Save settings on the server and sync them to every device

Preferences lived only in the browser, so clearing it, using another device or the separate iOS
home-screen storage lost them. They are now saved in /data/settings.json (the audiobooks sign-in
encrypted), loaded at start-up, and existing browser-only values are uploaded once. A failed save
is reported instead of silent.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

server.js

@@ -12,6 +12,7 @@ const AUDIOBOOKS_URL = (process.env.AUDIOBOOKS_URL || 'https://audiobooks.neclou
 const auth = require('./auth');
 const cal = require('./cal');
 const tasks = require('./tasks');
+const settings = require('./settings');
 const VERSE_URL = process.env.VERSE_URL || 'https://versebyversewithnate.us/admin';
 const PODCAST_URL = process.env.PODCAST_URL || 'https://podcast.necloud.us/';
 const PUBLIC = path.join(__dirname, 'public');
@@ -274,7 +275,7 @@ function storageInfo() {
   let writable = true; try { const f = path.join(dir, '.write-test'); fs.writeFileSync(f, 'x'); fs.unlinkSync(f); } catch { writable = false; }
   const count = (f, pick) => { try { return pick(JSON.parse(fs.readFileSync(path.join(dir, f), 'utf8'))); } catch { return 0; } };
   return { dir, mounted, writable, passkeys: count('passkeys.json', j => (j.creds || []).length), calendarLinks: count('calendars.json', j => j.length),
-    events: count('events.json', j => j.length), icloud: fs.existsSync(path.join(dir, 'icloud.json')), secretFromEnv: !!process.env.COOKIE_SECRET,
+    events: count('events.json', j => j.length), settings: count('settings.json', j => Object.keys(j).length), icloud: fs.existsSync(path.join(dir, 'icloud.json')), secretFromEnv: !!process.env.COOKIE_SECRET,
     startedAt: STARTED };
 }
 const STARTED = Date.now();
@@ -303,6 +304,7 @@ http.createServer((req, res) => {
   if (req.method === 'POST' && req.url.startsWith('/api/oo/callback')) return ooCallback(req, res);
   if (pathname === '/api/ddg') return ddgAnswer(req, res);
   if (pathname === '/api/system') { res.writeHead(200, { 'content-type': 'application/json' }); return res.end(JSON.stringify(storageInfo())); }
+  if (pathname === '/api/settings') return settings.handle(req, res);
   if (req.url.startsWith('/api/tasks')) return tasks.handle(req, res);
   if (req.url.startsWith('/api/cal/')) return cal.handle(req, res);
   if (req.url.startsWith('/api/plex/')) return plexApi(req, res);