feat: 新增管理台模型配置管理功能

- 支持配置类型注册表机制（basic、zhisuan）
- 配置列表展示（生效中/未生效状态区分）
- 新增/编辑配置表单，支持动态字段渲染
- 生效中配置不可编辑/删除限制
- 配置类型创建后不可修改
- 密钥掩码显示与显示/隐藏切换
- 操作二次确认弹窗（设为默认、删除）

src/styles/global.scss

@@ -2878,3 +2878,161 @@ input:checked + .slider:before {
     color: var(--color-danger);
     margin-top: 4px;
 }
+
+/* ============================================
+   模型配置管理页面样式
+   ============================================ */
+
+/* 配置列表页面基础样式 */
+.model-configs-page {
+    padding: 20px 0;
+}
+
+/* 新增/编辑配置页面 */
+.add-model-config-page {
+    padding: 20px 0;
+}
+
+.add-model-config-page .page-header {
+    display: flex;
+    align-items: center;
+    gap: 16px;
+    margin-bottom: 24px;
+}
+
+.add-model-config-page .page-title {
+    font-size: 20px;
+    font-weight: 600;
+    color: #111827;
+    margin: 0;
+    flex: 1;
+}
+
+.add-model-config-page .header-spacer {
+    width: 80px;
+}
+
+.config-form {
+    background: white;
+    border-radius: 8px;
+    border: 1px solid #E5E7EB;
+    padding: 24px;
+}
+
+.config-form .form-section {
+    margin-bottom: 32px;
+}
+
+.config-form .form-section:last-of-type {
+    margin-bottom: 24px;
+}
+
+.config-form .form-section .section-title {
+    font-size: 16px;
+    font-weight: 600;
+    color: #111827;
+    margin-bottom: 20px;
+    padding-bottom: 12px;
+    border-bottom: 1px solid #E5E7EB;
+}
+
+.config-form .form-group {
+    margin-bottom: 20px;
+}
+
+.config-form .form-label {
+    display: block;
+    font-size: 14px;
+    font-weight: 500;
+    color: #374151;
+    margin-bottom: 8px;
+}
+
+.config-form .form-label.required::after {
+    content: ' *';
+    color: #EF4444;
+}
+
+.config-form .form-input,
+.config-form .form-select {
+    width: 100%;
+    padding: 10px 12px;
+    font-size: 14px;
+    border: 1px solid #D1D5DB;
+    border-radius: 6px;
+    background: white;
+    color: #111827;
+    transition: border-color 0.2s, box-shadow 0.2s;
+}
+
+.config-form .form-input:focus,
+.config-form .form-select:focus {
+    outline: none;
+    border-color: #3B82F6;
+    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
+}
+
+.config-form .form-input:disabled,
+.config-form .form-select:disabled {
+    background: #F3F4F6;
+    color: #6B7280;
+    cursor: not-allowed;
+}
+
+.config-form .form-group.has-error .form-input,
+.config-form .form-group.has-error .form-select {
+    border-color: #EF4444;
+}
+
+.config-form .error-message {
+    display: block;
+    font-size: 12px;
+    color: #EF4444;
+    margin-top: 6px;
+}
+
+.config-form .help-text {
+    display: block;
+    font-size: 12px;
+    color: #6B7280;
+    margin-top: 6px;
+}
+
+/* 密码输入框 */
+.password-input-wrapper {
+    position: relative;
+    display: flex;
+    align-items: center;
+}
+
+.password-input-wrapper .form-input {
+    padding-right: 40px;
+}
+
+.password-toggle-btn {
+    position: absolute;
+    right: 8px;
+    top: 50%;
+    transform: translateY(-50%);
+    background: none;
+    border: none;
+    padding: 6px;
+    cursor: pointer;
+    color: #6B7280;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.password-toggle-btn:hover {
+    color: #374151;
+}
+
+/* 表单操作按钮 */
+.config-form .form-actions {
+    display: flex;
+    justify-content: flex-end;
+    gap: 12px;
+    padding-top: 20px;
+    border-top: 1px solid #E5E7EB;
+}