细节优化

backend/app/services/kb_service.py

@@ -1,5 +1,7 @@
 """知识库服务：CRUD + Token 管理 + 默认目录树。"""
 
+from datetime import datetime
+
 from app.core.errors import NotFoundError, PermissionDeniedError
 from app.core.logging import get_logger
 from app.models.document_category import DocumentCategory
@@ -33,6 +35,10 @@ class KnowledgeBaseService:
             token_encrypted=token_encrypted,
             token_hint=token_hint,
         )
+        # AI 链接默认 30 分钟有效期
+        from datetime import datetime, timedelta
+
+        kb.token_expires_at = (datetime.now() + timedelta(minutes=30)).strftime("%Y-%m-%d %H:%M:%S")
         self._seed_default_categories(kb.id)
         self._session.commit()
         return kb, token
@@ -40,7 +46,7 @@ class KnowledgeBaseService:
     def _seed_default_categories(self, kb_id: str) -> None:
         """创建默认目录树结构。"""
         default_tree = [
-            ("01 公司层", ["公司基本信息", "经营理念", "四大价值", "A/M/B三态"]),
+            ("01 公司层", ["公司基本信息", "经营理念", "四大价值"]),
             ("02 战略层", ["公司战略", "客户战略", "AI战略", "产品战略"]),
             ("03 部门层", ["企划", "技术", "交付", "市场"]),
             ("04 岗位/AI角色", []),
@@ -97,39 +103,14 @@ class KnowledgeBaseService:
         return kb
 
     def delete(self, kb_id: str, user: User) -> None:
+        """删除知识库 → 进回收站（3 天后自动彻底删除）。"""
         kb = self.get_or_404(kb_id, user)
         self._kb_repo.delete(kb)
-        self._cleanup_kb_files(kb)
+        kb.deleted_at = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
         self._session.commit()
 
-    def _cleanup_kb_files(self, kb: KnowledgeBase) -> None:
-        """物理删除知识库下所有文档的原始文件与 Markdown 文件（软删后调用）。
-
-        文件删除失败不阻塞删除流程（记录日志，可由后续清理兜底）。
-        """
-        from sqlalchemy import select
-
-        from app.models.document import Document
-        from app.storage.local_storage import get_storage
-
-        stmt = select(Document).where(Document.knowledge_base_id == kb.id)
-        docs = list(self._session.scalars(stmt).all())
-        storage = get_storage()
-        removed = 0
-        for doc in docs:
-            for key in (doc.storage_path, doc.markdown_path):
-                if not key:
-                    continue
-                try:
-                    storage.delete(key)
-                    removed += 1
-                except Exception as exc:  # noqa: BLE001
-                    logger.warning("清理文件失败 key=%s: %s", key, exc)
-        if removed:
-            logger.info("KB %s 软删，已物理清理 %d 个文件", kb.id, removed)
-
     def regenerate_token(self, kb_id: str, user: User) -> tuple[KnowledgeBase, str]:
-        """重新生成 Token。旧链接立即失效。"""
+        """重新生成 Token。旧链接立即失效，新链接默认 30 分钟有效期。"""
         kb = self.get_or_404(kb_id, user)
         token, token_hash, token_encrypted, token_hint = self._token_svc.create_token_pair()
         self._kb_repo.update(
@@ -138,6 +119,7 @@ class KnowledgeBaseService:
             token_encrypted=token_encrypted,
             token_hint=token_hint,
         )
+        kb.token_expires_at = (datetime.now() + timedelta(minutes=30)).strftime("%Y-%m-%d %H:%M:%S")
         self._session.commit()
         return kb, token
 
@@ -149,7 +131,7 @@ class KnowledgeBaseService:
 
     def set_expiry(self, kb_id: str, user: User, expires_in_minutes: int | None) -> KnowledgeBase:
         """设置链接有效期。None = 长期有效；负数表示已过期（测试用）。"""
-        from datetime import datetime, timedelta
+        from datetime import timedelta
 
         kb = self.get_or_404(kb_id, user)
         if expires_in_minutes is None: