feat(dify): 集成 Dify 服务并更新相关配置

- 在 application.yml 中添加 Dify 服务相关配置
- 删除 PageDto 类
- 更新 pom.xml，升级 mybatis-plus 版本并添加 dify-spring-boot-starter 依赖
- 调整 SpringSecurityConfig 中的请求匹配规则

src/main/java/com/zsc/edu/dify/modules/dify/controller/V1ChatController.java

@@ -0,0 +1,44 @@
+package com.zsc.edu.dify.modules.dify.controller;
+
+import com.zsc.edu.dify.modules.dify.service.DifyChatService;
+import io.github.guoshiqiufeng.dify.chat.dto.request.ChatMessageSendRequest;
+import io.github.guoshiqiufeng.dify.chat.dto.request.MessageConversationsRequest;
+import io.github.guoshiqiufeng.dify.chat.dto.response.ChatMessageSendCompletionResponse;
+import io.github.guoshiqiufeng.dify.chat.dto.response.MessageConversationsResponse;
+import io.github.guoshiqiufeng.dify.core.pojo.DifyPageResult;
+import jakarta.annotation.Resource;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.*;
+import reactor.core.publisher.Flux;
+
+/**
+ * @author yanghq
+ * @version 1.0
+ * @since 2025/3/25 10:48
+ */
+@RestController
+@RequestMapping("/v1/chat")
+public class V1ChatController {
+
+    @Resource
+    private DifyChatService difyChatService;
+
+    /**
+     * 发送消息（流式）
+     *
+     * @param sendRequest 消息参数 （可以自定义参数，调用 difyChat 实例时重新组装即可），
+     *                    用户 id可以改为从上下文（token）获取，
+     *                    apikey 建议在数据库进行存储，前端调用时传智能体 id，从数据库查询
+     */
+    @PostMapping(value = "/completions", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
+    public Flux<ChatMessageSendCompletionResponse> sendChatMessageStream(@RequestBody ChatMessageSendRequest sendRequest) {
+        return difyChatService.sendChatMessageStream(sendRequest);
+    }
+
+
+    @GetMapping("/conversations")
+    public DifyPageResult<MessageConversationsResponse> conversations(@RequestBody MessageConversationsRequest request) {
+        return difyChatService.conversations(request);
+    }
+
+}

src/main/java/com/zsc/edu/dify/modules/dify/service/DifyChatService.java

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+package com.zsc.edu.dify.modules.dify.service;
+
+import io.github.guoshiqiufeng.dify.chat.DifyChat;
+import io.github.guoshiqiufeng.dify.chat.dto.request.ChatMessageSendRequest;
+import io.github.guoshiqiufeng.dify.chat.dto.request.MessageConversationsRequest;
+import io.github.guoshiqiufeng.dify.chat.dto.response.ChatMessageSendCompletionResponse;
+import io.github.guoshiqiufeng.dify.chat.dto.response.MessageConversationsResponse;
+import io.github.guoshiqiufeng.dify.core.pojo.DifyPageResult;
+import jakarta.annotation.Resource;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+
+/**
+ * @author yanghq
+ * @version 1.0
+ * @since 2025/3/25 10:48
+ */
+@Slf4j
+@Service
+public class DifyChatService {
+
+    @Resource
+    private DifyChat difyChat;
+
+    public Flux<ChatMessageSendCompletionResponse> sendChatMessageStream(ChatMessageSendRequest sendRequest) {
+        // 可以进行自定义逻辑处理：参数转换、权限校验等
+        return difyChat.sendChatMessageStream(sendRequest);
+    }
+
+    public DifyPageResult<MessageConversationsResponse> conversations(MessageConversationsRequest request) {
+        return difyChat.conversations(request);
+    }
+
+}