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/jsonfile/LICENSE

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+(The MIT License)
+
+Copyright (c) 2012-2015, JP Richardson <jprichardson@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files
+(the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify,
+ merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/jsonfile/README.md

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+Node.js - jsonfile
+================
+
+Easily read/write JSON files in Node.js. _Note: this module cannot be used in the browser._
+
+[![npm Package](https://img.shields.io/npm/v/jsonfile.svg?style=flat-square)](https://www.npmjs.org/package/jsonfile)
+[![linux build status](https://img.shields.io/github/actions/workflow/status/jprichardson/node-jsonfile/ci.yml?branch=master)](https://github.com/jprichardson/node-jsonfile/actions?query=branch%3Amaster)
+[![windows Build status](https://img.shields.io/appveyor/ci/jprichardson/node-jsonfile/master.svg?label=windows%20build)](https://ci.appveyor.com/project/jprichardson/node-jsonfile/branch/master)
+
+<a href="https://github.com/feross/standard"><img src="https://cdn.rawgit.com/feross/standard/master/sticker.svg" alt="Standard JavaScript" width="100"></a>
+
+Why?
+----
+
+Writing `JSON.stringify()` and then `fs.writeFile()` and `JSON.parse()` with `fs.readFile()` enclosed in `try/catch` blocks became annoying.
+
+
+
+Installation
+------------
+
+    npm install --save jsonfile
+
+
+
+API
+---
+
+* [`readFile(filename, [options], callback)`](#readfilefilename-options-callback)
+* [`readFileSync(filename, [options])`](#readfilesyncfilename-options)
+* [`writeFile(filename, obj, [options], callback)`](#writefilefilename-obj-options-callback)
+* [`writeFileSync(filename, obj, [options])`](#writefilesyncfilename-obj-options)
+
+----
+
+### readFile(filename, [options], callback)
+
+`options` (`object`, default `undefined`): Pass in any [`fs.readFile`](https://nodejs.org/api/fs.html#fs_fs_readfile_path_options_callback) options or set `reviver` for a [JSON reviver](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse).
+  - `throws` (`boolean`, default: `true`). If `JSON.parse` throws an error, pass this error to the callback.
+  If `false`, returns `null` for the object.
+
+
+```js
+const jsonfile = require('jsonfile')
+const file = '/tmp/data.json'
+jsonfile.readFile(file, function (err, obj) {
+  if (err) console.error(err)
+  console.dir(obj)
+})
+```
+
+You can also use this method with promises. The `readFile` method will return a promise if you do not pass a callback function.
+
+```js
+const jsonfile = require('jsonfile')
+const file = '/tmp/data.json'
+jsonfile.readFile(file)
+  .then(obj => console.dir(obj))
+  .catch(error => console.error(error))
+```
+
+----
+
+### readFileSync(filename, [options])
+
+`options` (`object`, default `undefined`): Pass in any [`fs.readFileSync`](https://nodejs.org/api/fs.html#fs_fs_readfilesync_path_options) options or set `reviver` for a [JSON reviver](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse).
+- `throws` (`boolean`, default: `true`). If an error is encountered reading or parsing the file, throw the error. If `false`, returns `null` for the object.
+
+```js
+const jsonfile = require('jsonfile')
+const file = '/tmp/data.json'
+
+console.dir(jsonfile.readFileSync(file))
+```
+
+----
+
+### writeFile(filename, obj, [options], callback)
+
+`options`: Pass in any [`fs.writeFile`](https://nodejs.org/api/fs.html#fs_fs_writefile_file_data_options_callback) options or set `replacer` for a [JSON replacer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify). Can also pass in `spaces`, or override `EOL` string or set `finalEOL` flag as `false` to not save the file with `EOL` at the end.
+
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFile(file, obj, function (err) {
+  if (err) console.error(err)
+})
+```
+Or use with promises as follows:
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFile(file, obj)
+  .then(res => {
+    console.log('Write complete')
+  })
+  .catch(error => console.error(error))
+```
+
+
+**formatting with spaces:**
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFile(file, obj, { spaces: 2 }, function (err) {
+  if (err) console.error(err)
+})
+```
+
+**overriding EOL:**
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFile(file, obj, { spaces: 2, EOL: '\r\n' }, function (err) {
+  if (err) console.error(err)
+})
+```
+
+
+**disabling the EOL at the end of file:**
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFile(file, obj, { spaces: 2, finalEOL: false }, function (err) {
+  if (err) console.log(err)
+})
+```
+
+**appending to an existing JSON file:**
+
+You can use `fs.writeFile` option `{ flag: 'a' }` to achieve this.
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/mayAlreadyExistedData.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFile(file, obj, { flag: 'a' }, function (err) {
+  if (err) console.error(err)
+})
+```
+
+----
+
+### writeFileSync(filename, obj, [options])
+
+`options`: Pass in any [`fs.writeFileSync`](https://nodejs.org/api/fs.html#fs_fs_writefilesync_file_data_options) options or set `replacer` for a [JSON replacer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify). Can also pass in `spaces`, or override `EOL` string or set `finalEOL` flag as `false` to not save the file with `EOL` at the end.
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFileSync(file, obj)
+```
+
+**formatting with spaces:**
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFileSync(file, obj, { spaces: 2 })
+```
+
+**overriding EOL:**
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFileSync(file, obj, { spaces: 2, EOL: '\r\n' })
+```
+
+**disabling the EOL at the end of file:**
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/data.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFileSync(file, obj, { spaces: 2, finalEOL: false })
+```
+
+**appending to an existing JSON file:**
+
+You can use `fs.writeFileSync` option `{ flag: 'a' }` to achieve this.
+
+```js
+const jsonfile = require('jsonfile')
+
+const file = '/tmp/mayAlreadyExistedData.json'
+const obj = { name: 'JP' }
+
+jsonfile.writeFileSync(file, obj, { flag: 'a' })
+```
+
+License
+-------
+
+(MIT License)
+
+Copyright 2012-2016, JP Richardson  <jprichardson@gmail.com>

