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 a run-enumeration path and base scoring to the pure-sx model, scoring
one resolution round's clears purely by maximal-run length.
- find_runs(board) enumerates each maximal H/V run (len >= 3) with its
length, parallel to find_matches/MatchMask (left untouched so every
clear/cascade caller is unaffected).
- run_score(len): length 3 -> 30, 4 -> 60, 5+ -> 100 (named constants).
- score_round(board): sum of run_score over the current runs (read-only,
must be called before the round's clear). L/T rule: each maximal run
scores independently by its own length, so an overlapping L/T scores
horizontal + vertical (shared corner counts toward both runs).
- Board gains a running `score` field (init zeroes it) and add_round_score
accumulates a round's base points into it; the cross-round combo
multiplier off Cascade.depth is left for P3.2.
- tests/score.sx golden over hand-crafted single-round boards asserts exact
points for len-3/4/5 runs, disjoint runs (sum), an overlapping L/T, and a
no-match board (0).
