Expand search breadth and modal action metadata

backend/handlers/api.go

@@ -82,6 +82,7 @@ type PreviewResponse struct {
 
 type searchDebugSummary struct {
 	Total                 int              `json:"total"`
+	VisibleCount          int              `json:"visibleCount,omitempty"`
 	BySource              map[string]int   `json:"bySource"`
 	WithPreview           int              `json:"withPreview"`
 	WithThumbnail         int              `json:"withThumbnail"`
@@ -477,16 +478,16 @@ func (a *App) searchMedia(c *gin.Context) {
 		return
 	}
 
-	merged := services.MergeRecommendations(recommended, scored, 20)
+	merged := services.MergeRecommendations(recommended, scored, 16)
 	if geminiErr != nil {
 		merged = services.BackfillRecommendations(
 			merged,
 			scored,
-			12,
+			16,
 			"Gemini 배치 일부가 실패해 미리보기 가능한 상위 후보를 보강했습니다.",
 		)
 	}
-	merged = services.RandomizeTopRecommendations(merged, 8)
+	merged = services.RandomizeTopRecommendations(merged, 6)
 	for idx := range merged {
 		merged[idx] = services.DecorateRecommendationMedia(merged[idx])
 	}
@@ -665,6 +666,7 @@ func summarizeSearchResults(results []services.SearchResult, duration time.Durat
 	}
 	return searchDebugSummary{
 		Total:                 len(results),
+		VisibleCount:          len(results),
 		BySource:              bySource,
 		WithPreview:           withPreview,
 		WithThumbnail:         withThumbnail,
@@ -717,6 +719,7 @@ func summarizeRecommendationResults(results []services.AIRecommendation, duratio
 	}
 	return searchDebugSummary{
 		Total:                 len(results),
+		VisibleCount:          len(results),
 		BySource:              bySource,
 		WithPreview:           withPreview,
 		WithThumbnail:         withThumbnail,