fix: adapt intent recognition to upstream v1.6.0 API changes

- Remove message history round-limit for intent recognition context
- Add db_schema guard in choose_table_schema() to skip RAG when
  guess_tables already set schema
- Delay init_messages() when intent recognition is enabled
- Fix init_messages() calls to pass required session parameter (v1.6.0)
- Add i18n labels for RECOGNIZE_INTENT and GENERATE_CLARIFICATION
  in zh-CN, en, ko-KR

Author: WainWong

backend/apps/chat/task/llm.py

@@ -329,10 +329,9 @@ def init_intent_messages(self, session: Session):
             )
         ))
 
-        # 2. 历史消息（限制数量，仿照 sql_message）
-        count_limit = 0 - base_message_count_limit
+        # 2. 历史消息（不限轮次，使用全部历史以保持意图识别上下文完整）
         if last_messages is not None and len(last_messages) > 0:
-            for msg in last_messages[count_limit:]:
+            for msg in last_messages:
                 if msg.get('type') == 'human':
                     self.intent_message.append(HumanMessage(content=msg.get('content')))
                 elif msg.get('type') == 'ai':
@@ -678,6 +677,9 @@ def filter_training_template(self, _session: Session, oid: int = None, ds_id: in
                                                                       full_message=example_list)
 
     def choose_table_schema(self, _session: Session):
+        # 如果 db_schema 已设置（如意图识别的 guess_tables），跳过 RAG 搜索
+        if self.chat_question.db_schema:
+            return
         self.current_logs[OperationEnum.CHOOSE_TABLE] = start_log(session=_session,
                                                                   operate=OperationEnum.CHOOSE_TABLE,
                                                                   record_id=self.record.id,
@@ -1421,7 +1423,9 @@ def run_task(self, in_chat: bool = True, stream: bool = True,
 
                 self.filter_custom_prompts(_session, CustomPromptTypeEnum.GENERATE_SQL, oid, ds_id)
 
-                self.init_messages(_session)
+                # 意图识别启用时，延迟到意图识别完成后再 init_messages
+                if not settings.INTENT_RECOGNITION_ENABLED:
+                    self.init_messages(_session)
 
             # return id
             if in_chat:
@@ -1456,15 +1460,15 @@ def run_task(self, in_chat: bool = True, stream: bool = True,
                         self._intent_result['guess_tables']
                     )
                     # 重新初始化消息，使用更新后的 db_schema
-                    self.init_messages()
+                    self.init_messages(_session)
                 elif not self.chat_question.db_schema:
                     # fallback: 如果没有 guess_tables 且 db_schema 未设置，走原 RAG 流程
                     self.chat_question.db_schema = get_table_schema(
                         session=_session, current_user=self.current_user, ds=self.ds,
                         question=self.chat_question.question
                     )
                     # 重新初始化消息，使用更新后的 db_schema
-                    self.init_messages()
+                    self.init_messages(_session)
             # ===== 意图识别结束 =====
 
                 # select datasource if datasource is none

frontend/src/i18n/en.json

@@ -741,7 +741,9 @@
       "FILTER_SQL_EXAMPLE": "Match SQL Examples",
       "FILTER_CUSTOM_PROMPT": "Match Custom Prompts",
       "EXECUTE_SQL": "Execute SQL",
-      "GENERATE_PICTURE": "Generate Picture"
+      "GENERATE_PICTURE": "Generate Picture",
+      "RECOGNIZE_INTENT": "Recognize Intent",
+      "GENERATE_CLARIFICATION": "Generate Clarification"
     }
   },
   "about": {

frontend/src/i18n/ko-KR.json

@@ -741,7 +741,9 @@
       "FILTER_SQL_EXAMPLE": "SQL 예시 매칭",
       "FILTER_CUSTOM_PROMPT": "사용자 정의 프롬프트 매칭",
       "EXECUTE_SQL": "SQL 실행",
-      "GENERATE_PICTURE": "이미지 생성"
+      "GENERATE_PICTURE": "이미지 생성",
+      "RECOGNIZE_INTENT": "의도 인식",
+      "GENERATE_CLARIFICATION": "명확화 질문 생성"
     }
   },
   "about": {

frontend/src/i18n/zh-CN.json

@@ -741,7 +741,9 @@
       "FILTER_SQL_EXAMPLE": "匹配 SQL 示例",
       "FILTER_CUSTOM_PROMPT": "匹配自定义提示词",
       "EXECUTE_SQL": "执行 SQL",
-      "GENERATE_PICTURE": "生成图片"
+      "GENERATE_PICTURE": "生成图片",
+      "RECOGNIZE_INTENT": "识别意图",
+      "GENERATE_CLARIFICATION": "生成澄清问题"
     }
   },
   "about": {