Add doc to script file

src/components/settings.tsx

@@ -1,3 +1,14 @@
+/**
+ * Settings Component
+ *
+ * Provides configuration for pharmacokinetic parameters (half-lives,
+ * absorption rates) and UI settings (chart view, therapeutic ranges,
+ * x-axis format). Includes data management (import/export/reset).
+ *
+ * @author Andreas Weyer
+ * @license MIT
+ */
+
 import React from 'react';
 import { FormNumericInput } from './ui/form-numeric-input';
 import { Card, CardContent, CardHeader, CardTitle } from './ui/card';