Fix Linux Electron icon

I can't build this locally over some strange permissions issue. I'm pushing to try if it works on CI.

I've tried many suggestions mentioned in the following PRs, but nothing worked. This one seems to at least try to do something about the icns file, though it's failing locally, like I said:

- https://github.com/electron-userland/electron-builder/issues/748
- https://github.com/electron-userland/electron-builder/issues/2269
- https://github.com/electron-userland/electron-builder/issues/4617
- https://github.com/electron-userland/electron-builder/pull/5385
- https://github.com/electron-userland/electron-builder/issues/2577#issuecomment-659879082

Related to #123

package-lock.json

@@ -15464,7 +15464,7 @@
         "maildev": {
             "version": "git+ssh://git@github.com/padloc/maildev.git#a3ac6bf682dfb7cbb08b8b86e7b8afc9e5e41c66",
             "dev": true,
-            "from": "maildev@git+ssh://git@github.com:padloc/maildev.git",
+            "from": "maildev@github:padloc/maildev",
             "requires": {
                 "async": "^3.2.3",
                 "commander": "^9.0.0",

packages/electron/package.json

@@ -28,7 +28,7 @@
         "clean-webpack-plugin": "3.0.0",
         "css-loader": "5.2.6",
         "electron": "14.1.1",
-        "electron-builder": "22.13.1",
+        "electron-builder": "22.14.13",
         "electron-notarize": "1.1.1",
         "file-loader": "6.2.0",
         "html-webpack-plugin": "5.3.2",

packages/electron/prepare-build.js

@@ -27,6 +27,8 @@ async function main() {
         .png()
         .toFile(join(buildDir, "icon.png"));
 
+    fs.copyFileSync(join(assetsDir, "app-icon.icns"), join(buildDir, "icon.icns"));
+
     fs.copyFileSync(resolve(__dirname, "entitlements.plist"), join(buildDir, "entitlements.plist"));
 
     const buildConfig = {
@@ -42,11 +44,16 @@ async function main() {
             gatekeeperAssess: false,
             entitlements: "entitlements.plist",
             entitlementsInherit: "entitlements.plist",
+            category: "Utility",
         },
         protocols: {
             name,
             schemes: [scheme],
         },
+        linux: {
+            icon: "./icon.icns",
+            category: "Utility",
+        },
         afterSign: "scripts/notarize.js",
     };