Hojun-Cho
374e97b9e8
Migrate the slice/str-header core of drew's Family 1 from bespoke build+run C twins to test/lang @test, retiring each now-redundant twin in the same commit. Runtime coverage MOVES from $(TESTS) to test-lang (T1 runs+asserts via `ww test`) + test-lang-byteid (T2 keeps cs==ww .s byte-id); coverage is preserved, the $(TESTS) headline drops 6 (440->434). All asserts are primitive int/u8/bool comparisons (no fmt/strconv in the assert path); the slice-store families poison the slot (cap!=len) and read it back so a dropped data word FAILS. 928_str_abi_run.c -> str_abi_test.ww (str 24B ABI: .len/.cap across literal/arg/return/field/tuple/deref/index/tagged) 941_slice_store_cap_run.c -> slice_store_cap_test.ww (slice value store through indexed/field/chained lhs writes full 24B header; cap==8) 942_subslice_cap_run.c -> subslice_cap_test.ww (sub-slice cap = base_cap-lo; array/slice/str/append-no-realloc/hi-default) 943_subslice_ptresz_run.c -> subslice_ptresz_test.ww (sub-slice ptr advances lo*esz bytes; esz 2/4/8, let + call-arg) 944_deref_slice_store_run.c-> deref_slice_store_test.ww(*p=sliceval whole-deref store writes 24B header; cap==8) 949_f6_header_run.c -> f6_header_test.ww (str/slice header partial load/store; .cap/.len after clobber) Bump LANGBYTEID_EXPECTED_MIN 16->22 to ratchet the new corpus floor.