diff --git a/frontend/src/admin/pages/EvalPage.tsx b/frontend/src/admin/pages/EvalPage.tsx
index 220c2bf..1d4bc01 100644
--- a/frontend/src/admin/pages/EvalPage.tsx
+++ b/frontend/src/admin/pages/EvalPage.tsx
@@ -163,7 +163,7 @@ export default function EvalPage() {
               <Spinner />
             </div>
           ) : summary.length === 0 ? (
-            <EmptyState text="暂无评估数据,请调整筛选条件或先完成预测与结算" />
+            <EmptyText text="暂无评估数据,请调整筛选条件或先完成预测与结算" />
           ) : (
             <div className="overflow-x-auto">
             <DataTable
diff --git a/src/api/app.py b/src/api/app.py
index f45ec32..102d74f 100644
--- a/src/api/app.py
+++ b/src/api/app.py
@@ -50,7 +50,7 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
         for s in schedules:
             leagues = s.leagues.split(",") if s.leagues else list(BZZOIRO_LEAGUE_IDS.keys())
             scheduler.register(
-                s.id, s.task,
+                s.id, s.cron,
                 lambda sid=s.id: _run_scheduled_task(sid),
                 enabled=s.enabled,
             )
diff --git a/src/api/routes/schedules.py b/src/api/routes/schedules.py
index a00327f..75f1992 100644
--- a/src/api/routes/schedules.py
+++ b/src/api/routes/schedules.py
@@ -91,8 +91,8 @@ async def create_schedule(req: ScheduleIn, db: AsyncSession = Depends(get_db_rea
     db.add(sched)
     await db.commit()
 
-    # 注册到调度器
-    scheduler.register(req.id, req.task, lambda: _run_scheduled_task(req.id), enabled=req.enabled)
+    # 注册到调度器(注意: 第 2 参是 cron 表达式,不是 task 类型名)
+    scheduler.register(req.id, req.cron, lambda: _run_scheduled_task(req.id), enabled=req.enabled)
 
     return {"ok": True, "id": req.id}
 
@@ -115,8 +115,8 @@ async def update_schedule(schedule_id: str, req: ScheduleUpdate, db: AsyncSessio
         sched.enabled = req.enabled
     await db.commit()
 
-    # 更新调度器(使用最终值)
-    scheduler.register(schedule_id, sched.task, lambda: _run_scheduled_task(schedule_id), enabled=sched.enabled)
+    # 更新调度器(第 2 参传 cron 表达式;使用最终值)
+    scheduler.register(schedule_id, sched.cron, lambda: _run_scheduled_task(schedule_id), enabled=sched.enabled)
 
     return {"ok": True}
 
diff --git a/src/core/scheduler.py b/src/core/scheduler.py
index ac057e5..214bc30 100644
--- a/src/core/scheduler.py
+++ b/src/core/scheduler.py
@@ -14,6 +14,9 @@ logger = logging.getLogger(__name__)
 class ScheduledTask:
     """一个定时任务。"""
 
+    #: 运行循环的轮询粒度(秒)。同时决定运行期 cron/next_run 变更的生效延迟上限。
+    SLEEP_TICK: float = 1.0
+
     def __init__(
         self,
         task_id: str,
@@ -28,13 +31,29 @@ class ScheduledTask:
         self.last_run: datetime | None = None
         self.next_run: datetime | None = None
         self._task: asyncio.Task | None = None
-        self._calc_next()
+        # 构造时立即校验 cron:非法表达式直接报错,不留给 _run_loop 静默吞掉。
+        # (全量审查 C1: 传入任务类型字符串时 croniter 抛异常被吞 → 任务永不触发)
+        self._calc_next(raise_on_error=True)
 
-    def _calc_next(self) -> None:
+    def _calc_next(self, *, raise_on_error: bool = False) -> None:
+        """计算下次运行时间。
+
+        raise_on_error=True 时非法 cron 抛 ValueError(构造期用);
+        否则仅告警并置 next_run=None(运行期容错)。
+        """
         try:
-            self.next_run = croniter(self.cron, datetime.now).get_next(datetime)
-        except Exception:
+            # 必须调用 datetime.now():传方法对象本身会让 croniter 在
+            # (start_time or now) 的算术里抛 TypeError,导致 next_run 永远为 None。
+            self.next_run = croniter(self.cron, datetime.now()).get_next(datetime)
+        except Exception as e:
             self.next_run = None
+            msg = (
+                f"任务 {self.task_id!r} 的 cron 表达式非法: {self.cron!r} ({e})。"
+                "注意: 此处应为 cron 表达式(如 '0 8 * * *'),不是任务类型名。"
+            )
+            if raise_on_error:
+                raise ValueError(msg) from e
+            logger.error(msg)
 
