Improve query intent handling and preview playback

backend/services/gemini.go

@@ -58,6 +58,10 @@ func (g *GeminiService) TranslateQuery(query string) string {
 	if trimmed == "" {
 		return ""
 	}
+	normalizedIntent := normalizeKnownMediaPhrases(trimmed)
+	if looksMostlyASCII(normalizedIntent) {
+		return strings.TrimSpace(normalizedIntent)
+	}
 	if looksMostlyASCII(trimmed) {
 		return trimmed
 	}
@@ -90,19 +94,19 @@ func (g *GeminiService) TranslateQuery(query string) string {
 		rawText, err := g.generateText(body)
 		if err == nil {
 			translated := sanitizePlainEnglishLine(rawText)
-			if translated != "" && !strings.EqualFold(translated, trimmed) {
+			if translated != "" && !strings.EqualFold(translated, trimmed) && !isOvercompressedTranslation(trimmed, translated) {
 				return translated
 			}
 		}
 	}
 
-	if translated, err := g.translateViaGoogle(trimmed); err == nil && translated != "" && isLikelyEnglishQuery(translated) {
+	if translated, err := g.translateViaGoogle(trimmed); err == nil && translated != "" && isLikelyEnglishQuery(translated) && !isOvercompressedTranslation(trimmed, translated) {
 		return translated
 	}
-	if translated := translateKoreanMediaTerms(trimmed); translated != "" && !strings.EqualFold(translated, trimmed) {
+	if translated := translateKoreanMediaTerms(normalizedIntent); translated != "" && !strings.EqualFold(translated, trimmed) {
 		return translated
 	}
-	return trimmed
+	return strings.TrimSpace(normalizedIntent)
 }
 
 func (g *GeminiService) generateText(body map[string]any) (string, error) {
@@ -493,6 +497,12 @@ func translateKoreanMediaTerms(query string) string {
 		korean  string
 		english string
 	}{
+		{korean: "사이버 펑크 도시", english: "cyberpunk city"},
+		{korean: "사이버펑크 도시", english: "cyberpunk city"},
+		{korean: "사이버 펑크", english: "cyberpunk"},
+		{korean: "사이버펑크", english: "cyberpunk"},
+		{korean: "네온 도시", english: "neon city"},
+		{korean: "미래 도시", english: "futuristic city"},
 		{korean: "숲속", english: "forest"},
 		{korean: "다정한", english: "affectionate"},
 		{korean: "항공샷", english: "aerial shot"},
@@ -528,6 +538,38 @@ func translateKoreanMediaTerms(query string) string {
 	return strings.TrimSpace(translated)
 }
 
+func normalizeKnownMediaPhrases(query string) string {
+	normalized := strings.TrimSpace(query)
+	replacements := []struct {
+		from string
+		to   string
+	}{
+		{from: "사이버 펑크 도시", to: "cyberpunk city"},
+		{from: "사이버펑크 도시", to: "cyberpunk city"},
+		{from: "사이버 펑크", to: "cyberpunk"},
+		{from: "사이버펑크", to: "cyberpunk"},
+	}
+	for _, replacement := range replacements {
+		normalized = strings.ReplaceAll(normalized, replacement.from, replacement.to)
+	}
+	return strings.Join(strings.Fields(normalized), " ")
+}
+
+func isOvercompressedTranslation(original, translated string) bool {
+	originalWords := len(strings.Fields(strings.TrimSpace(original)))
+	translatedWords := len(strings.Fields(strings.TrimSpace(translated)))
+	if originalWords < 2 || translatedWords >= 2 {
+		return false
+	}
+	lower := strings.ToLower(strings.TrimSpace(translated))
+	for _, allow := range []string{"cyberpunk", "nightlife", "cityscape"} {
+		if lower == allow {
+			return false
+		}
+	}
+	return true
+}
+
 func (g *GeminiService) translateViaGoogle(query string) (string, error) {
 	baseURL := g.TranslateEndpoint
 	if strings.TrimSpace(baseURL) == "" {