Add roundStartsAt property to Table class and update state management

src/game/tables.js

@@ -30,6 +30,7 @@ class Table {
     this.turnTimeout = null;
     this.turnEndsAt = null;
     this.turnCounter = 0;
+    this.roundStartsAt = null;
     this.clients = new Set();
   }
 
@@ -60,6 +61,7 @@ class Table {
       maxBet: MAX_BET,
       roundId: this.roundId,
       turnEndsAt: this.turnEndsAt,
+      roundStartsAt: this.roundStartsAt,
       dealerHand,
       currentSeatIndex: this.currentSeatIndex,
       seats: this.seats.map((seat, index) => ({
@@ -271,10 +273,14 @@ class Table {
       return;
     }
 
+    this.roundStartsAt = Date.now() + ROUND_START_DELAY_MS;
+    this.broadcastState();
     this.roundTimeout = setTimeout(() => {
       this.roundTimeout = null;
       const hasBets = this.seats.some((seat) => seat.bet > 0);
       if (!hasBets) {
+        this.roundStartsAt = null;
+        this.broadcastState();
         return;
       }
       void this.startRound();
@@ -287,6 +293,7 @@ class Table {
     }
 
     this.clearTurnTimer();
+    this.roundStartsAt = null;
     this.phase = 'playing';
     this.roundId += 1;
     this.deck = shuffle(createDeck());
@@ -466,6 +473,7 @@ class Table {
 
   resetRound() {
     this.clearTurnTimer();
+    this.roundStartsAt = null;
     for (const seat of this.seats) {
       if (!seat.userId) {
         continue;
@@ -484,7 +492,7 @@ class Table {
   }
 }
 
-const tables = Array.from({ length: 3 }, (_, index) => new Table(index + 1, 7));
+const tables = Array.from({ length: 3 }, (_, index) => new Table(index + 1, 4));
 
 export function listTables() {
   return tables.map((table) => table.snapshot());