fix(order): 修复大神无服务包时下单页崩溃（Cannot read properties of null reading 'title'）

- 起因：上一批移除"系统自动生成演示服务包"后，未配置服务包的大神返回空列表，下单页模板直接取 selectedService.title 触发空指针
- 下单页新增 serviceView 安全视图（computed 带兜底对象），模板统一改用 serviceView.title/price/unit，杜绝解引用 null
- 无服务包时按大神基础时薪兜底生成"<品类>基础陪伴服务"，保证仍可下单（价格仍由服务端档案价二次校验）
- 详情页取 services[0] 前先判空，并新增"暂未配置服务项目"空态提示
- 新增回归护栏 null-service-guard.spec.ts（98 套件/677 用例全绿）

pwuniapp/pages/expert/detail.vue

@@ -74,6 +74,12 @@
       <view class="section-card" v-if="isCompanion">
         <view class="sec-title">服务项目</view>
         <view class="service-list">
+          <view
+            v-if="!expert.services || expert.services.length === 0"
+            class="service-empty"
+          >
+            <text class="service-empty-text">该大神暂未配置服务项目，可直接发起基础陪伴预约</text>
+          </view>
           <view
             v-for="srv in expert.services"
             :key="srv.id"
@@ -439,7 +445,9 @@ onLoad(async (query) => {
       photos: snapPhotos,
       services: buildDefaultServices(snapGame, snapPrice)
     };
-    selectedServiceId.value = expert.value.services[0].id;
+    if (expert.value.services && expert.value.services.length > 0) {
+      selectedServiceId.value = expert.value.services[0].id;
+    }
   }
 
   try {
@@ -897,6 +905,20 @@ const submitReportTicket = async () => {
     flex-direction: column;
     gap: 16rpx;
 
+    .service-empty {
+      padding: 28rpx 24rpx;
+      border-radius: 16rpx;
+      background: rgba(255, 255, 255, 0.03);
+      border: 1px dashed rgba(255, 255, 255, 0.12);
+      text-align: center;
+
+      .service-empty-text {
+        font-size: 24rpx;
+        color: #94A3B8;
+        line-height: 1.6;
+      }
+    }
+
     .service-item {
       display: flex;
       justify-content: space-between;

pwuniapp/pages/order/create.vue

@@ -9,10 +9,10 @@
             <text class="expert-name">{{ expert.nickname }}</text>
             <text class="game-tag">{{ expert.game }}</text>
           </view>
-          <text class="service-title">{{ selectedService.title }}</text>
+          <text class="service-title">{{ serviceView.title }}</text>
         </view>
         <view class="price-single">
-          <text class="price-unit">¥{{ selectedService.price }}/{{ selectedService.unit }}</text>
+          <text class="price-unit">¥{{ serviceView.price }}/{{ serviceView.unit }}</text>
         </view>
       </view>
     </view>
@@ -22,11 +22,11 @@
       <view class="stepper-row">
         <view class="stepper-label">
           <text class="label-main">购买时长</text>
-          <text class="label-sub">以{{ selectedService.unit }}为计费单位</text>
+          <text class="label-sub">以{{ serviceView.unit }}为计费单位</text>
         </view>
         <view class="stepper-box">
           <button class="step-btn btn-active" :disabled="hours <= 1" @click="changeHours(-1)">－</button>
-          <text class="step-val">{{ hours }} {{ selectedService.unit }}</text>
+          <text class="step-val">{{ hours }} {{ serviceView.unit }}</text>
           <button class="step-btn btn-active" :disabled="hours >= 10" @click="changeHours(1)">＋</button>
         </view>
       </view>
@@ -314,6 +314,13 @@ const expert = ref({
   services: []
 });
 const selectedService = ref(null);
+// 模板安全视图：即便服务包尚未加载完成，也不会出现 null.title 崩溃
+const serviceView = computed(() => selectedService.value || {
+  id: 'base',
+  title: '同城陪伴基础服务',
+  price: Number(expert.value && expert.value.price) || 35,
+  unit: '小时'
+});
 const hours = ref(2);
 const timeType = ref('NOW');
 const discount = ref(0);
@@ -340,21 +347,43 @@ onLoad(async (query) => {
     const liveExpert = await getCompanionDetail(targetId);
     if (liveExpert) {
       expert.value = liveExpert;
-      if (query && query.serviceId && liveExpert.services) {
-        const s = liveExpert.services.find(srv => String(srv.id) === String(query.serviceId));
+      const services = Array.isArray(liveExpert.services) ? liveExpert.services : [];
+      if (query && query.serviceId) {
+        const s = services.find(srv => String(srv.id) === String(query.serviceId));
         if (s) {
           selectedService.value = s;
-        } else if (liveExpert.services.length > 0) {
-          selectedService.value = liveExpert.services[0];
         }
-      } else if (liveExpert.services && liveExpert.services.length > 0) {
-        selectedService.value = liveExpert.services[0];
+      }
+      if (!selectedService.value && services.length > 0) {
+        selectedService.value = services[0];
+      }
+      // 兜底：大神尚未配置服务包时，按其基础时薪提供"基础陪伴服务"，保证仍可下单
+      // （价格仍以服务端大神档案价为准，createOrder 会二次校验）
+      if (!selectedService.value) {
+        selectedService.value = {
+          id: 'base',
+          title: `${liveExpert.game || '同城陪伴'}基础陪伴服务`,
+          price: Number(liveExpert.price) || 35,
+          unit: '小时',
+          desc: '大神暂未配置服务包，按基础时薪计费'
+        };
       }
     }
   } catch (err) {
     console.warn('[OrderCreate] 获取线上大神详情异常:', err);
   }
 
