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/app/(admin)/admin/projects/bulk-upload/page.tsx

@@ -462,7 +462,7 @@ export default function BulkUploadPage() {
                         return (
                           <TableRow
                             key={row.project.id}
-                            className={row.isComplete ? 'bg-green-50/50 dark:bg-green-950/10' : ''}
+                            className={row.isComplete ? 'bg-green-50/50' : ''}
                           >
                             <TableCell>
                               <Link