Fixes EvalError: Undefined symbol: path when rendering ~mobile-filter
component which uses an SVG <path> element.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
S-expression AST → HTML string renderer with ~100 HTML tags, void elements,
boolean attributes, XSS escaping, raw!, fragments, and components. Render-aware
special forms (if, when, cond, let, map, etc.) handle HTML tags in control flow
branches correctly by calling _render instead of _eval.
63 new tests (172 total across parser, evaluator, renderer).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>