Step 18 (part 2): _hyperscript parser — token stream → SX AST

lib/hyperscript/parser.sx — parses token stream from hs-tokenize into
SX AST forms. Covers:
  Commands: add/remove/toggle class, set/put, log, hide/show, settle
  Events: on with from/filter, command sequences
  Sequencing: then, wait (with time units)
  Conditionals: if/then/else/end
  Expressions: property chains, it, comparisons, exists, refs
  DOM traversal: closest, next, previous
  Send/trigger events to targets
  Repeat: forever, N times
  Fetch/call with argument lists

55 tests across 12 suites. 3005/3005 full build, zero regressions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

hosts/ocaml/bin/run_tests.ml

@@ -1310,6 +1310,7 @@ let run_spec_tests env test_files =
   load_module "parser-combinators.sx" lib_dir;
   let hs_dir = Filename.concat lib_dir "hyperscript" in
   load_module "tokenizer.sx" hs_dir;
+  load_module "parser.sx" hs_dir;
   load_module "types.sx" lib_dir;
   load_module "sx-swap.sx" lib_dir;
   (* Shared templates: TW styling engine *)