fix(WP-0017/E3): Layer 3 error fixes — controllers and views

Fix compilation errors across 6 controllers and 29 views: import cleanup,
ResponseException pattern for API auth, type fixes, unused import removal.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/View/DeploymentRecords/Show.hs

@@ -183,7 +183,6 @@ renderNoEvaluationForm :: Id DeploymentRecord -> Html
 renderNoEvaluationForm deploymentRecordId = [hsx|
     <form method="POST" action={EvaluateChangeAction deploymentRecordId}
           class="space-y-3">
-        {hiddenField "authenticity_token"}
         <div>
             <label class="block text-xs font-medium text-gray-600 mb-1">
                 Score (1–5) <span class="text-red-500">*</span>