feat(panel): schedule board shows only enabled sources

Disabled/fully-off sources (skill off + schedule not active) no longer
appear; transitional state (skill off but schedule still active) stays
visible until reconciled.

web/app.py

@@ -1293,6 +1293,10 @@ def schedule_board():
     now = datetime.now()
     skills = pl.skill_sources()
     names = sorted((set(skills) | set(pl.list_schedules())) - {"digest"})
+    # 只展示已启用的栏目(技能启用,或调度仍在跑的过渡态);彻底关停的隐藏
+    names = [n for n in names
+             if skills.get(n, {}).get("enabled", False)
+             or pl.schedule_state(n) == "active"]
     rows = []
     for n in names:
         state = pl.schedule_state(n)