M1b screen 01: the flat EDGE BOARD — Design's mobile board IA

The one genuinely-new mobile screen. Design's mobile BOARD is a FLAT edge-ranked
list (all graded props across every game on one list, sorted by edge) — not the
desktop's game-grouped cards. Implemented to the drawing with REAL snapshot data:
- slateAdapter.flattenToEdgeBoard(cards) — pure transform of the assembled
  GameCardData[] (grade→game join already done) into ranked rows, edge desc.
  STRICT null edge sorts LAST (never 0-coerced to the top — Data Semantics Rule).
  Threaded edge_pct through buildPlayerStripsFromProps (was dropped). 6 unit tests.
- MobileEdgeBoard component — Design's exact screen-01 rows: rank (green #1),
  player + prop, matchup sub-line with TeamChips + live-dot, tier grade chip,
  and the edge% as the one bold mono hero (green +, red −). Ranked opacity ramp
  (1 → .55) + green inset border on the top reads. Breadth strip EDGES/AVG CLV/
  GAMES — CLV honest '—' (per-slate CLV isn't computed; never fabricated).
- Slate: <768px renders the flat board, ≥768px keeps game cards (same data,
  toggled by width). Ungraded slate still shows game cards on phones (no blank).

Built to Design's screen-01 drawing, VISUALLY UNVERIFIED at 390px — the core
mobile screen, top of the master-audit list.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/app/globals.css

@@ -1414,6 +1414,15 @@ html[data-font="readable"] .wm::after { opacity: 0.45 !important; }
    SPECIFIC hero sizes, not one generic clamp: 74px grade tier, 40px live
    tier, 24px /u stats. Those land per-surface in M1b, not as a global class.) */
 
+
+/* Rev 3 — flat EDGE BOARD is the mobile board (Design screen 01); desktop keeps
+   the game-grouped cards. */
+.edge-board-mobile { display: none; }
+@media (max-width: 767px) {
+  .edge-board-mobile { display: block; }
+  .edge-board-desktop { display: none !important; }
+}
+
 /* ============================================================
    Session 60 (night2/E) — §7 reveal choreography.
    Stamp slam + 90ms staggered context panels. Entrance keyframes floor at