Fix tool do-after return values (#5764)

Content.Server/Doors/Components/ServerDoorComponent.cs

@@ -705,36 +705,31 @@ namespace Content.Server.Doors.Components
                     {
                         Close();
                     }
-                    return true;
                 }
+
+                // regardless of whether this action actually succeeded, it generated a do-after bar. So prevent other
+                // interactions from happening afterwards by returning true.
+                return true;
             }
 
             // for welding doors
-            if (CanWeldShut && _entMan.TryGetComponent(tool.Owner, out WelderComponent? welder) && welder.Lit)
+            if (_beingWelded || !CanWeldShut || !_entMan.TryGetComponent(tool.Owner, out WelderComponent? welder) || !welder.Lit)
             {
-                if(!_beingWelded)
+                // no interaction occurred
-                {
+                return false;
-                    _beingWelded = true;
+            }
-                    if(await toolSystem.UseTool(eventArgs.Using, eventArgs.User, Owner, 3f, 3f, _weldingQuality, () => CanWeldShut))
+            
-                    {
+            _beingWelded = true;
-                        // just in case
-                        if (!CanWeldShut)
-                        {
-                            return false;
-                        }
 
-                        _beingWelded = false;
+            // perform a do-after delay
-                        IsWeldedShut = !IsWeldedShut;
+            var result = await toolSystem.UseTool(eventArgs.Using, eventArgs.User, Owner, 3f, 3f, _weldingQuality, () => CanWeldShut);
-                        return true;
+
-                    }
+            // if successful, toggle the weld-status (while also ensuring that it can still be welded shut after the delay)
-                    _beingWelded = false;
+            if (result)
-                }
+                IsWeldedShut = CanWeldShut && !IsWeldedShut;
-            }
+
-            else
+            _beingWelded = false;
-            {
+            return true;
-                _beingWelded = false;
-            }
-            return false;
         }
 
         /// <summary>