Forfeit = 2x coin loss + 0 XP (no kot); end-of-game roster + add friend

Forfeit penalty reworked (client + server gamification, in sync):
- Surrendering team loses DOUBLE the entry coins; winner takes the stake.
- Forfeiter earns NO XP. No kot is applied or mentioned anymore.
- MatchSummary/Dto carry a `forfeit` flag; GameRoom.FinalizeForfeit →
  ApplyRewardsAsync(team) with Forfeit=true (dropped the kot path).
- Forfeit confirm dialogs now alert the real penalty (double coins, no XP).

End-of-game roster: SeatPlayerDto/ServerSeatPlayer + game-store SeatPlayer gain
userId/isBot. New <MatchPlayersList> lists everyone at the table on the final
screen (PostMatchRewardsModal + AI MatchOverlay) with a tactile "Add" button to
send a friend request to real (non-bot, non-self) players ("Sent" after).

Verified: tsc + sim + dotnet + next build clean; stack rebuilt :1500/:1505.

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

src/lib/game-store.ts

@@ -40,6 +40,8 @@ export interface SeatPlayer {
   name: string;
   avatar: string; // emoji
   level: number;
+  id?: string; // real player's user id (for add-friend); absent for bots/you
+  isBot?: boolean;
 }
 
 export interface GameSettings {
@@ -343,6 +345,7 @@ export const useGameStore = create<GameStore>((set, get) => {
           name,
           avatar: AI_AVATARS[i],
           level: 0,
+          isBot: i > 0, // seat 0 is you
         })),
       });
       scheduleAuto();
@@ -408,7 +411,7 @@ export const useGameStore = create<GameStore>((set, get) => {
       const next = mapServerState(s);
       const seatPlayers: SeatPlayer[] = [...s.seatPlayers]
         .sort((a, b) => a.seat - b.seat)
-        .map((sp) => ({ name: sp.name, avatar: avatarEmoji(sp.avatar), level: sp.level }));
+        .map((sp) => ({ name: sp.name, avatar: avatarEmoji(sp.avatar), level: sp.level, id: sp.userId, isBot: sp.isBot }));
 
       // accumulate the reward tally when the match score grows (a round ended)
       const prevTotal = prev.matchScore[0] + prev.matchScore[1];