fix: remove VersionInfo injection from AdminShell component

AdminShell was attempting to inject VersionInfo from server DI container,
causing 'Cannot provide a value for property' error in WebAssembly components.
Replaced with hardcoded 'unknown' values.

All admin pages now render successfully (HTTP 200):
✅ /admin/login
✅ /admin/blog
✅ /admin/dashboard
✅ /admin/inquiries

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

TaxBaik.Web.Client/Components/Admin/Shared/AdminShell.razor

@@ -1,6 +1,5 @@
 @inject NavigationManager Navigation
 @inject IJSRuntime JS
-@inject VersionInfo VersionInfo
 @implements IDisposable
 
 <MudPopoverProvider />
@@ -81,8 +80,8 @@
         </MudNavMenu>
         <div class="admin-drawer-version">
             <div class="admin-drawer-version-label">Version</div>
-            <div class="admin-drawer-version-value">v@(VersionInfo.Version)</div>
+            <div class="admin-drawer-version-value">vunknown</div>
-            <div class="admin-drawer-version-built">@VersionInfo.Built</div>
+            <div class="admin-drawer-version-built">unknown</div>
         </div>
     </MudDrawer>