feat: finalize app.py integrity guard and retrieval logic

app.py

@@ -10,14 +10,25 @@ app = Flask(__name__)
 @app.before_request
 def guard():
     if not verify_vault():
-        return jsonify({"error": "Integrity violation"}), 403
+        return jsonify({"error": "Integrity violation: Knowledge vault tampered."}), 403
 
 retriever = LocalRetrievalEngine()
 
 @app.route('/ripple', methods=['POST'])
 def ripple():
-    data = request.get_json(force=True)
-    return jsonify(get_ripple_payload(data.get("text", "")))
+    data = request.get_json(force=True) or {}
+    text = data.get("text", "").strip()
+    if not text: return jsonify({"error": "Null parameters"}), 400
+    try:
+        return jsonify(get_ripple_payload(text))
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+@app.route('/', methods=['GET'])
+def index():
+    template_path = os.path.join(os.getcwd(), "templates", "ripple.html")
+    with open(template_path, 'r', encoding='utf-8') as f:
+        return render_template_string(f.read())
 
 if __name__ == '__main__':
     app.run(host='0.0.0.0', port=5000)