chat: stick-to-bottom auto-scroll with jump-to-latest button

Auto-scroll now yields when the reader scrolls away from the bottom, so a fast-streaming reply no longer fights someone reading the start. Stickiness is a flag driven by a passive scroll listener (not a per-flush distance check, which breaks when one flush adds more than the threshold of content); scrolling back within the band re-arms it. Centralised in chat-session.js (_scrollToBottom(force) + _forceScrollToBottom + _messagesContainer hook), removing the duplicated overrides in copilot.js / chat-page.js. Force-scroll is used where the latest must be shown: history load, chat reopen, approval/clarification prompts, and message send. A sticky 'jump to latest' affordance appears only while scrolled up.
2026-07-24 21:06:04 +01:00
parent d1d0a2af26
commit db6e395c11
7 changed files with 140 additions and 19 deletions
@@ -68,6 +68,7 @@ export default {
  'chat.reasoning':     'Raisonnement…',
  'chat.attach':        'Joindre des fichiers',
  'chat.new_session':   'Nouvelle conversation',
+  'chat.scroll_to_latest': 'Aller aux derniers messages',
  'chat.security_group': 'Groupe de sécurité',
  'chat.collapse':      'Masquer la discussion',
  'chat.close_tab':     'Fermer l\'onglet',