Fix OpenWrt hostapd client fetch

services/openwrt.py

@@ -282,14 +282,11 @@ async def get_openwrt_status(cfg: dict[str, Any]) -> str:
     ifnames = sorted({name for name in ifnames if name})
     if ifnames:
         for ifname in ifnames:
-            cmd_clients = ssh_cmd + [
-                "sh",
-                "-c",
-                f"ubus call hostapd.{ifname} get_clients 2>/dev/null || echo '{{}}'",
-            ]
+            cmd_clients = ssh_cmd + ["ubus", "call", f"hostapd.{ifname}", "get_clients"]
             rc2, out2 = await run_cmd_full(cmd_clients, timeout=timeout_sec + 15)
             if rc2 == 124:
-                return f"⚠️ OpenWrt SSH error (wifi clients {ifname}): timeout"
+                return f"?? OpenWrt SSH error (wifi clients {ifname}): timeout"
+            if rc2 == 0:
                 payload = _safe_json_load(out2)
                 if payload:
                     wifi_clients.extend(_parse_hostapd_clients(payload, ifname))