feat: 三项改进 — require_report + 拜访联动 + 解绑移到弹窗

1. 用户管理页 UX 优化:
   - 表格内「解绑」按钮移入编辑弹窗(clearable 输入框)
   - 新增「需要填写周报」el-switch 开关
   - 新增「填报」列显示是否计入统计

2. require_report 字段 (DB + API + 联动):
   - users 表新增 require_report BOOLEAN DEFAULT TRUE
   - 调度器/仪表盘进度/立即检查 均排除 require_report=false
   - UserOut schema + UpdateUserRoleRequest 同步更新

3. 拜访联动客户 last_visit:
   - customers 表新增 last_visit_date / last_visit_manager_id
   - 创建拜访记录时自动更新对应客户的最后拜访信息
   - 亮灯表可据此精确判断客户拜访状态

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

backend/app/api/visits.py

@@ -143,6 +143,14 @@ async def create_visit(
     init_entry(visit, current_user["name"])
     db.add(visit)
 
+    # Update customer's last visit tracking
+    cust_result = await db.execute(select(Customer).where(Customer.id == data.customer_id))
+    customer = cust_result.scalar_one_or_none()
+    if customer:
+        customer.last_visit_date = parse_date(data.visit_date)
+        customer.last_visit_manager_id = uuid.UUID(current_user["user_id"])
+        db.add(customer)
+
     # Create draft copies for companions
     for companion_id in data.companions:
         if companion_id != uuid.UUID(current_user["user_id"]):