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.

e2e/node_modules/@angular-devkit/schematics/tasks/node/index.d.ts

@@ -0,0 +1,15 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+import { TaskExecutorFactory } from '../../src';
+import { NodePackageTaskFactoryOptions } from '../package-manager/options';
+import { RepositoryInitializerTaskFactoryOptions } from '../repo-init/options';
+export declare class BuiltinTaskExecutor {
+    static readonly NodePackage: TaskExecutorFactory<NodePackageTaskFactoryOptions>;
+    static readonly RepositoryInitializer: TaskExecutorFactory<RepositoryInitializerTaskFactoryOptions>;
+    static readonly RunSchematic: TaskExecutorFactory<{}>;
+}

e2e/node_modules/@angular-devkit/schematics/tasks/node/index.js

@@ -0,0 +1,35 @@
+"use strict";
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.BuiltinTaskExecutor = void 0;
+const executor_1 = __importDefault(require("../package-manager/executor"));
+const options_1 = require("../package-manager/options");
+const executor_2 = __importDefault(require("../repo-init/executor"));
+const options_2 = require("../repo-init/options");
+const executor_3 = __importDefault(require("../run-schematic/executor"));
+const options_3 = require("../run-schematic/options");
+class BuiltinTaskExecutor {
+    static NodePackage = {
+        name: options_1.NodePackageName,
+        create: async (options) => (0, executor_1.default)(options),
+    };
+    static RepositoryInitializer = {
+        name: options_2.RepositoryInitializerName,
+        create: async (options) => (0, executor_2.default)(options),
+    };
+    static RunSchematic = {
+        name: options_3.RunSchematicName,
+        create: async () => (0, executor_3.default)(),
+    };
+}
+exports.BuiltinTaskExecutor = BuiltinTaskExecutor;
+//# sourceMappingURL=index.js.map

e2e/node_modules/@angular-devkit/schematics/tasks/node/index.js.map

@@ -0,0 +1 @@
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