refactor(ui): strip all dark: Tailwind classes (single-theme product)

Mechanical sweep of 41 files via `perl -i -pe 's{\s+dark:[\w:/\[\]\.\-]+}{}g'`.
All dark: variants were paired with light-mode counterparts already; no
elements relied on a dark:-only style.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/evaluation/evaluation-form-fields.tsx

@@ -207,7 +207,7 @@ export function EvaluationFormFields({
                         className={cn(
                           'flex-1 h-12 rounded-lg border-2 flex items-center justify-center text-sm font-medium transition-all',
                           currentValue === true
-                            ? 'border-emerald-500 bg-emerald-50 text-emerald-700 dark:bg-emerald-950/40 dark:text-emerald-400'
+                            ? 'border-emerald-500 bg-emerald-50 text-emerald-700'
                             : 'border-border hover:border-emerald-300 hover:bg-emerald-50/50',
                           isReadOnly && 'opacity-60 cursor-default',
                         )}
@@ -222,7 +222,7 @@ export function EvaluationFormFields({
                         className={cn(
                           'flex-1 h-12 rounded-lg border-2 flex items-center justify-center text-sm font-medium transition-all',
                           currentValue === false
-                            ? 'border-red-500 bg-red-50 text-red-700 dark:bg-red-950/40 dark:text-red-400'
+                            ? 'border-red-500 bg-red-50 text-red-700'
                             : 'border-border hover:border-red-300 hover:bg-red-50/50',
                           isReadOnly && 'opacity-60 cursor-default',
                         )}