refactor(cms): deduplicate shared admin components and fix studio batch completion

- fix(studio): stop markBatchDone infinite recursion so batches complete
- refactor(api): merge api-response into api and drop the duplicate module
- refactor(media): extract shared media loader and URL validator
- refactor(ui): extract shared LoadingSpinner for site and admin groups
- refactor(dates): consolidate raw date formatting into formatDate util
- refactor(logs): share a single generic log-list loader across tables
- refactor(theme): merge both ColorField components and reuse contrast helpers
- refactor(import): extract shared ImportErrorBanner and SearchInput
- chore(): remove dead theme-editor-tabs after inlining tab components

src/app/admin/photos/page.tsx

@@ -9,6 +9,7 @@ import Link from "@/components/link";
 import { Button } from "@/components/ui/button";
 import { calcPagination, parseListParams } from "@/lib/admin-helpers";
 import { CameraWeb, db, User } from "@/lib/db";
+import { formatDate } from "@/lib/format-date";
 import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";
 
 export default async function AdminPhotos({
@@ -133,11 +134,7 @@ export default async function AdminPhotos({
 											>
 												{t("byUser", { username })}
 											</Link>{" "}
-											·{" "}
-											{new Date(p.timestamp * 1000)
-												.toISOString()
-												.slice(0, 16)
-												.replace("T", " ")}
+											· {formatDate(new Date(p.timestamp * 1000))}
 										</p>
 										{canEdit ? (
 											<form