InfoPanel: custom edit templates & null edit model fix

- Add InfoPanelEditTemplate to MgGridDataColumn for custom InfoPanel editors with refresh support
- Introduce MgGridInfoPanelEditContext for edit context/refresh
- Harden OnCustomizeEditModel to handle null edit models, preventing InfoPanel crashes and logging warnings
- Update docs: usage, editor resolution order, and new issue entry (ACBLAZOR-GRID-I-N7K2)
- Refactor grid templates to use new features and ensure consistent editor behavior
- Minor doc and formatting improvements

FruitBankHybrid.Shared/Components/GridProductDtoTemplate.razor

@@ -30,7 +30,7 @@
 				<DxGridDataColumn FieldName="StockQuantity" />
 				<DxGridDataColumn FieldName="IncomingQuantity" ReadOnly="true" />
 				<DxGridDataColumn FieldName="NetWeight" ReadOnly="true" />
-				<DxGridDataColumn FieldName="IsMeasurable" />
+				<DxGridDataColumn FieldName="IsMeasurable" ReadOnly="true" />
 				<DxGridDataColumn FieldName="Tare" Caption="Tára súly" ReadOnly="true" />
 				<DxGridDataColumn FieldName="AverageWeight" ReadOnly="true" />
 				<DxGridDataColumn FieldName="AverageWeightTreshold" ReadOnly="true" />
@@ -76,7 +76,8 @@
 			<ToolbarTemplate>
 				@if (IsMasterGrid)
 				{
-					<MgGridToolbarTemplate Grid="Grid" OnReloadDataClick="() => ReloadDataFromDb(true)" />
+					@* Termék-létrehozás/szerkesztés a nopadmin felületén történik — ez a grid csak listáz (nincs Add/Update SignalR tag) *@
+					<MgGridToolbarTemplate Grid="Grid" EnableNew="false" EnableEdit="false" OnReloadDataClick="() => ReloadDataFromDb(true)" />
 				}
 			</ToolbarTemplate>
 		</GridProductDto>

FruitBankHybrid.Shared/Components/GridShippingDocument.razor

@@ -25,7 +25,7 @@
 								  ParentDataItem="@ParentDataItem" Logger="_logger" ValidationEnabled="false" EditMode="GridEditMode.EditRow" OnGridFocusedRowChanged="Grid_FocusedRowChanged">
 			<Columns>
 				<MgGridDataColumn FieldName="Id" SortIndex="0" SortOrder="GridColumnSortOrder.Descending" ReadOnly="true"/>
-				<DxGridDataColumn FieldName="PartnerId" Caption="Partner" Visible="@(!ParentDataItemIsPartner)" ReadOnly="@ParentDataItemIsPartner">
+				<MgGridDataColumn FieldName="PartnerId" Caption="Partner" TextAlignment="GridTextAlignment.Left" Visible="@(!ParentDataItemIsPartner)" ReadOnly="@ParentDataItemIsPartner">
 					<CellDisplayTemplate>
 							@{
 								var sdPd = (ShippingDocument)context.DataItem;
@@ -33,57 +33,28 @@
 							}
 						</CellDisplayTemplate>
 						<CellEditTemplate>
-							@{
+							@PartnerEditor((ShippingDocument)context.EditModel)
-								var sdPe = (ShippingDocument)context.EditModel;
-							}
-							<DxComboBox TData="Partner" TValue="int"
-										Data="@Partners"
-										Value="@sdPe.PartnerId"
-										ValueChanged="@((int v) => OnPartnerChanged(sdPe, v))"
-										ValueExpression="@(() => sdPe.PartnerId)"
-										ValueFieldName="@nameof(Partner.Id)"
-										TextFieldName="@nameof(Partner.Name)"
-										DropDownBodyCssClass="dd-body-class"
-										ListRenderMode="ListRenderMode.Entire"
-										SearchMode="ListSearchMode.AutoSearch"
-										SearchFilterCondition="ListSearchFilterCondition.Contains"
-										ClearButtonDisplayMode="DataEditorClearButtonDisplayMode.Auto">
-								<Columns>
-									<DxListEditorColumn FieldName="@nameof(Partner.Id)" />
-									<DxListEditorColumn FieldName="@nameof(Partner.Name)" />
-									<DxListEditorColumn FieldName="@nameof(Partner.TaxId)" />
-								</Columns>
-							</DxComboBox>
 						</CellEditTemplate>
-				</DxGridDataColumn>
+						<InfoPanelEditTemplate>
-				<DxGridDataColumn FieldName="PartnerDepotId" Caption="Telephely">
+							@PartnerEditor((ShippingDocument)context.EditModel, context.Refresh)
+						</InfoPanelEditTemplate>
+				</MgGridDataColumn>
+				<MgGridDataColumn FieldName="PartnerDepotId" Caption="Telephely" TextAlignment="GridTextAlignment.Left">
 						<CellDisplayTemplate>
 						@{
 							var sdD = (ShippingDocument)context.DataItem;
 							var depotD = PartnersDictById.GetValueOrDefault(sdD.PartnerId)?.PartnerDepots?.FirstOrDefault(d => d.Id == sdD.PartnerDepotId);
 
