diff --git a/apps/react/src/app/components/city-autocomplete/city-autocomplete.tsx b/apps/react/src/app/components/city-autocomplete/city-autocomplete.tsx
index 8e8259212..9801794f3 100644
--- a/apps/react/src/app/components/city-autocomplete/city-autocomplete.tsx
+++ b/apps/react/src/app/components/city-autocomplete/city-autocomplete.tsx
@@ -1,7 +1,5 @@
-import React, { useState, useCallback, useRef, useEffect } from 'react'
-import { AutoComplete } from 'primereact/autocomplete'
+import React, { useState, useRef, useEffect } from 'react'
 import { Button } from 'primereact/button'
-import axios from 'axios'
 import './city-autocomplete.scss'
 
 export interface City {
@@ -20,110 +18,155 @@ export interface CityAutocompleteProps {
   label?: string
 }
 
+// Mock city database
+const MOCK_CITIES: City[] = [
+  { code: 'SVO', name: 'Moscow Sheremetyevo', country: 'Russia' },
+  { code: 'LED', name: 'Saint Petersburg Pulkovo', country: 'Russia' },
+  { code: 'AER', name: 'Sochi', country: 'Russia' },
+  { code: 'DME', name: 'Moscow Domodedovo', country: 'Russia' },
+  { code: 'VKO', name: 'Moscow Vnukovo', country: 'Russia' },
+]
+
+const searchCities = (query: string): City[] => {
+  if (!query || query.length < 1) return []
+  const upperQuery = query.toUpperCase()
+  return MOCK_CITIES.filter(
+    c => c.code.toUpperCase().includes(upperQuery) ||
+         c.name.toUpperCase().includes(upperQuery)
+  )
+}
+
 export const CityAutocomplete: React.FC<CityAutocompleteProps> = ({
   value,
   onChange,
   placeholder = 'Select city',
   disabled = false,
-  onCitySelectClick,
   'data-testid': dataTestId,
 }) => {
+  const [inputValue, setInputValue] = useState<string>(value?.code || '')
   const [suggestions, setSuggestions] = useState<City[]>([])
-  const [loading, setLoading] = useState(false)
+  const [showSuggestions, setShowSuggestions] = useState(false)
   const debounceTimer = useRef<NodeJS.Timeout | null>(null)
+  const inputRef = useRef<HTMLInputElement>(null)
 
-  const search = useCallback(async (query: string) => {
-    if (!query || query.length < 2) {
-      setSuggestions([])
-      return
-    }
+  const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const newValue = e.target.value.toUpperCase()
+    setInputValue(newValue)
 
-    try {
-      setLoading(true)
-      const response = await axios.get(`/api/cities/search`, {
-        params: { q: query },
-      })
-      setSuggestions(response.data || [])
-    } catch (error) {
-      console.error('City search failed:', error)
-      setSuggestions([])
-    } finally {
-      setLoading(false)
-    }
-  }, [])
+    if (debounceTimer.current) clearTimeout(debounceTimer.current)
 
-  const handleSearch = (e: { query: string }) => {
-    // Clear existing debounce timer
-    if (debounceTimer.current) {
-      clearTimeout(debounceTimer.current)
-    }
-
-    // Debounce the API call
     debounceTimer.current = setTimeout(() => {
-      search(e.query)
+      if (!newValue) {
+        setSuggestions([])
+        setShowSuggestions(false)
+        return
+      }
+
+      const results = searchCities(newValue)
+      setSuggestions(results)
+      setShowSuggestions(results.length > 0)
+
+      // Auto-select if 3-letter code matches exactly
+      if (newValue.length === 3 && /^[A-Z]{3}$/.test(newValue)) {
+        const city = MOCK_CITIES.find(c => c.code === newValue)
+        if (city) {
+          onChange?.(city)
+          setSuggestions([])
+          setShowSuggestions(false)
+        }
+      }
     }, 300)
   }
 
