feat(chat): 新增聊天润色与向量搜索接口

- ChatController 提供 /chat/talk SSE 流式对话，融合 LLM 输出与 Qdrant 向量检索
- 新增 ChatReq、ChatStreamMessage 等 DTO 与 Service 骨架
- 调整向量维度与集合名称，开放跨域并补充错误码

src/main/java/com/yolo/keyborad/controller/ChatController.java

@@ -0,0 +1,104 @@
+package com.yolo.keyborad.controller;
+
+import cn.dev33.satoken.stp.StpUtil;
+import com.yolo.keyborad.model.dto.chat.ChatReq;
+import com.yolo.keyborad.model.dto.chat.ChatStreamMessage;
+import com.yolo.keyborad.model.entity.KeyboardCharacter;
+import com.yolo.keyborad.service.KeyboardCharacterService;
+import com.yolo.keyborad.service.impl.QdrantVectorService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.annotation.Resource;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.ai.chat.client.ChatClient;
+import org.springframework.ai.openai.OpenAiChatOptions;
+import org.springframework.ai.openai.OpenAiEmbeddingModel;
+import org.springframework.boot.context.properties.bind.DefaultValue;
+import org.springframework.http.codec.ServerSentEvent;
+import org.springframework.web.bind.annotation.*;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import reactor.core.scheduler.Schedulers;
+
+/*
+ * @author: ziin
+ * @date: 2025/12/8 15:05
+ */
+@RestController
+@RequestMapping("/chat")
+@Slf4j
+@CrossOrigin
+@Tag(name = "聊天", description = "聊天接口")
+public class ChatController {
+
+    @Resource
+    private ChatClient client;
+
+    @Resource
+    private OpenAiEmbeddingModel embeddingModel;
+
+    @Resource
+    private QdrantVectorService qdrantVectorService;
+
+    @Resource
+    private KeyboardCharacterService keyboardCharacterService;
+
+
+    @PostMapping("/talk")
+    @Operation(summary = "聊天润色接口", description = "聊天润色接口")
+    @Parameter(name = "userInput",required = true,description = "测试聊天接口",example = "talk to something")
+    public Flux<ServerSentEvent<ChatStreamMessage>> testTalk(@RequestBody ChatReq chatReq){
+
+        KeyboardCharacter character = keyboardCharacterService.getById(chatReq.getCharacterId());
+
+        // 1. LLM 流式输出
+        Flux<ChatStreamMessage> llmFlux = client
+                .prompt(character.getPrompt() +
+                        "\nUser message: %s".formatted(chatReq.getMessage()))
+                .system("""
+                Format rules:
+                - Return EXACTLY 3 replies.
+                - Use "<SPLIT>" as the separator.
+                - reply1<SPLIT>reply2<SPLIT>reply3
+            """)
+                .user(chatReq.getMessage())
+                .options(OpenAiChatOptions.builder()
+                        .user(StpUtil.getLoginIdAsString())
+                        .build())
+                .stream()
+                .content()
+                .map(chunk -> new ChatStreamMessage("llm_chunk", chunk));
+
+        // 2. 向量搜索Flux（一次性发送搜索结果）
+        Flux<ChatStreamMessage> searchFlux = Mono
+                .fromCallable(() -> qdrantVectorService.searchText(chatReq.getMessage()))
+                .subscribeOn(Schedulers.boundedElastic()) // 避免阻塞 event-loop
+                .map(list -> new ChatStreamMessage("search_result", list))
+                .flux();
+        // 3. 结束标记
+        Flux<ChatStreamMessage> doneFlux =
+                Flux.just(new ChatStreamMessage("done", null));
+
+        // 4. 合并所有Flux
+        Flux<ChatStreamMessage> merged =
+                Flux.merge(llmFlux, searchFlux)
+                        .concatWith(doneFlux);
+
+        // 5. SSE 包装
+        return merged.map(msg ->
+                ServerSentEvent.builder(msg)
+                        .event(msg.getType())
+                        .build()
+        );
+    }
+
+
+    @PostMapping("/save_embed")
+    @Operation(summary = "保存润色后的句子", description = "保存润色后的句子")
+    @Parameter(name = "userInput",required = true,description = "测试聊天接口",example = "talk to something")
+    public Flux<String> testTalkWithVector(@RequestBody ChatReq chatReq) {
+
+        return null;
+    }
+}

src/main/java/com/yolo/keyborad/controller/DemoController.java

@@ -62,8 +62,6 @@ public class DemoController {
     @Operation(summary = "测试聊天接口", description = "测试接口")
     @Parameter(name = "userInput",required = true,description = "测试聊天接口",example = "talk to something")
     public Flux<String> testTalk(@DefaultValue("you are so cute!") String userInput){
-        String delimiter = "/t";
-
         return client
                 .prompt("""
             You're a 25-year-old guy—witty and laid-back, always replying in English.
@@ -83,7 +81,7 @@ public class DemoController {
             """)
                 .user(userInput)
                 .options(OpenAiChatOptions.builder()
-                        .user(StpUtil.getLoginIdAsString())  // ✅ 这里每次请求都会重新取当前登录用户
+                        .user(StpUtil.getLoginIdAsString())// ✅ 这里每次请求都会重新取当前登录用户
                         .build())
                 .stream()
                 .content();
@@ -99,12 +97,6 @@ public class DemoController {
     }
 
 
-    @Operation(summary = "IOS内购凭证校验", description = "IOS内购凭证校验")
-    public BaseResponse<String> iosPay(@RequestBody IosPayVerifyReq req) {
-
-        return null;
-    }
-
     @PostMapping("/testSaveEmbed")
     @Operation(summary = "测试存储向量接口", description = "测试存储向量接口")
     @Parameter(name = "userInput",required = true,description = "测试存储向量接口")