Обновить UI-кнопки и прокрутку

shine-UI/js/app.js

@@ -5,6 +5,7 @@ import {
   syncTrackedRouteHistory,
 } from './router.js';
 import { renderToolbar } from './components/toolbar.js';
+import { attachScrollToBottomButton } from './components/scroll-to-bottom-button.js';
 import { captureClientError, setClientErrorSentNotifier, setClientErrorTransport } from './services/client-error-reporter.js';
 import { initPwaInstallPromptHandling } from './services/pwa-install-service.js';
 import { initPwaPush } from './services/pwa-push-service.js';
@@ -190,6 +191,15 @@ let initialConnectionCompleted = false;
 let orientationLockInFlight = false;
 let currentChromeCleanup = null;
 const CALL_PUSH_PENDING_ACTION_KEY = 'shine-ui-call-push-pending-action-v1';
+const SCROLL_TO_BOTTOM_PAGE_IDS = new Set([
+  'messages-list',
+  'chat-view',
+  'channels-list',
+  'channel-view',
+  'channel-thread-view',
+  'notifications-view',
+]);
+
 const GUEST_ALLOWED_PAGES = new Set([
   'start-view',
   'entry-settings-view',
@@ -1128,6 +1138,14 @@ function renderPageFailureFallback(pageId, error) {
   refreshConnectionUi();
 }
 
+function attachPageScrollToBottom(pageId, screen) {
+  if (!SCROLL_TO_BOTTOM_PAGE_IDS.has(pageId)) return null;
+
+  return attachScrollToBottomButton({
+    scrollContainer: () => screen.querySelector('.dm-chat-wrap') || screenEl,
+  });
+}
+
 function renderApp() {
   syncTrackedRouteHistory(window.location.pathname || '/');
   const route = getRoute();
@@ -1164,7 +1182,12 @@ function renderApp() {
     }
 
     screenEl.append(screen);
-    currentCleanup = typeof screen.cleanup === 'function' ? screen.cleanup : null;
+    const pageCleanup = typeof screen.cleanup === 'function' ? screen.cleanup : null;
+    const scrollToBottomControl = attachPageScrollToBottom(pageId, screen);
+    currentCleanup = () => {
+      pageCleanup?.();
+      scrollToBottomControl?.cleanup();
+    };
 
     screenEl.classList.toggle('no-app-chrome', !showAppChrome);
     screenEl.classList.toggle('preauth-flow', PRE_AUTH_PAGES.includes(pageId));