     def update(self, cron: str | None = None, enabled: bool | None = None) -> None:
         if cron is not None:
@@ -44,27 +63,45 @@ class ScheduledTask:
         self._calc_next()
 
     async def _run_loop(self) -> None:
+        """任务运行循环。
+
+        睡眠策略: 使用固定的短 tick(SLEEP_TICK 秒)轮询 next_run,而不是
+        一次性 sleep 到 next_run。原因是运行期可通过 API 更新 cron / 手动
+        调整 next_run;若按 wait_seconds 长时间沉睡,变更最长要等
+        wait_seconds 才生效(实测可达 60s),表现为「改了不生效」。
+        """
         while True:
-            if not self.enabled or not self.next_run:
-                await asyncio.sleep(60)
-                self._calc_next()
-                continue
-
-            now = datetime.now()
-            wait_seconds = (self.next_run - now).total_seconds()
-            if wait_seconds > 0:
-                await asyncio.sleep(min(wait_seconds, 60))
-                continue
-
-            # 执行任务
-            self.last_run = datetime.now()
-            self._calc_next()
             try:
-                logger.info("定时任务触发: %s (cron=%s)", self.task_id, self.cron)
-                await self.fn()
-                logger.info("定时任务完成: %s", self.task_id)
+                if not self.enabled or not self.next_run:
+                    await asyncio.sleep(self.SLEEP_TICK)
+                    self._calc_next()
+                    continue
+
+                now = datetime.now()
+                wait_seconds = (self.next_run - now).total_seconds()
+                if wait_seconds > 0:
+                    # 短 tick 轮询,保证 next_run/cron 变更能及时被感知
+                    await asyncio.sleep(min(wait_seconds, self.SLEEP_TICK))
+                    continue
+
+                # 执行任务:先推进 next_run 再执行,避免任务耗时导致重复触发
+                self.last_run = datetime.now()
+                self._calc_next()
+                try:
+                    logger.info("定时任务触发: %s (cron=%s)", self.task_id, self.cron)
+                    await self.fn()
+                    logger.info("定时任务完成: %s", self.task_id)
+                except asyncio.CancelledError:
+                    raise
+                except Exception:
+                    # 单个任务失败不能终止循环,否则一次异常即永久停摆
+                    logger.exception("定时任务失败: %s", self.task_id)
+            except asyncio.CancelledError:
+                raise
             except Exception:
-                logger.exception("定时任务失败: %s", self.task_id)
+                # 循环体自身的意外异常(如 _calc_next)也不能终止调度
+                logger.exception("调度循环异常: %s", self.task_id)
+                await asyncio.sleep(self.SLEEP_TICK)
 
 
 class DataQualityScheduler:
@@ -152,6 +189,7 @@ class Scheduler:
 
     def __init__(self) -> None:
         self._tasks: dict[str, ScheduledTask] = {}
+        self._running = False
 
     def register(
         self,
@@ -160,13 +198,31 @@ class Scheduler:
         fn: Callable[[], Coroutine],
         enabled: bool = True,
     ) -> ScheduledTask:
-        if task_id in self._tasks:
-            self._tasks[task_id].update(cron=cron, enabled=enabled)
-            return self._tasks[task_id]
-        task = ScheduledTask(task_id, cron, fn, enabled)
-        self._tasks[task_id] = task
+        """注册(或更新)一个定时任务。
+
+        若调度器已 start,新任务会立即启动其运行循环 ——
+        否则运行期通过 API 新建的任务永远不会被执行(全量审查 C1 缺陷 2)。
+        """
+        existing = self._tasks.get(task_id)
+        if existing is not None:
+            existing.update(cron=cron, enabled=enabled)
+            # 更新 cron 后重新校验:改坏了要立刻报错,而不是静默失活
+            existing._calc_next(raise_on_error=True)
+            existing.fn = fn
+            task = existing
+        else:
+            task = ScheduledTask(task_id, cron, fn, enabled)
+            self._tasks[task_id] = task
+
+        if self._running:
+            self._ensure_loop(task)
         return task
 
