A match run is a different kind of run, and stops polluting the gore stats

The two modes share no currency: gore counts kills, multi-kills and weapons;
zombie tennis counts opponents felled and has exactly one kill per opponent,
always credited to 'bomb' (matchGameWon's explode). Every one of those was
landing in splatterRuns as a gore run, on the roster as THE CLUB PRO, and on
the KILLS world board — where a five-body match would post a row next to a
300-kill massacre and mean something else entirely by it.

One character on the record fixes all of it: `m`, absent meaning gore (which
is what every existing record is, so no migration). read() takes a mode and
so does endRun, which now compares you only against your own mode and refuses
a name prompt from a match.

The record's two headline slots carry each MODE's two headline numbers — gore
g=games s=sets, match g=felled s=games — so `g` stays the thing everything
ranks on and the match best is derived from the record instead of living in a
second key that drifts. That retires the matchBest key from the last commit.

Found on the way, pre-existing and visible: endRun returned `{...best, kills,
games}` and the later key won, so G.best.games was the run that had just died.
The gore death screen has been printing "BEST <this run> GAMES · <the record>
SETS". The return now carries the best and nothing else.

And stats.check() — the module's own fixture check — was exported and called
by nothing. Wired into the suite, with the mode split added to it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/render.js

@@ -2104,9 +2104,9 @@ export function render() {
     shadowText(m ? 'BLED OUT.' : 'GAME, SET, MASSACRE.', W / 2, H / 2 - 44, UI.bad);
     ctx.font = F(9);
     shadowText(m ? 'FELLED ' + m.felled + ' OPPONENT' + (m.felled === 1 ? '' : 'S')
-                   + ' · ' + (score.games[0] + score.games[1]) + ' GAMES'
+                   + ' · ' + m.games + ' GAMES'
                  : 'SURVIVED ' + G.runGames + ' GAMES · ' + G.sets[0] + ' SETS', W / 2, H / 2 - 14, UI.cream);
-    if (m ? m.newBest : G.newBest) { // a fresh record crows; otherwise show the mark to beat
+    if (G.newBest) { // a fresh record crows; otherwise show the mark to beat
       const pulse = 0.55 + 0.45 * Math.abs(Math.sin(G.eatenT * 4));
       ctx.font = B(20);
       shadowText('★ NEW BEST ★', W / 2, H / 2 + 2, hexA(UI.warm, pulse));