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>

1 files changed, 10 insertions, 19 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