build: strip macOS Electron binaries after pack

package.json

@@ -22,6 +22,7 @@
     "electronLanguages": [
       "en"
     ],
+    "afterPack": "./scripts/strip-macos-binaries.js",
     "files": [
       "src/**/*",
       "assets/**/*",

scripts/strip-macos-binaries.js

@@ -0,0 +1,39 @@
+const { execFileSync } = require('node:child_process');
+const fs = require('node:fs');
+const path = require('node:path');
+
+function walk(dir, out = []) {
+  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+    const full = path.join(dir, entry.name);
+    if (entry.isDirectory()) walk(full, out);
+    else out.push(full);
+  }
+  return out;
+}
+
+function isMachO(file) {
+  try {
+    const out = execFileSync('file', ['-b', file], { encoding: 'utf8' });
+    return out.includes('Mach-O');
+  } catch {
+    return false;
+  }
+}
+
+exports.default = async function afterPack(context) {
+  if (context.electronPlatformName !== 'darwin') return;
+
+  const appOutDir = context.appOutDir;
+  const appName = `${context.packager.appInfo.productFilename}.app`;
+  const appPath = path.join(appOutDir, appName);
+
+  const targets = walk(appPath).filter(isMachO);
+
+  for (const file of targets) {
+    try {
+      execFileSync('strip', ['-x', file], { stdio: 'inherit' });
+    } catch (err) {
+      console.warn(`[strip] skipped ${file}: ${err.message}`);
+    }
+  }
+};