feat: 完成 Paper 26.1 适配并整理配置结构

src/main/java/cn/infstar/essentialsC/commands/NightVisionCommand.java

@@ -0,0 +1,61 @@
+package cn.infstar.essentialsC.commands;
+
+import org.bukkit.NamespacedKey;
+import org.bukkit.Sound;
+import org.bukkit.entity.Player;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.potion.PotionEffectType;
+import org.bukkit.persistence.PersistentDataType;
+
+public class NightVisionCommand extends BaseCommand {
+
+    private final NamespacedKey enabledKey;
+
+    public NightVisionCommand() {
+        super("essentialsc.command.nightvision");
+        this.enabledKey = new NamespacedKey(plugin, "nightvision_enabled");
+    }
+
+    @Override
+    protected boolean execute(Player player, String[] args) {
+        boolean currentState = isPluginNightVisionEnabled(player);
+        Boolean targetState = resolveTargetState(currentState, args);
+        if (targetState == null) {
+            player.sendMessage(getLang().getPrefixedString("messages.nightvision-usage"));
+            return true;
+        }
+
+        if (targetState) {
+            player.addPotionEffect(new PotionEffect(PotionEffectType.NIGHT_VISION, Integer.MAX_VALUE, 0, false, false, false));
+            player.getPersistentDataContainer().set(enabledKey, PersistentDataType.BYTE, (byte) 1);
+            playShortcutSound(player, Sound.BLOCK_BEACON_POWER_SELECT);
+            player.sendMessage(getLang().getPrefixedString("messages.nightvision-enabled"));
+        } else {
+            if (currentState) {
+                player.removePotionEffect(PotionEffectType.NIGHT_VISION);
+                player.getPersistentDataContainer().remove(enabledKey);
+            }
+            playShortcutSound(player, Sound.BLOCK_BEACON_DEACTIVATE);
+            player.sendMessage(getLang().getPrefixedString("messages.nightvision-disabled"));
+        }
+        return true;
+    }
+
+    private Boolean resolveTargetState(boolean currentState, String[] args) {
+        if (args.length == 0) {
+            return !currentState;
+        }
+
+        return switch (args[0].toLowerCase()) {
+            case "on", "true", "enable", "enabled" -> true;
+            case "off", "false", "disable", "disabled" -> false;
+            case "toggle" -> !currentState;
+            default -> null;
+        };
+    }
+
+    private boolean isPluginNightVisionEnabled(Player player) {
+        Byte value = player.getPersistentDataContainer().get(enabledKey, PersistentDataType.BYTE);
+        return value != null && value == (byte) 1;
+    }
+}