diff --git a/frontend/assets/favicon.svg b/frontend/assets/favicon.svg
index 8189c6e..a59ca75 100644
--- a/frontend/assets/favicon.svg
+++ b/frontend/assets/favicon.svg
@@ -1 +1,4 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg t="1763817367778" class="icon" viewBox="0 0 1292 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="28036" xmlns:xlink="http://www.w3.org/1999/xlink" width="252.34375" height="200"><path d="M1192.333763 0H99.918598A99.917961 99.917961 0 0 0 0.000636 100.236172V795.525171a99.917961 99.917961 0 0 0 99.917962 100.236171h1092.415165A100.236172 100.236172 0 0 0 1292.569934 795.525171V100.236172A100.236172 100.236172 0 0 0 1192.333763 0z m-122.829087 299.753884l-345.257924 275.25171-190.926041-203.654444-273.660659 266.660037a27.684276 27.684276 0 0 1-19.410814 7.637042 27.047856 27.047856 0 0 1-20.047234-9.228092 27.684276 27.684276 0 0 1 0-39.139839l313.436917-305.799875 195.062772 207.154754 305.481666-243.430702a28.320696 28.320696 0 0 1 39.139838 4.454941 28.002486 28.002486 0 0 1-3.818521 40.094468z" fill="#efb336" p-id="28037"></path><path d="M277.479816 964.176507m25.775016 0l686.060907 0q25.775016 0 25.775016 25.775016l0 8.273461q0 25.775016-25.775016 25.775016l-686.060907 0q-25.775016 0-25.775016-25.775016l0-8.273461q0-25.775016 25.775016-25.775016Z" fill="#efb336" p-id="28038"></path><path d="M613.509648 896.079553h64.914854v81.461777h-64.914854z" fill="#efb336" p-id="28039"></path></svg>
\ No newline at end of file
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 4091.27 4091.73" width="100" height="100">
+  <path fill="#F7931A" d="M4030.06 2540.77c-273.24,1096.01 -1383.32,1763.02 -2479.46,1489.71 -1095.68,-273.24 -1762.69,-1383.39 -1489.33,-2479.31 273.12,-1096.13 1383.2,-1763.19 2479,-1489.95 1096.06,273.24 1763.03,1383.51 1489.76,2479.57l0.02 -0.02z"/>
+  <path fill="white" d="M2947.77 1754.38c40.72,-272.26 -166.56,-418.61 -450,-516.24l91.95 -368.8 -224.5 -55.94 -89.51 359.09c-59.02,-14.72 -119.63,-28.59 -179.87,-42.34l90.16 -361.46 -224.36 -55.94 -92 368.68c-48.84,-11.12 -96.81,-22.11 -143.35,-33.69l0.26 -1.16 -309.59 -77.31 -59.72 239.78c0,0 166.56,38.18 163.05,40.53 90.91,22.69 107.35,82.87 104.62,130.57l-104.74 420.15c6.26,1.59 14.38,3.89 23.34,7.49 -7.49,-1.86 -15.46,-3.89 -23.73,-5.87l-146.81 588.57c-11.11,27.62 -39.31,69.07 -102.87,53.33 2.25,3.26 -163.17,-40.72 -163.17,-40.72l-111.46 256.98 292.15 72.83c54.35,13.63 107.61,27.89 160.06,41.3l-92.9 373.03 224.24 55.94 92 -369.07c61.26,16.63 120.71,31.97 178.91,46.43l-91.69 367.33 224.51 55.94 92.89 -372.33c382.82,72.45 670.67,43.24 791.83,-303.02 97.63,-278.78 -4.86,-439.58 -206.26,-544.44 146.69,-33.83 257.18,-130.31 286.64,-329.61l-0.07 -0.05zm-512.93 719.26c-69.38,278.78 -538.76,128.08 -690.94,90.29l123.28 -494.2c152.17,37.99 640.17,113.17 567.67,403.91zm69.43 -723.3c-63.29,253.58 -453.96,124.75 -580.69,93.16l111.77 -448.21c126.73,31.59 534.85,90.55 468.94,355.05l-0.02 0z"/>
+</svg>
\ No newline at end of file
diff --git a/frontend/assets/login.css b/frontend/assets/login.css
index f30b076..2a62e8b 100644
--- a/frontend/assets/login.css
+++ b/frontend/assets/login.css
@@ -134,6 +134,48 @@ body {
   filter: drop-shadow(0 4px 8px rgba(59, 130, 246, 0.3));
 }
 
+/* 比特币旋转硬币 */
+.logo-icon.bitcoin-coin {
+  perspective: 500px;
+  animation: none;
+}
+
+.logo-icon.bitcoin-coin .coin-face {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  border-radius: 50%;
+  backface-visibility: hidden;
+}
+
+.logo-icon.bitcoin-coin .front {
+  transform: translateZ(2px);
+  animation: rotate-bitcoin 7s infinite linear;
+  transform-style: preserve-3d;
+}
+
+.logo-icon.bitcoin-coin .back {
+  transform: rotateY(180deg) translateZ(2px);
+  animation: rotate-bitcoin 7s infinite linear;
+  transform-style: preserve-3d;
+}
+
+.logo-icon.bitcoin-coin::before {
+  content: '';
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  background: linear-gradient(90deg, #b36a00, #faa504, #b36a00);
+  border-radius: 50%;
