fix: stabilize library paths and subscription matching

internal/service/cloud_mount_counts.go

@@ -0,0 +1,38 @@
+package service
+
+import (
+	"context"
+
+	"github.com/ShukeBta/MediaStationGo/internal/model"
+	"github.com/ShukeBta/MediaStationGo/internal/repository"
+)
+
+func cloudLibraryMediaCounts(ctx context.Context, repo *repository.Container, libs []model.Library) map[string]int64 {
+	counts := make(map[string]int64, len(libs))
+	if repo == nil || repo.DB == nil || len(libs) == 0 {
+		return counts
+	}
+	ids := make([]string, 0, len(libs))
+	for _, lib := range libs {
+		ids = append(ids, lib.ID)
+	}
+	if len(ids) == 0 {
+		return counts
+	}
+	var rows []struct {
+		LibraryID string
+		Count     int64
+	}
+	if err := repo.DB.WithContext(ctx).
+		Model(&model.Media{}).
+		Select("library_id, COUNT(*) AS count").
+		Where("library_id IN ? AND deleted_at IS NULL", ids).
+		Group("library_id").
+		Scan(&rows).Error; err != nil {
+		return counts
+	}
+	for _, row := range rows {
+		counts[row.LibraryID] = row.Count
+	}
+	return counts
+}