Bundled default images live here. Filename conventions used by the
helper resolve_image() fallback:
    default-logo.png     - desktop & mobile logo fallback
    default-action.png   - bottom-nav centre action button fallback
    default-map.png      - delivery map graphic fallback

Drop your default brand assets in this folder using the names above
and the plugin will use them when no admin upload is set.

Nav-menu icons (includes/class-dss-hl1-menu-icons.php):
    sale-icon-fire.svg   - scalable two-tone flame (source of truth). This is
                           the artwork embedded in the PHP as a data URI and is
                           what renders by default. viewBox 0 0 100 126.
    sale-icon-fire.png   - 200x252 RGBA raster of the same flame, for anyone
                           who would rather serve a cacheable PNG instead of the
                           embedded SVG (point the `dss_hl1_menu_icons` filter's
                           `file` or `url` key at it).

Both are attached to any menu item carrying the `sale-icon-fire` CSS class and
rendered at 1.45em tall (~20px at a 14px menu font).

Replace an icon by dropping in a file of the same name (and updating the
embedded data URI in default_icon_data() if you want the change to travel with
the PHP), or register your own via the `dss_hl1_menu_icons` filter.