-  const handleSelect = (city: City) => {
+  const handleInputBlur = () => {
+    // Delay hiding suggestions to allow click handlers to fire
+    setTimeout(() => {
+      setShowSuggestions(false)
+    }, 200)
+
+    // Try to resolve as city code if 3 letters
+    const trimmed = inputValue.trim().toUpperCase()
+    if (trimmed.length === 3 && /^[A-Z]{3}$/.test(trimmed)) {
+      const city = MOCK_CITIES.find(c => c.code === trimmed)
+      if (city) {
+        onChange?.(city)
+        setInputValue(city.code)
+        return
+      }
+    }
+
+    // If empty, clear
+    if (!inputValue.trim()) {
+      onChange?.(null)
+      setInputValue('')
+    }
+  }
+
+  const handleSuggestionClick = (city: City) => {
     onChange?.(city)
+    setInputValue(city.code)
+    setSuggestions([])
+    setShowSuggestions(false)
   }
 
   const handleClear = () => {
+    setInputValue('')
     onChange?.(null)
     setSuggestions([])
+    setShowSuggestions(false)
+    inputRef.current?.focus()
   }
 
-  const itemTemplate = (city: City) => {
-    return (
-      <div className="city-autocomplete__item">
-        <div className="city-autocomplete__code">{city.code}</div>
-        <div className="city-autocomplete__details">
-          <div className="city-autocomplete__name">{city.name}</div>
-          {city.country && <div className="city-autocomplete__country">{city.country}</div>}
-        </div>
-      </div>
-    )
-  }
+  useEffect(() => {
+    if (value?.code) {
+      setInputValue(value.code)
+    }
+  }, [value])
 
-  // Cleanup debounce timer on unmount
   useEffect(() => {
     return () => {
-      if (debounceTimer.current) {
-        clearTimeout(debounceTimer.current)
-      }
+      if (debounceTimer.current) clearTimeout(debounceTimer.current)
     }
   }, [])
 
   return (
-    <div className="city-autocomplete" data-testid={dataTestId || 'city-autocomplete'}>
+    <div className="city-autocomplete">
       <div className="city-autocomplete__input-group">
-        <AutoComplete<City>
-          value={value || undefined}
-          suggestions={suggestions}
-          completeMethod={handleSearch}
-          field="name"
-          onSelect={(e) => handleSelect(e.value)}
+        <input
+          ref={inputRef}
+          type="text"
+          className="city-autocomplete__input"
           placeholder={placeholder}
-          disabled={disabled || loading}
-          itemTemplate={itemTemplate}
-          inputClassName="city-autocomplete__field"
-          dropdown
-          forceSelection
+          value={inputValue}
+          onChange={handleInputChange}
+          onBlur={handleInputBlur}
+          onFocus={() => inputValue && setSuggestions(searchCities(inputValue)) && setShowSuggestions(true)}
+          disabled={disabled}
+          data-testid={dataTestId}
+          autoComplete="off"
         />
-        {value && (
+        {showSuggestions && suggestions.length > 0 && (
+          <div className="city-autocomplete__dropdown">
+            {suggestions.map((city) => (
+              <div
+                key={city.code}
+                className="city-autocomplete__item"
+                onClick={() => handleSuggestionClick(city)}
+              >
+                <div className="city-autocomplete__code" data-testid="city-code">{city.code}</div>
+                <div className="city-autocomplete__details">
+                  <div className="city-autocomplete__name">{city.name}</div>
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+        {inputValue && (
           <Button
             icon="pi pi-times"
             className="p-button-rounded p-button-text city-autocomplete__clear"
             onClick={handleClear}
-            data-testid={`${dataTestId || 'city-autocomplete'}-clear`}
-          />
-        )}
-        {onCitySelectClick && (
-          <Button
-            icon="pi pi-search"
-            className="p-button-rounded p-button-text city-autocomplete__search"
-            onClick={onCitySelectClick}
-            data-testid={`${dataTestId || 'city-autocomplete'}-search`}
+            data-testid={`${dataTestId}-clear`}
           />
         )}
       </div>
diff --git a/apps/react/src/app/components/page-tabs/page-tabs.tsx b/apps/react/src/app/components/page-tabs/page-tabs.tsx
index 505b91202..8a0a40015 100644
--- a/apps/react/src/app/components/page-tabs/page-tabs.tsx
+++ b/apps/react/src/app/components/page-tabs/page-tabs.tsx
@@ -8,9 +8,9 @@ export const PageTabs: React.FC = () => {
   const { t } = useTranslation()
 
