fix: ll-package-manager process start abnormal

Remove the DBus connection check for ll-package-manager and always
start a new process. The previous logic attempted to reuse an existing
instance but the connection check was unreliable and introduced
complexity. Simplify by always spawning a new process via sudo and
sleeping to ensure readiness.

Log: ll-cli now always starts a new package-manager process instead of
reusing existing one

Influence:
1. Test normal command execution after the change
2. Verify that only one package-manager process runs when invoked
multiple times (if needed)
3. Ensure that existing operations (install, remove, etc.) still work
correctly
4. Check for any race conditions or startup failures due to concurrent
launches
5. Validate that the sleeping interval (1s) is sufficient for the
package-manager to initialize

Author: dengbo11

apps/ll-cli/src/main.cpp

@@ -714,24 +714,15 @@ You can report bugs to the linyaps team under this project: https://github.com/O
             return -1;
         }
 
-        const auto pkgManAddress = QString("unix:path=/tmp/linglong-package-manager.socket");
-
-        // Check if ll-package-manager is already running
-        auto pkgManConn = QDBusConnection::connectToPeer(pkgManAddress, "ll-package-manager");
-        if (!pkgManConn.isConnected()) {
-            // Only start a new process if no existing one is listening
-            startProcess("sudo",
-                         { "--user",
-                           LINGLONG_USERNAME,
-                           "--preserve-env=QT_FORCE_STDERR_LOGGING",
-                           "--preserve-env=QDBUS_DEBUG",
-                           LINGLONG_LIBEXEC_DIR "/ll-package-manager",
-                           "--no-dbus" });
-            using namespace std::chrono_literals;
-            std::this_thread::sleep_for(1s);
-        } else {
-            LogD("ll-package-manager is already running, reuse existing process");
-        }
+        startProcess("sudo",
+                     { "--user",
+                       LINGLONG_USERNAME,
+                       "--preserve-env=QT_FORCE_STDERR_LOGGING",
+                       "--preserve-env=QDBUS_DEBUG",
+                       LINGLONG_LIBEXEC_DIR "/ll-package-manager",
+                       "--no-dbus" });
+        using namespace std::chrono_literals;
+        std::this_thread::sleep_for(1s);
     }
     auto repo = linglong::repo::OSTreeRepo::loadFromPath(LINGLONG_ROOT);
     if (!repo.has_value()) {