feat: implement night mode functionality with UI updates and journey tracking

- Added NightScreen component for displaying night mode information and alerts.
- Introduced NextStops component to show upcoming stops during a journey.
- Implemented logic for determining night mode activation based on schedule and user settings.
- Created journey utility functions to manage onward journey data and stop information.
- Updated tests to cover new night mode features and journey logic.
- Added fixture for testing night mode scenarios with specific timestamps.
- Removed QR code from night screen for a cleaner UI experience.
- Enhanced admin settings to manage night mode configurations.

test/storage.test.mjs

@@ -2,6 +2,13 @@ import test from 'node:test';
 import assert from 'node:assert/strict';
 import { readSnapshot, writeSnapshot, readTimetable, writeTimetable, readWeather, writeWeather, readSettings, saveSettings } from '../src/lib/storage.ts';
 
+test('night settings migrate and persist, with invalid values falling back to supported defaults', () => {
+  const values = new Map(); globalThis.localStorage = { getItem:key=>values.get(key)||null, setItem:(key,value)=>values.set(key,value) };
+  const old = readSettings();assert.equal(old.nightMode,'auto');assert.equal(old.nightWakeMinutes,60);
+  saveSettings({...old,nightMode:'off',nightWakeMinutes:45});assert.equal(readSettings().nightMode,'off');assert.equal(readSettings().nightWakeMinutes,45);
+  values.set('ridebus-board-settings-v1',JSON.stringify({nightMode:'always',nightWakeMinutes:5}));assert.equal(readSettings().nightMode,'auto');assert.equal(readSettings().nightWakeMinutes,60);
+});
+
 const data = { cityId: 1, stop: { id: 1, name: 'Швейная фабрика' }, mode: 'live', serviceDate: '2026-10-08', updatedAt: '2026-10-08T12:00:00+03:00', routes: [], alerts: [],
   departures: [{ id: '1:12:30', scheduledAt: '2026-10-08T12:30:00+03:00' }] };