ci: add production smoke test workflow (manual + daily cron)

- New workflow `production Smoke` with workflow_dispatch + daily schedule
  (05:00 UTC). Does NOT run on push/PR.
- Runs smoke-http, guest-onboarding, home-shell, and unauthenticated
  store tests against music-room.huiwings.cn.
- Includes optional SSH health check (if PROD_SSH_* secrets configured).
- Also makes smoke-http testOrgId configurable via PROD_ORG_ID env var
  for cross-environment use (moicen vs huiwings).
- Adds production-remote-check.sh script.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

scripts/production-remote-check.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# 正式服只读健康检查
+# 由 GitHub Actions（playwright-production.yml）通过 SSH 调用
+
+set -euo pipefail
+
+echo "=== htykc ==="
+if ps aux | grep -q '[h]tykc'; then
+    echo "htykc: RUNNING"
+    ps aux | grep '[h]tykc' | awk '{print $2, $8, $11}'
+else
+    echo "htykc: NOT RUNNING"
+    exit 1
+fi
+
+echo ""
+echo "=== htyproc ==="
+if ps aux | grep -q '[h]typroc'; then
+    echo "htyproc: RUNNING"
+else
+    echo "htyproc: NOT RUNNING (optional)"
+fi
+
+echo ""
+echo "=== nginx ==="
+nginx -t 2>&1 || sudo nginx -t 2>&1
+
+echo ""
+echo "=== disk ==="
+df -h / | tail -1
+
+echo ""
+echo "=== load ==="
+uptime
+
+echo ""
+echo "=== memory ==="
+free -h | grep -v Swap
+
+echo ""
+echo "=== ALL CHECKS PASSED ==="