Fix concurrency issues without using Swift 6 mode

Author: pro100filipp

CodeEdit/Features/Editor/TabBar/Tabs/Tab/Models/EditorTabFileObserver.swift

@@ -10,7 +10,9 @@ import SwiftUI
 
 /// Observer ViewModel for tracking file deletion
 @MainActor
-final class EditorTabFileObserver: ObservableObject, @preconcurrency CEWorkspaceFileManagerObserver {
+final class EditorTabFileObserver: ObservableObject,
+    CEWorkspaceFileManagerObserver
+{
     @Published private(set) var isDeleted = false
 
     private let tabFile: CEWorkspaceFile
@@ -19,9 +21,11 @@ final class EditorTabFileObserver: ObservableObject, @preconcurrency CEWorkspace
         self.tabFile = file
     }
 
-    func fileManagerUpdated(updatedItems: Set<CEWorkspaceFile>) {
-        if let parent = tabFile.parent, updatedItems.contains(parent) {
-            isDeleted = tabFile.doesExist == false
+    nonisolated func fileManagerUpdated(updatedItems: Set<CEWorkspaceFile>) {
+        Task { @MainActor in
+            if let parent = tabFile.parent, updatedItems.contains(parent) {
+                isDeleted = tabFile.doesExist == false
+            }
         }
     }
 }