+  animation: rotate-bitcoin 7s infinite linear;
+  transform-style: preserve-3d;
+}
+
+@keyframes rotate-bitcoin {
+  0% { transform: rotateY(0deg); }
+  100% { transform: rotateY(360deg); }
+}
+
 @keyframes float-icon {
   0%, 100% {
     transform: translateY(0) scale(1);
diff --git a/frontend/assets/styles.css b/frontend/assets/styles.css
index 2a62263..021458d 100644
--- a/frontend/assets/styles.css
+++ b/frontend/assets/styles.css
@@ -12,6 +12,15 @@ body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui
 .brand-logo svg{width:18px;height:18px;color:#fff}
 .brand-logo.dollar-spinner{border-top:2px solid #eab308;background:#fde047;animation:spin 1s linear infinite;border-radius:50%;color:#a16207;font-weight:700;font-size:16px}
 @keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}
+.coin-wrapper{width:32px;height:32px;perspective:500px;flex-shrink:0}
+.coin{width:32px;height:32px;position:relative;animation:rotate_coin 7s infinite linear;transform-style:preserve-3d}
+.coin .side{position:absolute;width:100%;height:100%;border-radius:50%;backface-visibility:hidden}
+.coin .heads{transform:translateZ(1.5px)}
+.coin .tails{transform:rotateY(180deg) translateZ(1.5px)}
+.coin::before{content:'';position:absolute;width:100%;height:100%;background:linear-gradient(90deg,#b36a00,#faa504,#b36a00);border-radius:50%;transform:translateZ(0px)}
+.coin::after{content:'';position:absolute;width:100%;height:100%;border-radius:50%;box-shadow:inset 0 0 0 1.5px #b36a00,0 0 2px rgba(0,0,0,0.3);transform:translateZ(1.5px)}
+@keyframes rotate_coin{100%{transform:rotateY(360deg)}}
+.coin .svg_back{transform:scaleX(-1)}
 .brand-text{display:flex;flex-direction:column;line-height:1.2;overflow:hidden}
 .brand-title{font-size:15px;font-weight:700;color:var(--text);letter-spacing:0.5px;white-space:nowrap}
 .brand-subtitle{font-size:10px;color:var(--text-2);letter-spacing:1px;text-transform:uppercase;font-weight:500;white-space:nowrap}
@@ -23,6 +32,8 @@ body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui
 .sidebar.collapsed .brand-logo{width:40px;height:40px;border-radius:10px}
 .sidebar.collapsed .brand-logo svg{width:22px;height:22px}
 .sidebar.collapsed .brand-logo.dollar-spinner{border-radius:50%;font-size:20px}
+.sidebar.collapsed .coin-wrapper{width:36px;height:36px}
+.sidebar.collapsed .coin{width:36px;height:36px}
 .sidebar.collapsed .sidebar-toggle{width:40px;height:32px;background:rgba(79,140,255,0.08);border-radius:8px}
 .sidebar-toggle{width:36px;height:36px;border:none;background:transparent;color:var(--text-2);cursor:pointer;border-radius:8px;display:flex;align-items:center;justify-content:center;transition:all 0.2s ease;flex-shrink:0}
 .sidebar-toggle:hover{background:rgba(79,140,255,.12);color:var(--text)}
diff --git a/frontend/index.html b/frontend/index.html
index 78eaf7e..d313784 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -16,7 +16,26 @@
   <aside class="sidebar" id="sidebar">
     <div class="brand-container">
       <div class="loader-wrapper">
-        <div class="brand-logo dollar-spinner">$</div>
+        <div class="coin-wrapper">
+          <div class="coin">
+            <div class="side heads">
+            <svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="100%" height="100%" version="1.1" shape-rendering="geometricPrecision" text-rendering="geometricPrecision" image-rendering="optimizeQuality" fill-rule="evenodd" clip-rule="evenodd" viewBox="0 0 4091.27 4091.73">
+              <g id="Layer_x0020_1">
+                <path fill="#F7931A" fill-rule="nonzero" d="M4030.06 2540.77c-273.24,1096.01 -1383.32,1763.02 -2479.46,1489.71 -1095.68,-273.24 -1762.69,-1383.39 -1489.33,-2479.31 273.12,-1096.13 1383.2,-1763.19 2479,-1489.95 1096.06,273.24 1763.03,1383.51 1489.76,2479.57l0.02 -0.02z"></path>
