fixed two minor oversights

src/backends/darwin.mm

@@ -103,7 +103,7 @@ bool backend::toggleAutostart(bool enabled) {
 
 bool backend::init() {
     hideDockIcon(true);
-    return false;
+    return true;
 }
 
 #undef LAUNCH_AGENT_TEMPLATE

src/backends/linux.cpp

@@ -4,6 +4,8 @@
 #include <filesystem>
 #include <fstream>
 #include <iostream>
+#include <limits.h>
+#include <unistd.h>
 
 #include "../backend.hpp"