refactor: 添加 websocket 连接认证拦截器实现点对点指定用户发送消息；移除 easy-captcha 替换为 hutool-captcha验证码实现代码简化；重构认证接口控制层代码。

src/test/java/com/youlai/system/controller/WebsocketControllerTest.java

@@ -1,42 +0,0 @@
-package com.youlai.system.controller;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.web.servlet.MockMvc;
-
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
-
-@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
-@AutoConfigureMockMvc
-class WebsocketControllerTest {
-
-    @Autowired
-    private MockMvc mockMvc;
-
-    @Test
-    void testSendToAll() throws Exception {
-        String message = "Hello!  I'm server. This is a topic message.";
-
-        mockMvc.perform(
-                        post("/messages/sendToAll")
-                                .param("message", message)
-                )
-                .andExpect(status().isOk());
-    }
-
-    @Test
-    void testSendToUser() throws Exception {
-
-        Long userId = 2L;// 系统管理员用户ID=2
-
-        mockMvc.perform(post("/messages/sendToUser/{userId}", userId)
-                        .param("message", "Hello!  I'm server. This is a point-to-point message.")
-                )
-                //.content(JSONUtil.toJsonStr(webSocketMessage))
-                //.contentType(MediaType.APPLICATION_JSON))
-                .andExpect(status().isOk());
-    }
-}