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`AssetPath::resolve` concatenates, so manifest-relative SVG paths ended up under `…/theme.ron/<name>.svg` and the asset server reported all 53 references missing. `resolve_embed` is the RFC 1808 sibling-resolution method that strips the base path's last segment first, giving the intended `…/<name>.svg`. Default theme now loads cleanly from the embedded:// source. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>