feat(desktop): conductor token stats summary row in token page

- conductor.py: install cost_tracker + expose /token-stats endpoint (5 lines)
- app.js: fetch conductor token totals and display as a single summary row at top of token table (not expandable, with tooltip noting it's excluded from cumulative totals)
- styles.css: conductor row styling

frontends/conductor.py

@@ -343,8 +343,14 @@ def conductor_loop():
 async def on_startup():
     global main_loop
     main_loop = asyncio.get_running_loop()
+    import cost_tracker; cost_tracker.install()
     threading.Thread(target=conductor_loop, name="conductor-loop", daemon=True).start()
 
+@app.get("/token-stats")
+def conductor_token_stats():
+    import cost_tracker
+    return {"records": [{"thread": k, "input": v.input, "output": v.output, "cacheCreate": v.cache_create, "cacheRead": v.cache_read} for k, v in cost_tracker.all_trackers().items()]}
+
 @app.get("/")
 def index():
     return FileResponse(HTML_PATH)

frontends/desktop/static/app.js

@@ -2953,7 +2953,30 @@ function tokRenderTable(records) {
   if(tokPager){tokPager.innerHTML='';if(totalPages>1)for(let i=0;i<totalPages;i++){const b=document.createElement('button');b.textContent=i+1;if(i===_tokPage)b.className='active';b.addEventListener('click',()=>{_tokPage=i;tokRenderTable(records);});tokPager.appendChild(b);}}
 }
 
-async function loadTokenPage(){await tokPollBridge();const f=tokGetFiltered();const all=tokLoadHistory();tokRenderStats(f,all);tokRenderTable(f);}
+async function loadTokenPage(){await tokPollBridge();const f=tokGetFiltered();const all=tokLoadHistory();tokRenderStats(f,all);tokRenderTable(f);await tokRenderConductorRow();}
+
+let _conductorRowGen = 0;
+async function tokRenderConductorRow() {
+  if (!tokTbody) return;
+  const gen = ++_conductorRowGen;
+  tokTbody.querySelectorAll('.tok-row-conductor').forEach(el => el.remove());
+  try {
+    const data = await (await fetch(`http://${location.hostname}:8900/token-stats`)).json();
+    if (gen !== _conductorRowGen) return;
+    tokTbody.querySelectorAll('.tok-row-conductor').forEach(el => el.remove());
+    const recs = (data.records || []).filter(r => r.thread === 'conductor-agent' || r.thread.startsWith('subagent-'));
+    if (!recs.length) return;
+    let totalIn = 0, totalOut = 0, totalCc = 0, totalCr = 0, cost = 0;
+    for (const r of recs) {
+      totalIn += r.input || 0; totalOut += r.output || 0; totalCc += r.cacheCreate || 0; totalCr += r.cacheRead || 0;
+      cost += parseFloat(estCost(r.input || 0, r.output || 0, r.model || '', r.cacheRead || 0, r.cacheCreate || 0));
+    }
+    const tr = document.createElement('tr'); tr.className = 'tok-row-session tok-row-conductor';
+    tr.title = 'Conductor 消耗的 token 不计入累计 token 中';
+    tr.innerHTML = `<td>🎛 Conductor (${recs.length} threads)</td><td>${fmtTok(totalIn)}</td><td>${fmtTok(totalOut)}</td><td>${fmtTok(totalCc)}</td><td>${fmtTok(totalCr)}</td><td>¥${cost.toFixed(2)}</td>`;
+    tokTbody.insertBefore(tr, tokTbody.firstChild);
+  } catch (_) {}
+}
 
 /* ─── Conductor token tab (disabled — pending time tracking) ─── */
 /*

frontends/desktop/static/styles.css

@@ -844,6 +844,9 @@ span.flatpickr-weekday{ color:var(--muted) !important; font-size:11px; }
 .tok-row-session:hover td{ background:var(--hover-dim); }
 .tok-row-session td:first-child::before{ content:'▶'; margin-right:6px; font-size:10px; color:var(--muted2); transition:transform .15s; display:inline-block; }
 .tok-row-session.open td:first-child::before{ transform:rotate(90deg); }
+.tok-row-conductor{ cursor:default; background:var(--blue-soft); }
+.tok-row-conductor td:first-child::before{ content:''; margin:0; }
+.tok-row-conductor:hover td{ background:var(--blue-soft); }
 .tok-detail td{ padding:5px 12px 5px 32px; font-size:11px; color:var(--muted); border-bottom:1px solid var(--line-soft); background:var(--field-bg); }
 .tok-detail td:not(:first-child){ text-align:right; }
 .tok-detail[hidden]{ display:none; }