feat: add multi-asset sidebar (BTC, USD, XAU) with asset switching

- Added sidebar navigation with 3 tabs: Bitcoin, Dólar, Ouro
- Added switchAsset() function to switch between assets
- Updated CSS with sidebar layout (fixed 200px sidebar)
- Updated script.js with asset state management
- Sync sidebar clock and status with main header
- BTC remains default active tab

static/script.js

@@ -7,13 +7,44 @@
 let autoMode = false;
 let autoInterval = null;
 let pollInterval = null;
+let currentAsset = 'btc';  // 'btc', 'usd', 'xau'
 const AGENT_EMOJIS = { brief: "📊", decio: "🎯", papert: "⚡", audit: "🔍" };
 const AGENT_COLORS = { brief: "#4fc3f7", decio: "#ffd54f", papert: "#69f0ae", audit: "#b388ff" };
 
+// ── Asset Switching ───────────────────────────────────────────────────────────
+const ASSET_SYMBOLS = { btc: '₿', usd: '💵', xau: '🪙' };
+const ASSET_LABELS = { btc: 'Bitcoin', usd: 'Dólar', xau: 'Ouro' };
+const ASSET_PAIRS = { btc: 'BTC/USD', usd: 'USD/BRL', xau: 'XAU/USD' };
+
+function switchAsset(asset, btnEl) {
+    if (asset === currentAsset) return;
+    currentAsset = asset;
+
+    // Update sidebar buttons
+    document.querySelectorAll('.sidebar-btn').forEach(b => b.classList.remove('active'));
+    if (btnEl) btnEl.classList.add('active');
+
+    // Update header title dynamically
+    const titleEl = document.querySelector('.logo-text strong');
+    if (titleEl) titleEl.textContent = asset.toUpperCase();
+
+    // Reload data for new asset
+    loadConfig();
+    loadPortfolio();
+    loadMultiStratChart('live');
+    addLog('SYS', `Ativo alterado para ${ASSET_LABELS[asset]} (${ASSET_PAIRS[asset]})`);
+}
+
 // ── Init ─────────────────────────────────────────────────────────────────────
 document.addEventListener('DOMContentLoaded', () => {
     updateClock();
     setInterval(updateClock, 1000);
+    // Sidebar clock
+    setInterval(() => {
+        const now = new Date();
+        const el = document.getElementById('sidebarClock');
+        if (el) el.textContent = now.toLocaleTimeString('pt-BR', { hour: '2-digit', minute: '2-digit' });
+    }, 1000);
     startPolling();
     loadAgentRegistry();
     loadMetrics();
@@ -75,6 +106,11 @@ function updateStatus(text, type) {
     const txt = document.getElementById('statusText');
     if (dot) dot.className = `status-dot ${type}`;
     if (txt) txt.textContent = text;
+    // Sync sidebar status
+    const sidebarDot = document.getElementById('sidebarStatusDot');
+    const sidebarTxt = document.getElementById('sidebarStatusText');
+    if (sidebarDot) sidebarDot.className = `status-dot ${type}`;
+    if (sidebarTxt) sidebarTxt.textContent = text;
 }
 
 // ── Pipeline ─────────────────────────────────────────────────────────────────

static/style.css

@@ -15,27 +15,104 @@
     --shadow: 0 8px 32px rgba(0,0,0,0.4);
 }
 
-/* ── Reset & Base ───────────────────────────────────────── */
+/* ── Reset & Base ───────────────────────────────────── */
 * { margin: 0; padding: 0; box-sizing: border-box; }
+
+/* ── Sidebar Layout ──────────────────────────────────── */
 body {
+    display: flex;
+    min-height: 100vh;
     font-family: 'Exo 2', 'Noto Sans JP', sans-serif;
     background: var(--bg-dark);
     color: var(--text-primary);
-    min-height: 100vh;
     overflow-x: hidden;
 }
 
