feat(dashboard): trade attivi con data/ora ingresso + tempo in posizione

Nuove colonne 'Ingresso (UTC)' (entry_time) e 'In posizione' (durata dall'ingresso,
formattata m/h/g) con flag stantio. Sostituisce la colonna Eta (staleness) col
tempo di holding effettivo.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/live/dashboard.py

@@ -213,6 +213,14 @@ def build_state() -> dict:
             # SEMPRE prezzi REALI (entry reale di esecuzione vs mark reale USDC): il feed
             # di decisione SIM (testnet inverse) è dislocato e non va mostrato come prezzo.
             executed = st.get("real_in_position")
+            et = st.get("entry_time", "")
+            held = None
+            if et:
+                try:
+                    t0 = datetime.fromisoformat(et.replace("Z", "+00:00"))
+                    held = round((now - t0).total_seconds() / 60.0, 1)
+                except Exception:
+                    held = None
             row = {
                 "id": _short(wid), "family": _family_of(wid),
                 "dir": "LONG" if st.get("direction", 0) > 0 else "SHORT",
@@ -220,6 +228,7 @@ def build_state() -> dict:
                 "tp": st.get("tp", 0.0), "age_min": round(_age_min(sp), 1),
                 "stale": _age_min(sp) > 15, "pair": is_pair,
                 "real": bool(executed),
+                "entry_time": et, "held_min": held,
             }
             if is_pair:
                 a_, b_ = wid.split("__")[1].split("_")          # es. ETH_SOL
@@ -605,16 +614,21 @@ function renderDescs(d){const wrap=document.getElementById('descs');if(!wrap)ret
  wrap.append(box);}
 function renderActive(a){const wrap=document.getElementById('active');wrap.innerHTML='';
  if(!a.length){wrap.innerHTML='<div class=mut>nessuna posizione aperta</div>';return;}
- const t=E('table');t.innerHTML='<tr><th>Strategia</th><th>Lato</th><th>Entry reale</th><th>Mercato reale</th><th>PnL non realizz.</th><th>Barre</th><th>→TP%</th><th>Età</th></tr>';
+ const t=E('table');t.innerHTML='<tr><th>Strategia</th><th>Lato</th><th>Ingresso (UTC)</th><th>In posizione</th><th>Entry reale</th><th>Mercato reale</th><th>PnL non realizz.</th><th>Barre</th><th>→TP%</th></tr>';
  a.forEach(p=>{const tr=E('tr');
   const side=`<span class="pill ${p.dir=='LONG'?'long':'short'}">${p.dir}${p.pair?' ratio':''}</span>`;
   const ue=p.unreal_eur!=null?`<span class="${cls(p.unreal_eur)}">${eur(p.unreal_eur)}${p.unreal_pct!=null?' ('+p.unreal_pct+'%)':''}</span>`:'<span class=mut>—</span>';
   const mkt=p.pair?(p.mark!=null?`${p.mark} / ${p.mark_b}`:'—'):(p.mark||'—');
+  const ing=p.entry_time?p.entry_time.slice(5,16).replace('T',' '):'—';
+  const held=fmtDur(p.held_min);
   tr.innerHTML=`<td>${p.id}${p.real?'':' <span class=tag>sim</span>'}${p.pair?' <span class=tag>'+p.leg_a+'/'+p.leg_b+'</span>':''}</td><td>${side}</td>
+   <td class=mut>${ing}</td><td class="${p.stale?'stale':''}">${held}${p.stale?' ⚠':''}</td>
    <td>${p.entry}</td><td>${mkt}</td><td>${ue}</td>
-   <td>${p.bars}/${p.max_bars||'∞'}</td><td class=mut>${p.to_tp_pct!=null?p.to_tp_pct:'—'}</td>
+   <td>${p.bars}/${p.max_bars||'∞'}</td><td class=mut>${p.to_tp_pct!=null?p.to_tp_pct:'—'}</td>`;
-   <td class="${p.stale?'stale':'mut'}">${p.age_min}m${p.stale?' ⚠':''}</td>`;
   t.append(tr);});wrap.append(t);}
+function fmtDur(m){if(m==null)return '—';m=Math.round(m);if(m<60)return m+'m';
+ const h=Math.floor(m/60),mm=m%60;if(h<24)return h+'h '+mm+'m';
+ const d=Math.floor(h/24);return d+'g '+(h%24)+'h';}
 function renderClosed(c){const wrap=document.getElementById('closed');wrap.innerHTML='';
  if(!c.length){wrap.innerHTML='<div class=mut>nessun trade chiuso</div>';return;}
  const t=E('table');t.innerHTML='<tr><th>Ora (UTC)</th><th>Strategia</th><th>Motivo</th><th>PnL</th><th>sim</th><th>esito</th></tr>';