feat: 添加顾客权限控制和订单时间限制

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

@@ -0,0 +1,57 @@
+package com.example.building.controller;
+
+import com.example.building.common.Result;
+import com.example.building.entity.SystemConfig;
+import com.example.building.mapper.SystemConfigMapper;
+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;
+
+/**
+ * 系统配置控制器
+ */
+@RestController
+@RequestMapping("/api/v1/system-config")
+public class SystemConfigController {
+
+    @Autowired
+    private SystemConfigMapper systemConfigMapper;
+
+    /**
+     * 获取所有配置
+     */
+    @GetMapping
+    public Result<Map<String, String>> getAllConfig() {
+        List<SystemConfig> configs = systemConfigMapper.selectList(null);
+        Map<String, String> result = new HashMap<>();
+        for (SystemConfig config : configs) {
+            result.put(config.getConfigKey(), config.getConfigValue());
+        }
+        return Result.success(result);
+    }
+
+    /**
+     * 更新配置
+     */
+    @PutMapping
+    public Result<Void> updateConfig(@RequestBody SystemConfig config) {
+        // 检查是否存在
+        SystemConfig existing = systemConfigMapper.selectOne(
+            new com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<SystemConfig>()
+                .eq(SystemConfig::getConfigKey, config.getConfigKey())
+        );
+        
+        if (existing != null) {
+            existing.setConfigValue(config.getConfigValue());
+            existing.setRemark(config.getRemark());
+            systemConfigMapper.updateById(existing);
+        } else {
+            config.setConfigId(java.util.UUID.randomUUID().toString());
+            systemConfigMapper.insert(config);
+        }
+        return Result.success();
+    }
+}