app.py

from flask import Flask, render_template, request, Response

app = Flask(__name__)

@app.route("/")
def index():
    return render_template("index.html")

@app.route("/preview", methods=["POST"])
def preview():
    """Serve generated HTML inside a sandboxed iframe."""
    html = request.json.get("html", "")
    if not html.strip():
        html = "<p style='color:#888;padding:2rem'>Nothing generated yet.</p>"
    return Response(html, mimetype="text/html")

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=7860, debug=True)