Standardize MultiCapture ChannelEstimation headers and device details

- switch ChannelEstimation Min Avg Max visual to canonical device block device.mac_address and device.system_description
- remove legacy CODING_AGENTS device injection block from ChannelEstimation Min Avg Max visual
- remove sampled points wording from ChannelEstimation Min Avg Max and Echo Detection IFFT chart headers
- keep chart header labels concise with frequency or delay ranges only - 2026-03-03 08:05:37

Author: mgarcia01752

docs/visual-previews/MultiCapture/ChannelEstimation/Ofdm-ChannelEstimation-Analysis-Echo-Detection-IFFT.html

@@ -162,7 +162,7 @@ var template = `
 
 <div class="panel">
   <div class="panel-title">All Channels ({{channel_count}}) · IFFT Magnitude Aligned by Delay</div>
-  <div class="panel-info">Master Axis: {{combined.delay_start_us}} - {{combined.delay_end_us}} μs ({{combined.total_points}} points, showing {{combined.display_points}} sampled)</div>
+  <div class="panel-info">Master Axis: {{combined.delay_start_us}} - {{combined.delay_end_us}} μs</div>
   <canvas id="chart-all-aligned" class="chart-canvas" height="150"></canvas>
 </div>
 
@@ -260,7 +260,7 @@ var template = `
 
       var info = document.createElement('div');
       info.className = 'panel-info';
-      info.textContent = 'Delay Range: ' + ch.delay_start_us + ' - ' + ch.delay_end_us + ' μs (' + ch.total_points + ' points, showing ' + ch.display_points + ' sampled)';
+      info.textContent = 'Delay Range: ' + ch.delay_start_us + ' - ' + ch.delay_end_us + ' μs';
       panel.appendChild(info);
 
       var chips = document.createElement('div');