feat: add LiveMapPage for real-time vehicle tracking and ScheduleCenterPage for schedule management

- Implemented LiveMapPage with vehicle tracking using Leaflet and real-time updates.
- Added vehicle icons, status labels, and filtering options for routes.
- Created ScheduleCenterPage to display schedule versions, conflicts, and gaps.
- Introduced responsive design for both pages with dedicated CSS styles.
- Integrated API calls for fetching routes and vehicle data.

backend/src/routes/api.js

@@ -15,6 +15,7 @@ const { createPassengerTelemetryRateLimiter } = require('../middleware/passenger
 const { authenticateToken, requireAdmin } = require('../middleware/auth');
 const { resolveCity } = require('../middleware/city');
 const qualityController = require('../controllers/qualityController');
+const scheduleCenterController = require('../controllers/scheduleCenterController');
 
 // City catalogue is global. Every transport-data endpoint below receives a
 // verified city context from X-City-Id (or falls back to the legacy Polotsk city).
@@ -23,6 +24,7 @@ router.use(resolveCity);
 
 router.use('/schedule-import', require('./scheduleImport'));
 router.get('/quality', authenticateToken, requireAdmin, qualityController.getReport.bind(qualityController));
+router.get('/schedule-center', authenticateToken, requireAdmin, scheduleCenterController.getOverview.bind(scheduleCenterController));
 
 // Routes
 router.get('/routes', routesController.getAllRoutes.bind(routesController));