Fix product performance grouped JSON build

svc/main.go

@@ -227,6 +227,7 @@ InitRoutes — FULL V3 (Method-aware) PERMISSION EDITION
 func InitRoutes(pgDB *sql.DB, mssql *sql.DB, ml *mailer.GraphMailer) *mux.Router {
 
 	r := mux.NewRouter()
+	mountUploads(r)
 	mountSPA(r)
 
 	/*
@@ -1517,6 +1518,26 @@ func main() {
 
 }
 
+func mountUploads(r *mux.Router) {
+	root := strings.TrimSpace(os.Getenv("BLOB_ROOT"))
+	if root == "" {
+		return
+	}
+	uploadsRoot := filepath.Join(root, "uploads")
+	if fi, err := os.Stat(uploadsRoot); err != nil || !fi.IsDir() {
+		return
+	}
+	fileServer := http.StripPrefix("/uploads/", http.FileServer(http.Dir(uploadsRoot)))
+	r.PathPrefix("/uploads/").Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet && r.Method != http.MethodHead {
+			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+			return
+		}
+		w.Header().Set("Cache-Control", "public, max-age=3600")
+		fileServer.ServeHTTP(w, r)
+	})).Methods(http.MethodGet, http.MethodHead, http.MethodOptions)
+}
+
 func mountSPA(r *mux.Router) {
 	r.NotFoundHandler = http.HandlerFunc(spaIndex)
 	r.HandleFunc("/", spaIndex).Methods(http.MethodGet)

svc/queries/product_performance.go

@@ -6129,6 +6129,10 @@ func productPerformanceMapVariantKey(row map[string]any) string {
 
 func deriveProductPerformanceGroupMetrics(out map[string]any, groupField string) {
 	normalizeProductPerformanceCostFields(out)
+	isGroup := strings.TrimSpace(groupField) != ""
+	if isGroup {
+		out["group_field"] = groupField
+	}
 	preservedCustomerScores := map[string]float64{}
 	preservedProductScores := map[string]float64{}
 	for _, suffix := range productPerformancePeriodSuffixes() {
@@ -6149,7 +6153,7 @@ func deriveProductPerformanceGroupMetrics(out map[string]any, groupField string)
 		qty := floatFromMap(out, "sales_qty_"+suffix)
 		stockQty := floatFromMap(out, "stock_qty")
 		turnoverBase := floatFromMap(out, "avg_stock_"+suffix)
-		if turnoverBase <= 0 {
+		if turnoverBase <= 0 && !isGroup {
 			turnoverBase = stockQty
 		}
 		days := productPerformancePeriodDays(out, suffix)
@@ -6381,7 +6385,7 @@ func productPerformanceSalesPeriodScore(row map[string]any, suffix string) float
 	stockTurnover := floatFromMap(row, "stock_turnover_"+suffix)
 	if stockTurnover == 0 {
 		avgStock := floatFromMap(row, "avg_stock_"+suffix)
-		if avgStock <= 0 {
+		if avgStock <= 0 && strings.TrimSpace(stringFromMap(row, "group_field")) == "" {
 			avgStock = floatFromMap(row, "stock_qty")
 		}
 		if avgStock > 0 {