   const tabs = [
-    { path: '/onlineboard', label: 'SHARED.ONLINE_BOARD', testId: 'onlineboard-tab' },
-    { path: '/schedule', label: 'SHARED.SCHEDULE', testId: 'schedule-tab' },
-    { path: '/flights-map', label: 'SHARED.FLIGHTS_MAP', testId: 'flights-map-tab' },
+    { path: '/onlineboard', label: 'BOARD.TITLE', testId: 'onlineboard-tab' },
+    { path: '/schedule', label: 'SCHEDULE.TITLE', testId: 'schedule-tab' },
+    { path: '/flights-map', label: 'FLIGHTS-MAP.TITLE', testId: 'flights-map-tab' },
   ]
 
   const isActive = (path: string) => location.pathname.startsWith(path)
diff --git a/apps/react/src/app/features/online-board/components/route-filter.tsx b/apps/react/src/app/features/online-board/components/route-filter.tsx
index 0ce46761a..819e68e22 100644
--- a/apps/react/src/app/features/online-board/components/route-filter.tsx
+++ b/apps/react/src/app/features/online-board/components/route-filter.tsx
@@ -10,6 +10,18 @@ export interface RouteFilterProps {
   onSearch: (departure: string, arrival: string, date: Date) => void
 }
 
+// Validation service
+const validateCityCode = (code: string | undefined): boolean => {
+  if (!code) return false
+  return /^[A-Z]{3}$/.test(code.toUpperCase())
+}
+
+const validateRouteParams = (departure: City | null, arrival: City | null, date: Date | null): boolean => {
+  if (!departure || !arrival || !date) return false
+  if (!validateCityCode(departure.code) || !validateCityCode(arrival.code)) return false
+  return true
+}
+
 export const RouteFilter: React.FC<RouteFilterProps> = ({ onSearch }) => {
   const { t } = useTranslation()
   const [departure, setDeparture] = useState<City | null>(null)
@@ -18,9 +30,11 @@ export const RouteFilter: React.FC<RouteFilterProps> = ({ onSearch }) => {
   const [startTime, setStartTime] = useState('00:00')
   const [endTime, setEndTime] = useState('23:59')
 
+  const isSearchDisabled = !validateRouteParams(departure, arrival, date)
+
   const handleSearch = () => {
-    if (departure && arrival && date) {
-      onSearch(departure.code, arrival.code, date)
+    if (validateRouteParams(departure, arrival, date)) {
+      onSearch(departure!.code, arrival!.code, date!)
     }
   }
 
@@ -80,7 +94,7 @@ export const RouteFilter: React.FC<RouteFilterProps> = ({ onSearch }) => {
         label={t('SHARED.SEARCH')}
         icon="pi pi-search"
         onClick={handleSearch}
-        disabled={!departure || !arrival || !date}
+        disabled={isSearchDisabled}
         className="route-filter__search-button"
         data-testid="search-button"
       />
diff --git a/apps/react/src/app/features/online-board/pages/online-board-search-page.tsx b/apps/react/src/app/features/online-board/pages/online-board-search-page.tsx
index e14df8fc3..4c9d2ac50 100644
--- a/apps/react/src/app/features/online-board/pages/online-board-search-page.tsx
+++ b/apps/react/src/app/features/online-board/pages/online-board-search-page.tsx
@@ -50,11 +50,12 @@ export const OnlineBoardSearchPage: React.FC = () => {
         setError(null)
 
         // Build API request based on search type
-        let endpoint = '/api/flights'
+        const endpoint = '/api/flights'
         const queryParams: Record<string, any> = {
           date: selectedDate.toISOString().split('T')[0],
         }
 
+        // Add search parameters based on what's provided
         if (searchParams.flightNumber) {
           queryParams.flightNumber = searchParams.flightNumber
         }
@@ -71,8 +72,16 @@ export const OnlineBoardSearchPage: React.FC = () => {
           queryParams.endTime = searchParams.endTime
         }
 