+    def _ensure_loop(self, task: ScheduledTask) -> None:
+        """为任务启动运行循环(幂等:已在运行则跳过)。"""
+        if task._task is None or task._task.done():
+            task._task = asyncio.create_task(task._run_loop())
+
     def get(self, task_id: str) -> ScheduledTask | None:
         return self._tasks.get(task_id)
 
@@ -174,14 +230,18 @@ class Scheduler:
         return list(self._tasks.values())
 
     def remove(self, task_id: str) -> None:
-        self._tasks.pop(task_id, None)
+        task = self._tasks.pop(task_id, None)
+        if task is not None and task._task is not None:
+            task._task.cancel()
 
     async def start(self) -> None:
+        self._running = True
         for task in self._tasks.values():
-            task._task = asyncio.create_task(task._run_loop())
+            self._ensure_loop(task)
         logger.info("定时调度器已启动, 共 %d 个任务", len(self._tasks))
 
     async def stop(self) -> None:
+        self._running = False
         for task in self._tasks.values():
             if task._task:
                 task._task.cancel()
diff --git a/tests/test_scheduler_registration.py b/tests/test_scheduler_registration.py
new file mode 100644
index 0000000..e7604c9
--- /dev/null
+++ b/tests/test_scheduler_registration.py
@@ -0,0 +1,190 @@
+"""C1 回归测试: 定时任务调度器「静默失效」缺陷。
+
+原始缺陷(全量审查 C1):
+  1. `Scheduler.register()` 的第 2 参是 cron 表达式,但 app.py:52 /
+     schedules.py:95,119 三处调用传的都是任务类型字符串("events" 等)。
+     `croniter("events")` 抛异常被 `_calc_next` 的 except 吞掉 →
+     next_run 永远为 None → 所有定时任务从不触发且无任何报错。
+  2. 运行期通过 API 新建的任务只进了 _tasks 字典,从未
+     asyncio.create_task 启动 _run_loop(只有 Scheduler.start() 会建循环)。
+
+这些用例不依赖数据库,直接对调度器类做行为断言。
+"""
+from __future__ import annotations
+
+import asyncio
+
+import pytest
+
+from src.core.scheduler import ScheduledTask, Scheduler
+
+
+class TestCronValidation:
+    """非法 cron 必须显式报错,不能静默变成永不触发。"""
+
+    def test_nonevent_cron_raises(self):
+        """把任务类型字符串当 cron 传(原缺陷) → 构造时立即抛 ValueError。"""
+        async def _noop() -> None: ...
+        with pytest.raises(ValueError, match="cron"):
+            ScheduledTask("daily-events", "events", _noop)
+
+    def test_valid_cron_accepted(self):
+        """合法 cron 正常构造,且 next_run 被计算出来(非 None)。"""
+        async def _noop() -> None: ...
+        task = ScheduledTask("daily-events", "0 8 * * *", _noop)
+        assert task.next_run is not None
+
+    def test_next_run_is_in_future(self):
+        """next_run 必须落在未来,否则 _run_loop 会立刻误触发。"""
+        from datetime import datetime
+        async def _noop() -> None: ...
+        task = ScheduledTask("t", "*/30 * * * *", _noop)
+        assert task.next_run > datetime.now()
+
+    def test_croniter_receives_called_datetime(self):
+        """回归: `croniter(expr, datetime.now)`(未调用)会抛
+        TypeError: 'builtin_function_or_method' object cannot be interpreted
+        as an integer —— 这是比「传错参数」更深一层的静默失效根源。
+        断言 next_run 是真实 datetime,而非 None。"""
+        from datetime import datetime
+        async def _noop() -> None: ...
+        task = ScheduledTask("t", "0 8 * * *", _noop)
+        assert isinstance(task.next_run, datetime), (
+            f"next_run 应为 datetime,实际 {task.next_run!r} —— "
+            "croniter 的 start_time 未正确传入"
+        )
+
+
+class TestRunLoopActuallyFires:
+    """注册后任务必须真的在到期时被执行(端到端行为,不 mock 内部)。"""
+
+    async def test_register_then_start_runs_task(self):
+        """cron 到点后任务函数被调用一次。用 1 秒粒度的 * * * * * 加速验证。"""
+        calls: list[str] = []
+
+        async def _job() -> None:
+            calls.append("ran")
+
+        sched = Scheduler()
+        sched.register("t1", "* * * * *", _job, enabled=True)
+        await sched.start()
+        try:
+            # _run_loop 用 min(wait, 60) 分段睡;下一分钟边界最多 60 秒。
+            # 为让测试可跑,直接把 next_run 拨到过去,触发一次执行。
+            task = sched.get("t1")
+            from datetime import datetime, timedelta
+            task.next_run = datetime.now() - timedelta(seconds=1)
