v2 Phase 2: match previews + team profiles

- buildPreviewData.ts: precomputes from 150y of results → h2h.json (825 WC-team
  pairings, full records + recent meetings) + scorers.json (top-10 all-time
  scorers per team). Committed goalscorers.csv.
- server/src/preview.ts: assembles MatchPreview / TeamProfile from three layers —
  historical (h2h, scorers), DB enrichment (ESPN form/lineups/venue), live model
  (W/D/L, xG, odds, Elo). /api/preview/:num + /api/team/:name.
- Client: rich /match/:num page (model expectation, recent form chips, H2H record
  + recent meetings, lineups-or-key-players) and /team/:name profile (Elo, odds,
  standing, fixtures, all-time scorers). Match cards now link to previews;
  cross-linking between matches and teams.
- Verified: Mexico-SA preview (81% W, 2-0, form, H2H 2-1-1, Borgetti 37) and
  Argentina profile (Messi 63) render; 22 tests pass; build clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/features/match/MatchPreviewPage.tsx

@@ -0,0 +1,199 @@
+import { useEffect, useState } from 'react';
+import { Link, useParams } from '@tanstack/react-router';
+import { ArrowLeft, Shirt } from 'lucide-react';
+import { Card, CardBody, CardHeader } from '@/components/ui/Card';
+import { WinProbBar } from '@/components/WinProbBar';
+import { FormChips } from '@/components/FormChips';
+import { teamFlag } from '@/lib/teams';
+import { kickoffDay, kickoffTime } from '@/lib/format';
+import type { KeyPlayer, MatchPreview } from '@/lib/types';
+
+const STAGE: Record<string, string> = {
+  group: 'Group', r32: 'Round of 32', r16: 'Round of 16', qf: 'Quarter-final', sf: 'Semi-final', third: 'Third place', final: 'Final',
+};
+
+function ScorerList({ team, players }: { team: string; players: KeyPlayer[] }) {
+  return (
+    <div>
+      <div className="mb-2 flex items-center gap-2 text-sm font-semibold text-ink">
+        <span aria-hidden>{teamFlag(team)}</span> {team}
+      </div>
+      {players.length ? (
+        <ul className="space-y-1">
+          {players.slice(0, 6).map((p) => (
+            <li key={p.name} className="flex items-center justify-between text-sm">
+              <span className="truncate text-ink-soft">{p.name}</span>
+              <span className="tnum shrink-0 text-faint">
+                {p.goals}{p.pens ? <span className="text-faint/70"> ({p.pens}p)</span> : null}
+              </span>
+            </li>
+          ))}
+        </ul>
+      ) : (
+        <p className="text-xs text-faint">no data</p>
+      )}
+    </div>
+  );
+}
+
+export function MatchPreviewPage() {
+  const { num } = useParams({ strict: false }) as { num: string };
+  const [preview, setPreview] = useState<MatchPreview | null>(null);
+  const [failed, setFailed] = useState(false);
+
+  useEffect(() => {
+    let alive = true;
+    setPreview(null);
+    setFailed(false);
+    fetch(`/api/preview/${num}`)
+      .then((r) => (r.ok ? r.json() : Promise.reject()))
+      .then((d: MatchPreview) => alive && setPreview(d))
+      .catch(() => alive && setFailed(true));
+    return () => { alive = false; };
+  }, [num]);
+
+  if (failed) {
+    return (
+      <div className="py-16 text-center text-muted">
+        Couldn&apos;t load that match. <Link to="/" className="text-accent">Back to Live</Link>
+      </div>
+    );
+  }
+  if (!preview) return <div className="h-96 animate-pulse rounded-xl border border-line bg-panel" />;
+
+  const f = preview.fixture;
+  const hasScore = f.status === 'live' || f.status === 'finished';
+  const homeName = f.home.label;
+  const awayName = f.away.label;
+
+  return (
+    <div className="space-y-5">
+      <Link to="/" className="inline-flex items-center gap-1.5 text-sm text-muted hover:text-ink">
+        <ArrowLeft size={15} /> Back
+      </Link>
+
+      {/* hero */}
+      <Card>
+        <CardBody>
+          <div className="mb-3 text-center text-xs uppercase tracking-wide text-faint">
+            {f.group ? `Group ${f.group}` : STAGE[f.stage]} · {kickoffDay(f.kickoff)} · {kickoffTime(f.kickoff)} · {preview.venue}
+          </div>
+          <div className="grid grid-cols-[1fr_auto_1fr] items-center gap-3">
+            <Link to="/team/$name" params={{ name: f.home.team ?? '' }} className="flex flex-col items-center gap-1 hover:opacity-80">
+              <span aria-hidden className="text-4xl">{f.home.team ? teamFlag(f.home.team) : '⚽'}</span>
+              <span className="text-center text-sm font-semibold text-ink">{homeName}</span>
+            </Link>
+            <div className="text-center">
+              {hasScore ? (
+                <div className="tnum text-3xl font-extrabold text-ink">{f.homeScore ?? 0}–{f.awayScore ?? 0}</div>
+              ) : (
+                <div className="tnum text-lg font-bold text-muted">{kickoffTime(f.kickoff)}</div>
+              )}
+              {f.status === 'live' && <div className="text-[11px] font-bold uppercase text-live">{f.minute ? `${f.minute}'` : 'Live'}</div>}
+            </div>
+            <Link to="/team/$name" params={{ name: f.away.team ?? '' }} className="flex flex-col items-center gap-1 hover:opacity-80">
