feat: 位置追踪优化、考勤去重、围栏考勤补充设备信息

- 地图轨迹点按定位类型区分颜色 (GPS蓝/WiFi青/LBS橙/蓝牙紫)
- LBS/WiFi定位点显示精度圈 (虚线圆, LBS~1km/WiFi~80m)
- 地图图例显示各定位类型颜色和精度范围
- 精度圈添加 bubble:true 防止遮挡轨迹点点击
- 点击列表记录直接在地图显示Marker+弹窗 (无需先加载轨迹)
- 修复3D地图setZoomAndCenter坐标偏移, 改用setCenter+setZoom
- 最新位置轮询超时从15s延长至30s (适配LBS慢响应)
- 考勤每日去重: 同设备同类型每天只记录一条 (fence/device/bluetooth通用)
- 围栏自动考勤补充设备电量/信号/基站信息 (从Device表和位置包获取)
- 考勤来源字段 attendance_source 区分 device/bluetooth/fence

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

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

app/routers/locations.py

@@ -7,7 +7,7 @@ import math
 from datetime import datetime
 
 from fastapi import APIRouter, Body, Depends, HTTPException, Query
-from sqlalchemy import select, delete
+from sqlalchemy import func, select, delete
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.dependencies import require_write
@@ -140,6 +140,68 @@ async def device_track(
     )
 
 
+@router.post(
+    "/batch-delete",
+    response_model=APIResponse[dict],
+    summary="批量删除位置记录 / Batch delete location records",
+    dependencies=[Depends(require_write)],
+)
+async def batch_delete_locations(
+    location_ids: list[int] = Body(..., min_length=1, max_length=500, embed=True),
+    db: AsyncSession = Depends(get_db),
+):
+    """批量删除位置记录（最多500条）。"""
+    result = await db.execute(
+        delete(LocationRecord).where(LocationRecord.id.in_(location_ids))
+    )
+    await db.flush()
+    return APIResponse(
+        message=f"已删除 {result.rowcount} 条位置记录",
+        data={"deleted": result.rowcount, "requested": len(location_ids)},
+    )
+
+
+@router.post(
+    "/delete-no-coords",
+    response_model=APIResponse[dict],
+    summary="删除无坐标位置记录 / Delete location records without coordinates",
+    dependencies=[Depends(require_write)],
+)
+async def delete_no_coord_locations(
+    device_id: int | None = Body(default=None, description="设备ID (可选，不传则所有设备)"),
+    start_time: str | None = Body(default=None, description="开始时间 ISO 8601"),
+    end_time: str | None = Body(default=None, description="结束时间 ISO 8601"),
+    db: AsyncSession = Depends(get_db),
+):
+    """删除经纬度为空的位置记录，可按设备和时间范围过滤。"""
+    from datetime import datetime as dt
+
+    conditions = [
+        (LocationRecord.latitude.is_(None)) | (LocationRecord.longitude.is_(None))
+    ]
+    if device_id is not None:
+        conditions.append(LocationRecord.device_id == device_id)
+    if start_time:
+        conditions.append(LocationRecord.recorded_at >= dt.fromisoformat(start_time))
+    if end_time:
+        conditions.append(LocationRecord.recorded_at <= dt.fromisoformat(end_time))
+
+    # Count first
+    count_result = await db.execute(
+        select(func.count(LocationRecord.id)).where(*conditions)
+    )
+    count = count_result.scalar() or 0
+
+    if count > 0:
+        await db.execute(delete(LocationRecord).where(*conditions))
+        await db.flush()
+
+    return APIResponse(
+        message=f"已删除 {count} 条无坐标记录",
+        data={"deleted": count},
+    )
+
+
 @router.get(
     "/{location_id}",
     response_model=APIResponse[LocationRecordResponse],