+  // 极端兜底：详情获取失败时也要保证不会因空服务崩溃
+  if (!selectedService.value) {
+    selectedService.value = {
+      id: 'base',
+      title: '同城陪伴基础服务',
+      price: Number(expert.value.price) || 35,
+      unit: '小时',
+      desc: ''
+    };
+  }
+
   // 加载后台真实可用优惠券
   await loadLiveCoupons();
 });

server/tests/null-service-guard.spec.ts

@@ -0,0 +1,35 @@
+// 已读取AGENTS.md
+import * as fs from 'fs';
+import * as path from 'path';
+
+/**
+ * 第八十二批：服务包为空时的空指针防护。
+ * 背景：移除"系统自动生成演示服务包"后，大神可能没有任何服务包，
+ * 下单页模板直接取 selectedService.title 会崩（Cannot read properties of null）。
+ */
+describe('第八十二批服务包空值防护闸门', () => {
+  const root = path.resolve(__dirname, '../../');
+  const createPage = fs.readFileSync(path.join(root, 'pwuniapp/pages/order/create.vue'), 'utf-8');
+  const detailPage = fs.readFileSync(path.join(root, 'pwuniapp/pages/expert/detail.vue'), 'utf-8');
+
+  it('下单页提供 serviceView 安全视图，模板不再直接解引用 selectedService', () => {
+    expect(createPage).toContain('const serviceView = computed(');
+    expect(createPage).toContain('{{ serviceView.title }}');
+    expect(createPage).toContain('{{ serviceView.price }}');
+    expect(createPage).toContain('{{ serviceView.unit }}');
+    expect(createPage).not.toContain('selectedService.title');
+    expect(createPage).not.toContain('selectedService.price');
+    expect(createPage).not.toContain('selectedService.unit');
+  });
+
+  it('下单页在无服务包时按大神基础时薪兜底，保证仍可下单', () => {
+    expect(createPage).toContain("id: 'base'");
+    expect(createPage).toContain('基础陪伴服务');
+    expect(createPage).toContain('Array.isArray(liveExpert.services) ? liveExpert.services : []');
+  });
+
+  it('详情页取 services[0] 前先判空，并提供空态提示', () => {
+    expect(detailPage).toContain('expert.value.services && expert.value.services.length > 0');
+    expect(detailPage).toContain('该大神暂未配置服务项目');
+  });
+});