feat: 围栏Tab布局重构、低精度过滤、蓝牙考勤去重、考勤删除API

- 围栏管理页面Tab移至顶部，设备绑定Tab隐藏地图全屏展示绑定矩阵
- 位置追踪新增"低精度"按钮，隐藏LBS/WiFi点(地图+折线+表格联动)
- 移除LBS/WiFi精度半径圆圈，仅通过标记颜色区分定位类型
- 蓝牙打卡(0xB2)自动创建考勤记录，含去重和WebSocket广播
- 新增考勤批量删除和单条删除API
- fence_checker补充json导入

via [HAPI](https://hapi.run)

Co-Authored-By: HAPI <noreply@hapi.run>

app/routers/attendance.py

@@ -192,6 +192,36 @@ async def device_attendance(
     )
 
 
+@router.post(
+    "/batch-delete",
+    response_model=APIResponse[dict],
+    summary="批量删除考勤记录 / Batch delete attendance records",
+)
+async def batch_delete_attendance(
+    body: dict,
+    db: AsyncSession = Depends(get_db),
+):
+    """
+    批量删除考勤记录，通过 body 传递 attendance_ids 列表，最多 500 条。
+    Batch delete attendance records by IDs (max 500).
+    """
+    attendance_ids = body.get("attendance_ids", [])
+    if not attendance_ids:
+        raise HTTPException(status_code=400, detail="attendance_ids is required")
+    if len(attendance_ids) > 500:
+        raise HTTPException(status_code=400, detail="Max 500 records per request")
+
+    result = await db.execute(
+        select(AttendanceRecord).where(AttendanceRecord.id.in_(attendance_ids))
+    )
+    records = list(result.scalars().all())
+    for r in records:
+        await db.delete(r)
+    await db.flush()
+
+    return APIResponse(data={"deleted": len(records)})
+
+
 # NOTE: /{attendance_id} must be after /stats and /device/{device_id} to avoid route conflicts
 @router.get(
     "/{attendance_id}",
@@ -207,3 +237,21 @@ async def get_attendance(attendance_id: int, db: AsyncSession = Depends(get_db))
     if record is None:
         raise HTTPException(status_code=404, detail=f"Attendance {attendance_id} not found")
     return APIResponse(data=AttendanceRecordResponse.model_validate(record))
+
+
+@router.delete(
+    "/{attendance_id}",
+    response_model=APIResponse[dict],
+    summary="删除单条考勤记录 / Delete attendance record",
+)
+async def delete_attendance(attendance_id: int, db: AsyncSession = Depends(get_db)):
+    """按ID删除单条考勤记录 / Delete a single attendance record by ID."""
+    result = await db.execute(
+        select(AttendanceRecord).where(AttendanceRecord.id == attendance_id)
+    )
+    record = result.scalar_one_or_none()
+    if record is None:
+        raise HTTPException(status_code=404, detail=f"Attendance {attendance_id} not found")
+    await db.delete(record)
+    await db.flush()
+    return APIResponse(data={"deleted": 1})