From 53f54af871be2169500503bf55f4d9b3b8dcbe10 Mon Sep 17 00:00:00 2001
From: Smittix <jamessmith1@outlook.com>
Date: Tue, 24 Feb 2026 21:02:03 +0000
Subject: [PATCH] Fix Python 3.9 startup crash in waterfall websocket

---
 routes/waterfall_websocket.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/routes/waterfall_websocket.py b/routes/waterfall_websocket.py
index 15d14c9..260c044 100644
--- a/routes/waterfall_websocket.py
+++ b/routes/waterfall_websocket.py
@@ -1,5 +1,7 @@
 """WebSocket-based waterfall streaming with I/Q capture and server-side FFT."""
 
+from __future__ import annotations
+
 import json
 import queue
 import socket