Add active directory management for snapshot operations

Introduced `GetActiveDir` and `CleanActiveDir` methods in the blob store to manage a dedicated directory for active snapshot operations. This ensures a clean working state before starting new operations and prevents conflicts. Updated related logic in snapshot creation and restoration to utilize the active directory.

manager.go

@@ -59,12 +59,20 @@ func (data *SnapshotManagerData) CreateSnapshot(ctx context.Context, sourceDir s
 	// Generate a unique ID for the snapshot
 	snapshotID := uuid.New().String()
 
-	// Create a temporary file for the archive
-	tempFile, err := os.CreateTemp("", "agate-snapshot-*.zip")
-	if err != nil {
-		return nil, fmt.Errorf("failed to create temporary file: %w", err)
+	// Clean the active directory to avoid conflicts
+	if err := data.blobStore.CleanActiveDir(ctx); err != nil {
+		return nil, fmt.Errorf("failed to clean active directory: %w", err)
+	}
+
+	// Get the active directory for operations
+	activeDir := data.blobStore.GetActiveDir()
+
+	// Create a temporary file for the archive in the active directory
+	tempFilePath := filepath.Join(activeDir, "temp-"+snapshotID+".zip")
+	tempFile, err := os.Create(tempFilePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create temporary file in active directory: %w", err)
 	}
-	tempFilePath := tempFile.Name()
 	tempFile.Close()              // Close it as CreateArchive will reopen it
 	defer os.Remove(tempFilePath) // Clean up temp file after we're done
 
@@ -253,8 +261,15 @@ func (data *SnapshotManagerData) ExtractSnapshot(ctx context.Context, snapshotID
 	if snapshotID == "" {
 		return errors.New("snapshot ID cannot be empty")
 	}
+
+	// If no specific path is provided, use the active directory
 	if path == "" {
-		return errors.New("target path cannot be empty")
+		// Clean the active directory to avoid conflicts
+		if err := data.blobStore.CleanActiveDir(ctx); err != nil {
+			return fmt.Errorf("failed to clean active directory: %w", err)
+		}
+
+		path = filepath.Join(data.blobStore.GetActiveDir(), snapshotID)
 	}
 
 	// First check if the snapshot exists