feat: implement multi-seat support

Core features:
  - Add WSeatManager for seat configuration management
  - Extend WSeat with device rule matching capabilities

Author: Dami-star

src/CMakeLists.txt

@@ -169,10 +169,14 @@ qt_add_qml_module(libtreeland
         output/outputlifecyclemanager.h
         seat/helper.cpp
         seat/helper.h
+        seat/seatsmanager.cpp
+        seat/seatsmanager.h
         session/session.cpp
         session/session.h
         surface/surfacecontainer.cpp
         surface/surfacecontainer.h
+        surface/seatsurfacemanager.cpp
+        surface/seatsurfacemanager.h
         surface/surfacefilterproxymodel.cpp
         surface/surfacefilterproxymodel.h
         surface/surfaceproxy.cpp

src/common/treelandlogging.cpp

@@ -1,4 +1,4 @@
-// Copyright (C) 2025 UnionTech Software Technology Co., Ltd.
+// Copyright (C) 2025-2026 UnionTech Software Technology Co., Ltd.
 // SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #include "common/treelandlogging.h"
@@ -16,6 +16,9 @@ Q_LOGGING_CATEGORY(treelandShell, "treeland.shell")
 Q_LOGGING_CATEGORY(treelandInput, "treeland.input")
 Q_LOGGING_CATEGORY(treelandGestures, "treeland.gestures")
 
+// Seat management
+Q_LOGGING_CATEGORY(treelandSeat, "treeland.seat")
+
 // Output module
 Q_LOGGING_CATEGORY(treelandOutput, "treeland.output")
 

src/common/treelandlogging.h

@@ -1,4 +1,4 @@
-// Copyright (C) 2025 UnionTech Software Technology Co., Ltd.
+// Copyright (C) 2025-2026 UnionTech Software Technology Co., Ltd.
 // SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #ifndef TREELAND_LOGGING_H
@@ -20,6 +20,9 @@ Q_DECLARE_LOGGING_CATEGORY(treelandShell)
 Q_DECLARE_LOGGING_CATEGORY(treelandInput)
 Q_DECLARE_LOGGING_CATEGORY(treelandGestures)
 
+// Seat management
+Q_DECLARE_LOGGING_CATEGORY(treelandSeat)
+
 // Output module
 Q_DECLARE_LOGGING_CATEGORY(treelandOutput)