Wrapped shortcut-folder setup with existence checks and explicit GError handling so invalid config paths don’t propagate into GTK chooser failures/crashes on Windows.
Removed an unused get_xdir_fs extern declaration from this function while introducing a single xdir value reused across chooser setup logic.
Added type guards before using the stored plugin view/model (GTK_IS_TREE_VIEW, GTK_IS_LIST_STORE) so stale or unexpected object data doesn’t get dereferenced.
Switched plugin list population to always pass non-null strings for name/version/description via plugingui_safe_string, preventing null string propagation into GTK model setters.
Added an unload guard for empty/null modname before calling unload logic, preventing unsafe calls into plugin teardown paths with invalid identifiers.
fe_pluginlist_update() now guards against pl == NULL, pl->version == NULL, and pl->filename == NULL before dereferencing, and uses safe empty-string fallbacks for filename-backed columns. This prevents null dereferences from malformed or partially-populated plugin entries.
plugingui_unload() now early-returns when the selected plugin filepath is NULL/empty before suffix checks and command formatting, preventing invalid string operations in unload flow.
Updated plugin Unload and Reload callbacks to use the guarded session helper before issuing command-based unload/reload for script plugins, and to exit cleanly when no session is available.
Fixed plugin list layout sizing by forcing the tree view’s scrolled container to expand/fill inside the plugin window’s vbox, so the loaded-plugins list now uses full available height above the button row.
Added a defensive check that reports a user-facing error ("No active session available for loading addons.") and exits early when no valid session exists, instead of calling handle_command() with invalid state.
Updated the file request call to pass NULL userdata for load operations, so the callback no longer retains a stale session pointer while the chooser is open.
Fixed the single-file open path in gtkutil_file_req_done() to fetch the filename once and only call gtkutil_check_file() when a non-NULL filename is returned, preventing the crash path when GTK returns no file on accept/load.
Fixed the top-level preferences window layout so the central horizontal content area expands within the main vertical container, instead of staying at natural height.
Updated the Windows build to prefer glib-genmarshal executables with a Python fallback for marshal generation.
Made GTK link dependencies more robust by selecting available ATK library names before assembling GTK libs.
Added compile-time selection to use AppIndicator when available and fall back to GtkStatusIcon otherwise, keeping the status-icon backend available for non-AppIndicator builds (including GTK3 fallback).
Updated multiple GTK UI layout paths (setup, server list, notify, ban list, join dialog, and menu) to use the new helpers for GTK3-safe box/grid creation and attachment behavior.
Added GTK3-safe attach option definitions and updated helper signatures to avoid GTK2-only types/macros in public headers.
Updated gtkutil grid-attachment helpers to use the new attach option type in alignment/expansion logic.
Switched banlist grid attachments to the new helper option flags for GTK3 builds.
Added a fallback in the GTK frontend header to derive HAVE_GTK3 from GTK_MAJOR_VERSION when the macro is missing, so Windows GTK3 builds don’t compile GTK2-only code paths by mistake.
Confirmed inbound_cap_ls only returns early when sts_upgrade_triggered is set by sts_handle_capability, which now only happens for real upgrade/reconnect initiation or in‑progress upgrades.
Added a GTK3-only helper to translate Pango font fields into font-family, font-size, font-style, font-weight, font-variant, and font-stretch CSS declarations while preserving GTK2 behavior under #if !HAVE_GTK3.
Reused the GTK3 font CSS helper in the main UI font styling path to eliminate remaining Pango font: shorthand usage that triggers GTK3 theme parsing warnings.
Exposed the GTK3 font CSS helper in gtkutil so callers can emit CSS-compliant font properties consistently.
Updated gtk_entry_find_position to use GTK3-safe layout offsets and cursor position APIs while preserving GTK2-only field access behind #if !HAVE_GTK3.
Replaced the GTK3 G_DECLARE_DERIVABLE_TYPE usage with explicit GtkXText typedefs/macros to keep the instance struct visible in GTK3 builds and avoid missing member errors.
