fix(build): restore build step in pre-push hook using direct node calls

The previous fix removed the build step because pnpm run deadlocks in
submodule context. Direct node invocations (node .../bin/tsx, node
.../bin/tsc) avoid the deadlock. Full gates restored: lint, typecheck,
frontend build, CLI shebang, integration test.

Author: Mearman

.husky/pre-push

@@ -1 +1 @@
-node node_modules/.bin/eslint . 2>&1 && node node_modules/.bin/tsc --noEmit 2>&1 && node --test dist/test/coordinator-socket-error.integration.test.js 2>&1
+node node_modules/.bin/eslint . 2>&1 && node node_modules/.bin/tsc --noEmit 2>&1 && node node_modules/.bin/tsx src/bridges/user/web/build.ts 2>&1 && printf '#!/usr/bin/env node\n' | cat - dist/cli.js > dist/cli.tmp && mv dist/cli.tmp dist/cli.js && node --test dist/test/coordinator-socket-error.integration.test.js 2>&1