Preserve distance context before search normalization

Reviewed-on: #399

cmd/core-runtime/main.go

@@ -811,9 +811,13 @@ func main() {
 						continue
 					}
 					learnedLexicon := interactiondomain.TaskLexiconFromHistory(conversationHistory)
-					searchQuery := interactiondomain.SearchQueryWithLexicon(part, learnedLexicon)
+					// Preserve the original utterance for semantic route compilation
+					// before removing a search imperative. Distance and route skills
+					// need the user's relation words (for example "до") to bind a
+					// remembered current location to the requested destination.
+					searchQuery := interactiondomain.TravelResearchQuery(part, conversationHistory, now)
+					searchQuery = interactiondomain.SearchQueryWithLexicon(searchQuery, learnedLexicon)
 					searchQuery = interactiondomain.TimeDifferenceResearchQuery(searchQuery)
-					searchQuery = interactiondomain.TravelResearchQuery(searchQuery, conversationHistory, now)
 					// The research capability may try its configured source and a
 					// source-recovery fallback. Its caller must leave enough budget for
 					// both attempts and evidence evaluation.

cmd/core-runtime/main_test.go

@@ -101,6 +101,15 @@ func TestResearchIdentifiersExcludeSearchDate(t *testing.T) {
 	}
 }
 
+func TestResearchQueryKeepsDistanceRelationBeforeSearchNormalization(t *testing.T) {
+	history := []interaction.HumanUtterance{{Content: "я сейчас в Москве"}}
+	query := interactiondomain.TravelResearchQuery("сколько километров до Сочи?", history, time.Time{})
+	query = interactiondomain.SearchQueryWithLexicon(query, interactiondomain.TaskLexicon{})
+	if query != "расстояние между Москве и Сочи в километрах по прямой и по дороге" {
+		t.Fatalf("distance query lost remembered origin: %q", query)
+	}
+}
+
 func TestResponseReviewPreservesAttemptedResearchOutcome(t *testing.T) {
 	if reviewMayReplacePlanningReply(false, false, true, false, "Уточните аэропорт.", "Пока не смог получить проверяемый ответ.") {
 		t.Fatal("review replaced an honest unbacked research outcome")