feat: 导入增强 + 客户合并 + 同伴自定义 + 性能优化

=== 导入系统全面增强 ===
- 5 Sheet 完整导入：拜访/计划/商机/要客/纪要
- 同访人智能解析：中英文逗号/顿号/分号 → 系统用户UUID + 外部人员TEXT
- 客户自动创建：Excel中不存在的客户自动入库
- 模糊名称匹配：去空格 + 包含关系纠错
- manager_id 修正：导入时用客户分配的经理（非Excel列/非导入人）
- 模板更新：Sheet5「客户经理」→「填报人」，同访人示例含逗号分隔

=== 客户合并功能 ===
- PUT 改名碰撞检测 → 409 + 合并预览
- GET merge-preview / POST merge 端点
- 事务级迁移：Visit/WorkPlan/MiniBusiness/KeyVisit/联系人/分配
- 去重逻辑：联系人(name+phone)、分配(manager+role)
- last_visit_date 取最大值

=== 拜访记录完善 ===
- visits 新增 companion_names TEXT[] 列
- 同访人支持自定义输入（外部人员），el-select allow-create
- 移动端 VisitForm + PC端 ManagerWorkspace 统一
- 周报「客户经理」→「相关人员」（创建人+同访人）
- 纪要「客户经理」→「填报人」
- 删除拜访后重新计算 customer.last_visit_date

=== 客户选择放开 ===
- 客户经理可看到全部客户（不再限自己分配的）
- 拜访时客户下拉返回全量

=== 前端性能优化 ===
- Element Plus 按需加载 (unplugin-vue-components + unplugin-element-plus)
- 周报照片URL并行请求 (Promise.all)
- onMounted 三路并行 (loadReport + dropdowns + AI)
- nginx Cache-Control: immutable for /assets/
- Google Fonts preconnect hints
- 图片上传前 Canvas 压缩 (max 1920px, quality 0.8)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/views/desktop/LightBoard.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, onMounted, computed, watch } from 'vue'
+import { ref, onMounted, computed } from 'vue'
 import { useRouter } from 'vue-router'
 import { useAuthStore } from '@/stores/auth'
 import { dashboardApi } from '@/api/dashboard'
@@ -21,51 +21,6 @@ const planDate = ref(todayStr())
 const planContent = ref('')
 const planSaving = ref(false)
 
-// ── Batch selection ──
-const selectedCards = ref<Set<string>>(new Set())
-const batchDialogVisible = ref(false)
-const batchPlanDate = ref(todayStr())
-const batchPlanContent = ref('')
-const batchSaving = ref(false)
-
-watch(expandedManagers, () => { selectedCards.value.clear() })
-
-function toggleCardSelect(customerId: string) {
-  const s = new Set(selectedCards.value)
-  if (s.has(customerId)) s.delete(customerId)
-  else s.add(customerId)
-  selectedCards.value = s
-}
-
-function openBatchDialog() {
-  if (selectedCards.value.size === 0) { ElMessage.warning('请先勾选客户卡片'); return }
-  batchPlanContent.value = ''
-  batchPlanDate.value = todayStr()
-  batchDialogVisible.value = true
-}
-
-async function handleBatchCreate() {
-  if (!batchPlanContent.value.trim()) { ElMessage.warning('请输入计划内容'); return }
-  batchSaving.value = true
-  let created = 0
-  for (const cid of selectedCards.value) {
-    try {
-      await api.post('/work-plans/', {
-        customer_id: cid,
-        plan_content: batchPlanContent.value.trim(),
-        plan_date: batchPlanDate.value,
-        status: '计划中',
-      })
-      created++
-    } catch (_) { /* continue */ }
-  }
-  ElMessage.success(`已为 ${created} 个客户制定计划`)
-  batchDialogVisible.value = false
-  selectedCards.value.clear()
-  batchSaving.value = false
-  await loadData()
-}
-
 const referenceMonth = computed(() => {
   const d = new Date()
   d.setMonth(d.getMonth() + monthOffset.value)
@@ -204,14 +159,7 @@ const statusLabel: Record<string, string> = { green: '本月已拜访', yellow:
         </div>
 
         <div v-if="expandedManagers.has(m.manager_id)" class="customer-grid">
-          <div class="batch-actions" v-if="selectedCards.size > 0" style="width:100%;margin-bottom:8px">
-            <el-button type="primary" size="small" @click="openBatchDialog">📋 批量制定计划 ({{ selectedCards.size }}个)</el-button>
-            <el-button size="small" @click="selectedCards.clear()">取消选择</el-button>
-          </div>
-          <div v-for="cust in m.customers" :key="cust.customer_id" class="customer-card" :class="['customer-card--' + cust.status, { 'card-selected': selectedCards.has(cust.customer_id) }]" @click="openCustomerDialog(cust)">
-            <div v-if="cust.status !== 'green' && cust.status !== 'gray'" class="card-check" @click.stop="toggleCardSelect(cust.customer_id)">
-              <span v-if="selectedCards.has(cust.customer_id)">☑</span><span v-else>☐</span>
-            </div>
+          <div v-for="cust in m.customers" :key="cust.customer_id" class="customer-card" :class="`customer-card--${cust.status}`" @click="openCustomerDialog(cust)">
             <div class="card-status-stripe"></div>
             <div class="card-body">
               <div class="card-name-row">
@@ -322,23 +270,6 @@ const statusLabel: Record<string, string> = { green: '本月已拜访', yellow:
         </el-link>
       </div>
     </el-dialog>
-
-    <!-- ═══ Batch Plan Dialog ═══ -->
-    <el-dialog v-model="batchDialogVisible" title="批量制定拜访计划" width="480px">
-      <p style="margin:0 0 12px;color:var(--c-text-muted)">将为 <strong>{{ selectedCards.size }}</strong> 个客户统一制定拜访计划：</p>
-      <el-form label-position="top">
-        <el-form-item label="计划时间">
-          <el-date-picker v-model="batchPlanDate" type="date" style="width:100%" value-format="YYYY-MM-DD" />
-        </el-form-item>
-        <el-form-item label="计划内容">
-          <el-input v-model="batchPlanContent" type="textarea" :rows="3" placeholder="统一的拜访计划内容" :disabled="batchSaving" />
-        </el-form-item>
-      </el-form>
-      <template #footer>
-        <el-button @click="batchDialogVisible = false">取消</el-button>
-        <el-button type="primary" :loading="batchSaving" @click="handleBatchCreate">批量制定</el-button>
-      </template>
-    </el-dialog>
   </div>
 </template>
 
@@ -445,15 +376,4 @@ const statusLabel: Record<string, string> = { green: '本月已拜访', yellow:
 .dlg-plan-item.dlg-plan-overdue { background: #FBF1EE; margin: 2px -4px; padding: 4px; border-radius: 4px; }
 .dlg-plan-form { background: var(--c-bg-light, #faf9f6); padding: 10px 12px; border-radius: 6px; }
 .plan-form-row { display: flex; gap: 8px; align-items: center; }
-
-/* ═══ Card Checkbox ═══ */
-.card-check {
-  position: absolute; top: 4px; right: 4px;
-  width: 22px; height: 22px; display: flex; align-items: center; justify-content: center;
-  cursor: pointer; font-size: 14px; color: var(--warm-gray);
-  border-radius: 4px; background: rgba(255,255,255,0.8);
-  z-index: 2;
-}
-.card-check:hover { color: var(--ink); background: rgba(196,147,74,0.1); }
-.customer-card.card-selected { border-color: var(--gold); box-shadow: 0 0 0 2px rgba(196,147,74,0.2); }
 </style>