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/performance-now/test/scripts/delayed-call.coffee

@@ -0,0 +1,11 @@
+#!/usr/bin/env ./node_modules/.bin/coffee
+
+###
+Expected output is a number above 350 and below 600.
+The time reported is relative to the time the node.js process was started
+this is approximately at `(Date.now() process.uptime() * 1000)`
+###
+
+delay = require "call-delayed"
+now = require "../../lib/performance-now"
+delay 250, -> console.log now().toFixed 3

node_modules/performance-now/test/scripts/delayed-require.coffee

@@ -0,0 +1,12 @@
+#!/usr/bin/env ./node_modules/.bin/coffee
+
+###
+Expected output is a number above 350 and below 600.
+The time reported is relative to the time the node.js process was started
+this is approximately at `(Date.now() process.uptime() * 1000)`
+###
+
+delay = require "call-delayed"
+delay 250, ->
+  now = require "../../lib/performance-now"
+  console.log now().toFixed 3

node_modules/performance-now/test/scripts/difference.coffee

@@ -0,0 +1,6 @@
+#!/usr/bin/env ./node_modules/.bin/coffee
+
+# Expected output is above 0.005 and below 0.07.
+
+now = require('../../lib/performance-now')
+console.log -(now() - now()).toFixed 3

node_modules/performance-now/test/scripts/initial-value.coffee

@@ -0,0 +1,10 @@
+#!/usr/bin/env ./node_modules/.bin/coffee
+
+###
+Expected output is a number above 100 and below 350.
+The time reported is relative to the time the node.js process was started
+this is approximately at `(Date.now() process.uptime() * 1000)`
+###
+
+now = require '../../lib/performance-now'
+console.log now().toFixed 3