merge: sync upstream profanity-im/profanity

Sync with upstream profanity-im/profanity.

Major upstream changes incorporated:

Memory management
  - Replace malloc+memset with g_new0 throughout codebase
  - Adopt auto_gchar / auto_gcharv / auto_gerror / auto_jid cleanup macros
  - Replace free() with g_free() for GAlloc'd memory

Editor rewrite
  - Remove pthread-based async editor; use GChildWatch callback API
  - New launch_editor(initial_content, callback, user_data) interface
  - Proper signal handling (SIGINT, SIGTSTP, SIGPIPE reset in child)
  - ui_suspend()/ui_resume() integration for TTY management

OMEMO improvements
  - Dual backend support: libsignal-protocol-c and libomemo-c
  - Proper pre-key removal after use (XEP-0384 compliance)
  - Automatic pre-key regeneration when store drops below threshold
  - New functions: omemo_is_device_active(), omemo_is_jid_trusted()
  - omemo_get_jid_untrusted_fingerprints() for better error messages
  - Fingerprint notifications on new device identity discovery
  - Deterministic pre-key ID generation tracking max_pre_key_id
  - omemo_trust_changed() UI updates on trust state changes

JID validation
  - RFC 6122-compliant validation in jid_is_valid()
  - Character-level checks (RFC 6122 forbidden chars: & ' / : < > @)
  - Length limits: 1023 per component, 3071 total
  - New jid_is_valid_user_jid() for user vs. service JID distinction

Database
  - Schema migration v3: UNIQUE constraint on archive_id for deduplication
  - Triggers for corrected message tracking (replaces_db_id / replaced_by_db_id)
  - db_history_result_t return type, _truncate_datetime_suffix()

UI / console
  - win_warn_needed() / win_warn_sent() warning deduplication hash table
  - PAD_MIN_HEIGHT dynamic pad sizing with PAD_THRESHOLD auto-cleanup
  - Spellcheck integration in input field with Unicode word detection
  - cons_spellcheck_setting() for /settings ui output
  - /[command]? shortcut for command help

Account config
  - Account name sanitization for GKeyFile special chars ([ ] = # \n \r)
  - Replace popen() with g_spawn_sync() for eval_password
  - TLS policy: add "direct" option alongside legacy

Connection
  - Port validation with g_assert (0–65535)
  - SHA-256 certificate fingerprint support (XMPP_CERT_PUBKEY_FINGERPRINT_SHA256)
  - "direct" TLS policy alias for legacy SSL

Common utilities
  - str_xml_sanitize() for XML 1.0 illegal character removal
  - string_matches_one_of() with formatted error messages
  - valid_tls_policy_option() helper
  - prof_date_time_format_iso8601() utility
  - Improved strip_arg_quotes() with backslash unescaping
  - prof_occurrences() uses g_slist_prepend + reverse for performance

PGP / OX
  - Proper GPGME resource cleanup with goto-cleanup pattern
  - g_string_free(xmppuri) leak fix in _ox_key_lookup

CSV export
  - Use GString + g_file_set_contents instead of raw write() syscalls

Tests
  - Restructured into subdirectories: command/, config/, xmpp/, ui/, omemo/, otr/, pgp/
  - New test_cmd_ac.c for autocompleter unit tests
  - Updated stubs for new UI suspend/resume functions

License headers
  - Migrate to SPDX-3.0 identifiers (GPL-3.0-or-later WITH OpenSSL-exception)

────────────────────────────────────────────────────
cproof-specific preservations:

  - XEP-0308 LMC: replace_id ?: id logic in message/stanza/omemo
  - Force encryption: cmd_force_encryption, test_forced_encryption
  - CWE-134: format string protection (cons_show("%s", ...))
  - y_start_pos-based paging in window.c
  - db_history_result_t return type, _truncate_datetime_suffix()

Merge-time fixes:

