Refactor InfoPanel: non-generic, nested grid support

- Replace generic InfoPanel with non-generic version using IInfoPanelBase
- Add ParentGrid, GetRootGrid, and InfoPanelInstance to IMgGridBase for nested grid hierarchy
- Only root grid displays InfoPanel; nested grids inherit context
- InfoPanel now handles any data type via reflection and object
- All grid-to-InfoPanel communication routed through root grid
- Add option to show/hide readonly fields in edit mode
- Improve InfoPanel CSS for up to 4 responsive columns
- Remove redundant code and add debug output for InfoPanel data flow

FruitBankHybrid.Shared/Components/MgGridBase.cs

@@ -26,6 +26,24 @@ public class MgGridBase : DxGrid, IMgGridBase
     /// <inheritdoc />
     public MgGridEditState GridEditState { get; private set; } = MgGridEditState.None;
 
+    /// <inheritdoc />
+    [CascadingParameter]
+    public IMgGridBase? ParentGrid { get; set; }
+
+    /// <inheritdoc />
+    public IMgGridBase GetRootGrid()
+    {
+        var current = (IMgGridBase)this;
+        while (current.ParentGrid != null)
+        {
+            current = current.ParentGrid;
+        }
+        return current;
+    }
+    
+    /// <inheritdoc />
+    public IInfoPanelBase? InfoPanelInstance { get; set; }
+
     [Inject] public required IEnumerable<IAcLogWriterClientBase> LogWriters { get; set; }
     [Inject] public required FruitBankSignalRClient FruitBankSignalRClient { get; set; }
     [Inject] public required LoggedInModel LoggedInModel { get; set; }
@@ -170,6 +188,8 @@ public class MgGridBase : DxGrid, IMgGridBase
         }
     }
 
+    public bool ShowInfoPanel { get; set; } = false;
+
     async Task Grid_LayoutAutoLoading(GridPersistentLayoutEventArgs e)
     {
         e.Layout = await LoadLayoutFromLocalStorageAsync($"{AutoSaveLayoutName}_AutoSave_{LoggedInModel.CustomerDto?.Id ?? 0}");