Hojun-Cho
47c7dbc2c8
fold-2 chunk C1 (drew's Fam8-13 plan): 960_opaque_decl_run.c and 962_opaque_assign_cast_run.c were value-row C drivers. Migrate their 3+3 cases to test/lang/opaque_decl_test.ww and opaque_assign_cast_test.ww as @test row-tables. The test-lang byte-id (LANGBYTEID) gate gives cs==ww automatically -- 960 was cstage-only-run before, so this strengthens it. Both byte-id clean, no cs!=ww carve. Retire the 2 C drivers (LANGBYTEID floor 57->59) and repoint a dead comment ref in lib/sort/sort.ww. 961_opaque_guards (reject/guards) stays in C -- fold-3 territory, not in the Fam12 fold-2 worklist.