Extract node lifecycle, preview runtime, and Win32 input state

docs/modernization/roadmap.md

@@ -82,10 +82,10 @@ Current hotspot files:
 - `src/canvas.cpp`: 429 lines
 - `src/app_layout.cpp`: 125 lines
 - `src/canvas_modes.cpp`: 402 lines
-- `src/node.cpp`: 389 lines
-- `src/main.cpp`: 166 lines
+- `src/node.cpp`: 260 lines
+- `src/main.cpp`: 141 lines
 - `src/node_panel_brush.cpp`: 337 lines
-- `src/node_stroke_preview.cpp`: 562 lines
+- `src/node_stroke_preview.cpp`: 545 lines
 - `src/node_canvas.cpp`: 219 lines
 - `src/app.cpp`: 171 lines
 - `src/app_dialogs.cpp`: 168 lines
@@ -216,7 +216,10 @@ Current architecture mismatches that must be treated as real blockers:
   `src/platform_windows/windows_bootstrap_helpers.cpp` instead of
   `src/main.cpp`, while the Win32 window procedure and retained message-handling
   shell now also live in `src/platform_windows/windows_window_shell.*`
-  instead of `src/main.cpp`, while the remaining interactive Win32 runtime
+  instead of `src/main.cpp`, while retained input-state zeroing and reverse
+  key-map initialization now also live in
+  `src/platform_windows/windows_window_shell.*` instead of `src/main.cpp`,
+  while the remaining interactive Win32 runtime
   pocket for touch registration, render/UI thread startup, GL debug callback
   hookup, Wintab initialization/skip, icon setup, placement restore, optional
   VR start, splash dismissal, message loop, and shutdown cleanup now also
@@ -248,7 +251,11 @@ Current architecture mismatches that must be treated as real blockers:
   the remaining immediate preview pass shell now also routes through
   `execute_legacy_node_stroke_preview_draw_immediate_shell(...)`, which
   materially reduces the live preview-pass body even though broader
-  worker/readback flow still remains inline, while
+  worker/readback flow still remains inline, while the immediate preview
+  runtime/orchestration block for stroke setup, prepared-stroke construction,
+  pass planning, shader setup, and live render request assembly now also
+  routes through `src/legacy_node_stroke_preview_runtime_services.*` instead
+  of staying inline in `src/node_stroke_preview.cpp`, while
   `NodeCanvas::draw()` unmerged-pass blend-gate, layer-orientation, and
   callback-assembly setup now also route through
   `execute_node_canvas_draw_unmerged_pass(...)`, which trims another coherent
@@ -333,7 +340,11 @@ Current architecture mismatches that must be treated as real blockers:
   `clear_context`, `update`, `update_internal`, and `tick` now also lives in
   `src/legacy_ui_node_execution.cpp`, while `Node::parse_attributes(...)` now
   also routes through `src/legacy_ui_node_attributes.*` instead of staying
-  inline in `src/node.cpp`,
+  inline in `src/node.cpp`, while 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 routes through
+  `src/legacy_ui_node_lifecycle.*` instead of staying inline in
+  `src/node.cpp`,
   while `Canvas` point-trace/unproject/project/camera push-pop-get-set and
   face-to-shape helpers now also route through
   `src/legacy_canvas_projection_services.*` instead of staying inline in

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`