diff --git a/backend/api/routes/account.py b/backend/api/routes/account.py
index ccde550..b90ae38 100644
--- a/backend/api/routes/account.py
+++ b/backend/api/routes/account.py
@@ -599,6 +599,55 @@ async def get_realtime_account(account_id: int = Depends(get_account_id)):
     return await get_realtime_account_data(account_id=account_id)
 
 
+async def fetch_live_positions_pnl(account_id: int):
+    """
+    获取指定账号的实时持仓盈亏（仅 mark_price / pnl / pnl_percent），供仪表板合并用。
+    失败时返回空列表，不抛异常。
+    """
+    client = None
+    try:
+        api_key, api_secret, use_testnet, status = Account.get_credentials(account_id)
+        if not api_key or not api_secret:
+            return []
+        try:
+            from binance_client import BinanceClient
+        except ImportError:
+            trading_system_path = project_root / 'trading_system'
+            sys.path.insert(0, str(trading_system_path))
+            from binance_client import BinanceClient
+        client = BinanceClient(api_key=api_key, api_secret=api_secret, testnet=use_testnet)
+        await client.connect()
+        positions = await client.get_open_positions()
+        result = []
+        for pos in positions:
+            amt = float(pos.get('positionAmt', 0))
+            if amt == 0:
+                continue
+            entry_price = float(pos.get('entryPrice', 0))
+            mark_price = float(pos.get('markPrice', 0)) or entry_price
+            unrealized_pnl = float(pos.get('unRealizedProfit', 0))
+            leverage = max(1, float(pos.get('leverage', 1)))
+            notional = abs(amt) * mark_price
+            margin = notional / leverage
+            pnl_percent = (unrealized_pnl / margin * 100) if margin > 0 else 0
+            result.append({
+                "symbol": pos.get("symbol"),
+                "mark_price": mark_price,
+                "pnl": unrealized_pnl,
+                "pnl_percent": pnl_percent,
+            })
+        return result
+    except Exception as e:
+        logger.debug(f"fetch_live_positions_pnl(account_id={account_id}) 失败: {e}")
+        return []
+    finally:
+        try:
+            if client is not None:
+                await client.disconnect()
+        except Exception:
+            pass
+
+
 @router.get("/positions")
 async def get_realtime_positions(account_id: int = Depends(get_account_id)):
     """获取实时持仓数据"""
diff --git a/backend/api/routes/admin.py b/backend/api/routes/admin.py
index 3bf8ac7..e0afcae 100644
--- a/backend/api/routes/admin.py
+++ b/backend/api/routes/admin.py
@@ -149,7 +149,13 @@ async def grant_user_account(user_id: int, account_id: int, payload: GrantReq, _
     a = Account.get(int(account_id))
     if not a:
         raise HTTPException(status_code=404, detail="账号不存在")
-    UserAccountMembership.add(int(user_id), int(account_id), role=payload.role)
+    try:
+        UserAccountMembership.add(int(user_id), int(account_id), role=payload.role)
+    except Exception as e:
+        raise HTTPException(
+            status_code=500,
+            detail=f"关联账号失败: {str(e)}",
+        )
     return {"success": True}
 
 
diff --git a/backend/api/routes/stats.py b/backend/api/routes/stats.py
index b71b787..9753534 100644
--- a/backend/api/routes/stats.py
+++ b/backend/api/routes/stats.py
@@ -171,11 +171,27 @@ async def get_dashboard_data(account_id: int = Depends(get_account_id)):
                 formatted_trade = {
                     **trade,
                     'entry_value_usdt': entry_value_usdt,
-                    'mark_price': trade.get('entry_price', 0),  # 数据库中没有标记价，使用入场价
+                    'mark_price': trade.get('entry_price', 0),  # 默认入场价，下面用实时数据覆盖
                     'pnl': pnl,
-                    'pnl_percent': pnl_percent  # 使用重新计算的收益率
+                    'pnl_percent': pnl_percent
                 }
                 open_trades.append(formatted_trade)
+            # 合并实时持仓盈亏（mark_price / pnl / pnl_percent），仪表板可显示浮盈浮亏
+            try:
+                from api.routes.account import fetch_live_positions_pnl
+                live_list = await fetch_live_positions_pnl(account_id)
+                by_symbol = {p["symbol"]: p for p in live_list}
+                for t in open_trades:
+                    sym = t.get("symbol")
+                    if sym and sym in by_symbol:
+                        lp = by_symbol[sym]
+                        t["mark_price"] = lp.get("mark_price", t.get("entry_price"))
+                        t["pnl"] = lp.get("pnl", 0)
+                        t["pnl_percent"] = lp.get("pnl_percent", 0)
+                if by_symbol:
+                    logger.info(f"已合并 {len(by_symbol)} 个实时持仓盈亏到仪表板")
+            except Exception as merge_err:
+                logger.debug(f"合并实时持仓盈亏失败（仪表板仍显示持仓，盈亏为 0）: {merge_err}")
             logger.info(f"使用数据库记录作为持仓数据: {len(open_trades)} 个持仓")
         except Exception as db_error:
             logger.error(f"从数据库获取持仓记录失败: {db_error}")
diff --git a/frontend/src/components/AdminDashboard.css b/frontend/src/components/AdminDashboard.css
index 74463b3..4eb34bf 100644
--- a/frontend/src/components/AdminDashboard.css
+++ b/frontend/src/components/AdminDashboard.css
@@ -136,6 +136,50 @@
   margin-bottom: 40px;
 }
 
