Fix: TagBox reloads on in-place Data refill

Improved MgGridFilterPanelTagBox<TData, TValue> to detect in-place Data collection refills and trigger DevExpress editor Reload(), ensuring tags resolve when the collection is updated without changing its reference. Updated MGGRID_PARAMETERS.md to document this behavior and clarify why Reload() is needed for in-place fills.

AyCode.Blazor.Components/Components/Grids/MgGridFilterPanelTagBox.cs

@@ -59,6 +59,7 @@ public class MgGridFilterPanelTagBox<TData, TValue> : MgTagBox<TData, TValue>, I
             // fill the SAME instance later (AcObservableCollection.Replace) — the reference never changes, only
             // the count does (0 => N). Count() is O(1) for ICollection-backed lookups.
             var dataCount = Data?.Count() ?? -1;
+            var sameInstanceRefilled = ReferenceEquals(Data, _lastSyncedData) && dataCount != _lastSyncedDataCount;
             var dataChanged = !ReferenceEquals(Data, _lastSyncedData) || dataCount != _lastSyncedDataCount;
             var selectionDrifted = Values is null || !Values.SequenceEqual(criteriaValues);
 
@@ -66,6 +67,12 @@ public class MgGridFilterPanelTagBox<TData, TValue> : MgTagBox<TData, TValue>, I
             {
                 _lastSyncedData = Data;
                 _lastSyncedDataCount = dataCount;
+
+                // DevExpress snapshots the editor's item list and detects Data changes BY REFERENCE — an in-place
+                // fill is invisible to it, so the re-asserted Values could never resolve into tags (re-rendering
+                // does not help). Reload() (DxListEditorBase) forces the editor to re-read its Data source.
+                if (sameInstanceRefilled) Reload();
+
                 SetValuesCore(criteriaValues);
             }
         }