modernize build system and toolchain

- unified MSVC toolchain migration (v143 → v145) with solution/tooling normalization
- Visual Studio solution alignment and project system cleanup (vcxproj/vcxproj.filters across client/server/missionchooser)
- artifact and output model standardization (intermediate/output layout, naming, linker path consistency)
- build pipeline modernization (robocopy-based deployment, structured pre/post build execution, normalized error handling)
- CI toolchain alignment (GitHub Actions upgrade: runner image, MSBuild integration, checkout/action modernization)
- client video subsystem dependency graph migration (VPX/WebM library replacement, legacy lib removal, vpx_tpl integration)
- ABI boundary stabilization for debug builds (conditional thunk resolution for MSVC debug symbol indirection to preserve legacy callsite assumptions under toolchain upgrade)
- cross-configuration library set segregation validation (Debug/Release/Profile VPX/WebM linking correctness enforcement)

Author: Kitsune44

.github/workflows/build.yaml

@@ -16,30 +16,38 @@ on:
 jobs:
   release:
     name: build release
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     timeout-minutes: 30
     steps:
       #checkout project
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+
+      - name: Install MSVC Toolset version 14.50
+        shell: cmd
+        run: |
+          "C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installer.exe" modify ^
+          --installPath "C:\Program Files\Microsoft Visual Studio\18\Enterprise" ^
+          --add Microsoft.VisualStudio.Component.VC.14.50.x86.x64 ^
+          --passive --norestart
 
       # setup msbuild
       - name: Add msbuild to PATH
-        uses: microsoft/setup-msbuild@v1.1
+        uses: microsoft/setup-msbuild@v2
 
       # missionchooser.dll
       - name: Build missionchooser.dll
         working-directory: src/game/missionchooser
-        run: MSBuild.exe swarm_sdk_missionchooser.vcxproj -property:Configuration=Release
+        run: MSBuild.exe swarm_sdk_missionchooser.vcxproj -property:Configuration=Release -property:Platform=Win32
 
       # server.dll
       - name: Build server.dll
         working-directory: src/game/server
-        run: MSBuild.exe swarm_sdk_server.vcxproj -property:Configuration=Release
+        run: MSBuild.exe swarm_sdk_server.vcxproj -property:Configuration=Release -property:Platform=Win32
 
       # client.dll
       - name: Build client.dll
         working-directory: src/game/client
-        run: MSBuild.exe swarm_sdk_client.vcxproj -property:Configuration=Release
+        run: MSBuild.exe swarm_sdk_client.vcxproj -property:Configuration=Release -property:Platform=Win32
 
       # store artifacts
       # make sure retention is low, this can become huge otherwise
@@ -54,30 +62,30 @@ jobs:
 
   debug:
     name: build debug
-    runs-on: windows-2022
+    runs-on: windows-2025-vs2026
     timeout-minutes: 30
     steps:
       #checkout project
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       # setup msbuild
       - name: Add msbuild to PATH
-        uses: microsoft/setup-msbuild@v1.1
+        uses: microsoft/setup-msbuild@v2
 
       # missionchooser.dll
       - name: Build missionchooser.dll
         working-directory: src/game/missionchooser
-        run: MSBuild.exe swarm_sdk_missionchooser.vcxproj -property:Configuration=Debug
+        run: MSBuild.exe swarm_sdk_missionchooser.vcxproj -property:Configuration=Debug -property:Platform=Win32
 
       # server.dll
       - name: Build server.dll
         working-directory: src/game/server
-        run: MSBuild.exe swarm_sdk_server.vcxproj -property:Configuration=Debug
+        run: MSBuild.exe swarm_sdk_server.vcxproj -property:Configuration=Debug -property:Platform=Win32
 
       # client.dll
       - name: Build client.dll
         working-directory: src/game/client
-        run: MSBuild.exe swarm_sdk_client.vcxproj -property:Configuration=Debug
+        run: MSBuild.exe swarm_sdk_client.vcxproj -property:Configuration=Debug -property:Platform=Win32
 
       # store artifacts
       # make sure retention is low, this can become huge otherwise

src/game/client/swarm/rd_tooltip_fix.cpp

@@ -26,7 +26,15 @@ static class CRD_Tooltip_Fix final : public CAutoGameSystem
 		// There's only one method in the vtable, so let's just grab it.
 		auto pApplySchemeSettings = **reinterpret_cast< void( vgui::Tooltip:: *const *const * )( vgui::IScheme * ) >( pTooltip );
 
-		byte *pRealFunc = *reinterpret_cast< byte *const * >( &pApplySchemeSettings );
+		#ifdef _DEBUG
+			// This is a thunk, so we need to grab the real one.
+			byte *pThunk = *reinterpret_cast<byte *const *>( &pApplySchemeSettings );
+			Assert( *pThunk == 0xE9 );
+			byte *pRealFunc = pThunk + 5 + *reinterpret_cast<const intptr_t *>( pThunk + 1 );
+		#else
+			// ...except in release builds, where it's not a thunk.
+			byte *pRealFunc = *reinterpret_cast<byte *const *>( &pApplySchemeSettings );
+		#endif
 		Assert( *pRealFunc == 0xB9 );
 
 		// Grab the TextEntry handle that is read at the start of the method.

src/game/client/swarm/vgui/rd_vgui_settings_video.cpp

@@ -92,6 +92,12 @@ static class CRD_VideoConfigVariableListHack : public CAutoGameSystem
 		// Instead, we have to do this garbage:
 		const byte *pUpdateCurrentVideoConfig = reinterpret_cast< const byte * >( &UpdateCurrentVideoConfig );
 
+		#ifdef _DEBUG
+			// Gotta deal with thunks on debug builds.
+			Assert( *pUpdateCurrentVideoConfig == 0xE9 );
+			pUpdateCurrentVideoConfig += 5 + *reinterpret_cast<const intptr_t *>( pUpdateCurrentVideoConfig + 1 );
+		#endif
+
 		struct VideoConfigSetting_t
 		{
 			const char *m_szName;