feat: 新增公开订单查看接口，无需认证

src/main/java/com/example/building/controller/PublicOrderController.java

@@ -0,0 +1,91 @@
+package com.example.building.controller;
+
+import com.example.building.common.Result;
+import com.example.building.entity.Order;
+import com.example.building.entity.OrderItem;
+import com.example.building.mapper.OrderItemMapper;
+import com.example.building.mapper.OrderMapper;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 公开订单查看控制器
+ * 无需认证，用于客户通过分享链接查看订单
+ */
+@RestController
+@RequestMapping("/api/v1/public")
+public class PublicOrderController {
+
+    @Autowired
+    private OrderMapper orderMapper;
+
+    @Autowired
+    private OrderItemMapper orderItemMapper;
+
+    /**
+     * 通过订单号查询订单详情
+     * 公开接口，无需认证
+     */
+    @GetMapping("/orders/{orderNo}")
+    public Result<Map<String, Object>> getOrderByNo(@PathVariable String orderNo) {
+        // 查询订单
+        Order order = orderMapper.selectOne(
+            new com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<Order>()
+                .eq(Order::getOrderNo, orderNo)
+        );
+
+        if (order == null) {
+            return Result.error("订单不存在");
+        }
+
+        // 查询订单明细
+        List<OrderItem> items = orderItemMapper.selectList(
+            new com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<OrderItem>()
+                .eq(OrderItem::getOrderId, order.getOrderId())
+        );
+
+        // 构建返回数据（只返回公开信息）
+        Map<String, Object> result = new HashMap<>();
+        result.put("orderNo", order.getOrderNo());
+        result.put("status", order.getStatus());
+        result.put("statusText", getStatusText(order.getStatus()));
+        result.put("customerName", order.getCustomerName() != null ? order.getCustomerName() : "散客");
+        result.put("customerPhone", order.getCustomerPhone());
+        result.put("totalAmount", order.getTotalAmount());
+        result.put("discountAmount", order.getDiscountAmount());
+        result.put("actualAmount", order.getActualAmount());
+        result.put("paymentMethod", getPaymentText(order.getPaymentMethod()));
+        result.put("createdAt", order.getCreatedAt());
+        result.put("items", items);
+        result.put("remark", order.getRemark());
+
+        return Result.success(result);
+    }
+
+    private String getStatusText(Integer status) {
+        if (status == null) return "未知";
+        switch (status) {
+            case 0: return "进行中";
+            case 1: return "已完成";
+            case 2: return "已取消";
+            case 3: return "退款中";
+            case 4: return "已退款";
+            case 9: return "退货中";
+            default: return "未知";
+        }
+    }
+
+    private String getPaymentText(String method) {
+        if (method == null) return "-";
+        switch (method) {
+            case "cash": return "现金";
+            case "wechat": return "微信";
+            case "alipay": return "支付宝";
+            default: return method;
+        }
+    }
+}