Initial pass at unicorn pack.

internal/game/view.go

@@ -22,7 +22,13 @@ type PlayerView struct {
 	BuysThisRound int  `json:"buysThisRound,omitempty"`
 	// Trumpets is the count banked for the next battle (Bird of Paradise).
 	// Self-only — shown under the player's own deck.
-	Trumpets int    `json:"trumpets,omitempty"`
+	Trumpets int `json:"trumpets,omitempty"`
+	// Mana is the player's persistent Mana pool (Unicorn pack). Public: it's a
+	// play-area counter derivable from public shop/battle events.
+	Mana int `json:"mana,omitempty"`
+	// ShopPeek is the card Bigfoot revealed off the top of the shop deck this
+	// round (Unicorn pack). Self-only — it's private information.
+	ShopPeek *Card  `json:"shopPeek,omitempty"`
 	Deck     []Card `json:"deck,omitempty"` // self only
 }
 
@@ -56,7 +62,10 @@ type View struct {
 	// see a reveal is in progress; the eligible options are only sent to the
 	// buyer (they name the buyer's own hidden pets).
 	PendingReveal *PendingReveal `json:"pendingReveal,omitempty"`
-	Battle     *BattleResult `json:"battle,omitempty"`
+	// PendingSacrifice (Unicorn pack: Water of Youth) mirrors PendingReveal: the
+	// options (the buyer's own pets) are only sent to the buyer.
+	PendingSacrifice *PendingSacrifice `json:"pendingSacrifice,omitempty"`
+	Battle           *BattleResult     `json:"battle,omitempty"`
 	WinnerSeat int           `json:"winnerSeat"`
 	// Log is the shared, public event log shown across every phase.
 	Log []LogEntry `json:"log,omitempty"`
@@ -102,6 +111,7 @@ func (g *Game) ViewFor(playerID string) View {
 			DeckSize:  len(p.Deck),
 			PetCount:  p.PetCount(),
 			Avocados:  p.Avocados,
+			Mana:      p.Mana,
 		}
 		if p.ID == playerID {
 			v.YouSeat = p.Seat
@@ -109,6 +119,7 @@ func (g *Game) ViewFor(playerID string) View {
 			pv.FirstBuyFree = p.FirstBuyFree
 			pv.BuysThisRound = p.BuysThisRound
 			pv.Trumpets = p.PendingTrumpets
+			pv.ShopPeek = p.ShopPeek
 		}
 		v.Players = append(v.Players, pv)
 	}
@@ -126,6 +137,13 @@ func (g *Game) ViewFor(playerID string) View {
 		}
 		v.PendingReveal = &reveal
 	}
+	if g.PendingSacrifice != nil {
+		sac := *g.PendingSacrifice
+		if sac.PlayerID != playerID {
+			sac.Options = nil // hide which of the buyer's pets are eligible
+		}
+		v.PendingSacrifice = &sac
+	}
 	// Battle results (lineups, events) are public once resolved. Keep the
 	// battle around during the following shop phase too, so late joiners /
 	// reconnects can still see the last result.