+.users-section-grid {
+  display: grid;
+  grid-template-columns: 320px 1fr;
+  gap: 24px;
+  align-items: start;
+}
+
+@media (max-width: 900px) {
+  .users-section-grid {
+    grid-template-columns: 1fr;
+  }
+}
+
+.create-user-block {
+  background: white;
+  padding: 20px;
+  border-radius: 8px;
+  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+  border: 1px solid #e0e0e0;
+}
+
+.create-user-title {
+  margin: 0 0 6px 0;
+  font-size: 1.1rem;
+  color: #333;
+}
+
+.create-user-desc {
+  margin: 0 0 16px 0;
+  font-size: 13px;
+  color: #666;
+}
+
+.create-user-card {
+  height: auto;
+  box-shadow: none;
+  padding: 0;
+  border: none;
+}
+
+.create-user-card .create-user-card-heading {
+  display: none;
+}
+
 .user-group-card {
   background: white;
   border-radius: 8px;
diff --git a/frontend/src/components/AdminDashboard.jsx b/frontend/src/components/AdminDashboard.jsx
index fc8ba03..126c182 100644
--- a/frontend/src/components/AdminDashboard.jsx
+++ b/frontend/src/components/AdminDashboard.jsx
@@ -32,9 +32,14 @@ const UserAccountGroup = ({ user, allAccounts, onServiceAction }) => {
 
   const handleGrant = async () => {
     if (!linkAccountId) return
+    const accountId = Number(linkAccountId)
+    if (!Number.isInteger(accountId) || accountId < 1) {
+      alert('请选择有效的账号')
+      return
+    }
     setAssociating(true)
     try {
-      await api.grantUserAccount(user.id, linkAccountId, linkRole)
+      await api.grantUserAccount(user.id, accountId, linkRole)
       setLinkAccountId('')
       if (onServiceAction) onServiceAction(null, 'refresh')
     } catch (e) {
@@ -141,7 +146,7 @@ const UserAccountGroup = ({ user, allAccounts, onServiceAction }) => {
                     <td>
                       <button 
                         className="btn-icon"
-                        onClick={() => handleServiceAction(acc.id, acc.serviceStatus?.running ? 'stop' : 'start')}
+                        onClick={() => onServiceAction && onServiceAction(acc.id, acc.serviceStatus?.running ? 'stop' : 'start')}
                         title={acc.serviceStatus?.running ? '停止服务' : '启动服务'}
                       >
                         {acc.serviceStatus?.running ? '⏹' : '▶'}
@@ -199,6 +204,94 @@ const UserAccountGroup = ({ user, allAccounts, onServiceAction }) => {
   )
 }
 
