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/lib/types.ts

@@ -117,6 +117,49 @@ export interface ModelSnapshot {
   history: OddsHistoryPoint[];
 }
 
+// ---- match previews / team profiles ----
+
+export interface H2HMeeting { date: string; home: string; away: string; homeScore: number; awayScore: number }
+export interface H2HSummary {
+  games: number;
+  /** From THIS fixture's home/away perspective. */
+  homeWins: number;
+  awayWins: number;
+  draws: number;
+  homeGoals: number;
+  awayGoals: number;
+  last: H2HMeeting[];
+}
+
+export interface KeyPlayer { name: string; goals: number; pens: number }
+export interface LineupPlayer { name: string; position: string | null; starter: boolean; number: number | null }
+
+export interface MatchPreview {
+  num: number;
+  fixture: Fixture;
+  venue: string | null;
+  prediction: MatchPrediction | null;
+  /** Recent results per side, most recent first ('W'|'D'|'L'). */
+  form: { home: string[]; away: string[] };
+  h2h: H2HSummary | null;
+  lineups: { home: LineupPlayer[]; away: LineupPlayer[] } | null;
+  keyPlayers: { home: KeyPlayer[]; away: KeyPlayer[] };
+  /** Honest note on which data layers are populated yet. */
+  dataNote: string;
+  updatedAt: number | null;
+}
+
+export interface TeamProfile {
+  team: string;
+  elo: number;
+  group: string | null;
+  standing: StandingRow | null;
+  fixtures: Fixture[];
+  keyPlayers: KeyPlayer[];
+  championOdds: number | null;
+  qualifyOdds: number | null;
+}
+
 // ---- data-story viz (StatsBomb open data, a fixed historical match) ----
 
 export interface VizShot {