UI chrome (dropdown carets, undo/redo, checkmarks, close/menu/osnap,
layer/file-menu icons) and ribbon tool icons were drawn as Unicode
glyphs. Desktop fills missing glyphs via system-font fallback, but the
web build bundles only Fira Sans with no fallback, so they rendered as
empty tofu boxes (issue #116).
Add a shared src/ui/icons.rs (SVG-backed, tintable) plus bundled assets,
and switch every glyph site and IconKind::Glyph tool def to SVG.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Each dialog window (Page Setup, DimStyle, TextStyle, TableStyle,
MLineStyle, PlotStyle, Layout Manager, Shortcuts) is now a proper
window-filling layout in its own src/ui/<dialog>.rs file.
Pattern: toolbar strip at top + vertical separator + scrollable
content filling the rest — no modal card, no backdrop, no stack[].
Matches the existing Layer Manager window pattern.
Removed ~1600 lines of old overlay functions from view.rs.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
