port: purge obsolete GDScript UI, legacy flows, and deprecated controllers

- Purged 66 obsolete GDScript UI components and mobile prototype UI from project/ui/ (retaining ui_assets.gd)
- Purged deprecated GDScript game scene, flow state machines, and local gameplay controllers (app_flow, game_scene, player_controller, net_world, etc.)
- Purged deprecated local system simulation scripts (consumable_system, chest_system, equip_rules, etc.) and project/fx/
- Purged legacy GDScript unit tests targeting obsolete classes
- Unified viewport back buffer sizing in CGraphicBase/CGraphicDevice/PythonBoot
- Cleaned up client_main.gd and python_host_check.gd for pure native port architecture
- Verified all port tests passing: port_map.py check (0 errors), port_gate.sh macos PASS (19/19 suites), python_game_render_test PASS

extension/src/platform/EterLib/GrpDevice.cpp

@@ -167,10 +167,13 @@ auto CGraphicDevice::MoveWebBrowserRect(const RECT &) -> void
 	MT_PLATFORM_STUB();
 }
 
-auto CGraphicDevice::ResizeBackBuffer(UINT, UINT) -> bool
+auto CGraphicDevice::ResizeBackBuffer(UINT uWidth, UINT uHeight) -> bool
 {
-	MT_PLATFORM_STUB();
-	return mt_platform_stub_return<bool>();
+	ms_iWidth = uWidth;
+	ms_iHeight = uHeight;
+	ms_d3dPresentParameter.BackBufferWidth = uWidth;
+	ms_d3dPresentParameter.BackBufferHeight = uHeight;
+	return true;
 }
 
 auto CGraphicDevice::RegisterWarningString(UINT, const char *) -> void

extension/src/platform/ScriptLib/PythonBoot.cpp

@@ -7,6 +7,7 @@
 #include "EterPythonLib/StdAfx.h"
 #include "EterBase/Timer.h"
 #include "EterLib/Util.h"
+#include "EterLib/GrpBase.h"
 #include "../EterLib/HostCursor.h"
 #include "UserInterface/PythonNetworkStream.h"
 #include "UserInterface/AccountConnector.h"
@@ -239,6 +240,7 @@ void SetUISize(int width, int height)
 	g_window_manager->SetScreenSize(width, height);
 	g_window_manager->SetResolution(width, height);
 	UIRenderSetSize(width, height);
+	CGraphicBase::SetBackBufferSize(width, height);
 	if (g_game_singletons)
 	{
 		g_game_singletons->pySystem.GetConfig()->width = width;

extension/src/port/EterLib/GrpBase.cpp

@@ -135,6 +135,12 @@ void CGraphicBase::GetBackBufferSize(UINT* puWidth, UINT* puHeight)
 	*puHeight=ms_d3dPresentParameter.BackBufferHeight;
 }
 
+void CGraphicBase::SetBackBufferSize(UINT uWidth, UINT uHeight)
+{
+	ms_d3dPresentParameter.BackBufferWidth = uWidth;
+	ms_d3dPresentParameter.BackBufferHeight = uHeight;
+}
+
 void CGraphicBase::SetDefaultIndexBuffer(UINT eDefIB)
 {
 	if (eDefIB>=DEFAULT_IB_NUM)

extension/src/port/EterLib/GrpBase.h

@@ -205,6 +205,7 @@ class CGraphicBase
 		
 		void		SetViewport(DWORD dwX, DWORD dwY, DWORD dwWidth, DWORD dwHeight, float fMinZ, float fMaxZ);
 		static void		GetBackBufferSize(UINT* puWidth, UINT* puHeight);
+		static void		SetBackBufferSize(UINT uWidth, UINT uHeight);
 		static bool		IsTLVertexClipping();
 		static bool		IsFastTNL();
 		static bool		IsLowTextureMemory();