Allow retained logical objects to own multiple marker-backed output fragments without leaking handles or positions into pure plans. Expose only defensive numeric mount snapshots through the public object index.
Verified: 718 ERT tests, 92 doctests, WERROR compile-all, checkdoc, and git diff --check.
Publish client-owned side state after retained surfaces and roll it back in reverse order on any transaction failure.\n\nVerified: 715 ERT tests, 92 doctests, WERROR compile-all, checkdoc, git diff --check.
Expose one-shot string and buffer styling plus reactive range watches over the same schema, mutation, binding, and retained surface core.
Verification: 712 ERT tests; 92 doctests; shuffled seed 20260806; compile-all WERROR=t.
Introduce the pure TP 1.0 property schema, selector, cascade, custom-property, computed-value, provenance, and Emacs projection kernel. Compile static legacy layer definitions into canonical named styles without freezing parameterized or reactive definitions.\n\nVerified with 667 ERT tests, 92 doctests, shuffled seed 20260806, and compile-all with warnings as errors.
