revert: restore pre-upstream-merge baseline (tree of 3b673150b)

Roll the tree back to the pre-merge tip 3b673150b, undoing the upstream sync merge 72f4f186d (303 files) and the 13 post-merge commits layered on top of it.

Purpose: restore the last pre-sync baseline so the reported OMEMO/OTR encryption regressions can be reproduced against a known-good state and the upstream sync ruled in or out as the cause. Nothing is dropped from history; the merge and every post-merge commit remain reachable and can be cherry-picked back selectively.

Baseline:     3b673150b chore(chatlog): disable background message file logging (stage 1)

Undoes merge: 72f4f186d merge: sync upstream profanity-im/profanity

tests/unittests/ui/stub_ui.c

@@ -1,11 +1,3 @@
-/*
- * stub_ui.c
- *
- * Copyright (C) 2015 - 2018 James Booth <boothj5@gmail.com>
- * Copyright (C) 2019 - 2026 Michael Vetter <jubalh@iodoru.org>
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
 #include "config.h"
 
 #include <glib.h>
@@ -62,14 +54,6 @@ ui_init(void)
 {
 }
 void
-ui_suspend(void)
-{
-}
-void
-ui_resume(void)
-{
-}
-void
 ui_load_colours(void)
 {
 }
@@ -85,10 +69,6 @@ void
 ui_resize(void)
 {
 }
-void
-prof_doupdate(void)
-{
-}
 
 void
 ui_focus_win(ProfWin* win)
@@ -1025,10 +1005,6 @@ cons_splash_setting(void)
 {
 }
 void
-cons_spellcheck_setting(void)
-{
-}
-void
 cons_vercheck_setting(void)
 {
 }
@@ -1344,22 +1320,6 @@ win_refresh_with_subwin(ProfWin* window)
 {
 }
 
-gboolean
-win_warn_needed(ProfWin* window, const char* const type, const char* const jid)
-{
-    return TRUE;
-}
-
-void
-win_warn_sent(ProfWin* window, const char* const type, const char* const jid)
-{
-}
-
-void
-win_clear_warned_jids(ProfWin* window)
-{
-}
-
 void
 win_println(ProfWin* window, theme_item_t theme, const char* ch, const char* const message, ...)
 {
@@ -1473,19 +1433,3 @@ cons_has_alerts(void)
 {
     return FALSE;
 }
-
-gboolean
-ui_is_suspended(void)
-{
-    return FALSE;
-}
-
-void
-ui_beep(void)
-{
-}
-
-void
-ui_flash(void)
-{
-}