+const CreateUserForm = ({ onSuccess }) => {
+  const [form, setForm] = useState({ username: '', password: '', role: 'user', status: 'active' })
+  const [busy, setBusy] = useState(false)
+  const [message, setMessage] = useState('')
+
+  const handleCreate = async () => {
+    if (!form.username.trim()) {
+      setMessage('请输入用户名')
+      return
+    }
+    if (!form.password.trim()) {
+      setMessage('请输入密码')
+      return
+    }
+    setBusy(true)
+    setMessage('')
+    try {
+      await api.createUser({
+        username: form.username.trim(),
+        password: form.password,
+        role: form.role,
+        status: form.status,
+      })
+      setMessage('用户已创建')
+      setForm({ username: '', password: '', role: 'user', status: 'active' })
+      if (onSuccess) onSuccess()
+    } catch (e) {
+      setMessage('创建用户失败: ' + (e?.message || '未知错误'))
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  return (
+    <div className="card create-user-card">
+      <h4 className="create-user-card-heading">新建用户</h4>
+      {message && (
+        <div className={`message ${message.includes('失败') ? 'error' : 'success'}`}>{message}</div>
+      )}
+      <div className="form-group">
+        <label>用户名</label>
+        <input
+          type="text"
+          value={form.username}
+          onChange={(e) => setForm({ ...form, username: e.target.value })}
+          placeholder="登录用，例如：trader1"
+        />
+      </div>
+      <div className="form-group">
+        <label>密码</label>
+        <input
+          type="password"
+          value={form.password}
+          onChange={(e) => setForm({ ...form, password: e.target.value })}
+          placeholder="设置登录密码"
+        />
+      </div>
+      <div className="form-group">
+        <label>角色</label>
+        <select
+          value={form.role}
+          onChange={(e) => setForm({ ...form, role: e.target.value })}
+        >
+          <option value="user">普通用户 (user)</option>
+          <option value="admin">管理员 (admin)</option>
+        </select>
+      </div>
+      <div className="form-group">
+        <label>状态</label>
+        <select
+          value={form.status}
+          onChange={(e) => setForm({ ...form, status: e.target.value })}
+        >
+          <option value="active">启用</option>
+          <option value="disabled">禁用</option>
+        </select>
+      </div>
+      <button
+        className="btn-primary full-width"
+        onClick={handleCreate}
+        disabled={busy || !form.username.trim() || !form.password}
+      >
+        {busy ? '创建中...' : '创建用户'}
+      </button>
+    </div>
+  )
+}
+
 const AccountManager = ({ accounts, onRefresh }) => {
   const [newAccount, setNewAccount] = useState({ name: '', api_key: '', api_secret: '', use_testnet: false, status: 'active' })
   const [credEditId, setCredEditId] = useState(null)
@@ -561,15 +654,22 @@ const AdminDashboard = () => {
 
       <div className="users-section">
         <h3>用户管理 ({users.length})</h3>
-        <div className="users-list">
-          {users.map(user => (
-            <UserAccountGroup 
-              key={user.id} 
-              user={user} 
-              allAccounts={data.allAccounts}
-              onServiceAction={handleServiceAction}
-            />
-          ))}
+        <div className="users-section-grid">
+          <div className="create-user-block">
+            <h4 className="create-user-title">➕ 添加用户</h4>
+            <p className="create-user-desc">创建新用户后，可在下方为其关联交易账号。</p>
+            <CreateUserForm onSuccess={loadData} />
+          </div>
+          <div className="users-list">
+            {users.map(user => (
+              <UserAccountGroup 
+                key={user.id} 
+                user={user} 
+                allAccounts={data.allAccounts}
+                onServiceAction={handleServiceAction}
+              />
+            ))}
+          </div>
         </div>
       </div>
 
diff --git a/frontend/src/components/StatsDashboard.css b/frontend/src/components/StatsDashboard.css
index 4e721ec..51e743c 100644
--- a/frontend/src/components/StatsDashboard.css
+++ b/frontend/src/components/StatsDashboard.css
@@ -276,6 +276,16 @@
   }
 }
 
+.trade-index {
+  flex-shrink: 0;
+  width: 2rem;
+  min-width: 2rem;
+  font-size: 0.9rem;
+  color: #6c757d;
+  font-weight: 600;
+  text-align: center;
+}
+
 .trade-symbol {
   font-weight: bold;
   color: #2c3e50;
diff --git a/frontend/src/components/StatsDashboard.jsx b/frontend/src/components/StatsDashboard.jsx
index 1f1c205..34aa442 100644
--- a/frontend/src/components/StatsDashboard.jsx
+++ b/frontend/src/components/StatsDashboard.jsx
@@ -677,6 +677,7 @@ const StatsDashboard = () => {
                 
                 return (
                   <div key={trade.id || trade.symbol || index} className="trade-item">
+                    <div className="trade-index" title="序号">{index + 1}</div>
                     <div className="trade-symbol">{trade.symbol}</div>
                     <div className={`trade-side ${trade.side === 'BUY' ? 'buy' : 'sell'}`}>
                       {trade.side}
diff --git a/frontend/src/services/api.js b/frontend/src/services/api.js
index 29667b6..a3185e4 100644
--- a/frontend/src/services/api.js
+++ b/frontend/src/services/api.js
@@ -814,10 +814,12 @@ export const api = {
     return response.json();
   },
   grantUserAccount: async (userId, accountId, role = 'viewer') => {
-    const response = await fetch(buildUrl(`/api/admin/users/${userId}/accounts/${accountId}`), {
+    const uid = Number(userId);
+    const aid = Number(accountId);
+    const response = await fetch(buildUrl(`/api/admin/users/${uid}/accounts/${aid}`), {
       method: 'PUT',
       headers: withAuthHeaders({ 'Content-Type': 'application/json' }),
-      body: JSON.stringify({ role }),
+      body: JSON.stringify({ role: role === 'owner' ? 'owner' : 'viewer' }),
     });
     if (!response.ok) {
       const error = await response.json().catch(() => ({ detail: '授权失败' }));