fix(ui,db): harden NULL handling and resource lifecycle across UI and SQLite

ui/window: fix subwindow lifecycle (safe delwin on recreate), clamp widths, add fallback timestamp
when loading history to avoid NULL deref
ui/buffer: add GSList bounds checks; assert non-NULL timestamps when creating entries
ui/titlebar: guard newwin failures; make draw/resize/free no-ops when window is NULL
ui/statusbar: guard window creation/resize/close; clamp columns; fallback display name if JID
parsing fails
ui/inputwin: check newpad result; guard resize/getters/close on NULL; safe delwin
ui/chatwin: guard buffer_get_entry/time before ISO8601 formatting
ui/window_list: validate win_create_* results; don’t insert NULL windows; fix barejid leak in
wins_get_by_string
db/database: ensure cleanup on sqlite init/open failures; use sqlite3_close_v2 and warn if busy;
always return a ProfMessage from log_database_get_limits_info and set current UTC timestamp when
is_last with no row; initialize err_msg and free consistently; improve error messages
Prevents crashes from NULL dereferences (e.g., during MAM history) and closes small leaks; improves
robustness under OOM and allocation failures.

src/ui/statusbar.c

@@ -111,16 +111,23 @@ status_bar_init(void)
 
     int row = screen_statusbar_row();
     int cols = getmaxx(stdscr);
+    if (cols <= 0) {
+        cols = 1;
+    }
     statusbar_win = newwin(1, cols, row, 0);
 
-    status_bar_draw();
+    if (statusbar_win) {
+        status_bar_draw();
+    }
 }
 
 void
 status_bar_close(void)
 {
-    delwin(statusbar_win);
-    statusbar_win = NULL;
+    if (statusbar_win) {
+        delwin(statusbar_win);
+        statusbar_win = NULL;
+    }
     if (statusbar) {
         if (statusbar->time) {
             g_free(statusbar->time);
@@ -145,7 +152,13 @@ status_bar_close(void)
 void
 status_bar_resize(void)
 {
+    if (!statusbar_win) {
+        return;
+    }
     int cols = getmaxx(stdscr);
+    if (cols <= 0) {
+        cols = 1;
+    }
     werase(statusbar_win);
     int row = screen_statusbar_row();
     wresize(statusbar_win, 1, cols);
@@ -285,6 +298,9 @@ status_bar_clear_fulljid(void)
 void
 status_bar_draw(void)
 {
+    if (!statusbar_win) {
+        return;
+    }
     werase(statusbar_win);
     wbkgd(statusbar_win, theme_attrs(THEME_STATUS_TEXT));
 
@@ -674,8 +690,13 @@ _display_name(StatusBarTab* tab)
         fullname = g_strconcat(mucwin_title, " conf", NULL);
     } else if (tab->window_type == WIN_PRIVATE) {
         auto_jid Jid* jid = jid_create(tab->identifier);
-        auto_gchar gchar* mucwin_title = mucwin_generate_title(jid->barejid, PREF_STATUSBAR_ROOM_TITLE);
-        fullname = g_strconcat(mucwin_title, "/", jid->resourcepart, NULL);
+        if (jid) {
+            auto_gchar gchar* mucwin_title = mucwin_generate_title(jid->barejid, PREF_STATUSBAR_ROOM_TITLE);
+            fullname = g_strconcat(mucwin_title, "/", jid->resourcepart, NULL);
+        } else {
+            // Fallback: use identifier directly if JID parsing failed
+            fullname = strdup(tab->identifier);
+        }
     } else {
         fullname = strdup("window");
     }