feat(pl): 调整加油登记列表排序、必填项和顶部汇总区。

按登记日期倒序列表并增加列统计，期初公里数改为必填，车辆统计卡片改为待开发。

Co-authored-by: Cursor <cursoragent@cursor.com>

miniprogram/pages/pl/fuel-register/form.vue

@@ -80,13 +80,14 @@
         </view>
 
         <view class="field">
-          <text class="field-label">期初公里数/KM</text>
+          <text class="field-label">期初公里数/KM<text class="req">*</text></text>
           <input
             class="form-input"
             type="digit"
+            :class="{ error: fieldErr.odometerKm }"
             :value="form.odometerKm"
             :disabled="readonly"
-            placeholder="选填"
+            placeholder="请输入期初公里数"
             @input="onOdometerInput"
           />
         </view>
@@ -267,6 +268,7 @@ const form = reactive({
 const fieldErr = reactive({
   registerDate: false,
   licensePlate: false,
+  odometerKm: false,
   fuelLiters: false
 })
 
@@ -334,6 +336,7 @@ function onDateChange(e) {
 
 function onOdometerInput(e) {
   form.odometerKm = e.detail.value
+  fieldErr.odometerKm = false
 }
 
 function onLitersInput(e) {
@@ -439,6 +442,7 @@ function previewAt(idx) {
 function validate() {
   fieldErr.registerDate = false
   fieldErr.licensePlate = false
+  fieldErr.odometerKm = false
   fieldErr.fuelLiters = false
   if (!form.fuelCategory) {
     uni.showToast({ title: '请选择加油类别', icon: 'none' })
@@ -454,6 +458,18 @@ function validate() {
     uni.showToast({ title: '请选择车牌号', icon: 'none' })
     return false
   }
+  const odoRaw = String(form.odometerKm ?? '').trim()
+  if (!odoRaw) {
+    fieldErr.odometerKm = true
+    uni.showToast({ title: '请输入期初公里数', icon: 'none' })
+    return false
+  }
+  const odo = Number(odoRaw)
+  if (Number.isNaN(odo) || odo < 0) {
+    fieldErr.odometerKm = true
+    uni.showToast({ title: '期初公里数须为非负数字', icon: 'none' })
+    return false
+  }
   const litersRaw = String(form.fuelLiters ?? '').trim()
   if (!litersRaw) {
     fieldErr.fuelLiters = true