+              <span aria-hidden className="text-4xl">{f.away.team ? teamFlag(f.away.team) : '⚽'}</span>
+              <span className="text-center text-sm font-semibold text-ink">{awayName}</span>
+            </Link>
+          </div>
+        </CardBody>
+      </Card>
+
+      {/* model expectation */}
+      {preview.prediction && (
+        <Card>
+          <CardHeader><span className="font-display font-bold text-ink">Model expectation</span></CardHeader>
+          <CardBody className="space-y-2">
+            <WinProbBar home={preview.prediction.home} away={preview.prediction.away} probs={preview.prediction.probs} topScore={preview.prediction.topScore} />
+            <p className="text-xs text-faint">
+              Expected goals: {preview.prediction.lambdaHome.toFixed(2)} – {preview.prediction.lambdaAway.toFixed(2)} ·
+              model odds, not betting advice
+            </p>
+          </CardBody>
+        </Card>
+      )}
+
+      {/* form */}
+      <Card>
+        <CardHeader><span className="font-display font-bold text-ink">Recent form</span></CardHeader>
+        <CardBody className="space-y-3">
+          <div className="flex items-center justify-between">
+            <span className="flex items-center gap-2 text-sm font-medium text-ink">{f.home.team && teamFlag(f.home.team)} {homeName}</span>
+            <FormChips form={preview.form.home} />
+          </div>
+          <div className="flex items-center justify-between">
+            <span className="flex items-center gap-2 text-sm font-medium text-ink">{f.away.team && teamFlag(f.away.team)} {awayName}</span>
+            <FormChips form={preview.form.away} />
+          </div>
+        </CardBody>
+      </Card>
+
+      {/* head to head */}
+      {preview.h2h && (
+        <Card>
+          <CardHeader><span className="font-display font-bold text-ink">Head to head</span></CardHeader>
+          <CardBody>
+            <div className="mb-3 grid grid-cols-3 items-center text-center">
+              <div><div className="tnum text-2xl font-extrabold text-accent">{preview.h2h.homeWins}</div><div className="text-[11px] text-faint">{homeName} wins</div></div>
+              <div><div className="tnum text-2xl font-extrabold text-muted">{preview.h2h.draws}</div><div className="text-[11px] text-faint">draws · {preview.h2h.games} total</div></div>
+              <div><div className="tnum text-2xl font-extrabold text-info">{preview.h2h.awayWins}</div><div className="text-[11px] text-faint">{awayName} wins</div></div>
+            </div>
+            <div className="border-t border-line pt-2">
+              <div className="mb-1 text-[11px] uppercase tracking-wide text-faint">Recent meetings</div>
+              <ul className="space-y-1 text-sm">
+                {preview.h2h.last.map((m, i) => (
+                  <li key={i} className="flex items-center justify-between text-ink-soft">
+                    <span className="text-faint">{m.date.slice(0, 10)}</span>
+                    <span>{m.home} <span className="tnum font-semibold text-ink">{m.homeScore}–{m.awayScore}</span> {m.away}</span>
+                  </li>
+                ))}
+              </ul>
+            </div>
+          </CardBody>
+        </Card>
+      )}
+
+      {/* lineups or key players */}
+      <Card>
+        <CardHeader className="flex items-center gap-2">
+          <Shirt size={16} className="text-accent" />
+          <span className="font-display font-bold text-ink">{preview.lineups ? 'Lineups' : 'Key players (all-time scorers)'}</span>
+        </CardHeader>
+        <CardBody className="grid grid-cols-2 gap-6">
+          {preview.lineups ? (
+            <>
+              <LineupCol team={homeName} players={preview.lineups.home} />
+              <LineupCol team={awayName} players={preview.lineups.away} />
+            </>
+          ) : (
+            <>
+              <ScorerList team={homeName} players={preview.keyPlayers.home} />
+              <ScorerList team={awayName} players={preview.keyPlayers.away} />
+            </>
+          )}
+        </CardBody>
+      </Card>
+
+      <p className="text-center text-xs text-faint">{preview.dataNote}</p>
+    </div>
+  );
+}
+
+function LineupCol({ team, players }: { team: string; players: { name: string; position: string | null; number: number | null; starter: boolean }[] }) {
+  const starters = players.filter((p) => p.starter);
+  const list = starters.length ? starters : players;
+  return (
+    <div>
+      <div className="mb-2 text-sm font-semibold text-ink">{team}</div>
+      <ul className="space-y-0.5 text-sm">
+        {list.map((p) => (
+          <li key={p.name} className="flex items-center gap-2 text-ink-soft">
+            <span className="tnum w-5 text-right text-xs text-faint">{p.number ?? ''}</span>
+            <span className="truncate">{p.name}</span>
+            <span className="ml-auto text-[11px] text-faint">{p.position}</span>
+          </li>
+        ))}
+      </ul>
+    </div>
+  );
+}