fix: clear stale BTC data from portfolio and canvas when switching to USD/XAU

static/script.js

@@ -39,6 +39,24 @@ function switchAsset(asset, btnEl) {
     addLog('SYS', `Ativo alterado para ${ASSET_LABELS[asset]} (${ASSET_PAIRS[asset]})`);
 }
 
+function clearAssetData() {
+    // Clear portfolio stale BTC data
+    const pfTrades = document.getElementById('portfolioTrades');
+    if (pfTrades) pfTrades.innerHTML = `<div style="color:var(--text-secondary);font-size:0.8rem;padding:8px">Carregando ${ASSET_LABELS[currentAsset]}...</div>`;
+    // Clear portfolio header values
+    const pfPnl = document.getElementById('pfPnl');
+    if (pfPnl) { pfPnl.textContent = 'P&L: —'; pfPnl.style.color = 'var(--text-secondary)'; }
+    const pfTrades2 = document.getElementById('pfTrades');
+    if (pfTrades2) pfTrades2.textContent = '—';
+    const pfTotal = document.getElementById('pfTotal');
+    if (pfTotal) pfTotal.textContent = ASSET_PAIRS[currentAsset];
+    const pfDays = document.getElementById('pfDays');
+    if (pfDays) pfDays.textContent = ASSET_LABELS[currentAsset];
+    // Clear multi-strat canvas
+    const canvas = document.getElementById('multiStratCanvas');
+    if (canvas) { const ctx = canvas.getContext('2d'); ctx.clearRect(0, 0, canvas.width, canvas.height); }
+}
+
 function updatePipelineHeader() {
     const h2 = document.querySelector('.pipeline-section h2');
     if (h2) {
@@ -67,6 +85,9 @@ function loadAssetBrief() {
         return;
     }
 
+    // Clear stale BTC data from portfolio/timeline when switching to USD/XAU
+    clearAssetData();
+
     const apiMap = { usd: '/api/usd/brief', xau: '/api/xau/brief' };
     const api = apiMap[currentAsset];
     if (!api) return;