+                <path fill="white" fill-rule="nonzero" d="M2947.77 1754.38c40.72,-272.26 -166.56,-418.61 -450,-516.24l91.95 -368.8 -224.5 -55.94 -89.51 359.09c-59.02,-14.72 -119.63,-28.59 -179.87,-42.34l90.16 -361.46 -224.36 -55.94 -92 368.68c-48.84,-11.12 -96.81,-22.11 -143.35,-33.69l0.26 -1.16 -309.59 -77.31 -59.72 239.78c0,0 166.56,38.18 163.05,40.53 90.91,22.69 107.35,82.87 104.62,130.57l-104.74 420.15c6.26,1.59 14.38,3.89 23.34,7.49 -7.49,-1.86 -15.46,-3.89 -23.73,-5.87l-146.81 588.57c-11.11,27.62 -39.31,69.07 -102.87,53.33 2.25,3.26 -163.17,-40.72 -163.17,-40.72l-111.46 256.98 292.15 72.83c54.35,13.63 107.61,27.89 160.06,41.3l-92.9 373.03 224.24 55.94 92 -369.07c61.26,16.63 120.71,31.97 178.91,46.43l-91.69 367.33 224.51 55.94 92.89 -372.33c382.82,72.45 670.67,43.24 791.83,-303.02 97.63,-278.78 -4.86,-439.58 -206.26,-544.44 146.69,-33.83 257.18,-130.31 286.64,-329.61l-0.07 -0.05zm-512.93 719.26c-69.38,278.78 -538.76,128.08 -690.94,90.29l123.28 -494.2c152.17,37.99 640.17,113.17 567.67,403.91zm69.43 -723.3c-63.29,253.58 -453.96,124.75 -580.69,93.16l111.77 -448.21c126.73,31.59 534.85,90.55 468.94,355.05l-0.02 0z"></path>
+              </g>
+            </svg>
+          </div>
+          <div class="side tails">
+            <svg xmlns="http://www.w3.org/2000/svg" class="svg_back" xml:space="preserve" width="100%" height="100%" version="1.1" shape-rendering="geometricPrecision" text-rendering="geometricPrecision" image-rendering="optimizeQuality" fill-rule="evenodd" clip-rule="evenodd" viewBox="0 0 4091.27 4091.73">
+              <g id="Layer_x0020_1">
+                <path fill="#F7931A" fill-rule="nonzero" d="M4030.06 2540.77c-273.24,1096.01 -1383.32,1763.02 -2479.46,1489.71 -1095.68,-273.24 -1762.69,-1383.39 -1489.33,-2479.31 273.12,-1096.13 1383.2,-1763.19 2479,-1489.95 1096.06,273.24 1763.03,1383.51 1489.76,2479.57l0.02 -0.02z"></path>
+                <path fill="white" fill-rule="nonzero" d="M2947.77 1754.38c40.72,-272.26 -166.56,-418.61 -450,-516.24l91.95 -368.8 -224.5 -55.94 -89.51 359.09c-59.02,-14.72 -119.63,-28.59 -179.87,-42.34l90.16 -361.46 -224.36 -55.94 -92 368.68c-48.84,-11.12 -96.81,-22.11 -143.35,-33.69l0.26 -1.16 -309.59 -77.31 -59.72 239.78c0,0 166.56,38.18 163.05,40.53 90.91,22.69 107.35,82.87 104.62,130.57l-104.74 420.15c6.26,1.59 14.38,3.89 23.34,7.49 -7.49,-1.86 -15.46,-3.89 -23.73,-5.87l-146.81 588.57c-11.11,27.62 -39.31,69.07 -102.87,53.33 2.25,3.26 -163.17,-40.72 -163.17,-40.72l-111.46 256.98 292.15 72.83c54.35,13.63 107.61,27.89 160.06,41.3l-92.9 373.03 224.24 55.94 92 -369.07c61.26,16.63 120.71,31.97 178.91,46.43l-91.69 367.33 224.51 55.94 92.89 -372.33c382.82,72.45 670.67,43.24 791.83,-303.02 97.63,-278.78 -4.86,-439.58 -206.26,-544.44 146.69,-33.83 257.18,-130.31 286.64,-329.61l-0.07 -0.05zm-512.93 719.26c-69.38,278.78 -538.76,128.08 -690.94,90.29l123.28 -494.2c152.17,37.99 640.17,113.17 567.67,403.91zm69.43 -723.3c-63.29,253.58 -453.96,124.75 -580.69,93.16l111.77 -448.21c126.73,31.59 534.85,90.55 468.94,355.05l-0.02 0z"></path>
+              </g>
+            </svg>
+          </div>
+        </div>
+      </div>
         <div class="brand-text">
           <span class="brand-title">韬智生产管理</span>
           <span class="brand-subtitle">Production System</span>
@@ -180,6 +199,13 @@
           <span class="text">设置</span>
         </a>
       </div>
+      <div class="nav-group superadmin-only" style="display:none;">
+        <div class="nav-group-title">系统管理</div>
+        <a href="#/system/operations-log" class="nav-item" data-route="system-operations-log">
+          <span class="icon">📜</span>
+          <span class="text">操作日志</span>
+        </a>
+      </div>
     </nav>
     <div class="theme-toggle-container">
       <label class="bb8-toggle">
@@ -289,6 +315,7 @@
 <script src="./js/components/export.js"></script>
 <script src="./js/components/settings.js"></script>
 <script src="./js/components/notifications.js"></script>
+<script src="./js/components/operations-log.js"></script>
 <script src="./js/app.js"></script>
 </body>
 </html>
\ No newline at end of file
diff --git a/frontend/js/app.js b/frontend/js/app.js
index 7ca4aab..f017659 100644
