Add configuration option for ghost reset distance. Improve documentation.

config.cpp

@@ -6,6 +6,7 @@
 std::map<std::string, std::string> Config::values;
 
 bool Config::loadFromFile(const std::string& filename) {
+    // Extremely small JSON subset reader: expects `"key": value` pairs per line.
     std::ifstream file(filename);
     if (!file.is_open()) {
         std::cout << "Warning: Could not open config file: " << filename << std::endl;
@@ -26,6 +27,7 @@ bool Config::loadFromFile(const std::string& filename) {
 }
 
 float Config::getFloat(const std::string& key, float defaultValue) {
+    // Values are stored as strings; convert on demand and fall back if invalid.
     auto it = values.find(key);
     if (it != values.end()) {
         try {
@@ -38,6 +40,7 @@ float Config::getFloat(const std::string& key, float defaultValue) {
 }
 
 int Config::getInt(const std::string& key, int defaultValue) {
+    // Values are stored as strings; convert on demand and fall back if invalid.
     auto it = values.find(key);
     if (it != values.end()) {
         try {
@@ -50,6 +53,7 @@ int Config::getInt(const std::string& key, int defaultValue) {
 }
 
 std::string Config::getString(const std::string& key, const std::string& defaultValue) {
+    // Direct passthrough for callers that want raw string values.
     auto it = values.find(key);
     if (it != values.end()) {
         return it->second;
@@ -58,6 +62,7 @@ std::string Config::getString(const std::string& key, const std::string& default
 }
 
 std::string Config::trim(const std::string& str) {
+    // Helper for stripping whitespace around keys/values.
     size_t start = str.find_first_not_of(" \t\r\n");
     if (start == std::string::npos) return "";
     size_t end = str.find_last_not_of(" \t\r\n");
@@ -100,4 +105,4 @@ bool Config::parseJsonValue(const std::string& line, std::string& key, std::stri
     }
     
     return !key.empty();
-}
+}