feat: load/save state from number hotkeys

src/config_file.c

@@ -75,9 +75,12 @@ void config_file_read(ConfigFile *config, const char *path) {
   file_read(&file, path);
 
   if (file.error) {
+    config->error = true;
     return;
   }
 
+  config->error = false;
+
   line = strtok_r(file.content, "\n", &rest);
 
   while (line != NULL) {