From af45e65ad726f1813e54b05756255499bff8ba12 Mon Sep 17 00:00:00 2001
From: Go1c <1c@live.cn>
Date: Tue, 14 Apr 2026 16:57:37 +0800
Subject: [PATCH] fix: enable WebSocket ping heartbeat to detect dead
 connections
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heartbeat_interval was defined in config (default 30s) but never
used — ping_interval/ping_timeout were both None, so silently dead
connections were never detected and the receive loop hung indefinitely.

Now passes heartbeat_interval to websockets ping_interval and
ping_timeout. A missed pong raises ConnectionClosed, exits _listen(),
and triggers the reconnect loop which re-syncs any missed events.
---
 fns_cli/client.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fns_cli/client.py b/fns_cli/client.py
index 47395fb..ac39a9b 100644
--- a/fns_cli/client.py
+++ b/fns_cli/client.py
@@ -121,11 +121,12 @@ async def _connect(self) -> None:
         )
         log.info("Connecting to %s", url)
 
+        interval = self.config.client.heartbeat_interval
         self.ws = await websockets.connect(
             url,
             max_size=128 * 1024 * 1024,
-            ping_interval=None,
-            ping_timeout=None,
+            ping_interval=interval,
+            ping_timeout=interval,
             close_timeout=10,
         )
         log.info("WebSocket connected, sending auth")