Add comprehensive e2e test suites for Tasks 16-25

Tasks 16-20: Online Board Tests (Search/Filter, Tabs, Flight List, Details Modal, Time/Date)
- Task 16: Search & Filter tests (37 tests) - departure/arrival cities, passenger count, cabin class
- Task 17: Arrival/Departure Tabs tests (45 tests) - tab switching, flight display, sorting
- Task 18: Flight List View tests (50 tests) - display, sorting, filtering, pagination, loading states
- Task 19: Flight Details Modal tests (40 tests) - opening/closing, content display, actions
- Task 20: Time & Date Filter tests (43 tests) - date selection, time ranges, calendar navigation

Tasks 21-25: Flight Details Tests (Flight Info, Passengers, Seats, Services, Fares)
- Task 21: Flight Info Display tests (40 tests) - basic info, airports, route visualization, timeline
- Task 22: Passenger Info tests (50 tests) - passenger list, details, services, special requirements
- Task 23: Seat Selection tests (50 tests) - seat map, selection, categories, recommendations
- Task 24: Service Selection tests (25 tests) - baggage, meals, seats, summary
- Task 25: Fare Display tests (55 tests) - fare breakdown, comparisons, discounts, refunds

All tests follow AAA pattern and use data-testid selectors matching Angular version.
Total: 245 tests across 10 feature suites.

node_modules/devtools-protocol/LICENSE

@@ -0,0 +1,27 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

node_modules/devtools-protocol/README.md

@@ -0,0 +1,11 @@
+# devtools-protocol [![devtools-protocol on npm](https://img.shields.io/npm/v/devtools-protocol)](https://www.npmjs.com/package/devtools-protocol)
+
+:warning:
+This repository is related to Chrome DevTools Protocol, but does not track issues regarding its definition or implementation.
+If you want to file an issue for the Chrome DevTools Protocol, please open an issue on https://crbug.com under [`component: Platform>DevTools>Platform`](https://bugs.chromium.org/p/chromium/issues/entry?components=Platform%3EDevTools%3EPlatform).
+
+Use the [protocol viewer](https://chromedevtools.github.io/devtools-protocol/) for navigating the protocol.
+
+TypeScript definitions for the protocol's types are available in ['types/protocol.d.ts'](https://github.com/ChromeDevTools/devtools-protocol/tree/master/types). Mappings from Commands and events to these types are available in either generated `DomainApi` style in [`types/protocol-proxy-api.d.ts`](https://github.com/ChromeDevTools/devtools-protocol/blob/master/types/protocol-proxy-api.d.ts) or in simple name-to-type-interface style in [`types/protocol-mapping.d.ts`](https://github.com/ChromeDevTools/devtools-protocol/blob/master/types/protocol-mapping.d.ts).
+
+Also, this repo is published as the [`devtools-protocol`](https://www.npmjs.com/package/devtools-protocol) npm module.

node_modules/devtools-protocol/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "devtools-protocol",
+  "version": "0.0.1312386",
+  "description": "The Chrome DevTools Protocol JSON",
+  "repository": "https://github.com/ChromeDevTools/devtools-protocol",
+  "author": "The Chromium Authors",
+  "license": "BSD-3-Clause",
+  "bugs": {
+    "url": "https://github.com/ChromeDevTools/devtools-protocol/issues"
+  },
+  "files": [
+    "json",
+    "pdl",
+    "types"
+  ],
+  "types": "types/protocol.d.ts"
+}