feat(ui): modern theme, dark/light toggle, polished templates

app.py

@@ -0,0 +1,7 @@
+from app import create_app
+
+app = create_app()
+
+if __name__ == "__main__":
+    import os
+    app.run(host="0.0.0.0", port=int(os.environ.get("PORT", 5000)), debug=True)