Features:
- Fix string concatenation in attribute values (e.g., class="btn btn-" + type)
- Lexer now properly captures full expressions with operators
- Runtime evaluates expressions for class attributes
ViewEngine improvements:
- Change mixin loading from eager to lazy (on-demand)
- Mixins are now loaded from mixins directory only when first called
- Template-defined mixins take precedence over directory mixins
Benchmarks:
- Add src/benchmark.zig with three template complexity levels
- Simple: ~150k renders/sec, 6KB memory
- Medium: ~70k renders/sec, 45KB memory
- Complex: ~32k renders/sec, 94KB memory
- Memory leak detection confirms no leaks
Documentation:
- Update CLAUDE.md with lazy mixin loading details
- Document mixin resolution order
The lexer would hang when encountering operators like + in attribute values
(e.g., class="btn btn-" + type). Added scanAttrValuePart to handle
expression continuation with operators (+, -, *, /).
Also cleaned up debug prints from view_engine.zig and demo/main.zig.
