feat: 所有参数移至config.json, 重构退出逻辑, 清理遗留接口

- 将所有硬编码参数迁移到 config.json (手续费率、止盈/止损阈值、
  超时、腿间隔、加仓步进等)
- 退出条件: 净利 >= take_profit_pct 止盈, 价差 <= 0 平仓
- 删除 Binance/dYdX 遗留代码
- 更新 README 文档
- Dashboard: 双交易所价格表、黑名单UI、按币名排序持仓
- Bitget WS: 文本ping保活
- 数据库: 重置, 无历史仓位

web/static/app.js

@@ -38,8 +38,8 @@ function updateClock() {
 setInterval(updateClock, 1000);
 updateClock();
 
-const EXCHANGES = ['Binance', 'HyperLiquid', 'Bitget', 'dYdX'];
-const COINS = ['DOGE', 'LINK', 'ONDO', 'OP', 'WIF', 'ARB'];
+const EXCHANGES = ['HyperLiquid', 'Bitget'];
+const COINS = []; // populated dynamically from SSE data
 
 function formatPrice(p) {
   if (p == null || p <= 0) return '-';
@@ -97,6 +97,13 @@ const eventHandlers = {};
 eventHandlers.prices = (prices) => {
   if (!prices || prices.length === 0) return;
 
+  // Dynamically populate COINS list on first data
+  if (COINS.length === 0) {
+    for (const row of prices) {
+      COINS.push(row.coin);
+    }
+  }
+
   let html = '';
   let coinsOnline = 0;
 
@@ -110,7 +117,6 @@ eventHandlers.prices = (prices) => {
 
     const cells = EXCHANGES.map(ex => {
       const p = row[ex];
-      const sp = row[ex + '_spread'];
       const key = coin + '.' + ex;
       const prev = priceCache[key];
       const curP = p || 0;
@@ -131,9 +137,6 @@ eventHandlers.prices = (prices) => {
       }
 
       let display = formatPrice(p);
-      if (sp && sp > 0.01) {
-        display += `<span class="text-dim" style="font-size:10px"> (${sp.toFixed(3)}%)</span>`;
-      }
       return `<td class="${cls}">${display}</td>`;
     });
 
@@ -171,14 +174,17 @@ eventHandlers.arb = (opps) => {
   els.arbBody.innerHTML = html;
 };
 
-// P3-3: Positions with live PnL
+// P3-3: Positions with live PnL — sorted by time (oldest first)
 eventHandlers.positions = (positions) => {
   if (!positions || positions.length === 0) {
     els.posBody.innerHTML = '<tr><td colspan="8" class="text-dim">无持仓</td></tr>';
     return;
   }
 
-  const html = positions.map(p => {
+  // Sort by coin name (stable, deterministic)
+  const sorted = [...positions].sort((a, b) => a.coin.localeCompare(b.coin));
+
+  const html = sorted.map(p => {
     const pnl = p.pnl_est;
     const pnlStr = pnl != null ? pnl.toFixed(4) + '%' : '-';
     const curSpread = p.current_spread != null ? p.current_spread.toFixed(4) + '%' : '-';
@@ -209,8 +215,12 @@ eventHandlers.stats = (stats) => {
   // Detailed PnL stats
   if (stats.detail) {
     const d = stats.detail;
-    $('stat-total-pnl').textContent = (d.total_pnl != null) ? d.total_pnl.toFixed(2) + '%' : '—';
-    $('stat-avg-pnl').textContent  = (d.avg_pnl != null)   ? d.avg_pnl.toFixed(2) + '%' : '—';
+    // Total PnL: show both USD and percentage of capital
+    const usdStr = (d.total_pnl_usd != null) ? '$' + d.total_pnl_usd.toFixed(2) : '—';
+    const pctStr = (d.capital_pnl != null) ? d.capital_pnl.toFixed(4) + '%' : '—';
+    $('stat-total-pnl').textContent = usdStr + ' (' + pctStr + ')';
+    $('stat-total-pnl').className = pnlClass(d.capital_pnl);
+    $('stat-capital').textContent   = (stats.capital != null) ? '$' + stats.capital.toFixed(0) : '—';
     $('stat-win-rate').textContent = (d.win_rate != null)  ? d.win_rate.toFixed(1) + '%' : '—';
     $('stat-max-profit').textContent = (d.max_profit != null) ? '+' + d.max_profit.toFixed(2) + '%' : '—';
     $('stat-max-loss').textContent = (d.max_loss != null)  ? d.max_loss.toFixed(2) + '%' : '—';
@@ -225,6 +235,18 @@ eventHandlers.stats = (stats) => {
     }).join(' ');
     els.connDetail.innerHTML = dots;
   }
+
+  // Blacklist — stale spread coins
+  if (stats.blacklist && stats.blacklist.length > 0) {
+    const html = stats.blacklist.map(b => {
+      const minLeft = Math.floor(b.remaining_sec / 60);
+      const secLeft = b.remaining_sec % 60;
+      return `<span style="color:#f85149;margin-right:12px;font-size:13px">⛔ ${b.coin} (${b.since} 剩余 ${minLeft}:${secLeft.toString().padStart(2,'0')})</span>`;
+    }).join('');
+    $('bl-body').innerHTML = html;
+  } else {
+    $('bl-body').innerHTML = '<span class="text-dim">暂无</span>';
+  }
 };
 
 // P3-4: Real-time trade events