--- a/frontend/js/app.js
+++ b/frontend/js/app.js
@@ -51,6 +51,16 @@
         planMgmtGroup.style.display = 'none';
       }
     }
+    
+    // 超级管理员专属菜单（系统管理）
+    const superadminMenus = document.querySelectorAll('.superadmin-only');
+    superadminMenus.forEach(menu => {
+      if (user && user.role === 'superadmin') {
+        menu.style.display = '';
+      } else {
+        menu.style.display = 'none';
+      }
+    });
   }
   
   // 创建水印
diff --git a/frontend/js/components/customer-order.js b/frontend/js/components/customer-order.js
index 664b7ef..b85aef1 100644
--- a/frontend/js/components/customer-order.js
+++ b/frontend/js/components/customer-order.js
@@ -124,7 +124,7 @@
             <td>${order.order_date || '—'}</td>
             <td>${order.order_no || '—'}</td>
             <td>${order.customer_name || '—'}</td>
-            <td style="white-space: pre-wrap;">${order.material || '—'}</td>
+            <td style="white-space: pre-line; word-break: break-word;">${order.material || '—'}</td>
             <td>${order.quantity || 0}</td>
             <td>${order.unit_price || 0}</td>
             <td>
diff --git a/frontend/js/components/operations-log.js b/frontend/js/components/operations-log.js
new file mode 100644
index 0000000..00a8544
--- /dev/null
+++ b/frontend/js/components/operations-log.js
@@ -0,0 +1,234 @@
+// 操作日志管理
+(() => {
+  let currentPage = 1;
+  const pageSize = 50;
+  
+  Router.register('/system/operations-log', async () => {
+    const html = `
+      <div class="page-header">
+        <h1>操作日志</h1>
+        <div class="page-actions">
+          <input type="text" id="keyword-filter" class="input" placeholder="搜索操作详情..." style="width: 200px; margin-right: 10px;" />
+          <button id="search-btn" class="btn btn-secondary">搜索</button>
+          <button id="cleanup-btn" class="btn btn-danger" style="margin-left: 10px;">清理旧日志</button>
+        </div>
+      </div>
+      
+      <div class="card">
+        <div class="card-body">
+          <div class="table-container">
+            <table class="data-table">
+              <thead>
+                <tr>
+                  <th style="width: 60px;">ID</th>
+                  <th style="width: 100px;">用户</th>
+                  <th style="width: 150px;">操作类型</th>
+                  <th>操作详情</th>
+                  <th style="width: 180px;">操作时间</th>
+                </tr>
+              </thead>
+              <tbody id="log-list">
+                <tr>
+                  <td colspan="5" class="text-center">加载中...</td>
+                </tr>
+              </tbody>
+            </table>
+          </div>
+          
+          <div id="pagination" style="margin-top: 20px; display: flex; justify-content: space-between; align-items: center;">
+            <div id="page-info"></div>
+            <div>
+              <button id="prev-btn" class="btn btn-secondary" disabled>上一页</button>
+              <button id="next-btn" class="btn btn-secondary" style="margin-left: 10px;">下一页</button>
+            </div>
+          </div>
+        </div>
+      </div>
+    `;
+    
+    setTimeout(() => {
+      loadLogs();
+      
+      document.getElementById('search-btn')?.addEventListener('click', () => {
+        currentPage = 1;
+        loadLogs();
+      });
+      
+      document.getElementById('keyword-filter')?.addEventListener('keypress', (e) => {
+        if (e.key === 'Enter') {
+          currentPage = 1;
+          loadLogs();
+        }
+      });
+      
+      document.getElementById('cleanup-btn')?.addEventListener('click', cleanupLogs);
+      document.getElementById('prev-btn')?.addEventListener('click', () => {
+        if (currentPage > 1) {
+          currentPage--;
+          loadLogs();
+        }
+      });
+      document.getElementById('next-btn')?.addEventListener('click', () => {
+        currentPage++;
+        loadLogs();
+      });
+    }, 100);
+    
+    return html;
+  });
+  
+  // 操作类型中文映射
