fix(ci): add wasm-opt to PATH for Windows Emscripten builds

Windows runners need explicit PATH setup to access wasm-opt from Emscripten's upstream/bin directory. The emsdk_env.sh script doesn't properly expose wasm-opt to subsequent build steps on Windows.

Author: jdalton

.github/workflows/build-sea.yml

@@ -144,7 +144,17 @@ jobs:
             cd emsdk
             ./emsdk install latest
             ./emsdk activate latest
-            source ./emsdk_env.sh
+
+            # Source emsdk environment
+            if [ "$RUNNER_OS" = "Windows" ]; then
+              # On Windows with Git Bash, we need to explicitly set PATH
+              source ./emsdk_env.sh
+              # Also add upstream/bin to PATH for wasm-opt
+              export PATH="$(pwd)/upstream/bin:$PATH"
+            else
+              source ./emsdk_env.sh
+            fi
+
             cd ..
             echo "::endgroup::"
           fi