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/async/priorityQueue.js

@@ -0,0 +1,60 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+exports.default = function (worker, concurrency) {
+    // Start with a normal queue
+    var q = (0, _queue2.default)(worker, concurrency);
+
+    var {
+        push,
+        pushAsync
+    } = q;
+
+    q._tasks = new _Heap2.default();
+    q._createTaskItem = ({ data, priority }, callback) => {
+        return {
+            data,
+            priority,
+            callback
+        };
+    };
+
+    function createDataItems(tasks, priority) {
+        if (!Array.isArray(tasks)) {
+            return { data: tasks, priority };
+        }
+        return tasks.map(data => {
+            return { data, priority };
+        });
+    }
+
+    // Override push to accept second parameter representing priority
+    q.push = function (data, priority = 0, callback) {
+        return push(createDataItems(data, priority), callback);
+    };
+
+    q.pushAsync = function (data, priority = 0, callback) {
+        return pushAsync(createDataItems(data, priority), callback);
+    };
+
+    // Remove unshift functions
+    delete q.unshift;
+    delete q.unshiftAsync;
+
+    return q;
+};
+
+var _queue = require('./queue.js');
+
+var _queue2 = _interopRequireDefault(_queue);
+
+var _Heap = require('./internal/Heap.js');
+
+var _Heap2 = _interopRequireDefault(_Heap);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+module.exports = exports.default;