  - common.c: format-security (-Werror) — cons_show(errmsg) → cons_show("%s", errmsg)
  - database.c: null-deref guard — !msg->timestamp → msg && !msg->timestamp
  - console.c: implicit size_t → int cast — (int)(maxlen + 1)
  - tlscerts.c: %d for size_t — %zu

Build system:
  - Kept autotools (Makefile.am, configure.ac); upstream uses Meson
  - Restored deleted files: bootstrap.sh, autogen.sh, ax_valgrind_check.m4, configure-debug
  - Updated Makefile.am test paths for subdirectory structure
  - Added test_cmd_ac, test_forced_encryption to test sources

Functional tests:
  - Use cproof version; upstream requires stbbr_for_xmlns from updated stabber
  - Not yet available in devs/stabber fork

Closes #64

Merge author: jabber.developer2
Commits authors:
 Michael Vetter <jubalh@iodoru.org>
& Steffen Jaeckel <s@jaeckel.eu>

src/profanity.c

@@ -3,35 +3,9 @@
  * vim: expandtab:ts=4:sts=4:sw=4
  *
  * Copyright (C) 2012 - 2019 James Booth <boothj5@gmail.com>
- * Copyright (C) 2019 - 2025 Michael Vetter <jubalh@iodoru.org>
- *
- * This file is part of Profanity.
- *
- * Profanity is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Profanity is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Profanity.  If not, see <https://www.gnu.org/licenses/>.
- *
- * In addition, as a special exception, the copyright holders give permission to
- * link the code of portions of this program with the OpenSSL library under
- * certain conditions as described in each individual source file, and
- * distribute linked combinations including the two.
- *
- * You must obey the GNU General Public License in all respects for all of the
- * code used other than OpenSSL. If you modify file(s) with this exception, you
- * may extend this exception to your version of the file(s), but you are not
- * obligated to do so. If you do not wish to do so, delete this exception
- * statement from your version. If you delete this exception statement from all
- * source files in the program, then also delete it here.
+ * Copyright (C) 2019 - 2026 Michael Vetter <jubalh@iodoru.org>
  *
+ * SPDX-License-Identifier: GPL-3.0-or-later WITH OpenSSL-exception
  */
 #include "config.h"
 #include <unistd.h>
@@ -56,6 +30,7 @@
 #include "config/accounts.h"
 #include "config/preferences.h"
 #include "config/theme.h"
+#include "tools/spellcheck.h"
 #include "config/tlscerts.h"
 #include "config/scripts.h"
 #include "command/cmd_defs.h"
@@ -95,9 +70,6 @@ static void _connect_default(const char* const account);
 pthread_mutex_t lock;
 static gboolean force_quit = FALSE;
 
-// main.c (prof_run section)
-gboolean background_mode = FALSE;
-
 void
 prof_run(gchar* log_level, gchar* account_name, gchar* config_file, gchar* log_file, gchar* theme_name, gchar** commands)
 {
@@ -118,49 +90,47 @@ prof_run(gchar* log_level, gchar* account_name, gchar* config_file, gchar* log_f
     char* line = NULL;
     GTimer* waittimer = g_timer_new();
     g_timer_stop(waittimer);
-    int waittime;
+    int waittime = 0;
     while (cont && !force_quit) {
         log_stderr_handler();
         session_check_autoaway();
 
