fix ui

rfg_adc_plotter/state/ring_buffer.py

@@ -7,7 +7,7 @@ from typing import Optional
 
 import numpy as np
 
-from rfg_adc_plotter.constants import FFT_LEN, SWEEP_FREQ_MAX_GHZ, SWEEP_FREQ_MIN_GHZ, WF_WIDTH
+from rfg_adc_plotter.constants import FFT_LEN, SWEEP_FREQ_MAX_GHZ, SWEEP_FREQ_MIN_GHZ
 from rfg_adc_plotter.processing.fft import compute_distance_axis, compute_fft_mag_row, fft_mag_to_db
 
 
@@ -93,7 +93,7 @@ class RingBuffer:
 
     def ensure_init(self, sweep_width: int) -> bool:
         """Allocate or resize buffers. Returns True when geometry changed."""
-        target_width = max(int(sweep_width), int(WF_WIDTH))
+        target_width = max(1, int(sweep_width))
         changed = False
         if self.ring is None or self.ring_time is None or self.ring_fft is None:
             self.width = target_width