Prepare shop-ready deployment docs and fix transaction modal UI

scripts/start_prod.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Start the full production stack on this box.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+# 1. DB up (idempotent)
+docker compose up -d db
+
+# 2. Wait for DB to be healthy
+for i in $(seq 1 30); do
+  if docker exec crm_omt_db pg_isready -U postgres -d crm_omt >/dev/null 2>&1; then
+    break
+  fi
+  sleep 1
+done
+
+# 3. Build frontend (no-op if dist/ already current; safe to re-run)
+if [ ! -d dist ] || [ -n "$(find src -newer dist -type f -print -quit 2>/dev/null)" ]; then
+  echo "[prod] building frontend..."
+  npm run build
+fi
+
+# 4. Start API in production mode (foreground; use a process manager for restart)
+cd server
+node src/index.js