修复：FSSI 刷新期间协调射频路径与 IQ 采集

src/atsc_app/task/iq_rx.c

@@ -370,6 +370,7 @@ static void *iq_spec_thr(void *arg)
         }
 
         /* a full window is 26.21 ms = 1.08 ATSC fields; print only a short burst every 30s */
+#if IQ_ANALYSIS_UART_DEBUG
         {
             static time_t log_burst_start = 0;
             static int log_burst_count = 0;
@@ -386,6 +387,7 @@ static void *iq_spec_thr(void *arg)
                 log_burst_count++;
             }
         }
+#endif
         if (npkt == IQ_NPKT && ++nraw >= IQ_RAW_EVERY) {
             FILE *r = fopen("/tmp/iq_raw.bin", "wb");   /* whole contiguous window, for PC-side analysis */
             if (r) { fwrite(iq_win[buf], 1, IQ_WBYTES, r); fclose(r); }