Improve query intent handling and preview playback

backend/services/gemini_test.go

@@ -39,3 +39,10 @@ func TestTranslateQueryFallsBackToDictionaryWhenTranslateFails(t *testing.T) {
 		t.Fatalf("expected dictionary fallback translation, got %q", translated)
 	}
 }
+
+func TestNormalizeKnownMediaPhrases(t *testing.T) {
+	translated := translateKoreanMediaTerms("사이버 펑크 도시")
+	if translated != "cyberpunk city" {
+		t.Fatalf("expected cyberpunk city, got %q", translated)
+	}
+}