docs: add macOS build and packaging instructions

- Add detailed macOS build procedure for Electron app
- Include instructions for Intel and Universal builds
- Add code signing and notarization requirements
- Document running instructions for .app, .dmg, and .zip formats
- Add security warning handling instructions

package.json

@@ -41,7 +41,9 @@
     "fastlane:ios:beta": "cd ios && fastlane beta",
     "fastlane:ios:release": "cd ios && fastlane release",
     "fastlane:android:beta": "cd android && fastlane beta",
-    "fastlane:android:release": "cd android && fastlane release"
+    "fastlane:android:release": "cd android && fastlane release",
+    "electron:build-mac": "npm run build:electron-prod && electron-builder --mac",
+    "electron:build-mac-universal": "npm run build:electron-prod && electron-builder --mac --universal"
   },
   "dependencies": {
     "@capacitor-mlkit/barcode-scanning": "^6.0.0",
@@ -185,6 +187,29 @@
       "category": "Office",
       "icon": "build/icon.png"
     },
-    "asar": true
+    "asar": true,
+    "mac": {
+      "target": ["dmg", "zip"],
+      "category": "public.app-category.productivity",
+      "icon": "build/icon.png",
+      "hardenedRuntime": true,
+      "gatekeeperAssess": false,
+      "entitlements": "build/entitlements.mac.plist",
+      "entitlementsInherit": "build/entitlements.mac.plist"
+    },
+    "dmg": {
+      "contents": [
+        {
+          "x": 130,
+          "y": 220
+        },
+        {
+          "x": 410,
+          "y": 220,
+          "type": "link",
+          "path": "/Applications"
+        }
+      ]
+    }
   }
 }