration block in
+  `NodeStrokePreview::draw_stroke_immediate()` for stroke setup, prepared
+  stroke construction, pass planning, shader setup, and live render request
+  assembly now also lives in
+  `src/legacy_node_stroke_preview_runtime_services.*` instead of staying
+  inline in `src/node_stroke_preview.cpp`, which trims another coherent
+  preview runtime pocket while preserving the current live draw path.
 - `NodeCanvas::init()` plus the remaining `NodeCanvas::draw()` outer shell now
   also live in `src/legacy_node_canvas_draw_services.*` instead of staying
   inline in `src/node_canvas.cpp`, which materially reduces the live node to a
@@ -644,6 +651,9 @@ Current slice:
   in `src/platform_windows/windows_window_shell.*` instead of `src/main.cpp`,
   which materially thins the entry file even though broader runtime/entrypoint
   composition is still open
+- retained input-state zeroing and reverse key-map initialization now also live
+  in `src/platform_windows/windows_window_shell.*` instead of `src/main.cpp`,
+  which trims another small but real retained-state pocket from the entry TU
 - the remaining interactive Win32 runtime pocket for touch registration,
   render/UI thread startup, debug GL callback hookup, Wintab init/skip, icon
   setup, placement restore, optional VR start, splash dismissal, message
@@ -802,6 +812,11 @@ Current slice:
   `Node::GetRTL()` now also lives in `src/legacy_ui_node_style.*` instead of
   staying inline in `src/node.cpp`, which trims another coherent generic node
   shell pocket without changing the public surface.
+- The remaining generic `Node` lifecycle/state pocket for no-op lifecycle
+  hooks, add/remove propagation, move construction, destruction cleanup, and
+  base clone plumbing now also lives in `src/legacy_ui_node_lifecycle.*`
+  instead of staying inline in `src/node.cpp`, which materially thins another
+  coherent generic scene-graph shell without changing the public surface.
 
 Write scope:
 - `src/node.cpp`