refactor: fix more sonarcloud warnings (#1508)

* refactor: const correctness

* refactor: use getpwuid_r instead of getpwuid

* chore: simplify dict walking loop logic

* refactor: remove dead store assignment in announcer

* refactor: use std::make_shared

qt/PathButton.h

@@ -24,7 +24,6 @@ public:
         FileMode
     };
 
-public:
     explicit PathButton(QWidget* parent = nullptr);
 
     void setMode(Mode mode);