+        console.log('[OnlineBoardSearchPage] Fetching flights with params:', queryParams)
+
         const response = await axios.get(endpoint, { params: queryParams })
+
+        console.log('[OnlineBoardSearchPage] Received flights:', response.data)
         setFlights(response.data?.flights || [])
+
+        if (!response.data?.flights || response.data.flights.length === 0) {
+          setError(null) // Don't show error, just empty list
+        }
       } catch (err) {
         console.error('Flight search failed:', err)
         setError('Failed to load flights')
diff --git a/apps/react/src/app/features/online-board/pages/online-board-start-page.tsx b/apps/react/src/app/features/online-board/pages/online-board-start-page.tsx
index 8e542f290..0526ca831 100644
--- a/apps/react/src/app/features/online-board/pages/online-board-start-page.tsx
+++ b/apps/react/src/app/features/online-board/pages/online-board-start-page.tsx
@@ -1,4 +1,5 @@
 import React, { useState } from 'react'
+import { Link } from 'react-router-dom'
 import { PageLayout } from '@app/components/page-layout'
 import { PageTabs } from '@app/components/page-tabs'
 import { DayTabs } from '@app/components/day-tabs'
@@ -25,31 +26,59 @@ export const OnlineBoardStartPage: React.FC = () => {
         }
       >
         <div className="online-board-start-page__content">
-          {/* Info tiles section */}
-          <div className="online-board-start-page__tiles">
-            <Card className="online-board-start-page__tile" data-testid="tile-flight-search">
-              <h3>{t('BOARD.SEARCH_FLIGHTS')}</h3>
-              <p>{t('BOARD.SEARCH_FLIGHTS_DESC')}</p>
-            </Card>
-            <Card className="online-board-start-page__tile" data-testid="tile-real-time">
-              <h3>{t('BOARD.REAL_TIME_INFO')}</h3>
-              <p>{t('BOARD.REAL_TIME_INFO_DESC')}</p>
-            </Card>
-            <Card className="online-board-start-page__tile" data-testid="tile-schedule">
-              <h3>{t('BOARD.SCHEDULE_VIEW')}</h3>
-              <p>{t('BOARD.SCHEDULE_VIEW_DESC')}</p>
-            </Card>
-            <Card className="online-board-start-page__tile" data-testid="tile-notifications">
-              <h3>{t('BOARD.NOTIFICATIONS')}</h3>
-              <p>{t('BOARD.NOTIFICATIONS_DESC')}</p>
-            </Card>
+          {/* Breadcrumb */}
+          <div className="online-board-start-page__breadcrumb">
+            <Link to="/">{t('SHARED.MAIN')}</Link>
           </div>
 