+  const actionLabels = {
+    'login': '登录',
+    'logout': '登出',
+    'create_customer_order': '创建客户订单',
+    'update_customer_order': '更新客户订单',
+    'delete_customer_order': '删除客户订单',
+    'create_reconciliation': '创建对账单',
+    'update_reconciliation': '更新对账单',
+    'delete_reconciliation': '删除对账单',
+    'batch_delete_reconciliation': '批量删除对账单',
+    'batch_delete_reconciliations': '批量删除对账单',
+    'create_work_order': '创建工单',
+    'update_work_order': '更新工单',
+    'delete_work_order': '删除工单',
+    'confirm_work_order': '确认工单',
+    'create_bom': '创建BOM',
+    'update_bom': '更新BOM',
+    'delete_bom': '删除BOM',
+    'import_bom': '导入BOM',
+    'create_initial_stock': '创建期初库存',
+    'update_initial_stock': '更新期初库存',
+    'delete_initial_stock': '删除期初库存',
+    'import_initial_stock': '导入期初库存',
+    'create_purchase_demand': '创建采购需求',
+    'update_purchase_demand': '更新采购需求',
+    'delete_purchase_demand': '删除采购需求',
+    'create_material_purchase': '创建物料采购',
+    'update_material_purchase': '更新物料采购',
+    'delete_material_purchase': '删除物料采购',
+    'batch_delete_material_purchase': '批量删除物料采购',
+    'import_material_purchase': '导入物料采购',
+    'cleanup_operations_log': '清理操作日志',
+    'add_personnel': '添加人员',
+    'upload_sop': '上传SOP',
+    'delete_sop': '删除SOP',
+    'upload_mac': '上传MAC',
+    'upload_stats': '上传统计',
+    'upload_repairs': '上传返修',
+    'upload_shipments': '上传发货',
+    'create_shipment': '创建发货',
+    'delete_shipment': '删除发货',
+    'clear_redis': '清空缓存',
+    'audit_yt_cost': '审核易泰勒成本',
+    'audit_yt_probe': '审核易泰勒探针',
+    'audit_pdd_cost': '审核拼多多成本',
+    'audit_pdd_probe': '审核拼多多探针',
+    'upload_shipment': '上传发货记录'
+  };
+  
+  function getActionLabel(action) {
+    return actionLabels[action] || action;
+  }
+  
+  async function loadLogs() {
+    try {
+      const keyword = document.getElementById('keyword-filter')?.value || '';
+      const res = await fetch(`/api/operations-log?page=${currentPage}&page_size=${pageSize}&keyword=${encodeURIComponent(keyword)}`);
+      const data = await res.json();
+      
+      const tbody = document.getElementById('log-list');
+      if (!tbody) return;
+      
+      if (!data.list || data.list.length === 0) {
+        tbody.innerHTML = '<tr><td colspan="5" class="text-center">暂无数据</td></tr>';
+        updatePagination(0);
+        return;
+      }
+      
+      tbody.innerHTML = data.list.map(log => `
+        <tr>
+          <td>${log.id}</td>
+          <td>${log.username || '—'}</td>
+          <td><span class="badge">${getActionLabel(log.action)}</span></td>
+          <td style="max-width: 400px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;" title="${escapeHtml(log.detail || '')}">${log.detail || '—'}</td>
+          <td>${formatTime(log.ts)}</td>
+        </tr>
+      `).join('');
+      
+      updatePagination(data.total);
+    } catch (err) {
+      console.error('加载操作日志失败:', err);
+      API.toast('加载失败', 'error');
+    }
+  }
+  
+  function updatePagination(total) {
+    const pageInfo = document.getElementById('page-info');
+    const prevBtn = document.getElementById('prev-btn');
+    const nextBtn = document.getElementById('next-btn');
+    
+    const totalPages = Math.ceil(total / pageSize);
+    
+    if (pageInfo) {
+      pageInfo.textContent = `共 ${total} 条记录，第 ${currentPage}/${totalPages || 1} 页`;
+    }
+    
+    if (prevBtn) {
+      prevBtn.disabled = currentPage <= 1;
+    }
+    
+    if (nextBtn) {
+      nextBtn.disabled = currentPage >= totalPages;
+    }
+  }
+  
+  function formatTime(ts) {
+    if (!ts) return '—';
+    try {
+      const date = new Date(ts);
+      return date.toLocaleString('zh-CN', {
+        year: 'numeric',
+        month: '2-digit',
+        day: '2-digit',
+        hour: '2-digit',
+        minute: '2-digit',
+        second: '2-digit'
+      });
+    } catch {
+      return ts;
+    }
+  }
+  
+  function escapeHtml(str) {
+    if (!str) return '';
+    return str.replace(/&/g, '&amp;')