-        if (!background_mode) {
-            line = commands ? *commands : inp_readline();
-            if (commands && line && memcmp(line, "/sleep", 6) == 0) {
-                if (!g_timer_is_active(waittimer)) {
-                    gchar* err_msg;
-                    if (strtoi_range(line + 7, &waittime, 0, 300, &err_msg)) {
-                        g_timer_start(waittimer);
-                        /* Increase the minimal runtime by the waiting time
-                         * so we can be sure there's runtime left after executing
-                         * the last command.
-                         */
-                        min_runtime += waittime;
-                    } else {
-                        log_error("%s", err_msg);
-                        g_free(err_msg);
-                        commands = NULL;
-                    }
-                } else if (g_timer_elapsed(waittimer, NULL) >= waittime) {
-                    g_timer_stop(waittimer);
-                    commands++;
-                    if (!(*commands))
-                        commands = NULL;
-                }
-                cont = TRUE;
-            } else if (line) {
-                ProfWin* window = wins_get_current();
-                cont = cmd_process_input(window, line);
-                if (commands) {
-                    commands++;
-                    if (!(*commands))
-                        commands = NULL;
+        line = commands ? *commands : inp_readline();
+        if (commands && line && memcmp(line, "/sleep", 6) == 0) {
+            if (!g_timer_is_active(waittimer)) {
+                gchar* err_msg;
+                if (strtoi_range(line + 7, &waittime, 0, 300, &err_msg)) {
+                    g_timer_start(waittimer);
+                    /* Increase the minimal runtime by the waiting time
+                     * so we can be sure there's runtime left after executing
+                     * the last command.
+                     */
+                    min_runtime += waittime;
                 } else {
-                    free(line);
-                    line = NULL;
+                    log_error("%s", err_msg);
+                    g_free(err_msg);
+                    commands = NULL;
                 }
-            } else {
-                cont = TRUE;
+            } else if (g_timer_elapsed(waittimer, NULL) >= waittime) {
+                g_timer_stop(waittimer);
+                commands++;
+                if (!(*commands))
+                    commands = NULL;
             }
+            cont = TRUE;
+        } else if (line) {
+            ProfWin* window = wins_get_current();
+            cont = cmd_process_input(window, line);
+            if (commands) {
+                commands++;
+                if (!(*commands))
+                    commands = NULL;
+            } else {
+                free(line);
+                line = NULL;
+            }
+        } else {
+            cont = TRUE;
         }
 
 #ifdef HAVE_LIBOTR
@@ -171,11 +141,9 @@ prof_run(gchar* log_level, gchar* account_name, gchar* config_file, gchar* log_f
         session_process_events();
         iq_autoping_check();
 
-        editor_process(wins_get_current());
-
-        if (!background_mode) {
-            ui_update();
-        }
+        ui_update();
+        while (g_main_context_iteration(NULL, FALSE))
+            ;
 #ifdef HAVE_GTK
         tray_update();
 #endif
@@ -207,6 +175,13 @@ _connect_default(const char* const account)
     }
 }
 
+static void
+sigterm_handler(int sig)
+{
+    log_info("Received signal %d, exiting", sig);
+    force_quit = TRUE;
+}
+
 static void
 _init(char* log_level, char* config_file, char* log_file, char* theme_name)
 {
@@ -216,6 +191,8 @@ _init(char* log_level, char* config_file, char* log_file, char* theme_name)
     signal(SIGINT, SIG_IGN);
     signal(SIGTSTP, SIG_IGN);
     signal(SIGWINCH, ui_sigwinch_handler);
+    signal(SIGTERM, sigterm_handler);
+    signal(SIGHUP, sigterm_handler);
     if (pthread_mutex_init(&lock, NULL) != 0) {
         log_error("Mutex init failed");
         exit(1);
@@ -264,6 +241,7 @@ _init(char* log_level, char* config_file, char* log_file, char* theme_name)
 #ifdef HAVE_OMEMO
     omemo_init();
 #endif
+    spellcheck_init();
     atexit(_shutdown);
     plugins_init();
 #ifdef HAVE_GTK
@@ -296,7 +274,7 @@ prof_add_shutdown_routine(void (*routine)(void))
     if (g_list_find_custom(shutdown_routines, &this, (GCompareFunc)_cmp_shutdown_routine)) {
         return;
     }
-    struct shutdown_routine* r = malloc(sizeof *r);
+    struct shutdown_routine* r = g_new(struct shutdown_routine, 1);
     r->routine = routine;
     shutdown_routines = g_list_prepend(shutdown_routines, r);
 }