Feature-based folder structure

1. Created feature-based folder structure - Components now organized by domain feature
  2. Moved all components - 20+ files moved to new locations
  3. Updated _Imports.razor - Added all new namespace paths for global component access
  4. Updated CustomThemes.cs namespace - Changed from WebApp.Components.Layout to WebApp.Components.Shared.Layout
  5. Removed old using directives - Cleaned up Login.razor and Routes.razor
  6. Removed empty directories - Cleaned up old folder structure

WebApp/Components/Shared/Layout/MainLayout.razor

@@ -0,0 +1,43 @@
+@inherits LayoutComponentBase
+@inject IConfiguration Configuration
+
+<MudThemeProvider Theme="CustomThemes.Ceruleantheme" />
+<MudPopoverProvider />
+<MudDialogProvider />
+
+<MudLayout>
+    <MudAppBar Class="no-print">
+        <MudIconButton Icon="@Icons.Material.Filled.Menu" Color="Color.Inherit" Edge="Edge.Start" OnClick="@((e) => DrawerToggle())" />
+        TSA Chapter Organizer - @Configuration["ChapterSettings:Name"]
+        <MudSpacer />
+        <AuthorizeView>
+            <MudText Typo="Typo.body2">Logged in</MudText>
+            
+            <form action="Auth/CookieLogout" method="post">
+                <button type="submit" class="btn btn-primary">Logout</button>
+            </form>
+        </AuthorizeView>
+    </MudAppBar>
+    <MudDrawer @bind-Open="@_drawerOpen" Class="no-print">
+        <NavMenu/>
+    </MudDrawer>
+    <MudMainContent>
+        <MudContainer MaxWidth="MaxWidth.ExtraLarge">
+        @Body
+        </MudContainer>
+    </MudMainContent>
+</MudLayout>
+@code {
+    bool _drawerOpen = true;
+
+    void DrawerToggle()
+    {
+        _drawerOpen = !_drawerOpen;
+    }
+}
+
+<div id="blazor-error-ui">
+    An unhandled error has occurred.
+    <a href="" class="reload">Reload</a>
+    <a class="dismiss">🗙</a>
+</div>