Per-sport rank guard + edge diagnostic-only display + delta report

DELTA MEASURED on live prod grades (live ordering unchanged): MLB 7/8
props move (87.5%), mean 2.5 places, TOP READ CHANGES (corey seager hits
1.5 under -> jake burger hits 0.5 over). WNBA 25/25 move, mean 4.1, max 12.
This is a large re-ordering, not a tweak.

Caveat recorded rather than buried: MLB had only 8 graded props at
measurement time. The percentages are real; the sample is one small slate.
Re-run before the flip -- it is one call.

PER-SPORT DOCTRINE ENFORCED IN CODE. WNBA moves the most and must NOT
adopt this: its p_win is anti-predictive, so ranking that board by p_win
would sort it by a signal measured to point the WRONG WAY -- worse than
the incumbent, not better. A comment would not have stopped a future flip
from going global, so FORECAST_RANKED_SPORTS = Set(['mlb']) gates the
forecast_rank stamp, with tests asserting no sport inherits MLB's result.
A sport joins only by passing its own holdout.

EDGE IS NOW DIAGNOSTIC-ONLY IN DISPLAY. MobileEdgeBoard.EdgeCell rendered
green (--g-a) for positive edge and red (--miss) for negative. Two things
were wrong: green/red IS a quality claim on a quantity that does not
predict, and ROW-GRAMMAR reserves red for settled-negative ONLY -- a
negative diagnostic is not a settled loss. Now neutral mono with a
diagnostic tooltip; header reads "MKT GAP · DIAGNOSTIC". The number is
still shown -- no display went blank. DeskShowcase neutralised likewise.

PINNACLE LOGGED, NOT ENSHRINED. Per the order, "market-not-sharp" is
PENDING-RECOVERY rather than a confirmed permanent limitation. The single
question for PropLine is in BLOCKERS.md with its evidence, and MASTER-PLAN
now carries the pending status instead of the permanent claim.

Live sorts remain byte-identical: selectTopGrades, flattenToEdgeBoard and
topGradedService all still call the incumbent.

Gates: 4,041 tests / 323 suites green; next build exit 0.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QJs13VsyiSKYQP6rj3NNmc

web/src/app/pricing/DeskShowcase.tsx

@@ -31,7 +31,9 @@ const statLabel = (s?: string | null) => (s ? (STAT_LABEL[s] || s.replace(/_/g,
 
 function RungCell({ line, grade, edge, base }: Rung) {
   const gradeCol = grade.startsWith('A') ? 'var(--g-a)' : grade.startsWith('B') ? 'var(--text-0)' : grade.startsWith('C') ? 'var(--text-1)' : 'var(--miss)';
-  const edgeCol = edge == null ? 'var(--text-2)' : edge >= 0 ? 'var(--g-a)' : 'var(--miss)';
+  // Edge is a DIAGNOSTIC, not a quality signal — it does not predict outcomes
+  // (n=200 settled MLB: corr -0.010 / -0.022). Neutral mono, no green/red claim.
+  const edgeCol = 'var(--text-1)';
   return (
     <div style={{ flex: '1 1 0', minWidth: 58, textAlign: 'center', padding: '9px 6px', background: 'var(--bg-2)', border: `1px solid ${base ? 'var(--border-hi)' : 'var(--border)'}`, borderRadius: 6 }}>
       <div className="mono" style={{ fontSize: 11, color: base ? 'var(--text-0)' : 'var(--text-1)', marginBottom: 5 }}>{line}{base ? ' •' : ''}</div>