refactor: extract asar from electron-builder output instead of custom script

.github/workflows/build-release.yml

@@ -136,9 +136,17 @@ jobs:
         if: steps.version-check.outputs.SKIP == 'false'
         run: npx electron-builder --linux -c.electronDist=node_modules/electron/dist-linux --publish never
 
-      - name: Build asar for patch updates
+      - name: Extract asar for patch updates
         if: steps.version-check.outputs.SKIP == 'false' && steps.release-type.outputs.TYPE == 'patch'
-        run: npm run build:asar
+        run: |
+          # The asar is a byproduct of the Linux build — platform-independent (just JS)
+          ASAR_SRC="out/linux-unpacked/resources/app.asar"
+          ASAR_DIR="out/asar"
+          mkdir -p "$ASAR_DIR"
+          cp "$ASAR_SRC" "$ASAR_DIR/app.asar"
+          sha256sum "$ASAR_DIR/app.asar" | awk '{print $1 "  app.asar"}' > "$ASAR_DIR/checksums.sha256"
+          echo "Extracted asar: $(du -h "$ASAR_DIR/app.asar" | cut -f1)"
+          cat "$ASAR_DIR/checksums.sha256"
 
       - name: Report build sizes
         if: steps.version-check.outputs.SKIP == 'false'