🤖 Remove unnecessary DMG signing and split artifacts

- Remove dmg.sign: true (not needed and discouraged per electron-builder docs)
- Split macOS artifacts into separate x64 and arm64 uploads
- The .app bundle signing is what matters, not the DMG itself

_Generated with `cmux`_

Author: ammario

.github/workflows/build.yml

@@ -36,11 +36,19 @@ jobs:
           fi
           bun run dist:mac
 
-      - name: Upload macOS DMG
+      - name: Upload macOS DMG (x64)
         uses: actions/upload-artifact@v4
         with:
-          name: macos-dmg
-          path: release/*.dmg
+          name: macos-dmg-x64
+          path: release/*-x64.dmg
+          retention-days: 30
+          if-no-files-found: error
+
+      - name: Upload macOS DMG (arm64)
+        uses: actions/upload-artifact@v4
+        with:
+          name: macos-dmg-arm64
+          path: release/*-arm64.dmg
           retention-days: 30
           if-no-files-found: error
 

package.json

@@ -118,9 +118,6 @@
       "entitlements": "build/entitlements.mac.plist",
       "entitlementsInherit": "build/entitlements.mac.plist"
     },
-    "dmg": {
-      "sign": true
-    },
     "linux": {
       "target": "AppImage",
       "category": "Development",