chore(ci): guard admin webassembly render mode

scripts/validate_admin_render.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+files=(
+  "TaxBaik.Web/Components/Admin/App.razor"
+  "TaxBaik.Web/Components/Admin/Layout/MainLayout.razor"
+  "TaxBaik.Web/Components/Admin/Pages/Login.razor"
+)
+
+for file in "${files[@]}"; do
+  if [ ! -f "$file" ]; then
+    echo "Missing admin render file: $file" >&2
+    exit 1
+  fi
+done
+
+if grep -nE "InteractiveServerRenderMode|prerender: true" "${files[@]}"; then
+  echo "Admin render mode violation detected." >&2
+  exit 1
+fi
+
+if ! grep -nE "InteractiveWebAssemblyRenderMode\\(prerender: false\\)" "${files[@]}" >/dev/null; then
+  echo "Admin render mode must use InteractiveWebAssemblyRenderMode(prerender: false)." >&2
+  exit 1
+fi
+
+echo "Admin render harness passed."