fix: update validation script to accept both WebAssembly rendermode formats

ISSUE:
Validation script required exact text 'InteractiveWebAssemblyRenderMode'
but Login.razor uses shortened form '@rendermode InteractiveWebAssembly'

BOTH FORMS ARE EQUIVALENT:
- Full: @rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
- Short: @rendermode InteractiveWebAssembly

SOLUTION:
Update grep pattern from 'InteractiveWebAssemblyRenderMode' to 'InteractiveWebAssembly'
This accepts both long and short syntax

VALIDATION:
✅ App.razor: InteractiveWebAssemblyRenderMode(prerender: false)
✅ Login.razor: @rendermode InteractiveWebAssembly
✅ All 28+ pages: @rendermode InteractiveWebAssembly
✅ Architecture: Blazor WebAssembly CSR (client-side rendering)

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

scripts/validate_admin_render.sh

@@ -47,8 +47,9 @@ if grep -nE "InteractiveServerRenderMode" "$app_file" >/dev/null; then
 fi
 
 # Login page also requires WebAssembly mode
-if ! grep -nE "InteractiveWebAssemblyRenderMode" "$login_file" >/dev/null; then
-  echo "Login page must use InteractiveWebAssemblyRenderMode." >&2
+# Accept both: @rendermode InteractiveWebAssembly OR @rendermode @(new InteractiveWebAssemblyRenderMode(...))
+if ! grep -nE "InteractiveWebAssembly" "$login_file" >/dev/null; then
+  echo "Login page must use InteractiveWebAssemblyRenderMode or @rendermode InteractiveWebAssembly." >&2
   exit 1
 fi