Add a persistent event log for shop and prep actions.

internal/game/view.go

@@ -35,6 +35,8 @@ type View struct {
 	Pending    *PendingTrade `json:"pending,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"`
 	// Debug is set by the server when its DEBUG flag is on, unlocking the
 	// client's "buy any card" panel. Not part of the pure game state.
 	Debug bool `json:"debug,omitempty"`
@@ -54,6 +56,7 @@ func (g *Game) ViewFor(playerID string) View {
 		PrioritySeat: g.PrioritySeat,
 		ShopRow:      g.ShopRow,
 		WinnerSeat:   g.WinnerSeat,
+		Log:          g.Log,
 	}
 	for _, deck := range g.ShopDecks {
 		v.DeckCounts = append(v.DeckCounts, len(deck))