feat: prefer bundled wl-copy and add BUNDLE_WL_COPY cmake option

On Wayland, look for wl-copy next to the application binary first
(covers self-contained builds like AppImage), then fall back to PATH.
Add BUNDLE_WL_COPY cmake option to install wl-copy alongside the client
binary during packaging.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: jb0421

src/gui/CMakeLists.txt

@@ -230,4 +230,10 @@ if(UNIX AND NOT APPLE)
     if(SharedMimeInfo_FOUND)
         update_xdg_mimetypes( ${KDE_INSTALL_DATADIR}/mime/packages )
     endif(SharedMimeInfo_FOUND)
+
+    option(BUNDLE_WL_COPY "Bundle wl-copy for self-contained builds such as AppImage" OFF)
+    if(BUNDLE_WL_COPY)
+        find_program(WL_COPY_EXECUTABLE wl-copy REQUIRED)
+        install(PROGRAMS ${WL_COPY_EXECUTABLE} DESTINATION ${KDE_INSTALL_BINDIR})
+    endif()
 endif()

src/gui/socketapi/socketapi.cpp

@@ -38,6 +38,7 @@
 #include <QDir>
 #include <QFile>
 #include <QFileDialog>
+#include <QFileInfo>
 #include <QLocalSocket>
 #include <QMessageBox>
 #include <QMetaMethod>
@@ -674,7 +675,11 @@ void SocketApi::command_OPEN_PRIVATE_LINK_VERSIONS(const QString &localFile, Soc
 void SocketApi::copyUrlToClipboard(const QUrl &link)
 {
     if (!qgetenv("WAYLAND_DISPLAY").isEmpty()) {
-        QProcess::startDetached(QStringLiteral("wl-copy"), {link.toString()});
+        QString wlCopy = QApplication::applicationDirPath() + QStringLiteral("/wl-copy");
+        if (!QFileInfo::exists(wlCopy)) {
+            wlCopy = QStringLiteral("wl-copy");
+        }
+        QProcess::startDetached(wlCopy, {link.toString()});
     } else {
         QApplication::clipboard()->setText(link.toString());
     }