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/tools/aesgcm_download.c

@@ -5,33 +5,7 @@
  * Copyright (C) 2012 - 2019 James Booth <boothj5@gmail.com>
  * Copyright (C) 2020 William Wennerström <william@wstrm.dev>
  *
- * 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.
- *
+ * SPDX-License-Identifier: GPL-3.0-or-later WITH OpenSSL-exception
  */
 
 #include "config.h"
@@ -69,7 +43,7 @@ aesgcm_file_get(void* userdata)
     // and tag stored in the URL fragment.
     if (omemo_parse_aesgcm_url(aesgcm_dl->url, &https_url, &fragment) != 0) {
         cons_show_error("Download failed: Cannot parse URL '%s'.", aesgcm_dl->url);
-        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,
+        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id, THEME_ERROR, ENTRY_ERROR,
                                    "Download failed: Cannot parse URL '%s'.",
                                    aesgcm_dl->url);
         return NULL;
@@ -80,7 +54,7 @@ aesgcm_file_get(void* userdata)
     auto_gchar gchar* tmpname = NULL;
     auto_gfd gint tmpfd = 0;
     if ((tmpfd = g_file_open_tmp("profanity.XXXXXX", &tmpname, NULL)) == -1) {
-        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,
+        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id, THEME_ERROR, ENTRY_ERROR,
                                    "Downloading '%s' failed: Unable to create "
                                    "temporary ciphertext file for writing "
                                    "(%s).",
@@ -91,7 +65,7 @@ aesgcm_file_get(void* userdata)
     // Open the target file for storing the cleartext.
     auto_FILE FILE* outfh = fopen(aesgcm_dl->filename, "wb");
     if (outfh == NULL) {
-        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,
+        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id, THEME_ERROR, ENTRY_ERROR,
                                    "Downloading '%s' failed: Unable to open "
                                    "output file at '%s' for writing (%s).",
                                    https_url, aesgcm_dl->filename,
@@ -101,14 +75,16 @@ aesgcm_file_get(void* userdata)
 
     // We wrap the HTTPDownload tool and use it for retrieving the ciphertext
     // and storing it in the temporary file previously opened.
-    HTTPDownload* http_dl = calloc(1, sizeof(HTTPDownload));
+    HTTPDownload* http_dl = g_new0(HTTPDownload, 1);
     http_dl->window = aesgcm_dl->window;
     http_dl->worker = aesgcm_dl->worker;
     http_dl->id = strdup(aesgcm_dl->id);
     http_dl->url = strdup(https_url);
+    http_dl->display_url = strdup(aesgcm_dl->url);
     http_dl->filename = strdup(tmpname);
     http_dl->cmd_template = NULL;
     http_dl->silent = FALSE;
+    http_dl->silent_done = TRUE;
     http_dl->return_bytes_received = TRUE;
     aesgcm_dl->http_dl = http_dl;
 
@@ -121,7 +97,7 @@ aesgcm_file_get(void* userdata)
 
     FILE* tmpfh = fopen(tmpname, "rb");
     if (tmpfh == NULL) {
-        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,
+        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id, THEME_ERROR, ENTRY_ERROR,
                                    "Downloading '%s' failed: Unable to open "
                                    "temporary file at '%s' for reading (%s).",
                                    aesgcm_dl->url, tmpname,
@@ -136,13 +112,15 @@ aesgcm_file_get(void* userdata)
     remove(tmpname);
 
     if (crypt_res != GPG_ERR_NO_ERROR) {
-        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,
+        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id, THEME_ERROR, ENTRY_ERROR,
                                    "Downloading '%s' failed: Failed to decrypt "
                                    "file (%s).",
                                    https_url, gcry_strerror(crypt_res));
     } else {
-        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,
-                                   "Decrypted file saved to '%s'", aesgcm_dl->filename);
+        http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id, THEME_ONLINE, ENTRY_COMPLETED,
+                                   "Downloading '%s': done\nSaved to '%s'",
+                                   aesgcm_dl->url, aesgcm_dl->filename);
+        win_mark_received(aesgcm_dl->window, aesgcm_dl->id);
     }
 
     if (aesgcm_dl->cmd_template != NULL) {
@@ -152,7 +130,7 @@ aesgcm_file_get(void* userdata)
 
         // TODO: Log the error.
         if (!call_external(argv)) {
-            http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id,
+            http_print_transfer_update(aesgcm_dl->window, aesgcm_dl->id, THEME_ERROR, ENTRY_ERROR,
                                        "Downloading '%s' failed: Unable to call "
                                        "command '%s' with file at '%s' (%s).",
                                        aesgcm_dl->url,