feat: 系统设置新增通报时间配置 + 亮灯表30天滚动窗口 + 相关人员文案统一 + 周报数据补全

- 亮灯表从自然月改为30天滚动窗口（30/60天阈值），解决月底覆盖断崖
- 系统设置新增「定时通报时间」选择器，支局长可配置每日企微通报时刻
- 新增 SystemConfig 键值表 + scheduler_manager APScheduler 运行时重调度
- 拜访记录/导入模板/弹窗表单统一「同访人员」→「相关人员」
- 仪表盘周报数据补全：companion_names_resolved、visitor_name/phone 等字段
- 新增 weekly_report_template.xlsx 模板文件

Co-Authored-By: Claude <noreply@anthropic.com>

backend/app/services/scheduler_manager.py

@@ -0,0 +1,59 @@
+"""APScheduler singleton — allows runtime reschedule of notification jobs."""
+
+from apscheduler.schedulers.asyncio import AsyncIOScheduler
+
+_scheduler: AsyncIOScheduler | None = None
+
+
+def get_scheduler() -> AsyncIOScheduler:
+    """Lazy-init and return the global scheduler."""
+    global _scheduler
+    if _scheduler is None:
+        _scheduler = AsyncIOScheduler()
+    return _scheduler
+
+
+async def reschedule_daily_check(hour: int, minute: int):
+    """Update the daily_check cron job to a new time."""
+    sched = get_scheduler()
+    # Remove and re-add — APScheduler reschedule_job is inconsistent with cron triggers
+    try:
+        sched.remove_job("daily_check")
+    except Exception:
+        pass
+    from app.services.scheduler import check_daily_reporting
+    from app.database import async_session
+
+    async def _wrapper():
+        async with async_session() as db:
+            await check_daily_reporting(db)
+
+    sched.add_job(_wrapper, "cron", hour=hour, minute=minute, id="daily_check")
+
+
+def start_scheduler(notification_hour: int = 17, notification_minute: int = 30):
+    """Start the scheduler with configured notification times."""
+    sched = get_scheduler()
+
+    from app.services.scheduler import check_daily_reporting, check_overdue_plans
+    from app.database import async_session
+
+    async def _daily():
+        async with async_session() as db:
+            await check_daily_reporting(db)
+
+    async def _overdue():
+        async with async_session() as db:
+            await check_overdue_plans(db)
+
+    sched.add_job(_daily, "cron", hour=notification_hour, minute=notification_minute, id="daily_check")
+    sched.add_job(_overdue, "cron", hour=9, minute=0, id="overdue_check")
+    sched.start()
+
+
+def shutdown_scheduler():
+    """Shutdown the scheduler gracefully."""
+    global _scheduler
+    if _scheduler is not None:
+        _scheduler.shutdown(wait=False)
+        _scheduler = None