Changes:
- Component render functions return i32 (root element) instead of void
- Nested components (yield SomeComponent()) now work correctly
- Added main() entry point that calls top-level component and sets root
- Updated runtime to call main() instead of render_ComponentName()
Note: Active state in ternary expressions still needs reactive updates
This commit fixes the nested component rendering issue
All tests passing (51 passed, 2 skipped)
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Co-Authored-By: Claude <noreply@anthropic.com>