Lock dead players at death site; teleport to spawn when cooldown ends

Persist a death-position snapshot in player attachment data, move spectators
back each tick if they drift, and on rejoin during an active wait. When the
respawn timer completes (or skip command), teleport to bed or world spawn
then restore survival. Uses ServerPlayer.teleportTo with empty RelativeMovement set.

Made-with: Cursor

src/main/java/net/respawnbackoff/RespawnBackoffData.java

@@ -25,4 +25,9 @@ public record RespawnBackoffData(
 	public boolean hasActiveCooldown(long nowMs) {
 		return cooldownEndEpochMs > nowMs;
 	}
+
+	/** True once wall-clock time has reached the scheduled end (timer at zero or past). */
+	public boolean isCooldownFinished(long nowMs) {
+		return cooldownEndEpochMs > 0L && nowMs >= cooldownEndEpochMs;
+	}
 }

src/main/java/net/respawnbackoff/RespawnBackoffMod.java

@@ -55,6 +55,10 @@ public class RespawnBackoffMod implements ModInitializer {
 			ServerPlayer player = handler.player;
 			long now = System.currentTimeMillis();
 			RespawnBackoffData data = player.getAttachedOrElse(RESPAWN_BACKOFF, RespawnBackoffData.DEFAULT);
+			if (data.isCooldownFinished(now)) {
+				clearCooldownAndRestore(player, data);
+				return;
+			}
 			if (data.hasActiveCooldown(now)) {
 				if (!player.isSpectator()) {
 					player.setGameMode(GameType.SPECTATOR);
@@ -126,19 +130,13 @@ public class RespawnBackoffMod implements ModInitializer {
 
 	private static void tickPlayer(ServerPlayer player, long nowMs) {
 		RespawnBackoffData data = player.getAttachedOrElse(RESPAWN_BACKOFF, RespawnBackoffData.DEFAULT);
+		if (data.isCooldownFinished(nowMs)) {
+			clearCooldownAndRestore(player, data);
+			return;
+		}
 		if (data.hasActiveCooldown(nowMs)) {
 			data.deathLock().ifPresent(lock -> enforceDeathLock(player, lock));
 		}
-
-		if (!data.hasActiveCooldown(nowMs)) {
-			return;
-		}
-
-		if (nowMs < data.cooldownEndEpochMs()) {
-			return;
-		}
-
-		clearCooldownAndRestore(player, data);
 	}
 
 	/**
@@ -159,6 +157,7 @@ public class RespawnBackoffMod implements ModInitializer {
 			Optional.empty()
 		);
 		player.setAttached(RESPAWN_BACKOFF, cleared);
+		player.setCamera(player);
 		teleportToRespawnPoint(player);
 		if (player.isSpectator()) {
 			player.setGameMode(GameType.SURVIVAL);