Generated methods can now store and load fields through a zero-page receiver,
pass self to direct JSR calls, and keep byte or word results across argument
cleanup. The backlog gains the parser-to-codegen and pass-3 address assignment
stories the next backend work needs.

🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>

Generated programs now have control-flow emission, text and fault output, a
free-list heap, class descriptors, and object construction/deletion. Each
story lands with an x128 fixture and verifier so the runtime stays proven
before the parser drives code generation.

🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>