Add stroke script document automation

docs/modernization/roadmap.md

@@ -371,9 +371,12 @@ PPI and verifies it through inspect/load smoke coverage.
 `pano_cli simulate-stroke` exercises the pure stroke sampler for
 scripted-stroke automation. `pano_cli simulate-stroke-script`
 loads stroke script fixtures, parses them through `pp_paint`, and samples every
-stroke. `pano_cli parse-layout` exercises the XML layout path. Continue
-expanding document behavior toward legacy Canvas parity and then port OpenGL
-classes behind the renderer boundary.
+stroke. `pano_cli apply-stroke-script` maps sampled script points into a
+bounded `pp_document` RGBA8 face payload, writes a PPI file, and verifies that
+the applied stroke payload survives inspect/load round-trip automation.
+`pano_cli parse-layout` exercises the XML layout path. Continue expanding
+document behavior toward legacy Canvas parity and then port OpenGL classes
+behind the renderer boundary.
 
 Implementation tasks:
 
@@ -753,6 +756,10 @@ Results:
 - `pano_cli_save_document_project_roundtrip_smoke` passed and proves a pure
   `pp_document` export can be written to a PPI file, inspected for layer/frame
   dirty-face descriptors, and loaded back through the PPI import path.
+- `pano_cli_apply_stroke_script_roundtrip_smoke` passed and proves a checked-in
+  stroke script can be parsed, sampled, applied to a pure `pp_document` face
+  payload, written to PPI, inspected for the expected dirty-face box, and loaded
+  back as decoded document pixel data.
 - `pano_cli_parse_layout_smoke` passed.
 - `pano_cli_simulate_stroke_smoke` passed and reports deterministic stroke
   sample counts/distances.
@@ -833,6 +840,9 @@ Results:
   automation for agents.
 - `pano_cli save-document-project` exposes file-writing document export
   automation for inspect/load round trips.
+- `pano_cli apply-stroke-script` exposes file-driven stroke-script application
+  to a pure document face payload and writes a PPI artifact for inspect/load
+  round-trip automation.
 - Snapshot creation now rejects invalid embedded RGBA8 face payloads before
   document export or history can persist malformed state.
 - PowerShell package-smoke wrapper validates the Windows CMake app executable