调整多模态支持

backend-java/src/main/java/com/pharmacopoeia/controller/ChatController.java

@@ -17,8 +17,6 @@ import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.util.*;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
 @RestController
@@ -449,14 +447,15 @@ public class ChatController {
                     .data("📚 检索药典知识库...").build());
         }
 
-        String query = request.getMessage() != null ? request.getMessage().trim() : "";
-        if (!query.isEmpty() && !ocrText.isEmpty()) {
-            query = query + "\n\n（" + mediaLabel + "OCR提取内容：" + ocrText + "）";
+        String rawQuery = request.getMessage() != null ? request.getMessage().trim() : "";
+        if (!rawQuery.isEmpty() && !ocrText.isEmpty()) {
+            rawQuery = rawQuery + "\n\n（" + mediaLabel + "OCR提取内容：" + ocrText + "）";
         } else if (!ocrText.isEmpty()) {
-            query = ocrText;
-        } else if (query.isEmpty()) {
-            query = "请介绍一下自己";
+            rawQuery = ocrText;
+        } else if (rawQuery.isEmpty()) {
+            rawQuery = "请介绍一下自己";
         }
+        final String query = rawQuery;
 
         final String intent = retrieverService.classifyIntent(query);
         sink.tryEmitNext(ServerSentEvent.<String>builder().event("intent").data(intent).build());