fix(#93): migrate hardcoded text-gray-400/500 to semantic ink tokens

enrich/+page.svelte back link: text-gray-500 → text-ink-2 / hover:text-ink
enrich/done/+page.svelte body text: text-gray-500 → text-ink-2
enrich/done/+page.svelte list link: text-gray-400 (2.6:1, fails AA) → text-ink-2

Root fix for section label contrast (text-ink-3 uppercase pattern used
app-wide) is in PR #107 via the ink-3 token value change.

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

frontend/src/routes/enrich/+page.svelte

@@ -19,7 +19,7 @@ function formatUploadDate(createdAt: string): string {
 	<!-- Back Link -->
 	<a
 		href="/"
-		class="group mb-4 inline-flex items-center font-sans text-xs font-bold tracking-widest text-gray-500 uppercase transition-colors hover:text-brand-navy"
+		class="group mb-4 inline-flex items-center font-sans text-xs font-bold tracking-widest text-ink-2 uppercase transition-colors hover:text-ink"
 	>
 		<img
 			src="/degruyter-icons/Simple/Medium-24px/SVG/Action/Arrow/Arrow-Left-MD.svg"
@@ -76,8 +76,8 @@ function formatUploadDate(createdAt: string): string {
 		</div>
 	{:else}
 		<!-- Document Rows -->
-		<div class="border-brand-sand border bg-white shadow-sm">
-			<ul class="divide-brand-sand divide-y">
+		<div class="border border-line bg-white shadow-sm">
+			<ul class="divide-y divide-line-2">
 				{#each documents as doc (doc.id)}
 					<li class="group hover:bg-brand-sand/30 transition-colors duration-200">
 						<a href="/enrich/{doc.id}" class="flex items-center justify-between p-6">