docs(parity): mirror 40250 layout for the logic layer; evaluate embedded Python UI

- SKILL.md: logic units port into extension/src/port/<Lib>/<File>, platform
  adapters under extension/src/platform; legacy GDScript owners are migration
  sources; python layer frozen until the embedding decision
- port_map.py: logic/python/platform layers with per-layer progress, queue
  --layer, LEGACY layout check; inventory adds EterBase, EterPythonLib,
  ScriptLib, SpeedTreeLib, SphereLib, EterImageLib
- py_embed_spike.py + docs/PYTHON-EMBED-EVAL.md: the 40250 system.py bootstrap
  loads 67/74 root modules unchanged under CPython 2.7 with stub natives

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.agents/skills/metin2-40250-parity-audit/references/project-map.md

@@ -34,7 +34,16 @@
 - Native extension: `extension/src/` (network in `extension/src/net/`, classic 40250 protocol in `extension/src/net/classic/`).
 - Format readers: `formats/`; Granny: `libgr2/`; assets/tables: `assets/`; Granny oracle: `oracle/`; tools: `tools/`.
 
-### Known counterparts
+### Target layout
+
+- `extension/src/port/<Lib>/<File>.{h,cpp}` — mirror of each 40250 `logic` unit (see SKILL.md
+  "Code layout"). Does not exist yet; the first ported unit creates it and adds it to
+  `extension/CMakeLists.txt`.
+- `extension/src/platform/` — adapter interfaces named after the 40250 platform classes they replace.
+- The files in the table below are **migration sources**: when a unit is ported, its logic moves out
+  of them into the mirror file.
+
+### Legacy counterparts (migration sources)
 
 | 40250 | Current |
 | --- | --- |
@@ -47,14 +56,12 @@
 | `CPythonPlayer` skill use | `project/player_skill.gd` |
 | `CFlyingObject*` | `project/fly_object.gd` |
 | `EterLib/Camera.cpp` + `PythonApplicationCamera` | `project/game_camera.gd` |
-| `ui*.py` windows | `project/ui/*_ui.gd` |
+| `ui*.py` windows | `project/ui/*_ui.gd` (ported from the wrong `assets/root`; replaced by the python layer) |
 
-### Code that is not a counterpart
+### Removed non-counterparts
 
-About 100 of the 111 `project/*_system.gd` files are loaded only by their own
-`project/test_*_parity.gd` (never by the runtime). They are not implementations of 40250
-behavior and their tests are not evidence; delete them, or replace them by porting the real 40250
-code path when that path exists.
+The 106 `project/*_system.gd` files that only their own `test_*_parity.gd` loaded were deleted on
+2026-09-22 (commit `a989b8f1`). Do not recreate them; port the real 40250 code path instead.
 
 ## Existing evidence (historical)