fix: auto-restart fcitx5 in ProcessMonitor constructor

- Kill existing fcitx5 processes for current user before starting
- Start fcitx5 in detached mode during constructor

Log: auto-restart fcitx5 in ProcessMonitor constructor
pms: BUG-339241

Author: wyu71

debian/changelog

@@ -1,3 +1,9 @@
+deepin-fcitx5configtool-plugin (6.0.23) unstable; urgency=medium
+
+  * Non-maintainer upload.
+
+ -- wangyu <wangyu@uniontech.com>  Sun, 04 Jan 2026 17:10:33 +0800
+
 deepin-fcitx5configtool-plugin (6.0.22) unstable; urgency=medium
 
   * chore: Update compiler flags for security enhancements

src/fcitx5helper/processmonitor.cpp

@@ -86,7 +86,24 @@ ProcessMonitor::ProcessMonitor(QObject *parent) : QObject(parent)
 {
     // qCDebug(procMon) << "Entering ProcessMonitor constructor";
     connect(&m_timer, &QTimer::timeout, this, &ProcessMonitor::checkFcitx5Process);
-    // qCDebug(procMon) << "Exiting ProcessMonitor constructor";
+
+    QString output, error;
+    exeCommand("pgrep", QStringList() << "-u" << getCurrentUserName() << "-x" << "fcitx5", output, error);
+    if (!output.isEmpty()) {
+        QStringList pids = output.trimmed().split('\n', Qt::SkipEmptyParts);
+        for (const QString &pid : pids) {
+            qCDebug(procMon) << "Killing existing fcitx5 process with PID:" << pid;
+            QString killOutput, killError;
+            exeCommand("kill", QStringList() << pid.trimmed(), killOutput, killError);
+        }
+    }
+    QProcess process;
+    bool started = process.startDetached(PROCESS_NAME, QStringList() << "-d");
+    if (started) {
+        qCDebug(procMon) << "Successfully started fcitx5 process in constructor";
+    } else {
+        qCWarning(procMon) << "Failed to start fcitx5 process in constructor";
+    }
 }
 
 void ProcessMonitor::startMonitoring() {