Show read-only server reading hours in settings

public/settings-nav.js

@@ -3,6 +3,7 @@
 // Two navigation levels; scraper tabs stay within their section, not another menu.
 const SETTINGS_SECTIONS = [
   { id: 'user/reading', group: 'User', title: 'Reading', hint: 'Reader modes, page spacing and zoom.' },
+  { id: 'user/reading-hours', group: 'User', title: 'Reading hours', hint: 'When this server allows chapter reading.' },
   { id: 'user/reading-time', group: 'User', title: 'Reading time & privacy', hint: 'Your clock, Reading Story and personal data.' },
   { id: 'user/notifications', group: 'User', title: 'Notifications', hint: 'Chapter alerts and your optional webhook.' },
   { id: 'user/account', group: 'User', title: 'Account', hint: 'Your account and password.' },
@@ -15,6 +16,15 @@ const SETTINGS_SECTIONS = [
   { id: 'admin/health', group: 'Admin', title: 'Service health', hint: 'Service status, incidents and recovery.', href: 'health.html' },
 ];
 const SCRAPER_TABS = ['activity', 'queue', 'updates', 'sources'];
+const READING_DAYS = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
+
+function readingDayText(schedule, index) {
+  const previous = (index + 6) % 7;
+  const carried = schedule.days[previous].filter(([start, end]) => end < start)
+    .map(([, end]) => `00:00–${end} (from ${READING_DAYS[previous]})`);
+  const starting = schedule.days[index].map(([start, end]) => `${start}–${end}${end < start ? ' (next day)' : ''}`);
+  return [...carried, ...starting].join(' · ') || 'Closed all day';
+}
 
 function settingsRoute(hash, admin) {
   const parts = String(hash || '').replace(/^#/, '').split('/');
@@ -59,4 +69,4 @@ function settingsShell(me, active = 'user/reading') {
   return { content, titleRow, select };
 }
 
-if (typeof module !== 'undefined') module.exports = { SETTINGS_SECTIONS, SCRAPER_TABS, settingsRoute };
+if (typeof module !== 'undefined') module.exports = { SETTINGS_SECTIONS, SCRAPER_TABS, settingsRoute, readingDayText };