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/settings/advanced-settings-panel.tsx

@@ -1,12 +1,13 @@
 "use client";
 
-import { Search, Trash2 } from "lucide-react";
+import { Trash2 } from "lucide-react";
 import { useMemo, useState } from "react";
 import {
 	createSetting,
 	deleteSetting,
 	updateSetting,
 } from "@/actions/admin-settings";
+import { SearchInput } from "@/components/admin/search-input";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { MANAGED_SETTING_KEYS } from "./cms-settings-config";
@@ -64,15 +65,11 @@ export function AdvancedSettingsPanel({
 				</label>
 			</div>
 
-			<div className="relative">
-				<Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground" />
-				<Input
-					value={query}
-					onChange={(e) => setQuery(e.target.value)}
-					placeholder="Search keys, values, comments…"
-					className="pl-9"
-				/>
-			</div>
+			<SearchInput
+				value={query}
+				onChange={setQuery}
+				placeholder="Search keys, values, comments…"
+			/>
 
 			{canEdit ? (
 				<form