Clean up code formatting and enhance data immutability

Standardized spacing and removed extraneous white space across multiple files for better readability. Updated several data grids to use `readonly` for `_data` collections, improving immutability and code clarity.

IGP/Pages/DataTables/Parts/WeaponTable.razor

@@ -1,5 +1,5 @@
-<MudDataGrid T="EntityWeaponModel" Items="@_data" 
-             SortMode="SortMode.Multiple" 
+<MudDataGrid T="EntityWeaponModel" Items="@_data"
+             SortMode="SortMode.Multiple"
              Filterable="true"
              Hideable="true">
     <Columns>
@@ -17,13 +17,15 @@
         <PropertyColumn Property="x => x.Parent.GetImmortal()" Title="Immortal"/>
     </Columns>
     <PagerContent>
-        <MudDataGridPager T="EntityWeaponModel" />
+        <MudDataGridPager T="EntityWeaponModel"/>
     </PagerContent>
 </MudDataGrid>
 
 @code {
-    IEnumerable<EntityWeaponModel> _data = DATA.Get()
+
+    readonly IEnumerable<EntityWeaponModel> _data = DATA.Get()
         .SelectMany(e => e.Value.EntityParts)
         .OfType<EntityWeaponModel>()
         .ToList();
+
 }