Add config getters for logging, history and behavior settings

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <[email protected]>

lib/settings.py

@@ -72,6 +72,18 @@ class ConfigLoader:
 
         return value.lower() in ('true', 'yes', '1', 'on')
 
+    def get_float(self, section, key, fallback=0.0):
+        """Get a float configuration value"""
+        value = self.get(section, key)
+        if value is None:
+            return fallback
+
+        try:
+            return float(value)
+        except ValueError:
+            logger.warning(f'Invalid float value for [{section}] {key}: {value}')
+            return fallback
+
     def get_host(self):
         """Get connection host"""
         return self.get('connection', 'host')
@@ -129,8 +141,11 @@ class ConfigLoader:
         return password
 
     def get_log_level(self):
-        """Get logging level"""
-        level_str = self.get('logging', 'level', 'INFO')
+        """Get logging level (None if not configured or invalid)"""
+        level_str = self.get('logging', 'level')
+        if not level_str:
+            return None
+
         levels = {
             'DEBUG': logging.DEBUG,
             'INFO': logging.INFO,
@@ -138,7 +153,19 @@ class ConfigLoader:
             'ERROR': logging.ERROR,
             'CRITICAL': logging.CRITICAL
         }
-        return levels.get(level_str.upper(), logging.INFO)
+        return levels.get(level_str.upper())
+
+    def get_max_history(self, default):
+        """Get command history length from [ui] section"""
+        return self.get_int('ui', 'max_history', default)
+
+    def get_quit_timeout(self, default):
+        """Get quit confirmation timeout from [behavior] section"""
+        return self.get_float('behavior', 'quit_timeout', default)
+
+    def get_respawn_delay(self, default):
+        """Get respawn delay from [behavior] section"""
+        return self.get_float('behavior', 'respawn_delay', default)
 
 
 def create_example_config():