refactor(kefin-tweaks): use the standard ListItem/disabledByAdmin pattern

Rebuild the KefinTweaks toggle on ListGroup + ListItem like the other
plugin settings: drop the bespoke card, the red label, the custom switch
colours, and the `t("Watchlist On")`/`t("Watchlist Off")` literal-as-key
strings. The admin lock now shows via the ListItem subtitle instead of
wrapping the whole screen in DisabledSetting.

components/settings/KefinTweaks.tsx

@@ -1,33 +1,28 @@
 import { useTranslation } from "react-i18next";
-import { Switch, Text, View } from "react-native";
+import { Switch } from "react-native";
 import { useSettings } from "@/utils/atoms/settings";
+import { ListGroup } from "../list/ListGroup";
+import { ListItem } from "../list/ListItem";
 
 export const KefinTweaksSettings = () => {
-  const { settings, updateSettings } = useSettings();
+  const { settings, updateSettings, pluginSettings } = useSettings();
   const { t } = useTranslation();
 
   const isEnabled = settings?.useKefinTweaks ?? false;
+  const locked = pluginSettings?.useKefinTweaks?.locked === true;
 
   return (
-    <View className=''>
-      <View className='flex flex-col rounded-xl overflow-hidden p-4 bg-neutral-900'>
-        <Text className='text-xs text-red-600 mb-2'>
-          {t("home.settings.plugins.kefinTweaks.watchlist_enabler")}
-        </Text>
-
-        <View className='flex flex-row items-center justify-between mt-2'>
-          <Text className='text-white'>
-            {isEnabled ? t("Watchlist On") : t("Watchlist Off")}
-          </Text>
-
-          <Switch
-            value={isEnabled}
-            onValueChange={(value) => updateSettings({ useKefinTweaks: value })}
-            trackColor={{ false: "#555", true: "purple" }}
-            thumbColor={isEnabled ? "#fff" : "#ccc"}
-          />
-        </View>
-      </View>
-    </View>
+    <ListGroup>
+      <ListItem
+        title={t("home.settings.plugins.kefinTweaks.watchlist_enabler")}
+        disabledByAdmin={locked}
+      >
+        <Switch
+          value={isEnabled}
+          disabled={locked}
+          onValueChange={(value) => updateSettings({ useKefinTweaks: value })}
+        />
+      </ListItem>
+    </ListGroup>
   );
 };