-/* ── Dashboard Layout ───────────────────────────────────── */
+/* ── Sidebar ─────────────────────────────────────────── */
-.dashboard {
+.sidebar {
+    width: 200px;
+    min-height: 100vh;
+    background: var(--bg-card);
+    border-right: 1px solid rgba(79,195,247,0.1);
+    display: flex;
+    flex-direction: column;
+    padding: 20px 0;
+    position: fixed;
+    left: 0;
+    top: 0;
+    bottom: 0;
+    z-index: 100;
+}
+.sidebar-logo {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 0 16px 20px;
+    border-bottom: 1px solid rgba(255,255,255,0.05);
+    margin-bottom: 20px;
+}
+.sidebar-logo-icon { font-size: 1.8rem; }
+.sidebar-logo-text { font-size: 0.9rem; line-height: 1.2; color: var(--text-primary); }
+.sidebar-logo-text strong { color: var(--accent-blue); }
+
+.sidebar-nav {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+    padding: 0 10px;
+    flex: 1;
+}
+.sidebar-btn {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 2px;
+    padding: 14px 8px;
+    border: none;
+    border-radius: 12px;
+    background: transparent;
+    color: var(--text-secondary);
+    cursor: pointer;
+    transition: all 0.2s;
+    text-align: center;
+}
+.sidebar-btn:hover {
+    background: var(--bg-card-hover);
+    color: var(--text-primary);
+}
+.sidebar-btn.active {
+    background: rgba(79,195,247,0.1);
+    color: var(--accent-blue);
+    border: 1px solid rgba(79,195,247,0.2);
+}
+.sidebar-icon { font-size: 1.6rem; }
+.sidebar-label { font-size: 0.8rem; font-weight: 600; }
+.sidebar-pair { font-size: 0.65rem; opacity: 0.6; }
+
+.sidebar-footer {
+    padding: 16px;
+    border-top: 1px solid rgba(255,255,255,0.05);
+    text-align: center;
+}
+.sidebar-clock { font-size: 1.1rem; color: var(--accent-blue); margin-bottom: 8px; }
+.sidebar-status { display: flex; align-items: center; justify-content: center; gap: 6px; font-size: 0.75rem; color: var(--text-secondary); }
+
+/* ── Main Content ────────────────────────────────────── */
+.main-content {
+    margin-left: 200px;
+    flex: 1;
+    padding: 20px;
+    max-width: calc(100vw - 200px);
+}
+.main-content .dashboard {
     max-width: 1400px;
     margin: 0 auto;
-    padding: 20px;
     display: flex;
     flex-direction: column;
     gap: 24px;
 }
 
-/* ── Header ──────────────────────────────────────────────── */
+/* ── Header ──────────────────────────────────────────── */
 .header {
     display: flex;
     align-items: center;

templates/index.html

@@ -8,7 +8,40 @@
     <link href="https://fonts.googleapis.com/css2?family=Exo+2:wght@400;600;700&family=Noto+Sans+JP:wght@400;500;700&display=swap" rel="stylesheet">
 </head>
 <body>
-    <div class="dashboard">
+    <!-- Sidebar -->
+    <nav class="sidebar" id="sidebar">
+        <div class="sidebar-logo">
+            <span class="sidebar-logo-icon">🏢</span>
+            <div class="sidebar-logo-text">BrainSteel<br><strong>Fin</strong></div>
+        </div>
+        <div class="sidebar-nav">
+            <button class="sidebar-btn active" onclick="switchAsset('btc', this)" data-asset="btc">
+                <span class="sidebar-icon">₿</span>
+                <span class="sidebar-label">Bitcoin</span>
+                <span class="sidebar-pair">BTC/USD</span>
+            </button>
+            <button class="sidebar-btn" onclick="switchAsset('usd', this)" data-asset="usd">
+                <span class="sidebar-icon">💵</span>
+                <span class="sidebar-label">Dólar</span>
+                <span class="sidebar-pair">USD/BRL</span>
+            </button>
+            <button class="sidebar-btn" onclick="switchAsset('xau', this)" data-asset="xau">
+                <span class="sidebar-icon">🪙</span>
+                <span class="sidebar-label">Ouro</span>
+                <span class="sidebar-pair">XAU/USD</span>
+            </button>
+        </div>
+        <div class="sidebar-footer">
+            <div class="sidebar-clock" id="sidebarClock"></div>
+            <div class="sidebar-status">
+                <span class="status-dot" id="sidebarStatusDot"></span>
+                <span id="sidebarStatusText">Online</span>
+            </div>
+        </div>
+    </nav>
+
+    <!-- Main Content -->
+    <div class="main-content" id="mainContent">
         <!-- Header -->
         <header class="header">
             <div class="logo">