feat(specialist): 分页查询接口支持分页参数

- 引入 FindPageDto 用于分页参数传递
- 修改分页接口参数类型为 FindPageDto
- 调用 service 层时传入页码参数
-保持返回结果结构不变，仅调整分页逻辑

src/main/java/com/whdc/controller/SpecialistController.java

@@ -1,5 +1,7 @@
 package com.whdc.controller;
 
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.whdc.model.dto.FindPageDto;
 import com.whdc.model.entity.Specialist;
 import com.whdc.model.group.Insert;
 import com.whdc.model.group.Update;
@@ -11,8 +13,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
-import java.util.List;
-
 /**
  * 专家通讯录控制器
  *
@@ -30,8 +30,8 @@ public class SpecialistController {
 
     @ApiOperation(value = "分页查询")
     @PostMapping(value = "page")
-    public ResultJson<List<Specialist>> page(@RequestBody Specialist dto) {
+    public ResultJson<IPage<Specialist>> page(@RequestBody FindPageDto dto) {
-        return ResultJson.ok(specialistService.list());
+        return ResultJson.ok(specialistService.page(dto.getPage()));
     }
 
     @ApiOperation(value = "新增")