Improve query intent handling and preview playback

backend/services/cse.go

@@ -229,6 +229,9 @@ func (s *SearchService) enrichArtgrid(result SearchResult) SearchResult {
 	if result.ThumbnailURL == "" || result.PreviewVideoURL == "" {
 		html, err := s.fetchText(result.Link)
 		if err == nil {
+			if !isMatchingArtgridClipPage(html, clipID) {
+				return result
+			}
 			result.Title = firstNonEmpty(
 				cleanArtgridTitle(extractMetaContent(html, "og:title")),
 				cleanArtgridTitle(extractMetaContent(html, "title")),
@@ -756,6 +759,33 @@ func cleanArtgridDescription(description string) string {
 	return strings.TrimSpace(description)
 }
 
+func isMatchingArtgridClipPage(html, clipID string) bool {
+	if clipID == "" {
+		return false
+	}
+	ogURL := extractMetaContent(html, "og:url")
+	canonical := extractCanonicalURL(html)
+	lowerHTML := strings.ToLower(html)
+	for _, candidate := range []string{ogURL, canonical} {
+		if strings.Contains(candidate, clipID) {
+			return true
+		}
+	}
+	if strings.Contains(lowerHTML, "main-clipvideo_"+clipID) || strings.Contains(lowerHTML, "/clip/"+clipID+"/") {
+		return true
+	}
+	return false
+}
+
+func extractCanonicalURL(html string) string {
+	pattern := regexp.MustCompile(`(?i)<link[^>]+rel=["']canonical["'][^>]+href=["']([^"']+)`)
+	matches := pattern.FindStringSubmatch(html)
+	if len(matches) == 2 {
+		return htmlUnescape(matches[1])
+	}
+	return ""
+}
+
 func deriveEnvatoPreviewFromThumbnail(thumbnail string) string {
 	candidate := htmlUnescape(strings.TrimSpace(thumbnail))
 	if candidate == "" {