fix chain summary count: include costless user msgs, exclude invisible no-cost entries

wwwroot/app.js

@@ -572,14 +572,17 @@ async function openModal(dataStr, clickedId, chainId) {
     const chain = await api(`/api/entry-chain/${encodeURIComponent(entryId)}`);
 
     // Calculate chain total
-    const chainCosts = chain.map(entry => {
+    let chainTotal = 0, chainCount = 0, visibleCount = 0;
+    chain.forEach(entry => {
       try {
         const d = JSON.parse(entry.data);
-        return d.message?.usage?.cost?.total || 0;
-      } catch { return 0; }
+        const msg = d.message;
+        const cost = msg?.usage?.cost?.total || 0;
+        if ((msg && extractContent(msg).trim()) || cost > 0) visibleCount++;
+        chainTotal += cost;
+        if (cost > 0) chainCount++;
+      } catch {}
     });
-    const chainTotal = chainCosts.reduce((a, b) => a + b, 0);
-    const chainCount = chainCosts.filter(c => c > 0).length;
 
     // Fill raw JSON if not set (e.g. opened from chain block)
     if (!dataStr) {
@@ -588,7 +591,7 @@ async function openModal(dataStr, clickedId, chainId) {
 
     let html = `<div class="chain-summary">
       <span class="chain-summary-cost">Kette: ${pct(chainTotal)}</span>
-      <span class="chain-summary-count">${chainCount} Einträge mit Kosten / ${chain.length} gesamt</span>
+      <span class="chain-summary-count">${chainCount} mit Kosten / ${visibleCount} gesamt</span>
     </div>`;
 
     html += chain.map(entry => {