+              .replace(/</g, '&lt;')
+              .replace(/>/g, '&gt;')
+              .replace(/"/g, '&quot;');
+  }
+  
+  async function cleanupLogs() {
+    if (!confirm('确定要清理3个月前的旧日志吗？此操作不可恢复。')) {
+      return;
+    }
+    
+    try {
+      const res = await fetch('/api/operations-log/cleanup', {
+        method: 'DELETE'
+      });
+      
+      const data = await res.json();
+      
+      if (res.ok && data.ok) {
+        API.toast(data.message, 'success');
+        loadLogs();
+      } else {
+        API.toast(data.error || '清理失败', 'error');
+      }
+    } catch (err) {
+      console.error('清理日志失败:', err);
+      API.toast('清理失败', 'error');
+    }
+  }
+})();
diff --git a/frontend/login.html b/frontend/login.html
index b1adef5..3190787 100644
--- a/frontend/login.html
+++ b/frontend/login.html
@@ -16,64 +16,19 @@
   <div class="login-card">
     <div class="login-header">
       <div class="logo-container">
-        <div class="logo-icon">
-          <svg viewBox="0 0 64 64" fill="none" xmlns="http://www.w3.org/2000/svg">
-            <!-- 工厂主体 -->
-            <path d="M8 52h48v8H8z" fill="url(#grad1)"/>
-            <!-- 左侧建筑 -->
-            <path d="M8 28h16v24H8z" fill="url(#grad2)"/>
-            <!-- 中间建筑 -->
-            <path d="M24 20h16v32H24z" fill="url(#grad3)"/>
-            <!-- 右侧建筑 -->
-            <path d="M40 24h16v28H40z" fill="url(#grad4)"/>
-            <!-- 烟囱 -->
-            <rect x="14" y="16" width="4" height="12" rx="1" fill="#60a5fa"/>
-            <rect x="30" y="10" width="4" height="10" rx="1" fill="#60a5fa"/>
-            <rect x="46" y="14" width="4" height="10" rx="1" fill="#60a5fa"/>
-            <!-- 烟雾 -->
-            <circle cx="16" cy="14" r="2" fill="#93c5fd" opacity="0.6"/>
-            <circle cx="18" cy="12" r="2.5" fill="#93c5fd" opacity="0.5"/>
-            <circle cx="32" cy="8" r="2" fill="#93c5fd" opacity="0.6"/>
-            <circle cx="34" cy="6" r="2.5" fill="#93c5fd" opacity="0.5"/>
-            <circle cx="48" cy="12" r="2" fill="#93c5fd" opacity="0.6"/>
-            <circle cx="50" cy="10" r="2.5" fill="#93c5fd" opacity="0.5"/>
-            <!-- 窗户 -->
-            <rect x="12" y="34" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="18" y="34" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="12" y="42" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="18" y="42" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="28" y="26" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="34" y="26" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="28" y="34" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="34" y="34" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="28" y="42" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="34" y="42" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="44" y="30" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="50" y="30" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="44" y="38" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <rect x="50" y="38" width="4" height="4" rx="0.5" fill="#dbeafe"/>
-            <!-- 大门 -->
-            <rect x="28" y="48" width="8" height="4" rx="0.5" fill="#1e40af"/>
-            <!-- 渐变定义 -->
-            <defs>
-              <linearGradient id="grad1" x1="0%" y1="0%" x2="0%" y2="100%">
-                <stop offset="0%" style="stop-color:#1e3a8a;stop-opacity:1" />
-                <stop offset="100%" style="stop-color:#1e40af;stop-opacity:1" />
-              </linearGradient>
-              <linearGradient id="grad2" x1="0%" y1="0%" x2="0%" y2="100%">
-                <stop offset="0%" style="stop-color:#2563eb;stop-opacity:1" />
-                <stop offset="100%" style="stop-color:#1e40af;stop-opacity:1" />
-              </linearGradient>
-              <linearGradient id="grad3" x1="0%" y1="0%" x2="0%" y2="100%">
-                <stop offset="0%" style="stop-color:#3b82f6;stop-opacity:1" />
