add bettor count trend to public trend panel

static/predictions.html

@@ -581,16 +581,45 @@ function renderPublicTrend() {
     {chair: 'C', amount: c, pct: c/total*100},
   ].sort((x, y) => y.amount - x.amount);
 
-  el.innerHTML = renderTrendBars(ranked.slice(0, 2));
+  // Count unique bettors per chair
+  const bettorCount = {A: 0, B: 0, C: 0};
+  for (const rb of Object.values(roundBettors)) {
+    for (const ch of CHAIRS) if ((rb.chairs[ch] || 0) > 0) bettorCount[ch]++;
+  }
+  const totalBettors = Object.keys(roundBettors).length;
+  const bettorRanked = CHAIRS.map(c => ({chair: c, count: bettorCount[c], pct: totalBettors > 0 ? bettorCount[c] / totalBettors * 100 : 0}))
+    .sort((x, y) => y.count - x.count);
+
+  let bettorHtml = '';
+  if (totalBettors > 0) {
+    bettorHtml = `<div style="margin-top:10px;padding-top:8px;border-top:1px solid var(--border)">
+      <div style="font-size:10px;color:var(--text3);font-weight:600;text-transform:uppercase;margin-bottom:6px">Most Bettors On</div>` +
+      bettorRanked.filter(r => r.count > 0).map((r, i) => `
+        <div class="trend-row">
+          <span class="trend-chair" style="color:${CHAIR_COLORS[r.chair]};font-size:14px">${r.chair}</span>
+          <div class="trend-bar-bg">
+            <div class="trend-bar-fill chair-${r.chair}" style="width:${r.pct}%"></div>
+          </div>
+          <span class="trend-pct" style="color:${CHAIR_COLORS[r.chair]}">${r.count}</span>
+          <span class="trend-amt">${r.pct.toFixed(0)}%</span>
+        </div>`).join('') +
+      `<div style="font-size:10px;color:var(--text3);margin-top:4px">${totalBettors} total bettors</div></div>`;
+  }
+
+  el.innerHTML = renderTrendBars(ranked.slice(0, 2)) + bettorHtml;
 
   // Check if public favorite matches our prediction
   if (currentPrediction) {
     const pubFav = ranked[0].chair;
+    const mostBettors = bettorRanked[0].chair;
     if (pubFav === currentPrediction) {
       note.textContent = `Public agrees with model pick (${pubFav})`;
     } else {
       note.textContent = `Public favors ${pubFav}, model picks ${currentPrediction} \u2014 contrarian opportunity?`;
     }
+    if (mostBettors !== pubFav) {
+      note.textContent += ` \u00b7 Most people on ${mostBettors} but most money on ${pubFav}`;
+    }
   }
 }