Kept existing PNG entries intact and added SVG entries alongside them so the current icon-loading fallback behavior continues to work while enabling the newer icon files.
Added a Help menu _Update entry with a dedicated zc-menu-update icon constant, so Windows builds can display an appropriate update icon in the Help menu.
Extended icon mapping/fallback logic so emoji/update icons resolve correctly across stock/icon-name paths (zc-menu-emoji, zc-menu-update) including GTK2 stock fallback compatibility.
Added zc-menu-emoji to the input entry fallback icon list so the emoji affordance has a deterministic built-in fallback when theme emoji icons are missing.
Added new update and emoji icon assets in both SVG and PNG for light/dark variants, and registered the PNG resources in the gresource manifest for runtime loading.
Updated the GResource manifest so all menu icons now come from data/icons/menu/{light,dark} PNG files and are embedded with to-pixdata preprocessing, ensuring the app uses one unified internal icon set across platforms.
Generated and added PNG assets for both light and dark menu icon variants under data/icons/menu/ to back the new resource paths used by the GTK menu code.
Fixed menu icon resource detection to fall back from PNG to SVG when probing zc-menu-* entries, so menu item icon lookup no longer fails just because one format is unavailable at runtime.
Updated GTK menu icon loading to use gdk_pixbuf_new_from_resource (instead of ..._at_scale) and added explicit fallback order across variant/light and PNG/SVG resources, which addresses the “red no-entry square” missing-icon behavior you reported.
Kept compatibility with your previous menu resource setup while making loading more resilient on Win32 and other environments where resource/pixbuf behavior differs.
Updated search controls in the main UI to use zc-menu-previous / zc-menu-next and to load through gtkutil_image_new_from_stock(...), so those menu-sized icons are rendered from the same data/icons/menu resources instead of theme-dependent icon names.
Updated URL Grabber and Raw Log “Save As” icon constants to use zc-menu-save-as for consistency with the menu icon set.
Added new menu SVGs (save-as, previous, next) in both light and dark variants, and registered all of them in the GResource manifest so they’re available cross-platform from the bundled resource system.
Updated GTK3 icon rendering paths in affected UI helpers to call gtkutil_image_new_from_stock(...), which is the path that resolves zc-menu-* resources correctly and consistently from data/icons/menu (instead of raw theme lookup).
Added new icons to the shared bundled menu icon set (light/dark) for copy, delete, add, remove, spell-check, and refresh, and registered them in the GResource manifest so they are always available at runtime.
Added the new network-list SVG icon in both light and dark variants under data/icons/menu, so it comes from the same icon set as the rest of the menu icons.
Registered both new icon files in the compiled GResource manifest so they are available through the existing resource-loading path.
