handle errros correctly in the bash tool

internal/permission/permission.go

@@ -1,6 +1,7 @@
 package permission
 
 import (
+	"errors"
 	"sync"
 	"time"
 
@@ -8,6 +9,8 @@ import (
 	"github.com/kujtimiihoxha/termai/internal/pubsub"
 )
 
+var ErrorPermissionDenied = errors.New("permission denied")
+
 type CreatePermissionRequest struct {
 	ToolName    string `json:"tool_name"`
 	Description string `json:"description"`
@@ -15,6 +18,7 @@ type CreatePermissionRequest struct {
 	Params      any    `json:"params"`
 	Path        string `json:"path"`
 }
+
 type PermissionRequest struct {
 	ID          string `json:"id"`
 	SessionID   string `json:"session_id"`