fix: user

backend/app/rules/transit_rules.py

@@ -51,7 +51,8 @@ def is_fee_tolerant_transit_pair(tx_a: TransactionRecord, tx_b: TransactionRecor
     amount_b = float(tx_b.amount or 0)
     if amount_a <= 0 or amount_b <= 0:
         return False
-    if _amount_ratio_diff(amount_a, amount_b) > FEE_TOLERANCE_RATIO:
+    diff_ratio = _amount_ratio_diff(amount_a, amount_b)
+    if diff_ratio > FEE_TOLERANCE_RATIO:
         return False
 
     time_a = tx_a.trade_time
@@ -59,7 +60,8 @@ def is_fee_tolerant_transit_pair(tx_a: TransactionRecord, tx_b: TransactionRecor
     if not isinstance(time_a, datetime) or not isinstance(time_b, datetime):
         return False
     try:
-        return abs((time_a - time_b).total_seconds()) <= FEE_TRANSIT_WINDOW_SECONDS
+        seconds_gap = abs((time_a - time_b).total_seconds())
+        return seconds_gap <= FEE_TRANSIT_WINDOW_SECONDS
     except TypeError:
         return False
 

backend/app/schemas/report.py

@@ -13,6 +13,7 @@ class ReportCreate(CamelModel):
     include_timeline: bool = True
     include_reasons: bool = True
     include_inquiry: bool = False
+    include_record_qa: bool = False
 
 
 class ReportOut(CamelModel):

backend/app/services/assessment_service.py

@@ -15,7 +15,7 @@ logger = logging.getLogger(__name__)
 
 
 async def assess_case(case_id: UUID, db: AsyncSession) -> list[FraudAssessment]:
-    """Run rule-based assessment on all non-duplicate transactions and replace old results."""
+    """Run rule-based assessment and replace old results."""
     # Replace mode: rerun analysis for the same case should overwrite prior assessments
     # instead of appending duplicated rows.
     await db.execute(
@@ -26,23 +26,40 @@ async def assess_case(case_id: UUID, db: AsyncSession) -> list[FraudAssessment]:
     result = await db.execute(
         select(TransactionRecord)
         .where(TransactionRecord.case_id == case_id)
-        .where(TransactionRecord.is_duplicate.is_(False))
         .order_by(TransactionRecord.trade_time.asc())
     )
     transactions = list(result.scalars().all())
 
     assessments: list[FraudAssessment] = []
     for tx in transactions:
-        level, reason, exclude_reason = classify_transaction(tx)
+        if tx.is_duplicate:
+            level = ConfidenceLevel.low
+            reason = "该笔交易在交易归并中已标记为重复记录，属于同一笔交易的重复展示。"
+            exclude_reason = "交易归并已判定重复（订单号一致或人工标记为重复），不重复计入被骗金额。"
+            review_status = ReviewStatus.rejected
+            assessed_amount = 0
+        elif tx.is_transit:
+            level = ConfidenceLevel.low
+            reason = (
+                f"该笔交易在交易归并中已标记为中转（{tx.source_app.value} -> {tx.counterparty_name}），"
+                "属于本人账户间资金流转。"
+            )
+            exclude_reason = "交易归并已判定中转（本人账户间互转），不直接计入被骗金额。"
+            review_status = ReviewStatus.rejected
+            assessed_amount = 0
+        else:
+            level, reason, exclude_reason = classify_transaction(tx)
+            review_status = ReviewStatus.pending
+            assessed_amount = float(tx.amount) if level != ConfidenceLevel.low else 0
 
         fa = FraudAssessment(
             case_id=case_id,
             transaction_id=tx.id,
             confidence_level=level,
-            assessed_amount=float(tx.amount) if level != ConfidenceLevel.low else 0,
+            assessed_amount=assessed_amount,
             reason=reason,
             exclude_reason=exclude_reason,
-            review_status=ReviewStatus.pending,
+            review_status=review_status,
         )
         db.add(fa)
         assessments.append(fa)

backend/app/services/report_service.py

@@ -102,6 +102,27 @@ def _mask_text(value: str, keep: int = 12) -> str:
     return f"{text[:keep]}..."
 
 
+def _build_record_qa_draft(transactions: list[TransactionRecord], assessment_by_tx: dict) -> str:
+    candidates = [tx for tx in transactions if not tx.is_duplicate]
+    if not candidates:
+        return "问：具体的转账信息？\n答：目前暂无可确认的转账信息。"
+
+    candidates = sorted(candidates, key=lambda x: x.trade_time or datetime.min)
+    lines: list[str] = []
+    for idx, tx in enumerate(candidates, 1):
+        fa = assessment_by_tx.get(tx.id)
+        status = fa.review_status.value if fa else "pending"
+        cp_account = f"，对方账号{tx.counterparty_account}" if tx.counterparty_account else ""
+        order_no = f"，订单号{tx.order_no}" if tx.order_no else ""
+        remark = f"，备注“{tx.remark}”" if tx.remark else ""
+        lines.append(
+            f"第{idx}笔是{_fmt_dt(tx.trade_time, with_seconds=True)}通过{tx.source_app.value}"
+            f"{'转出' if tx.direction.value == 'out' else '转入'}人民币{float(tx.amount):,.2f}元至{tx.counterparty_name}"
+            f"{cp_account}{order_no}{remark}，当前认定状态为{status}。"
+        )
+    return "问：具体的转账信息？\n答：" + "".join(lines)
+
+
 async def _build_report_dataset(case_id: UUID, db: AsyncSession) -> dict:
     case_obj = await db.get(Case, case_id)
     transactions = await _get_all_transactions(case_id, db)
@@ -245,6 +266,14 @@ async def _gen_excel(case_id: UUID, report_dir: Path, body: ReportCreate, db: As
             ws4.append([i, s])
         sheet_created = True
 
+    if body.include_record_qa:
+        ws5 = wb.active if not sheet_created else wb.create_sheet()
+        ws5.title = "笔录问答草稿"
+        ws5.append(["问答内容"])
+        dataset = await _build_report_dataset(case_id, db)
+        ws5.append([_build_record_qa_draft(dataset["transactions"], dataset["assessment_by_tx"])])
+        sheet_created = True
+
     if not sheet_created:
         ws = wb.active
         ws.title = "报告"
@@ -482,6 +511,15 @@ async def _gen_pdf(case_id: UUID, report_dir: Path, body: ReportCreate, db: Asyn
             elements.append(Paragraph(f"{i}. {s}", normal_style))
         elements.append(Spacer(1, 8 * mm))
 
+    # Section 9: record QA draft
+    if body.include_record_qa:
+        elements.append(Paragraph("笔录问答草稿", h2_style))
+        elements.append(Spacer(1, 4 * mm))
+        qa_text = _build_record_qa_draft(transactions, assessment_by_tx)
+        for line in qa_text.split("\n"):
+            elements.append(Paragraph(line, normal_style))
+        elements.append(Spacer(1, 8 * mm))
+
     if not elements or len(elements) <= 2:
         elements.append(Paragraph("未选择任何报告内容。", normal_style))