fix: add recording_mode option in html

sfm/sfm_webapp.html

@@ -803,6 +803,17 @@
     <div class="cfg-section">
       <div class="cfg-section-title">Recording</div>
 
+      <div class="cfg-field">
+        <label>Recording Mode</label>
+        <select id="cfg-recording-mode">
+          <option value="">— unchanged —</option>
+          <option value="0">Single Shot</option>
+          <option value="1">Continuous</option>
+          <option value="3">Histogram</option>
+          <option value="4">Histogram + Continuous</option>
+        </select>
+      </div>
+
       <div class="cfg-field">
         <label>Sample Rate</label>
         <select id="cfg-sample-rate">
@@ -1321,7 +1332,9 @@ function populateDeviceTab() {
 
   // Compliance table
   const cc = unitInfo.compliance_config || {};
+  const RECORDING_MODE_LABELS = {0: 'Single Shot', 1: 'Continuous', 3: 'Histogram', 4: 'Histogram + Continuous'};
   const complianceRows = [
+    ['Recording Mode',        cc.recording_mode != null ? (RECORDING_MODE_LABELS[cc.recording_mode] || `0x${cc.recording_mode.toString(16).padStart(2,'0')}`) : '—'],
     ['Sample Rate',           cc.sample_rate != null ? `${cc.sample_rate} sps` : '—'],
     ['Record Time',           cc.record_time != null ? `${cc.record_time.toFixed(2)} s` : '—'],
     ['Trigger Level (geo)',   cc.trigger_level_geo != null ? `${cc.trigger_level_geo.toFixed(4)} in/s` : '—'],
@@ -1357,6 +1370,7 @@ function renderTable(id, rows) {
 function populateConfigFromDeviceInfo() {
   if (!unitInfo) return;
   const cc = unitInfo.compliance_config || {};
+  if (cc.recording_mode != null) qs('cfg-recording-mode', String(cc.recording_mode));
   if (cc.sample_rate)        qs('cfg-sample-rate', String(cc.sample_rate));
   if (cc.record_time != null) qs('cfg-record-time', cc.record_time.toFixed(1));
   if (cc.trigger_level_geo != null) qs('cfg-trigger',  cc.trigger_level_geo.toFixed(4));
@@ -1399,6 +1413,8 @@ async function writeConfig() {
 
   // Build body — only include fields that have values
   const body = {};
+  const rm = qs('cfg-recording-mode').value;
+  if (rm !== '') body.recording_mode = parseInt(rm, 10);
   const sr = qs('cfg-sample-rate').value;
   if (sr) body.sample_rate = parseInt(sr, 10);
   const rt = qs('cfg-record-time').value;