feat(ai-chat): 添加 AI 聊天功能及相关 DTO 和控制器

- 新增 `AiChatMessageDTO` 用于处理 AI 聊天消息
- 新增 `AiChatController` 提供 AI 聊天接口，支持普通聊天和网络搜索模式
- 在 `pom.xml` 中添加大模型相关依赖

pigx-upms/pigx-upms-api/src/main/java/com/pig4cloud/pigx/admin/api/dto/AiChatMessageDTO.java

@@ -0,0 +1,23 @@
+package com.pig4cloud.pigx.admin.api.dto;
+
+import lombok.Data;
+
+/**
+ * AI 聊天消息 DTO
+ *
+ * @author lengleng
+ * @date 2025/02/20
+ */
+@Data
+public class AiChatMessageDTO {
+
+    /**
+     * 消息
+     */
+    private String message;
+
+    /**
+     * 网络搜索
+     */
+    private boolean webSearch;
+}

pigx-upms/pigx-upms-biz/pom.xml

@@ -174,6 +174,15 @@
             <groupId>org.dromara.sms4j</groupId>
             <artifactId>sms4j-oa-core</artifactId>
         </dependency>
+        <!-- 大模型相关的配置 -->
+        <dependency>
+            <groupId>io.github.pig-mesh.ai</groupId>
+            <artifactId>deepseek-spring-boot-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.pig4cloud</groupId>
+            <artifactId>pigx-common-sse</artifactId>
+        </dependency>
         <!-- 模板引擎-->
         <dependency>
             <groupId>org.apache.velocity</groupId>

pigx-upms/pigx-upms-biz/src/main/java/com/pig4cloud/pigx/admin/controller/AiChatController.java

@@ -0,0 +1,50 @@
+package com.pig4cloud.pigx.admin.controller;
+
+import com.pig4cloud.pigx.admin.api.dto.AiChatMessageDTO;
+import io.github.pigmesh.ai.deepseek.core.DeepSeekClient;
+import io.github.pigmesh.ai.deepseek.core.chat.ChatCompletionResponse;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Flux;
+
+import java.util.Optional;
+
+/**
+ * AI 聊天控制器
+ *
+ * @author lengleng
+ * @date 2025/02/20
+ */
+@Slf4j
+@RestController
+@RequestMapping("/ai")
+@RequiredArgsConstructor
+public class AiChatController {
+
+    private final Optional<DeepSeekClient> deepSeekClientOptional;
+
+
+    /**
+     * 聊天
+     *
+     * @param message 消息
+     * @return {@link Flux }<{@link ChatCompletionResponse }>
+     */
+    @PostMapping("/chat")
+    public Flux<ChatCompletionResponse> chat(@RequestBody AiChatMessageDTO message) {
+
+        if (deepSeekClientOptional.isEmpty()) {
+            log.warn("DeepSeek 大模型聊天未开启，请检查配置");
+            return Flux.empty();
+        }
+
+        if (message.isWebSearch()) {
+            return deepSeekClientOptional.get().chatSearchCompletion(message.getMessage());
+        }
+        return deepSeekClientOptional.get().chatFluxCompletion(message.getMessage());
+    }
+}