style(ui): 优化表单选择器样式和代码清理

添加表单选择器的占位符和选中状态样式
移除未使用的Loading组件和RectLeft图标
清理未使用的themeVars变量

@@ -22,7 +22,6 @@ declare module 'vue' {
     NutFormItem: typeof import('@nutui/nutui-taro')['FormItem']
     NutImagePreview: typeof import('@nutui/nutui-taro')['ImagePreview']
     NutInput: typeof import('@nutui/nutui-taro')['Input']
-    NutLoading: typeof import('@nutui/nutui-taro')['Loading']
     NutMenu: typeof import('@nutui/nutui-taro')['Menu']
     NutMenuItem: typeof import('@nutui/nutui-taro')['MenuItem']
     NutOverlay: typeof import('@nutui/nutui-taro')['Overlay']

 <!--
  * @Date: 2022-09-19 14:11:06
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-07-16 10:22:06
+ * @LastEditTime: 2025-07-17 14:01:28
  * @FilePath: /jgdl/src/pages/authCar/index.vue
  * @Description: 认证车源
 -->
@@ -51,7 +51,7 @@
                 </view>
                 <text class="font-medium text-sm block">{{ car.brand }} {{ car.model }}</text>
                 <text class="text-xs text-gray-600 mt-1 block">
-                  {{ car.manufacture_year }} ·
+                  <!-- {{ car.manufacture_year }} · -->
                   <text v-if="car.range_km">续航{{ car.range_km }}km</text>
                   <text v-if="car.max_speed_kmh"> 最高时速{{ car.max_speed_kmh }}km/h</text>
                 </text>

@@ -140,6 +140,15 @@
     margin-right: 16rpx;
 }
 
+.form-value-placeholder {
+    color: #9ca3af; /* 浅色 - 占位符文字 */
+}
+
+.form-value-selected {
+    color: #374151; /* 深色 - 选中值文字 */
+    font-weight: 500;
+}
+
 .arrow-icon {
     color: #9ca3af;
 }

@@ -128,7 +128,7 @@
                     <!-- 品牌型号选择（新版） -->
                     <nut-form-item label-position="top" label="品牌型号选择" prop="brandModel">
                         <view class="form-item-content" @click="showBrandModelPicker">
-                            <text class="form-value">
+                            <text class="form-value" :class="{ 'form-value-selected': formData.brand && formData.model, 'form-value-placeholder': !(formData.brand && formData.model) }">
                                 {{ formData.brand && formData.model ? `${formData.brand} ${formData.model}` : '请选择品牌型号' }}
                             </text>
                             <Right class="arrow-icon" />
@@ -320,7 +320,7 @@
 
 <script setup>
 import { ref, reactive, onMounted } from 'vue'
-import { Plus, Right, Location, Close, RectLeft } from '@nutui/icons-vue-taro'
+import { Plus, Right, Location, Close } from '@nutui/icons-vue-taro'
 import Taro from '@tarojs/taro'
 import BASE_URL from '@/utils/config';
 import BrandModelPicker from '@/components/BrandModelPicker.vue'
@@ -331,11 +331,6 @@ import './index.less'
 import { addVehicleAPI, editVehicleAPI, getVehicleDetailAPI } from '@/api/car';
 import { getSchoolsAPI, getBrandsModelsAPI } from '@/api/other';
 
-const themeVars = ref({
-    navbarBackground: '#fb923c',
-    navbarColor: '#ffffff',
-})
-
 /**
  * 返回上一页
  */

@@ -141,6 +141,15 @@
     margin-right: 16rpx;
 }
 
+.form-value-placeholder {
+    color: #9ca3af; /* 浅色 - 占位符文字 */
+}
+
+.form-value-selected {
+    color: #374151; /* 深色 - 选中值文字 */
+    font-weight: 500;
+}
+
 .arrow-icon {
     color: #9ca3af;
 }

 <!--
  * @Date: 2022-09-19 14:11:06
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-07-17 10:36:52
+ * @LastEditTime: 2025-07-17 14:20:06
  * @FilePath: /jgdl/src/pages/setAuthCar/index.vue
  * @Description: 申请认证
 -->
@@ -90,9 +90,8 @@
                     <nut-form-item label-position="top" label="品牌型号选择" prop="brandModel" required
                         :rules="[{ required: true, message: '请选择品牌型号' }]">
                         <view class="form-item-content" @click="showBrandModelPicker">
-                            <text class="form-value">
-                                {{ formData.brand && formData.model ? `${formData.brand} ${formData.model}` : '请选择品牌型号'
-                                }}
+                            <text class="form-value" :class="{ 'form-value-selected': formData.brand && formData.model, 'form-value-placeholder': !(formData.brand && formData.model) }">
+                                {{ formData.brand && formData.model ? `${formData.brand} ${formData.model}` : '请选择品牌型号' }}
                             </text>
                             <Right class="arrow-icon" />
                         </view>