- Drop DB_RESPONSE_ERROR -> REACHED_BOTTOM in win_page_down: a transient
backend error (e.g. sqlite lock) should not force the scroll state
forward, or the user would get stuck mid-conversation expecting more
rows that did not load.
- Trim the _win_printf comment to a single WHY line; the rest belongs in
the originating commit message.
_win_printf skipped buffer/pad append for WIN_CHAT while the user was
scrolled, relying on chatwin_db_history() to replay missed messages on
scroll-down. That replay is unavailable when PREF_DBLOG is "off" (no
write) or "redact" ([REDACTED] body), or when the backend failed to
initialize — in those cases the message was lost.
Introduce log_database_can_recover_messages() and gate the WIN_CHAT
early return on it: when recovery is impossible, fall through and
append to the buffer just like non-chat windows do. Also treat
DB_RESPONSE_ERROR in win_page_down the same as DB_RESPONSE_EMPTY so
the [SCROLLED] indicator doesn't hang when the backend is dead.
Add missing scroll rendering for AI windows in
the title bar draw function. This ensures AI
windows display their scrolled state consistently
with other non-chat window types.
_win_printf used to drop the buffer append and pad render for any window
in paged state, but only WIN_CHAT can recover lost messages via
chatwin_db_history on scroll-down. WIN_MUC, WIN_PRIVATE and WIN_AI have
no such fallback, so incoming and outgoing messages were silently lost
when the user was viewing history. Suppress the buffer/render only for
WIN_CHAT; for the rest, still bump unread_msg but let the message land
in the buffer so it becomes visible on scroll-down.
This also removes the manual paged/unread_msg reset before printing the
user message in cl_ev_send_ai_msg — it was a local workaround for the
same drop and is no longer needed.
The buffer-bottom reset in win_page_down (c167f487) is still required:
it is the only path that clears paged and unread_msg for non-chat
windows when the user scrolls back to the bottom (WIN_SCROLL_REACHED_BOTTOM
is set only on the is_chat DB branch).
