Parser: stop body loop slurping sibling fn decls

[danieljohnmorris]

When a function ends in a bare call and the next declaration starts, the parser used to swallow the next function's identifier as a call arg. Now the body loop checks for function-declaration headers strictly (Ident followed by > before the next ;/EOF, ruling out record-construction false-positives) and stops the body at that boundary. Cross-engine tests + example.

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 3 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/parser/mod.rs	87.50%	3 Missing ⚠️

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