Refine result modal and Gemini recovery

backend/handlers/api.go

@@ -323,6 +323,18 @@ func (a *App) searchMedia(c *gin.Context) {
 	a.Hub.Broadcast("progress", gin.H{"type": "search", "status": "analyzing all candidate visuals with Gemini Vision", "progress": 75})
 	recommended, geminiStats, geminiErr := services.EvaluateAllCandidatesWithGemini(a.GeminiService, req.Query, scored)
 	a.debug("search gemini evaluation", geminiStats)
+	if services.NeedsSupplementalExploration(recommended) {
+		a.Hub.Broadcast("progress", gin.H{"type": "search", "status": "Gemini 평가가 약해 추가 후보를 탐색하는 중", "progress": 82})
+		explorationQueries := buildSupplementalQueries(req.Query, queryVariants)
+		extraResults, extraErr := a.SearchService.SearchMedia(explorationQueries, enabledPlatforms)
+		if extraErr == nil && len(extraResults) > 0 {
+			results = mergeSearchResults(results, extraResults)
+			scored = services.RankSearchResults(strings.Join(explorationQueries[:min(len(explorationQueries), 3)], " "), results)
+			recommended, geminiStats, geminiErr = services.EvaluateAllCandidatesWithGemini(a.GeminiService, req.Query, scored)
+			a.debug("search supplemental query variants", gin.H{"variants": explorationQueries, "variantCount": len(explorationQueries)})
+			a.debug("search gemini evaluation after supplemental search", geminiStats)
+		}
+	}
 	if geminiErr != nil && len(recommended) == 0 {
 		warning := geminiErr.Error()
 		fallback := services.BuildFallbackRecommendations(scored, 20, "")
@@ -419,6 +431,45 @@ func selectedPlatformLabel(platforms map[string]bool) string {
 	return strings.Join(labels, ", ")
 }
 
+func buildSupplementalQueries(query string, existing []string) []string {
+	candidates := append([]string{}, existing...)
+	candidates = append(candidates,
+		query+" cinematic stock footage",
+		query+" editorial b-roll",
+		query+" establishing shot",
+		query+" drone footage",
+	)
+
+	seen := map[string]bool{}
+	result := make([]string, 0, len(candidates))
+	for _, item := range candidates {
+		trimmed := strings.Join(strings.Fields(strings.TrimSpace(item)), " ")
+		if trimmed == "" {
+			continue
+		}
+		key := strings.ToLower(trimmed)
+		if seen[key] {
+			continue
+		}
+		seen[key] = true
+		result = append(result, trimmed)
+	}
+	return result
+}
+
+func mergeSearchResults(base, extra []services.SearchResult) []services.SearchResult {
+	merged := make([]services.SearchResult, 0, len(base)+len(extra))
+	seen := map[string]bool{}
+	for _, item := range append(base, extra...) {
+		if item.Link == "" || seen[item.Link] {
+			continue
+		}
+		seen[item.Link] = true
+		merged = append(merged, item)
+	}
+	return merged
+}
+
 func summarizeSearchResults(results []services.SearchResult, duration time.Duration, geminiCap int, warning string) searchDebugSummary {
 	bySource := map[string]int{}
 	withPreview := 0