router: answer the task-list ask at stage 0 too, and mirror it in the fixture (V-467)

The capture half landed with the grammar in 87d1761. This is the exposure
the task asked to check for: IsTaskListQuery is a deterministic lookup that
only runs once the turn is already a query, so a phrasing the model calls
system never reaches it. The eval fixture was also missing both grammars,
which is only worth having while it is the daemon's grammar set.

cmd/mavend/voicewire.go

@@ -385,6 +385,9 @@ func buildRouter(emb router.Embedder, acts router.ActMatcher, threshold float64,
 	// Same reason as the agenda rules, for the feeds: "что нового в лентах?"
 	// routed system and answered "пока не умею" (Vikunja #474).
 	grammars = append(grammars, router.FeedQueryGrammar())
+	// The list side of the same exposure: a phrasing with no possessive in it
+	// ("список дел") routed system and never reached queryTasks (Vikunja #467).
+	grammars = append(grammars, router.TaskListGrammar())
 	grammars = append(grammars, router.ReminderGrammar())
 	// Last, and it matches any utterance shape — its Build is the filter. An
 	// explicit capture marker beats the model, which called it an act and