feat: 添加更多工具按钮，支持多选工具

www/style.css

@@ -2740,6 +2740,193 @@ body {
   flex-shrink: 0;
 }
 
+/* 更多工具按钮 */
+.tools-btn {
+  position: relative;
+}
+
+.tools-count {
+  position: absolute;
+  top: -4px;
+  right: -4px;
+  min-width: 16px;
+  height: 16px;
+  padding: 0 4px;
+  background: #ef4444;
+  color: white;
+  font-size: 11px;
+  font-weight: 600;
+  border-radius: 8px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+/* 工具选择弹窗 */
+.tools-popup {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: rgba(0, 0, 0, 0.5);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 1000;
+}
+
+.tools-popup-content {
+  width: 90%;
+  max-width: 400px;
+  background: white;
+  border-radius: 16px;
+  overflow: hidden;
+}
+
+.tools-popup-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 16px 20px;
+  background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+  color: white;
+}
+
+.tools-popup-header h3 {
+  margin: 0;
+  font-size: 18px;
+}
+
+.tools-popup-close {
+  width: 28px;
+  height: 28px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: rgba(255, 255, 255, 0.2);
+  border: none;
+  border-radius: 14px;
+  color: white;
+  font-size: 20px;
+  cursor: pointer;
+  transition: background 0.2s;
+}
+
+.tools-popup-close:hover {
+  background: rgba(255, 255, 255, 0.3);
+}
+
+.tools-popup-body {
+  padding: 16px 20px;
+}
+
+.tools-popup-tip {
+  color: #718096;
+  font-size: 13px;
+  margin-bottom: 16px;
+}
+
+.tools-list {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  max-height: 300px;
+  overflow-y: auto;
+}
+
+.tool-option {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px 16px;
+  background: #f5f7fa;
+  border: 2px solid transparent;
+  border-radius: 12px;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.tool-option:hover {
+  background: #e8ecf1;
+}
+
+.tool-option.selected {
+  background: rgba(102, 126, 234, 0.1);
+  border-color: var(--primary);
+}
+
+.tool-checkbox {
+  flex-shrink: 0;
+  color: #718096;
+}
+
+.tool-option.selected .tool-checkbox {
+  color: var(--primary);
+}
+
+.tool-icon {
+  width: 40px;
+  height: 40px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: white;
+  border-radius: 10px;
+  font-size: 20px;
+}
+
+.tool-info {
+  flex: 1;
+}
+
+.tool-name {
+  font-weight: 500;
+  color: #2d3748;
+}
+
+.tool-type {
+  font-size: 12px;
+  color: #718096;
+  margin-top: 2px;
+}
+
+.tools-popup-footer {
+  display: flex;
+  gap: 12px;
+  padding: 16px 20px;
+  background: #f5f7fa;
+}
+
+.tools-popup-btn {
+  flex: 1;
+  padding: 12px;
+  border: none;
+  border-radius: 10px;
+  font-size: 14px;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.tools-popup-btn.cancel {
+  background: #e2e8f0;
+  color: #4a5568;
+}
+
+.tools-popup-btn.cancel:hover {
+  background: #cbd5e0;
+}
+
+.tools-popup-btn.confirm {
+  background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+  color: white;
+}
+
+.tools-popup-btn.confirm:hover {
+  transform: scale(1.02);
+}
+
 /* 导航按钮样式 */
 .nav-btn {
   padding: 6px 8px;