Fix Source Status Actions

The Sources view can mislead an owner during recovery: row-local state can survive source switches, run-start toasts do not link to the run, owner-runnable verdict actions can be hidden from the list, and a recent successful collection with known terminal coverage gaps can read as a total collection failure.

The live Sources page exposed several honesty and action-routing defects at once:

The rendered verdict's primary required action SHALL remain the single action source consumed by owner surfaces. Owner surfaces SHALL NOT replace an owner-runnable required action with a generic run control. Owner surfaces SHALL render run-start controls only for required-action kinds that actually start a run from that surface, and SHALL route other owner-runnable actions to the appropriate detail flow.