feat: redesign Android app with animations, charts, profile, and registration

- Register screen with validation (username, email, password, confirm)
- Profile screen with email editing and password change
- User greeting on dashboard showing logged-in username
- 401 auto-logout via SessionManager + AuthInterceptor
- MetricsChart with Canvas line graphs (CPU, RAM, Disk)
- Animated StatCard with counters and icons
- ServerCard with progress bars, pulsating status dot, dynamic elevation
- Shimmer loading placeholders
- Dark mode support with Material3
- Navigation transitions (slide + fade)
- New server rack launcher icon
- Splash screen
- Backend API: register, profile (GET/PUT) endpoints

routes/web.php

@@ -101,5 +101,9 @@ $router->put('/api/servers/:id', [ApiController::class, 'serverUpdate']);
 $router->delete('/api/servers/:id', [ApiController::class, 'serverDelete']);
 $router->get('/api/servers/:id/metrics', [ApiController::class, 'serverMetrics']);
 $router->post('/api/servers/:id/execute', [ApiController::class, 'executeCommand']);
+$router->post('/api/auth/login', [ApiController::class, 'login']);
+$router->post('/api/auth/register', [ApiController::class, 'register']);
 $router->get('/api/users', [ApiController::class, 'users']);
+$router->get('/api/profile', [ApiController::class, 'profile']);
+$router->put('/api/profile', [ApiController::class, 'updateProfile']);
 $router->get('/api/refresh-metrics', [ApiController::class, 'refreshAllMetrics']);