fix(win): update wgpu-native to v27, unify Windows/macOS API paths

- fetch_win_deps.sh: update wgpu-native v0.19.4.1 → v27.0.4.0 (same as macOS)
- platform.h: remove v0.19 compat shims, Windows now uses WGPUStringView API
- gpu.cc/gpu.h: remove DEMO_CROSS_COMPILE_WIN32 old-API branches
- texture_readback.cc, visual_debug.cc, hybrid3d_effect.cc: same cleanup
- rotating_cube_effect.cc: remove #ifdef guard for depthSlice
- glfw3webgpu.c: remove old WGPUSurfaceDescriptorFromWindowsHWND branch
- asset_manager.cc: fix DEMO_STRIP_ALL→STRIP_ALL guard (vs_main was missing
  in STRIP_ALL Windows builds because disk-loading path ran on embedded data)
- tracker.cc: skip MP3 assets gracefully in STRIP_ALL builds instead of fatal

handoff(Gemini): Windows .exe now runs under Wine. demo64k.exe renders frames
and progresses through audio timeline. Pre-existing test failures unchanged.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

3 files changed, 18 insertions, 28 deletions

diff --git a/scripts/build_win.sh b/scripts/build_win.sh
index da75748..4b7f576 100755
--- a/scripts/build_win.sh
+++ b/scripts/build_win.sh
@@ -15,32 +15,23 @@ cmake -S . -B build_win \
     -DDEMO_CROSS_COMPILE_WIN32=ON \
     -DDEMO_STRIP_ALL=ON \
     -DASSET_PACKER_PATH=$ASSET_PACKER_PATH \
-    -DTRACKER_COMPILER_PATH=$TRACKER_COMPILER_PATH
+    -DTRACKER_COMPILER_PATH=$TRACKER_COMPILER_PATH \
+    "-DCMAKE_EXE_LINKER_FLAGS=-static-libgcc -static-libstdc++ -Wl,-Bstatic -lwinpthread -Wl,-Bdynamic"
 
 cmake --build build_win -j8
 
 # 3. Copy runtime DLLs to build_win so we can run it
 cp third_party/windows/lib/wgpu_native.dll build_win/
 
-# Copy MinGW DLLs (pthread, etc.)
-echo "Copying MinGW DLLs..."
-if [[ "$(uname)" == "Darwin" ]]; then
-    MINGW_SEARCH_ROOTS="/opt/homebrew"
-else
-    # Linux / WSL: mingw-w64 installed via apt
-    MINGW_SEARCH_ROOTS="/usr/x86_64-w64-mingw32 /usr/lib/gcc/x86_64-w64-mingw32"
+# Copy libwinpthread-1.dll (wgpu_native.dll depends on it even when exe statically links it)
+WINPTHREAD_DLL=$(x86_64-w64-mingw32-gcc --print-file-name=libwinpthread-1.dll 2>/dev/null)
+if [ ! -f "$WINPTHREAD_DLL" ]; then
+    WINPTHREAD_DLL=$(find /opt/homebrew /usr /usr/local -path "*x86_64*" -name "libwinpthread-1.dll" 2>/dev/null | head -1)
 fi
-COPIED=0
-for dll in libwinpthread-1.dll libgcc_s_seh-1.dll libstdc++-6.dll; do
-    src=$(find $MINGW_SEARCH_ROOTS -name "$dll" 2>/dev/null | head -n 1)
-    if [ -n "$src" ]; then
-        cp "$src" build_win/
-        echo "  Copied: $dll"
-        COPIED=$((COPIED+1))
-    fi
-done
-if [ "$COPIED" -eq 0 ]; then
-    echo "Warning: Could not find MinGW DLLs. You might need them to run the exe."
+if [ -f "$WINPTHREAD_DLL" ]; then
+    cp "$WINPTHREAD_DLL" build_win/
+else
+    echo "Warning: libwinpthread-1.dll not found — Wine may fail to run"
 fi
 
 # 4. Crunch the binary
diff --git a/scripts/fetch_win_deps.sh b/scripts/fetch_win_deps.sh
index a32f047..c66fc34 100755
--- a/scripts/fetch_win_deps.sh
+++ b/scripts/fetch_win_deps.sh
@@ -13,17 +13,17 @@ cp glfw-3.4.bin.WIN64/lib-mingw-w64/libglfw3.a third_party/windows/lib/
 cp glfw-3.4.bin.WIN64/include/GLFW/* third_party/windows/include/GLFW/
 rm -rf glfw.zip glfw-3.4.bin.WIN64
 
-echo "Fetching wgpu-native v0.19.4.1..."
-curl -L -o wgpu.zip https://github.com/gfx-rs/wgpu-native/releases/download/v0.19.4.1/wgpu-windows-x86_64-release.zip
+echo "Fetching wgpu-native v27.0.4.0..."
+curl -L -o wgpu.zip https://github.com/gfx-rs/wgpu-native/releases/download/v27.0.4.0/wgpu-windows-x86_64-msvc-release.zip
 unzip -q wgpu.zip -d wgpu_temp
-# Copy import library (renaming for MinGW convention, though it can usually read .lib)
-cp wgpu_temp/wgpu_native.dll.lib third_party/windows/lib/libwgpu_native.dll.a
+# Copy import library (renaming for MinGW convention)
+cp wgpu_temp/lib/wgpu_native.dll.lib third_party/windows/lib/libwgpu_native.dll.a
 # Copy runtime DLL (will be needed next to executable)
-cp wgpu_temp/wgpu_native.dll third_party/windows/lib/wgpu_native.dll
+cp wgpu_temp/lib/wgpu_native.dll third_party/windows/lib/wgpu_native.dll
 # Copy headers
 mkdir -p third_party/windows/include/webgpu
-cp wgpu_temp/webgpu.h third_party/windows/include/webgpu/
-cp wgpu_temp/wgpu.h third_party/windows/include/webgpu/
+cp wgpu_temp/include/webgpu/webgpu.h third_party/windows/include/webgpu/
+cp wgpu_temp/include/webgpu/wgpu.h third_party/windows/include/webgpu/
 rm -rf wgpu.zip wgpu_temp
 
 echo "Windows dependencies fetched."
diff --git a/scripts/run_win.sh b/scripts/run_win.sh
index 853a985..fabb3fe 100755
--- a/scripts/run_win.sh
+++ b/scripts/run_win.sh
@@ -5,5 +5,4 @@ if [ ! -f build_win/demo64k.exe ]; then
 fi
 
 echo "Running with Wine..."
-# Wine might output a lot of debug info, but for now we let it flow.
-wine build_win/demo64k.exe "$@"
+WINEPATH="$(pwd)/build_win" wine build_win/demo64k.exe "$@"