feat(desktop): package Web Shell as a release-ready desktop app

.github/scripts/create-desktop-update-manifest.mjs

@@ -0,0 +1,62 @@
+#!/usr/bin/env node
+
+import fs from 'node:fs';
+import path from 'node:path';
+
+const options = parseArguments(process.argv.slice(2));
+const assets = fs.readdirSync(options.assets).sort();
+const platforms = {};
+const platformArtifacts = [
+  [
+    'darwin-aarch64',
+    selectArtifact(assets, /-aarch64-apple-darwin\.app\.tar\.gz$/i, 'darwin-aarch64'),
+  ],
+  [
+    'darwin-x86_64',
+    selectArtifact(assets, /-x86_64-apple-darwin\.app\.tar\.gz$/i, 'darwin-x86_64'),
+  ],
+  ['windows-x86_64', selectArtifact(assets, /-setup\.exe$/i, 'windows-x86_64')],
+  ['linux-x86_64', selectArtifact(assets, /\.AppImage$/i, 'linux-x86_64')],
+];
+
+for (const [platform, artifact] of platformArtifacts) {
+  const signatureFile = `${artifact}.sig`;
+  if (!assets.includes(signatureFile)) {
+    throw new Error(`Missing updater signature for ${artifact}`);
+  }
+  platforms[platform] = {
+    signature: fs.readFileSync(path.join(options.assets, signatureFile), 'utf8').trim(),
+    url: `https://github.com/${options.repository}/releases/download/${options.tag}/${encodeURIComponent(artifact)}`,
+  };
+}
+
+const manifest = {
+  version: options.version,
+  pub_date: new Date().toISOString(),
+  platforms,
+};
+fs.writeFileSync(options.output, `${JSON.stringify(manifest, null, 2)}\n`);
+
+function selectArtifact(assets, pattern, platform) {
+  const matches = assets.filter((asset) => pattern.test(asset));
+  if (matches.length !== 1) {
+    throw new Error(
+      `Expected one updater artifact for ${platform}, found ${matches.length}: ${matches.join(', ')}`,
+    );
+  }
+  return matches[0];
+}
+
+function parseArguments(args) {
+  const values = {};
+  for (let index = 0; index < args.length; index += 2) {
+    const name = args[index]?.replace(/^--/, '');
+    const value = args[index + 1];
+    if (!name || value === undefined) throw new Error('Invalid arguments.');
+    values[name] = value;
+  }
+  for (const required of ['assets', 'repository', 'tag', 'version', 'output']) {
+    if (!values[required]) throw new Error(`Missing --${required}`);
+  }
+  return values;
+}