Route onion frame planning through app core

docs/modernization/build-inventory.md

@@ -246,9 +246,11 @@ Known local toolchain state:
 - `src/legacy_document_animation_services.*` is the current UI-shell bridge for
   animation frame commands, timeline/selected-frame execution, playback ticks,
   onion-size updates, and play-mode toggles. It keeps those live paths on the
-  `pp_app_core` contracts while legacy `Canvas`/`Layer` frame state, canvas
-  mode, animation-panel timeline/playback fields, and the temporary
-  `NodePanelAnimation` friend adapter remain tracked by `DEBT-0022`.
+  `pp_app_core` contracts. `NodeCanvas` onion-skin panorama drawing now also
+  consumes the tested `pp_app_core` onion frame range and alpha falloff helper,
+  while legacy `Canvas`/`Layer` frame state, canvas mode, animation-panel
+  timeline/playback fields, and the temporary `NodePanelAnimation` friend
+  adapter remain tracked by `DEBT-0022`.
 - `src/legacy_brush_ui_services.*` is the current UI-shell bridge for brush
   color, texture, preset, stroke-refresh, brush texture-list, and stroke-control
   execution. `NodePanelBrushPreset` now consumes `pp_app_core` preset-list

docs/modernization/debt.md

@@ -35,6 +35,11 @@ agent or engineer to remove them without reconstructing context from chat.
   blocker matrix without requiring an app build first, and
   `panopainter_package_smoke_readiness_self_test` guards package-kind parity
   across both wrappers. Package target migration remains open.
+- 2026-06-05: DEBT-0022 was narrowed. `pp_app_core` now owns tested
+  onion-skin frame range and alpha falloff planning, and live `NodeCanvas`
+  panorama drawing consumes that helper instead of open-coding frame clamping
+  and opacity falloff in the render loop. Legacy canvas/layer/UI execution
+  remains open under DEBT-0022.
 - 2026-06-04: DEBT-0036 was narrowed again. Canvas stroke commit,
   thumbnail, and object-draw history paths now query saved blend state through
   tested `pp_renderer_gl` capability-state dispatch; CanvasLayer equirect

docs/modernization/roadmap.md

@@ -527,6 +527,8 @@ before the legacy layer-panel merge adapter continues.
 frame add, duplicate, remove, duration adjustment, timeline moves, timeline
 goto/next/previous, onion-size updates, frame selection, no-reload playback
 stepping, and play-mode toggles used by the live animation panel.
+`pp_app_core` also owns onion-skin frame range and alpha falloff planning now
+consumed by live `NodeCanvas` panorama drawing.
 `pano_cli plan-animation-panel-action` exposes the higher-level animation panel
 state/action planner for goto, next, previous, playback-step, and play-toggle
 automation without requiring the legacy UI or canvas.
@@ -1694,8 +1696,9 @@ Results:
   goto/next/previous wrapping, onion-size rejection, service dispatch ordering,
   frame-click selection planning, no-reload playback step planning,
   playback toggle start/stop planning, animation panel action planning,
-  invalid panel timeline state rejection, non-mutating duration no-ops, and
-  malformed execution payload rejection.
+  invalid panel timeline state rejection, non-mutating duration no-ops, tested
+  onion-skin frame range/alpha falloff planning consumed by live `NodeCanvas`
+  panorama drawing, and malformed execution payload rejection.
 - `pano_cli_plan_animation_operation_add_smoke`,
   `pano_cli_plan_animation_operation_duration_floor_smoke`,
   `pano_cli_plan_animation_operation_next_wrap_smoke`,