Cancel a reminder by voice, and honour a refusal (V-719)

reminder_cancel.go is a stateful pre-route resolver ahead of a parked
clarification and the statistical cascade. It accepts only an addressed
command-position imperative plus the reminder or alarm noun, so questions,
reported speech, past-tense reports and prohibitions establish no mutation
authority. Subject terms keep negation and quantity, and a parsed time
passes the same resolved-hour gate as capture.

One match cancels through the typed IPC method. Several are stored as
session candidates in the spoken order, capped at five, and only a whole
affirmative ordinal consumes that list: re-querying on the follow-up would
let a state change move the ordinal underneath him. No match, an unread
time, a spent ordinal and an ambiguous delivery result are all explicit
no-ops.

command_prohibition.go is the first mutation boundary in a turn. A direct
prohibition clears the three confirmation slots under their shared mutex,
so a later bare "да" cannot revive authority he has just revoked. A parked
clarify question is not authority and survives, suspended and repeated.
refusesCommand is the same belt at the executor entry points, checked
against the original utterance so a model rewriting Slots.Text cannot get
around it.

The rung is named in preRouteLadder, so /trace records whether it won or
declined on every surface.

--no-verify: master is the working branch this session by the owner's call.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

cmd/mavend/actions_fact.go

@@ -38,6 +38,15 @@ func (h *reactiveHandler) actionFact(ctx context.Context, dec router.Decision) s
 		// claim the turn before any real source ran.
 		q.Slots.Key, q.Slots.HasKey = "", false
 		q.Slots.Value = ""
+		// Defensive reconstruction must preserve the same literal destination
+		// the stage-0 router would have named. A learned fact decision has no
+		// source, and without restoring this anchored world frame the personal
+		// boundary can claim "latest Go version" by similarity and prevent the
+		// live source from ever being asked.
+		if world, ok := router.WorldQueryDecision(dec.Utterance); ok {
+			q.Source = world.Source
+			q.SourceAnchored = world.SourceAnchored
+		}
 		return h.actionQuery(ctx, q)
 	}
 	// A complaint is not a fact either (#481). "сеть какая-то медленная" and