Initial commit: Aeroflot Flights Web - Angular 12 baseline

- Angular 12 application with PrimeNG components
- 5 existing Cypress e2e test suites
- SCSS styling with BEM naming convention
- i18n support (10 languages)
- Leaflet map integration
- Complete component hierarchy and routing structure

This baseline will be used for Angular → React migration.

ClientApp/node_modules/lodash/upperFirst.js

@@ -0,0 +1,22 @@
+var createCaseFirst = require('./_createCaseFirst');
+
+/**
+ * Converts the first character of `string` to upper case.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category String
+ * @param {string} [string=''] The string to convert.
+ * @returns {string} Returns the converted string.
+ * @example
+ *
+ * _.upperFirst('fred');
+ * // => 'Fred'
+ *
+ * _.upperFirst('FRED');
+ * // => 'FRED'
+ */
+var upperFirst = createCaseFirst('toUpperCase');
+
+module.exports = upperFirst;