feat(housekeeping): ban-user with arbitrary duration + ack composer

Adds two new packets:

* Incoming 9102 HousekeepingBanUserEvent — reads (userId, reason,
  hours). Unlike ModToolSanctionBanEvent which only accepts the four
  fixed Habbo-protocol banType buckets (18h / 7d / 30d / 100y), this
  one converts the hours arg straight to seconds and feeds them into
  ModToolManager.ban with ModToolBanType.ACCOUNT and cfhTopic=0.
  Duration is clamped to 100 years to keep it inside `int` range.

* Outgoing 9201 HousekeepingActionResultComposer — generic ack
  for any HK action (ban / mute / kick / give-credits / room-close /
  …). Wire shape is (actionKey, ok, actionId, message). The
  actionKey lets the client filter multiple in-flight actions to
  the right Promise via `accept`, so concurrent admin operations
  don't cross-resolve.

actionId here is the target user id because ModToolBan doesn't
expose the `bans` autoinc id on the object — there's a TODO to swap
this for a dedicated housekeeping_log row id once that table goes in.

Same ACC_HOUSEKEEPING permission gate as the find-user packets, so
operators only need to grant the permission once.

`mvn compile` clean.

Emulator/src/main/java/com/eu/habbo/messages/PacketManager.java

@@ -720,5 +720,6 @@ public class PacketManager {
         // Housekeeping (in-client admin panel)
         this.registerHandler(Incoming.HousekeepingFindUserByNameEvent, com.eu.habbo.messages.incoming.housekeeping.HousekeepingFindUserByNameEvent.class);
         this.registerHandler(Incoming.HousekeepingFindUserByIdEvent, com.eu.habbo.messages.incoming.housekeeping.HousekeepingFindUserByIdEvent.class);
+        this.registerHandler(Incoming.HousekeepingBanUserEvent, com.eu.habbo.messages.incoming.housekeeping.HousekeepingBanUserEvent.class);
     }
 }

Emulator/src/main/java/com/eu/habbo/messages/incoming/Incoming.java

@@ -464,4 +464,5 @@ public class Incoming {
     // Housekeeping (in-client admin panel) — IDs 9100..9199 reserved
     public static final int HousekeepingFindUserByNameEvent = 9100;
     public static final int HousekeepingFindUserByIdEvent = 9101;
+    public static final int HousekeepingBanUserEvent = 9102;
 }

Emulator/src/main/java/com/eu/habbo/messages/incoming/housekeeping/HousekeepingBanUserEvent.java

@@ -0,0 +1,61 @@
+package com.eu.habbo.messages.incoming.housekeeping;
+
+import com.eu.habbo.Emulator;
+import com.eu.habbo.habbohotel.modtool.ModToolBan;
+import com.eu.habbo.habbohotel.modtool.ModToolBanType;
+import com.eu.habbo.habbohotel.permissions.Permission;
+import com.eu.habbo.messages.incoming.MessageHandler;
+import com.eu.habbo.messages.outgoing.housekeeping.HousekeepingActionResultComposer;
+
+import java.util.List;
+
+/**
+ * Apply an arbitrary-duration account ban. Duration is taken in hours
+ * from the wire and converted to seconds for ModToolManager.ban —
+ * unlike ModToolSanctionBanEvent which only accepts the four fixed
+ * Habbo-protocol banType buckets.
+ */
+public class HousekeepingBanUserEvent extends MessageHandler {
+    private static final String ACTION_KEY = "user.ban";
+    private static final int SECONDS_IN_HOUR = 3600;
+    // 100-year ceiling, matches ModToolSanctionBanEvent's permanent ban.
+    private static final int MAX_DURATION_SECONDS = 100 * 365 * 24 * 3600;
+
+    @Override
+    public int getRatelimit() {
+        return 1000;
+    }
+
+    @Override
+    public void handle() throws Exception {
+        if (!this.client.getHabbo().hasPermission(Permission.ACC_HOUSEKEEPING)) {
+            return;
+        }
+
+        int userId = this.packet.readInt();
+        String reason = this.packet.readString();
+        int hours = this.packet.readInt();
+
+        if (userId <= 0 || hours <= 0) {
+            this.client.sendResponse(new HousekeepingActionResultComposer(ACTION_KEY, false, 0, "invalid_input"));
+            return;
+        }
+
+        long durationLong = (long) hours * SECONDS_IN_HOUR;
+        int duration = durationLong > MAX_DURATION_SECONDS ? MAX_DURATION_SECONDS : (int) durationLong;
+
+        List<ModToolBan> bans = Emulator.getGameEnvironment().getModToolManager()
+                .ban(userId, this.client.getHabbo(), reason != null ? reason : "", duration, ModToolBanType.ACCOUNT, 0);
+
+        if (bans == null || bans.isEmpty()) {
+            this.client.sendResponse(new HousekeepingActionResultComposer(ACTION_KEY, false, 0, "ban_failed"));
+            return;
+        }
+
+        // ModToolBan doesn't expose the `bans` table autoinc id on the
+        // object, so we return the target user id as the actionId — it's
+        // the only stable handle the client can use until a dedicated
+        // housekeeping_log row id supersedes it.
+        this.client.sendResponse(new HousekeepingActionResultComposer(ACTION_KEY, true, userId, ""));
+    }
+}

Emulator/src/main/java/com/eu/habbo/messages/outgoing/Outgoing.java

@@ -588,5 +588,6 @@ public class Outgoing {
 
     // Housekeeping (in-client admin panel) — IDs 9200..9299 reserved
     public static final int HousekeepingUserDetailComposer = 9200;
+    public static final int HousekeepingActionResultComposer = 9201;
 
 }

Emulator/src/main/java/com/eu/habbo/messages/outgoing/housekeeping/HousekeepingActionResultComposer.java

@@ -0,0 +1,36 @@
+package com.eu.habbo.messages.outgoing.housekeeping;
+
+import com.eu.habbo.messages.ServerMessage;
+import com.eu.habbo.messages.outgoing.MessageComposer;
+import com.eu.habbo.messages.outgoing.Outgoing;
+
+/**
+ * Generic ack for any housekeeping action (ban, mute, kick, give-credits,
+ * room-close, …). The client matches it back to the originating call via
+ * the `actionKey` field, which lets multiple in-flight actions share the
+ * same event stream without ordering bugs.
+ */
+public class HousekeepingActionResultComposer extends MessageComposer {
+    private final String actionKey;
+    private final boolean ok;
+    private final int actionId;
+    private final String message;
+
+    public HousekeepingActionResultComposer(String actionKey, boolean ok, int actionId, String message) {
+        this.actionKey = actionKey != null ? actionKey : "";
+        this.ok = ok;
+        this.actionId = actionId;
+        this.message = message != null ? message : "";
+    }
+
+    @Override
+    protected ServerMessage composeInternal() {
+        this.response.init(Outgoing.HousekeepingActionResultComposer);
+        this.response.appendString(this.actionKey);
+        this.response.appendBoolean(this.ok);
+        this.response.appendInt(this.actionId);
+        this.response.appendString(this.message);
+
+        return this.response;
+    }
+}