Rebuild local Blender WASM environment and recovery evidence

tools/web/cmake/pkgconfig/shaderc.pc

@@ -0,0 +1,9 @@
+prefix=${pcfiledir}/../../../../.deps/native/shaderc
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: shaderc
+Description: Shaderc compiler used by Blender Vulkan
+Version: 2025.4
+Libs: -L${libdir} -lshaderc_combined -lSPIRV-Tools-opt -lSPIRV-Tools
+Cflags: -I${includedir}

tools/web/cmake/pkgconfig/vulkan.pc

@@ -0,0 +1,10 @@
+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib/x86_64-linux-gnu
+includedir=${pcfiledir}/../../../../.deps/native/vulkan_headers/include
+
+Name: Vulkan
+Description: Vulkan headers and loader for the Blender native build
+Version: 1.4.341
+Libs: -L${libdir} -lvulkan
+Cflags: -I${includedir}