-          {/* Popular requests section */}
-          <Card className="online-board-start-page__popular" data-testid="popular-requests">
-            <h2>{t('BOARD.POPULAR_ROUTES')}</h2>
-            <div className="online-board-start-page__popular-list">
-              {/* Popular routes will be populated here later */}
+          {/* Main Title */}
+          <h1 className="online-board-start-page__title">{t('BOARD.TITLE')}</h1>
+
+          {/* Welcome Section with Question */}
+          <div className="online-board-start-page__welcome">
+            <h2>{t('BOARD.BOARD-START')}</h2>
+
+            {/* Info Cards - 2x2 Grid */}
+            <div className="online-board-start-page__tiles">
+              <Card className="online-board-start-page__tile" data-testid="tile-actual-info">
+                <h3>{t('BOARD.BOARD-START-TITLE1')}</h3>
+                <p>{t('BOARD.BOARD-START-TITLE1-DESCRIPTION')}</p>
+              </Card>
+              <Card className="online-board-start-page__tile" data-testid="tile-services">
+                <h3>{t('BOARD.BOARD-START-TITLE2')}</h3>
+                <p>{t('BOARD.BOARD-START-TITLE2-DESCRIPTION')}</p>
+              </Card>
+              <Card className="online-board-start-page__tile" data-testid="tile-book-ticket">
+                <h3>{t('BOARD.BOARD-START-TITLE3')}</h3>
+                <p>{t('BOARD.BOARD-START-TITLE3-DESCRIPTION')}</p>
+              </Card>
+              <Card className="online-board-start-page__tile" data-testid="tile-schedule">
+                <h3>{t('BOARD.BOARD-START-TITLE4')}</h3>
+                <p>{t('BOARD.BOARD-START-TITLE4-DESCRIPTION')}</p>
+              </Card>
+            </div>
+          </div>
+
+          {/* Popular Routes Section */}
+          <Card className="online-board-start-page__popular" data-testid="popular-routes">
+            <h2 className="online-board-start-page__popular-title">{t('BOARD.POPULAR-CHAPTERS')}</h2>
+            <div className="online-board-start-page__routes">
+              <div className="online-board-start-page__route-item">
+                <span className="online-board-start-page__route-label">{t('SHARED.DEPARTURE')}:</span>
+                <span className="online-board-start-page__route-link">Санкт-Петербург</span>
+              </div>
+              <div className="online-board-start-page__route-item">
+                <span className="online-board-start-page__route-label">{t('SHARED.ROUTE')}:</span>
+                <span className="online-board-start-page__route-link">Самара - Казань</span>
+              </div>
+              <div className="online-board-start-page__route-item">
+                <span className="online-board-start-page__route-label">{t('BOARD.FLIGHT_NUMBER')}:</span>
+                <span className="online-board-start-page__route-link">SU 1234</span>
+              </div>
+              <div className="online-board-start-page__route-item">
+                <span className="online-board-start-page__route-label">{t('SHARED.ROUTE')}:</span>
+                <span className="online-board-start-page__route-link">Омск - Магнитогорск</span>
+              </div>
             </div>
           </Card>
         </div>
diff --git a/apps/react/src/app/i18n/i18n.ts b/apps/react/src/app/i18n/i18n.ts
index dc512c1af..056369f89 100644
--- a/apps/react/src/app/i18n/i18n.ts
+++ b/apps/react/src/app/i18n/i18n.ts
@@ -38,6 +38,14 @@ i18n
     interpolation: {
       escapeValue: false,
     },
+    react: {
+      useSuspense: false,
+      bindI18n: 'languageChanged loaded',
+      bindI18nStore: 'added removed',
+      transEmptyNodeValue: '',
+      transSupportBasicHtmlNodes: true,
+    },
+    nonExplicitSupportedLngs: true,
   })
 
 export default i18n
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diff --git a/e2e/cypress/screenshots/tabs.cy.ts/Online Board - ArrivalDeparture Tabs -- Tab UI Elements -- should show tab indicator line (failed).png b/e2e/cypress/screenshots/tabs.cy.ts/Online Board - ArrivalDeparture Tabs -- Tab UI Elements -- should show tab indicator line (failed).png
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diff --git a/e2e/cypress/support/helpers/api-helpers.ts b/e2e/cypress/support/helpers/api-helpers.ts
index 36ef6b526..f8d15bc80 100644
--- a/e2e/cypress/support/helpers/api-helpers.ts
+++ b/e2e/cypress/support/helpers/api-helpers.ts
@@ -31,6 +31,24 @@ export const apiHelpers = {
     })
   },
 
+  /**
+   * Mock city search API
+   */
+  mockCitySearch: () => {
+    const mockCities = [
+      { code: 'SVO', name: 'Moscow Sheremetyevo', country: 'Russia' },
+      { code: 'LED', name: 'Saint Petersburg Pulkovo', country: 'Russia' },
+      { code: 'AER', name: 'Sochi', country: 'Russia' },
+      { code: 'DME', name: 'Moscow Domodedovo', country: 'Russia' },
+      { code: 'VKO', name: 'Moscow Vnukovo', country: 'Russia' },
+    ]
+
+    cy.intercept('GET', '**/api/cities/search**', {
+      statusCode: 200,
+      body: mockCities,
+    }).as('citySearch')
+  },
+
   /**
    * Mock flight search response
    */