-                <stop offset="100%" style="stop-color:#2563eb;stop-opacity:1" />
-              </linearGradient>
-              <linearGradient id="grad4" x1="0%" y1="0%" x2="0%" y2="100%">
-                <stop offset="0%" style="stop-color:#60a5fa;stop-opacity:1" />
-                <stop offset="100%" style="stop-color:#3b82f6;stop-opacity:1" />
-              </linearGradient>
-            </defs>
-          </svg>
+        <div class="logo-icon bitcoin-coin">
+          <div class="coin-face front">
+            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 4091.27 4091.73" width="100%" height="100%">
+              <path fill="#F7931A" d="M4030.06 2540.77c-273.24,1096.01 -1383.32,1763.02 -2479.46,1489.71 -1095.68,-273.24 -1762.69,-1383.39 -1489.33,-2479.31 273.12,-1096.13 1383.2,-1763.19 2479,-1489.95 1096.06,273.24 1763.03,1383.51 1489.76,2479.57l0.02 -0.02z"/>
+              <path fill="white" d="M2947.77 1754.38c40.72,-272.26 -166.56,-418.61 -450,-516.24l91.95 -368.8 -224.5 -55.94 -89.51 359.09c-59.02,-14.72 -119.63,-28.59 -179.87,-42.34l90.16 -361.46 -224.36 -55.94 -92 368.68c-48.84,-11.12 -96.81,-22.11 -143.35,-33.69l0.26 -1.16 -309.59 -77.31 -59.72 239.78c0,0 166.56,38.18 163.05,40.53 90.91,22.69 107.35,82.87 104.62,130.57l-104.74 420.15c6.26,1.59 14.38,3.89 23.34,7.49 -7.49,-1.86 -15.46,-3.89 -23.73,-5.87l-146.81 588.57c-11.11,27.62 -39.31,69.07 -102.87,53.33 2.25,3.26 -163.17,-40.72 -163.17,-40.72l-111.46 256.98 292.15 72.83c54.35,13.63 107.61,27.89 160.06,41.3l-92.9 373.03 224.24 55.94 92 -369.07c61.26,16.63 120.71,31.97 178.91,46.43l-91.69 367.33 224.51 55.94 92.89 -372.33c382.82,72.45 670.67,43.24 791.83,-303.02 97.63,-278.78 -4.86,-439.58 -206.26,-544.44 146.69,-33.83 257.18,-130.31 286.64,-329.61l-0.07 -0.05zm-512.93 719.26c-69.38,278.78 -538.76,128.08 -690.94,90.29l123.28 -494.2c152.17,37.99 640.17,113.17 567.67,403.91zm69.43 -723.3c-63.29,253.58 -453.96,124.75 -580.69,93.16l111.77 -448.21c126.73,31.59 534.85,90.55 468.94,355.05l-0.02 0z"/>
+            </svg>
+          </div>
+          <div class="coin-face back">
+            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 4091.27 4091.73" width="100%" height="100%" style="transform:scaleX(-1)">
+              <path fill="#F7931A" d="M4030.06 2540.77c-273.24,1096.01 -1383.32,1763.02 -2479.46,1489.71 -1095.68,-273.24 -1762.69,-1383.39 -1489.33,-2479.31 273.12,-1096.13 1383.2,-1763.19 2479,-1489.95 1096.06,273.24 1763.03,1383.51 1489.76,2479.57l0.02 -0.02z"/>
+              <path fill="white" d="M2947.77 1754.38c40.72,-272.26 -166.56,-418.61 -450,-516.24l91.95 -368.8 -224.5 -55.94 -89.51 359.09c-59.02,-14.72 -119.63,-28.59 -179.87,-42.34l90.16 -361.46 -224.36 -55.94 -92 368.68c-48.84,-11.12 -96.81,-22.11 -143.35,-33.69l0.26 -1.16 -309.59 -77.31 -59.72 239.78c0,0 166.56,38.18 163.05,40.53 90.91,22.69 107.35,82.87 104.62,130.57l-104.74 420.15c6.26,1.59 14.38,3.89 23.34,7.49 -7.49,-1.86 -15.46,-3.89 -23.73,-5.87l-146.81 588.57c-11.11,27.62 -39.31,69.07 -102.87,53.33 2.25,3.26 -163.17,-40.72 -163.17,-40.72l-111.46 256.98 292.15 72.83c54.35,13.63 107.61,27.89 160.06,41.3l-92.9 373.03 224.24 55.94 92 -369.07c61.26,16.63 120.71,31.97 178.91,46.43l-91.69 367.33 224.51 55.94 92.89 -372.33c382.82,72.45 670.67,43.24 791.83,-303.02 97.63,-278.78 -4.86,-439.58 -206.26,-544.44 146.69,-33.83 257.18,-130.31 286.64,-329.61l-0.07 -0.05zm-512.93 719.26c-69.38,278.78 -538.76,128.08 -690.94,90.29l123.28 -494.2c152.17,37.99 640.17,113.17 567.67,403.91zm69.43 -723.3c-63.29,253.58 -453.96,124.75 -580.69,93.16l111.77 -448.21c126.73,31.59 534.85,90.55 468.94,355.05l-0.02 0z"/>
+            </svg>
+          </div>
         </div>
         <h1 class="system-title">韬智生产管理系统</h1>
       </div>
diff --git a/server/app.py b/server/app.py
index 5c62a6e..a4453b0 100644
--- a/server/app.py
+++ b/server/app.py
@@ -305,6 +305,9 @@ def init_db():
 
 
 def log(action, detail=''):
+    # 过滤掉审计相关的操作，不记录到日志
+    if action.startswith('audit_'):
+        return
     try:
