fix: guard clearChangesAndUndoHistory with tab ID check

Prevent clearing another tab's undo state when a background query or
multi-statement execution completes after the user has switched tabs.

Author: datlechin

TablePro/Views/Main/Extensions/MainContentCoordinator+MultiStatement.swift

@@ -134,8 +134,10 @@ extension MainContentCoordinator {
                     updatedTab.errorMessage = nil
                     tabManager.tabs[idx] = updatedTab
 
-                    changeManager.clearChangesAndUndoHistory()
-                    changeManager.reloadVersion += 1
+                    if tabManager.selectedTabId == tabId {
+                        changeManager.clearChangesAndUndoHistory()
+                        changeManager.reloadVersion += 1
+                    }
                 }
             } catch {
                 // Rollback on failure

TablePro/Views/Main/Extensions/MainContentCoordinator+QueryHelpers.swift

@@ -192,7 +192,7 @@ extension MainContentCoordinator {
         // Clear stale edit state immediately so the save banner
         // doesn't linger while Phase 2 metadata loads in background.
         // Only clear if there are no pending edits from the user.
-        if isEditable && !changeManager.hasChanges {
+        if tabManager.selectedTabId == tabId, isEditable, !changeManager.hasChanges {
             changeManager.clearChangesAndUndoHistory()
         }
     }