Audit and remove short-term hacks in TS spec build path

[sodic]

When the TS spec was initially implemented (#2276, #2299), some corners were cut - particularly around wasp build (e.g., #2372). These need to be found and properly fixed before the TS spec becomes official.

TODO

1. Audit the codebase for workarounds from the initial TS spec effort (build-specific hacks, hacky DSL/TS-spec conditionals, TODOs referencing temporary solutions).
2. Fix each one in-place or create a follow-up issue.

[sodic]

Could be solved automatically when we do #2390.

Best case if it solves itself, we just need to remove the hack: 3 hours
Worst case: 15h. If it's more than that, we're not doing it.