         conn = get_db()
         c = conn.cursor()
@@ -3702,7 +3705,7 @@ def create_customer_order():
     order_date = data.get('order_date', '').strip()
     order_no = data.get('order_no', '').strip()
     customer_name = data.get('customer_name', '').strip()
-    material = data.get('material', '').strip()
+    material = data.get('material', '').strip().replace(' ', '\n')  # 空格转换行
     quantity = data.get('quantity', 0)
     unit_price = data.get('unit_price', 0)
     
@@ -3748,7 +3751,7 @@ def update_customer_order(order_id):
     order_date = data.get('order_date', '').strip()
     order_no = data.get('order_no', '').strip()
     customer_name = data.get('customer_name', '').strip()
-    material = data.get('material', '').strip()
+    material = data.get('material', '').strip().replace(' ', '\n')  # 空格转换行
     quantity = data.get('quantity')
     unit_price = data.get('unit_price')
     
@@ -3777,13 +3780,13 @@ def update_customer_order(order_id):
         return jsonify({'error': '订单不存在'}), 404
     
     # 更新订单
+    now = get_beijing_time()
     c.execute('''UPDATE customer_orders 
                  SET order_date=?, order_no=?, customer_name=?, material=?, 
-                     quantity=?, unit_price=?, updated_at=?, updated_by=?
+                     quantity=?, unit_price=?, updated_at=?
                  WHERE id=?''',
               (order_date, order_no, customer_name, material, quantity, unit_price,
-               datetime.now(timezone(timedelta(hours=8))).isoformat(), 
-               session.get('username', 'unknown'), order_id))
+               now, order_id))
     
     conn.commit()
     conn.close()
@@ -5276,6 +5279,89 @@ def not_found(e):
     return jsonify({'error': 'not found'}), 404
 
 
+# ==================== 操作日志管理 ====================
+
+@app.get('/api/operations-log')
+@require_login
+@require_any_role('superadmin')
+def get_operations_log():
+    """获取操作日志列表"""
+    page = request.args.get('page', 1, type=int)
+    page_size = request.args.get('page_size', 50, type=int)
+    keyword = request.args.get('keyword', '')
+    
+    conn = get_db()
+    c = conn.cursor()
+    
+    # 构建查询 - 按操作详情搜索
+    where_clause = ''
+    params = []
+    if keyword:
+        where_clause = 'WHERE o.detail LIKE ?'
+        params.append(f'%{keyword}%')
+    
+    # 获取总数
+    c.execute(f'SELECT COUNT(*) FROM operations_log o {where_clause}', params)
+    total = c.fetchone()[0]
+    
+    # 分页查询，关联用户表获取用户名
+    offset = (page - 1) * page_size
+    c.execute(f'''
+        SELECT o.id, o.user_id, o.action, o.detail, o.ts, u.username
+        FROM operations_log o
+        LEFT JOIN users u ON o.user_id = u.id
+        {where_clause}
+        ORDER BY o.id DESC
+        LIMIT ? OFFSET ?
+    ''', params + [page_size, offset])
+    
+    rows = c.fetchall()
+    conn.close()
+    
+    logs = []
+    for row in rows:
+        logs.append({
+            'id': row['id'],
+            'user_id': row['user_id'],
+            'username': row['username'] or '系统',
+            'action': row['action'],
+            'detail': row['detail'],
+            'ts': row['ts']
+        })
+    
+    return jsonify({
+        'list': logs,
+        'total': total,
+        'page': page,
+        'page_size': page_size
+    })
+
+
+@app.delete('/api/operations-log/cleanup')
+@require_login
+@require_any_role('superadmin')
+def cleanup_operations_log():
+    """清理3个月前的操作日志"""
+    from datetime import datetime, timedelta
+    
+    # 计算3个月前的日期
+    three_months_ago = (datetime.now() - timedelta(days=90)).isoformat()
+    
+    conn = get_db()
+    c = conn.cursor()
+    
+    # 删除旧日志
+    c.execute('DELETE FROM operations_log WHERE ts < ?', (three_months_ago,))
+    deleted_count = c.rowcount
+    
+    conn.commit()
+    conn.close()
+    
+    log('cleanup_operations_log', f'清理了 {deleted_count} 条旧日志')
+    
+    return jsonify({'ok': True, 'deleted': deleted_count, 'message': f'已清理 {deleted_count} 条旧日志'})
+
+
 init_db()