Fix game tests failing on dedicated servers with other mods

Creative break tests now set creative mode explicitly, as the server's
default game mode applies otherwise. The sound tests' listening player
uses the mock player name, so Cyclops Core skips sending mod packets to
its connection, which negotiated no channels.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RSz5r6eowhjNuANBjZE2v6

Author: claude

loader-common/src/main/java/org/cyclops/colossalchests2/gametest/GameTestsCommon.java

@@ -1422,6 +1422,8 @@ public void testSurvivalBreakDropsCoreOnPlayerSide(GameTestHelper helper) {
 
     private static ServerPlayer makePlayerNorthOf(GameTestHelper helper, BlockPos corePos) {
         ServerPlayer player = helper.makeMockServerPlayerInLevel();
+        // Block breaking follows the server's default game mode, which is survival outside the game test server.
+        player.gameMode.changeGameModeForPlayer(GameType.CREATIVE);
         BlockPos absolute = helper.absolutePos(corePos);
         player.snapTo(absolute.getX() + 0.5, absolute.getY(), absolute.getZ() - 2.5, 0, 0);
         return player;
@@ -2749,7 +2751,8 @@ public void testUncolossalChestSounds(GameTestHelper helper) {
      * Like {@link GameTestHelper#makeMockServerPlayerInLevel()}, but the packets it receives can be read from the channel.
      */
     private static ListeningPlayer makeListeningPlayer(GameTestHelper helper) {
-        CommonListenerCookie cookie = CommonListenerCookie.createInitial(new GameProfile(UUID.randomUUID(), "test-sound-player"), false);
+        // Cyclops Core sends no mod packets to this name, as this connection did not negotiate any channels.
+        CommonListenerCookie cookie = CommonListenerCookie.createInitial(new GameProfile(UUID.randomUUID(), "test-mock-player"), false);
         ServerPlayer player = new ServerPlayer(helper.getLevel().getServer(), helper.getLevel(), cookie.gameProfile(), cookie.clientInformation());
         Connection connection = new Connection(PacketFlow.SERVERBOUND);
         EmbeddedChannel channel = new EmbeddedChannel(connection);