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, 0 insertions, 6 deletions

diff --git a/src/effects/hybrid3_d_effect.cc b/src/effects/hybrid3_d_effect.cc
index 37d4158..33a2d73 100644
--- a/src/effects/hybrid3_d_effect.cc
+++ b/src/effects/hybrid3_d_effect.cc
@@ -33,15 +33,9 @@ Hybrid3D::Hybrid3D(const GpuContext& ctx,
 
   // Write white pixel
   uint32_t white_pixel = 0xFFFFFFFF;
-#if defined(DEMO_CROSS_COMPILE_WIN32)
-  WGPUImageCopyTexture dst = {
-      .texture = dummy_texture_, .mipLevel = 0, .origin = {0, 0, 0}};
-  WGPUTextureDataLayout data_layout = {.bytesPerRow = 4, .rowsPerImage = 1};
-#else
   WGPUTexelCopyTextureInfo dst = {
       .texture = dummy_texture_, .mipLevel = 0, .origin = {0, 0, 0}};
   WGPUTexelCopyBufferLayout data_layout = {.bytesPerRow = 4, .rowsPerImage = 1};
-#endif
   WGPUExtent3D size = {1, 1, 1};
   wgpuQueueWriteTexture(ctx_.queue, &dst, &white_pixel, 4, &data_layout, &size);