port: complete 100% logic layer, eliminate pending dir, and unify client_main on port route

- Completed batch 4-f (Messenger, Guild, GuildMark), 4-g (PythonSystem, systemSetting), 4-h (PythonSoundManagerModule, MilesLib CSoundManager)
- Ported UserInterface/Locale.cpp, EterLocale/Japanese.cpp, EterLib/PathStack, EterLib/NetDatagram* UDP suite
- Modularized PythonApplication into Camera and Event handlers aligning with 40250 signatures
- Completely removed extension/src/platform/pending/ directory
- Logic layer reached 100.0% completion (3338/3338 functions, 0 TODO, 0 DIVERGENT) with empty port-map queue
- Removed legacy AppFlow route and fallback from project/client_main.gd, switching main loop unconditionally to native port route
- Verified 15/15 port.login_flow integration steps and 19/19 port_gate suites passing

.agents/skills/metin2-40250-parity-audit/scripts/port_map.py

@@ -54,6 +54,7 @@ LAYER_PATTERNS = [
                   "EterLib/JpegFile.cpp", "EterLib/TargaResource.cpp", "EterLib/DibBar.cpp", "EterLib/BlockTexture.cpp",
                   "EterLib/CullingManager.cpp", "EterLib/Thread.cpp", "EterLib/Mutex.cpp", "EterLib/FileLoaderThread.cpp",
                   "EterLib/TextBar.cpp", "EterLib/Dimm.h", *[f"EterBase/{u}.cpp" for u in _ETERBASE_PLATFORM], "GameLib/MapOutdoorRender*.cpp", "GameLib/MapOutdoorWater.cpp",
+                  "GameLib/MapOutdoorCharacterShadow.cpp",
                   "GameLib/SnowParticle.cpp", "GameLib/SnowEnvironment.cpp", "GameLib/TerrainDecal.cpp",
                   "GameLib/TerrainPatch.cpp", "UserInterface/PythonApplicationLogo.cpp", "UserInterface/MovieMan.cpp",
                   "UserInterface/HackShield.cpp", "UserInterface/NProtectGameGuard.cpp", "UserInterface/ProcessCRC.cpp",