node_modules/jsonfile/index.js

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+let _fs
+try {
+  _fs = require('graceful-fs')
+} catch (_) {
+  _fs = require('fs')
+}
+const universalify = require('universalify')
+const { stringify, stripBom } = require('./utils')
+
+async function _readFile (file, options = {}) {
+  if (typeof options === 'string') {
+    options = { encoding: options }
+  }
+
+  const fs = options.fs || _fs
+
+  const shouldThrow = 'throws' in options ? options.throws : true
+
+  let data = await universalify.fromCallback(fs.readFile)(file, options)
+
+  data = stripBom(data)
+
+  let obj
+  try {
+    obj = JSON.parse(data, options ? options.reviver : null)
+  } catch (err) {
+    if (shouldThrow) {
+      err.message = `${file}: ${err.message}`
+      throw err
+    } else {
+      return null
+    }
+  }
+
+  return obj
+}
+
+const readFile = universalify.fromPromise(_readFile)
+
+function readFileSync (file, options = {}) {
+  if (typeof options === 'string') {
+    options = { encoding: options }
+  }
+
+  const fs = options.fs || _fs
+
+  const shouldThrow = 'throws' in options ? options.throws : true
+
+  try {
+    let content = fs.readFileSync(file, options)
+    content = stripBom(content)
+    return JSON.parse(content, options.reviver)
+  } catch (err) {
+    if (shouldThrow) {
+      err.message = `${file}: ${err.message}`
+      throw err
+    } else {
+      return null
+    }
+  }
+}
+
+async function _writeFile (file, obj, options = {}) {
+  const fs = options.fs || _fs
+
+  const str = stringify(obj, options)
+
+  await universalify.fromCallback(fs.writeFile)(file, str, options)
+}
+
+const writeFile = universalify.fromPromise(_writeFile)
+
+function writeFileSync (file, obj, options = {}) {
+  const fs = options.fs || _fs
+
+  const str = stringify(obj, options)
+  // not sure if fs.writeFileSync returns anything, but just in case
+  return fs.writeFileSync(file, str, options)
+}
+
+// NOTE: do not change this export format; required for ESM compat
+// see https://github.com/jprichardson/node-jsonfile/pull/162 for details
+module.exports = {
+  readFile,
+  readFileSync,
+  writeFile,
+  writeFileSync
+}

node_modules/jsonfile/package.json

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+{
+  "name": "jsonfile",
+  "version": "6.2.0",
+  "description": "Easily read/write JSON files.",
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:jprichardson/node-jsonfile.git"
+  },
+  "keywords": [
+    "read",
+    "write",
+    "file",
+    "json",
+    "fs",
+    "fs-extra"
+  ],
+  "author": "JP Richardson <jprichardson@gmail.com>",
+  "license": "MIT",
+  "dependencies": {
+    "universalify": "^2.0.0"
+  },
+  "optionalDependencies": {
+    "graceful-fs": "^4.1.6"
+  },
+  "devDependencies": {
+    "mocha": "^8.2.0",
+    "rimraf": "^2.4.0",
+    "standard": "^16.0.1"
+  },
+  "main": "index.js",
+  "files": [
+    "index.js",
+    "utils.js"
+  ],
+  "scripts": {
+    "lint": "standard",
+    "test": "npm run lint && npm run unit",
+    "unit": "mocha"
+  }
+}

node_modules/jsonfile/utils.js

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+function stringify (obj, { EOL = '\n', finalEOL = true, replacer = null, spaces } = {}) {
+  const EOF = finalEOL ? EOL : ''
+  const str = JSON.stringify(obj, replacer, spaces)
+
+  return str.replace(/\n/g, EOL) + EOF
+}
+
+function stripBom (content) {
+  // we do this because JSON.parse would convert it to a utf8 string if encoding wasn't specified
+  if (Buffer.isBuffer(content)) content = content.toString('utf8')
+  return content.replace(/^\uFEFF/, '')
+}
+
+module.exports = { stringify, stripBom }