Publish the all-in runout street by street

During an all-in runout, dealRemainingBoard() dealt every remaining card
without touching currentStreet, so a pre-flop all-in produced a terminal
snapshot labelled PREFLOP carrying a five-card board.

Setting currentStreet = RIVER would fix the label but leave a second problem:
the board jumped from empty to complete in a single snapshot, so the UI could
not animate the runout — the moment a poker table most needs to. Instead
dealRemainingBoard() is now suspend and publishes each street as it lands,
which keeps currentStreet honest as a consequence rather than as a special
case. Each runout street also sweeps its betting into the pot via
prepareRound(), matching the normal street transition.

Verified by reverting: the board went 0 -> 5 with the terminal snapshot
labelled PREFLOP, and three of the four new tests failed.

Tests: 48 -> 52, green on jvmTest and testAndroidHostTest.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

engine/src/commonMain/kotlin/com/jsjdesigns/poker/game/Table.kt

@@ -305,7 +305,15 @@ class Table(
         board.add(deck.deal())
     }
 
-    private fun dealRemainingBoard(from: Street) {
+    /**
+     * Runs the board out when nobody can act any more.
+     *
+     * Publishes each street as it lands rather than dealing all five cards
+     * silently: an all-in runout is the moment a poker UI most needs to animate,
+     * and it also keeps [currentStreet] honest — otherwise a pre-flop all-in ends
+     * on a snapshot labelled PREFLOP that carries a five-card board.
+     */
+    private suspend fun dealRemainingBoard(from: Street) {
         var s = from
         while (s != Street.RIVER) {
             s = when (s) {
@@ -314,6 +322,10 @@ class Table(
                 Street.TURN -> { dealRiver(); Street.RIVER }
                 Street.RIVER -> Street.RIVER
             }
+            currentStreet = s
+            // Sweep the completed betting into the pot before showing the card.
+            prepareRound(s)
+            emit(TableSnapshot.Phase.STREET_COMPLETE)
         }
     }