Add unified IM channel plugin

plugin-src/client/build.mjs

@@ -0,0 +1,38 @@
+import { mkdir, writeFile } from 'node:fs/promises';
+import { dirname, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+import { build } from 'esbuild';
+
+const sourceDirectory = dirname(fileURLToPath(import.meta.url));
+const packageRoot = resolve(sourceDirectory, '../..');
+const outputPath = resolve(packageRoot, 'lib/client.js');
+const loaderId = process.env.DSH_IM_CLIENT_ID ?? '@xmanrui/dsh-im';
+
+const result = await build({
+  entryPoints: [resolve(sourceDirectory, 'index.js')],
+  bundle: true,
+  format: 'cjs',
+  platform: 'browser',
+  target: ['chrome100'],
+  external: ['react'],
+  write: false,
+  minify: process.env.NODE_ENV === 'production',
+  legalComments: 'none',
+});
+const bundled = result.outputFiles?.[0]?.text;
+if (!bundled) throw new Error('esbuild did not produce a client bundle');
+
+const wrapped = `window.__ModuleLoader__.load({
+  id: ${JSON.stringify(loaderId)},
+  factory: (require) => {
+    var module = { exports: {} };
+    var exports = module.exports;
+${bundled}
+    return module.exports;
+  }
+});
+`;
+await mkdir(dirname(outputPath), { recursive: true });
+await writeFile(outputPath, wrapped, 'utf8');
+console.log(`Wrote ${outputPath}`);