The object-snap menu drew each mode's marker as a Unicode geometric glyph
(◻ △ ◯ …). The web build bundles only Fira Sans, which lacks them, so they
rendered as tofu boxes (#138). Add an SVG per snap mode under
assets/icons/osnap, map them via icons::osnap, and draw them with the same
tinted-SVG path the rest of the chrome uses — font-independent on every
platform.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
