fix(build): publish web frontend assets so the CLI doesn't crash on launch

package.json

@@ -48,7 +48,7 @@
   "scripts": {
     "prepare": "husky",
     "build:frontend": "tsx src/bridges/user/web/build.ts",
-    "build": "pnpm build:frontend && tsc && printf '#!/usr/bin/env node\n' | cat - dist/cli.js > dist/cli.tmp && mv dist/cli.tmp dist/cli.js",
+    "build": "pnpm build:frontend && tsc && tsx scripts/copy-web-assets.ts && printf '#!/usr/bin/env node\n' | cat - dist/cli.js > dist/cli.tmp && mv dist/cli.tmp dist/cli.js",
     "generate:server-json": "tsx scripts/sync-release-metadata.ts",
     "publish:mcp-registry": "tsx scripts/publish-mcp-registry.ts",
     "lint": "eslint .",

scripts/copy-web-assets.ts

@@ -0,0 +1,35 @@
+/**
+ * Copy the built web frontend assets into the compiled output tree.
+ *
+ * `build:frontend` (esbuild) emits the bundles into
+ * `src/bridges/user/web/dist/`, and `index.html` lives alongside the frontend
+ * sources. `tsc` only emits JS/d.ts from `.ts` inputs, so these non-TS assets
+ * are never copied into the top-level `dist/`. Without this step the published
+ * package is missing `frontend/index.html`, `dist/bundle.js`, `dist/sw.js`,
+ * `dist/manifest.json` and `dist/icons/*`, and the web server crashes with
+ * ENOENT at module load — taking down every command, including setup. See #18.
+ *
+ * Usage: node/tsx scripts/copy-web-assets.ts (run after `tsc`)
+ */
+
+import * as fs from "node:fs";
+import * as path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+const webSrc = path.join(root, "src", "bridges", "user", "web");
+const webOut = path.join(root, "dist", "bridges", "user", "web");
+
+// Frontend shell (loaded by the server as INDEX_HTML). cpSync creates the
+// destination parent dir itself.
+fs.cpSync(
+  path.join(webSrc, "frontend", "index.html"),
+  path.join(webOut, "frontend", "index.html"),
+);
+
+// esbuild bundles + web app manifest + PWA icons.
+fs.cpSync(path.join(webSrc, "dist"), path.join(webOut, "dist"), {
+  recursive: true,
+});
+
+console.log(`Copied web assets to ${webOut}`);

src/bridges/user/web/build.ts

@@ -44,6 +44,10 @@ const inlineCssPlugin: esbuild.Plugin = {
 };
 
 async function main(): Promise<void> {
+  // Start from a clean output dir so stale artifacts (e.g. renamed bundles,
+  // leftover sourcemaps) can't linger and get swept into the published
+  // package by the copy-web-assets step.
+  fs.rmSync(DIST_DIR, { recursive: true, force: true });
   fs.mkdirSync(DIST_DIR, { recursive: true });
 
   await esbuild.build({