Mechanical sweep of all .sx sources, plan docs, and tests/expected
snapshots for the sx language rename (s8/s16/s32/s64 -> i8/i16/i32/i64).
Verified: tools/run_tests.sh 23/23.
Note: the ios-sim build has 2 pre-existing 'restart' dot-call errors
from the sx opt-in UFCS change (sx a47ea14) — independent of this
rename (present pre-sweep); migrated in the follow-up commit.
Drop the ':' before captures (for xs (x) / for 0..n (i)); the index
capture becomes the trailing open range (for xs, 0.. (x, i)). 136
headers across 26 files, mechanical.
Five headless tests (banner_layout, hit_test, swipe_commit,
swipe_intent, swipe_reshuffle) also gain a direct
#import "modules/ui/types.sx" — they named Point/Frame through a
transitive import, which bare visibility no longer permits.
Gates: sx build --target ios-sim main.sx links; tools/run_tests.sh
23/23.
Add refill to the board model: every .empty hole is filled with a fresh gem
drawn from the board's OWN seeded RNG, so refills are fully reproducible for a
seed and continue the stream rather than reseeding.
- Board now owns its RNG state (rng: Rng); init seeds and draws from it, so
draws after init/clears thread deterministically. The init draw sequence is
unchanged, so board_init's golden is byte-identical.
- refill(board) fills all holes in row-major order wherever they sit (does not
assume collapse ran) and makes no attempt to avoid matches — a refill may
create new runs, which drives the P2.4 cascade.
- tests/refill.sx (fixed seed) runs clear -> collapse -> refill, locks the
staged dump as a golden, and asserts: zero empties after refill; each hole
holds the next seeded-stream gem (replayed from the pre-refill state); drawn
gems vary (not a constant); same start+seed -> identical board; a second
refill of the same holes draws new gems (RNG threads, no reseed).