+            for _ in range(40):
+                if calls:
+                    break
+                await asyncio.sleep(0.05)
+        finally:
+            await sched.stop()
+        assert calls == ["ran"], "注册并 start 后,到期任务未被执行"
+
+    async def test_register_after_start_also_runs(self):
+        """运行期(已 start 之后)新 register 的任务也必须被启动(原缺陷 2)。"""
+        calls: list[str] = []
+
+        async def _job() -> None:
+            calls.append("late")
+
+        sched = Scheduler()
+        await sched.start()
+        try:
+            sched.register("late-task", "* * * * *", _job, enabled=True)
+            from datetime import datetime, timedelta
+            sched.get("late-task").next_run = datetime.now() - timedelta(seconds=1)
+            for _ in range(40):
+                if calls:
+                    break
+                await asyncio.sleep(0.05)
+        finally:
+            await sched.stop()
+        assert calls == ["late"], "start 之后注册的任务未被启动循环"
+
+    async def test_disabled_task_does_not_run(self):
+        """enabled=False 的任务不执行。"""
+        calls: list[str] = []
+
+        async def _job() -> None:
+            calls.append("nope")
+
+        sched = Scheduler()
+        sched.register("off", "* * * * *", _job, enabled=False)
+        await sched.start()
+        try:
+            from datetime import datetime, timedelta
+            sched.get("off").next_run = datetime.now() - timedelta(seconds=1)
+            await asyncio.sleep(0.3)
+        finally:
+            await sched.stop()
+        assert calls == []
+
+
+class TestTaskFailureIsolation:
+    """单个任务抛异常不能杀掉循环(否则一次失败永久停摆)。"""
+
+    async def test_exception_does_not_kill_loop(self):
+        """任务抛异常后,循环仍存活并能在下一次到期时继续执行。"""
+        runs: list[int] = []
+
+        async def _boom() -> None:
+            runs.append(1)
+            if len(runs) == 1:
+                raise RuntimeError("boom")
+
+        sched = Scheduler()
+        sched.register("flaky", "* * * * *", _boom, enabled=True)
+        await sched.start()
+        try:
+            from datetime import datetime, timedelta
+            task = sched.get("flaky")
+            for _ in range(40):
+                if len(runs) >= 2:
+                    break
+                task.next_run = datetime.now() - timedelta(seconds=1)
+                await asyncio.sleep(0.05)
+            assert len(runs) >= 2, "任务首次抛异常后循环未继续"
+            assert task._task is not None and not task._task.done(), (
+                "循环在任务抛异常后已终止"
+            )
+        finally:
+            await sched.stop()
+
+    async def test_next_run_change_takes_effect_promptly(self):
+        """运行期把 next_run 改到过去,循环须在 SLEEP_TICK 内感知并触发。
+
+        回归: 原实现 sleep(min(wait_seconds, 60)),当 wait_seconds<60 时
+        会一次性睡满 wait_seconds,导致运行期通过 API 更新 cron 后
+        最长 60s 不生效。
+        """
+        calls: list[str] = []
+
+        async def _job() -> None:
+            calls.append("ran")
+
+        import src.core.scheduler as sched_mod
+        old_tick = sched_mod.ScheduledTask.SLEEP_TICK
+        sched_mod.ScheduledTask.SLEEP_TICK = 0.05
+        try:
+            sched = Scheduler()
+            sched.register("tick", "* * * * *", _job, enabled=True)
+            await sched.start()
+            try:
+                from datetime import datetime, timedelta
+                # 先等循环进入 sleep(wait 接近 60s 的最坏情况)
+                await asyncio.sleep(0.15)
+                sched.get("tick").next_run = datetime.now() - timedelta(seconds=1)
+                # 短 tick 应在 ~0.15s 内感知;给 1s 容差
+                for _ in range(40):
+                    if calls:
+                        break
+                    await asyncio.sleep(0.05)
+            finally:
+                await sched.stop()
+        finally:
+            sched_mod.ScheduledTask.SLEEP_TICK = old_tick
+        assert calls == ["ran"], (
+            "next_run 变更后循环未在 tick 内响应(疑似一次性睡满 wait_seconds)"
+        )