feat: 添加线索引擎、NLQ、场景检测、前端界面等核心功能模块

backend/app/clues/models.py

@@ -82,8 +82,8 @@ class Clue(Base):
     amount_involved: Mapped[float | None] = mapped_column(Float, nullable=True)
 
     assignee: Mapped[str | None] = mapped_column(String(64), nullable=True)
-    # 误报/属实反馈（R18 反馈学习）
-    feedback: Mapped[str | None] = mapped_column(String(16), nullable=True)  # confirmed/false_positive
+    feedback: Mapped[str | None] = mapped_column(String(16), nullable=True)
+    """误报/属实反馈（R18 反馈学习）：confirmed / false_positive"""
 
     # 可追溯：产生该线索时的模型/规则/数据版本（R19 三重留痕）
     model_version: Mapped[str | None] = mapped_column(String(64), nullable=True)

backend/app/clues/service.py

@@ -132,7 +132,10 @@ def assign(session: Session, clue: Clue, assignee: str, actor: str) -> Clue:
     session.flush()
     if clue.status == ClueStatus.NEW:
         transition(session, clue, ClueStatus.ASSIGNED, actor, f"分派给 {assignee}")
-    audit.record(session, actor, "assign_clue", target_type="clue", target_id=str(clue.id), detail={"assignee": assignee})
+    audit.record(
+        session, actor, "assign_clue",
+        target_type="clue", target_id=str(clue.id), detail={"assignee": assignee},
+    )
     return clue