ci(windows): use sha256sum for cross-platform hash computation

.github/workflows/ci.yml

@@ -272,9 +272,7 @@ jobs:
           pnpm install --frozen-lockfile --ignore-scripts=false --config.engine-strict=false --config.enable-pre-post-scripts=true || pnpm install --frozen-lockfile --ignore-scripts=false --config.engine-strict=false --config.enable-pre-post-scripts=true
 
       - name: Run ${{ matrix.task }} (${{ matrix.runtime }})
-        run: |
-          export PATH="/c/Program Files/Git/usr/bin:$PATH"
-          ${{ matrix.command }}
+        run: ${{ matrix.command }}
 
   checks-macos:
     if: github.event_name == 'pull_request'

scripts/bundle-a2ui.sh

@@ -30,11 +30,20 @@ collect_files() {
 }
 
 compute_hash() {
-  collect_files \
-    | LC_ALL=C sort -z \
-    | xargs -0 shasum -a 256 \
-    | shasum -a 256 \
-    | awk '{print $1}'
+  # Use sha256sum (more portable on Windows) or fall back to shasum
+  if command -v sha256sum >/dev/null 2>&1; then
+    collect_files \
+      | LC_ALL=C sort -z \
+      | xargs -0 sha256sum \
+      | sha256sum \
+      | awk '{print $1}'
+  else
+    collect_files \
+      | LC_ALL=C sort -z \
+      | xargs -0 shasum -a 256 \
+      | shasum -a 256 \
+      | awk '{print $1}'
+  fi
 }
 
 current_hash="$(compute_hash)"