-							<div style="text-align:left">@depotD?.Name</div>
+							<text>@depotD?.Name</text>
 						}
 						</CellDisplayTemplate>
 						<CellEditTemplate>
-							@{
+							@DepotEditor((ShippingDocument)context.EditModel)
-								var sdE = (ShippingDocument)context.EditModel;
-								var depotsE = PartnersDictById.GetValueOrDefault(sdE.PartnerId)?.PartnerDepots ?? new List<PartnerDepot>();
-							}
-							<DxComboBox TData="PartnerDepot" TValue="int?"
-										Data="@depotsE"
-										@bind-Value="sdE.PartnerDepotId"
-										ValueFieldName="@nameof(PartnerDepot.Id)"
-										TextFieldName="@nameof(PartnerDepot.Name)"
-										NullText="(telephely…)"
-										ClearButtonDisplayMode="DataEditorClearButtonDisplayMode.Auto">
-								<Columns>
-									<DxListEditorColumn FieldName="@nameof(PartnerDepot.Name)" Caption="Név" />
-									<DxListEditorColumn FieldName="@nameof(PartnerDepot.FullAddress)" Caption="Cím" />
-								</Columns>
-							</DxComboBox>
 						</CellEditTemplate>
-					</DxGridDataColumn>
+						<InfoPanelEditTemplate>
+							@DepotEditor((ShippingDocument)context.EditModel)
+						</InfoPanelEditTemplate>
+					</MgGridDataColumn>
 					<DxGridDataColumn FieldName="Shipping.ShippingDate" Caption="Beérkezés" ReadOnly="true" />
 				<DxGridDataColumn FieldName="ShippingId" Caption="Shipping" Visible="@(!ParentDataItemIsShipping)" ReadOnly="@ParentDataItemIsShipping">
 					<EditSettings>
@@ -327,6 +298,43 @@
 		StateHasChanged();
 	}
 
+	// Közös Partner/Telephely editorok: a grid-cella (CellEditTemplate) és az InfoPanel (InfoPanelEditTemplate)
+	// ugyanazt a combobox-ot kapja. A refresh a panel újrarenderelése (kaszkád: partner-váltás után frissüljön
+	// a Telephely-combo listája) — a grid-cellás útnál nem kell, ott a grid maga újrarenderel.
+	private RenderFragment PartnerEditor(ShippingDocument sd, Action? refresh = null) =>
+		@<DxComboBox TData="Partner" TValue="int"
+					 Data="@Partners"
+					 Value="@sd.PartnerId"
+					 ValueChanged="@((int v) => { OnPartnerChanged(sd, v); refresh?.Invoke(); })"
+					 ValueExpression="@(() => sd.PartnerId)"
+					 ValueFieldName="@nameof(Partner.Id)"
+					 TextFieldName="@nameof(Partner.Name)"
+					 DropDownBodyCssClass="dd-body-class"
+					 ListRenderMode="ListRenderMode.Entire"
+					 SearchMode="ListSearchMode.AutoSearch"
+					 SearchFilterCondition="ListSearchFilterCondition.Contains"
+					 ClearButtonDisplayMode="DataEditorClearButtonDisplayMode.Auto">
+			<Columns>
+				<DxListEditorColumn FieldName="@nameof(Partner.Id)" />
+				<DxListEditorColumn FieldName="@nameof(Partner.Name)" />
+				<DxListEditorColumn FieldName="@nameof(Partner.TaxId)" />
+			</Columns>
+		</DxComboBox>;
+
+	private RenderFragment DepotEditor(ShippingDocument sd) =>
+		@<DxComboBox TData="PartnerDepot" TValue="int?"
+					 Data="@(PartnersDictById.GetValueOrDefault(sd.PartnerId)?.PartnerDepots ?? new List<PartnerDepot>())"
+					 @bind-Value="sd.PartnerDepotId"
+					 ValueFieldName="@nameof(PartnerDepot.Id)"
+					 TextFieldName="@nameof(PartnerDepot.Name)"
+					 NullText="(telephely…)"
+					 ClearButtonDisplayMode="DataEditorClearButtonDisplayMode.Auto">
+			<Columns>
+				<DxListEditorColumn FieldName="@nameof(PartnerDepot.Name)" Caption="Név" />
+				<DxListEditorColumn FieldName="@nameof(PartnerDepot.FullAddress)" Caption="Cím" />
+			</Columns>
+		</DxComboBox>;
+
 	protected async Task OnActiveTabChanged(int activeTabIndex)
 	{
 		_activeTabIndex = activeTabIndex;