♻️(frontend) extract feature flag into a dedicated enum

Extract code elements related to feature flag into a proper enum
to avoid hardcoded literals.

src/frontend/src/features/analytics/enums.ts

@@ -0,0 +1,4 @@
+export enum FeatureFlags {
+  Transcript = 'transcription-summary',
+  faceLandmarks = 'face-landmarks',
+}

src/frontend/src/features/recording/hooks/useHasRecordingAccess.ts

@@ -3,10 +3,11 @@ import { useIsAnalyticsEnabled } from '@/features/analytics/hooks/useIsAnalytics
 import { RecordingMode } from '../types'
 import { useIsRecordingModeEnabled } from './useIsRecordingModeEnabled'
 import { useIsAdminOrOwner } from '@/features/rooms/livekit/hooks/useIsAdminOrOwner'
+import { FeatureFlags } from '@/features/analytics/enums'
 
 export const useHasRecordingAccess = (
   mode: RecordingMode,
-  featureFlag: string
+  featureFlag: FeatureFlags
 ) => {
   const featureEnabled = useFeatureFlagEnabled(featureFlag)
   const isAnalyticsEnabled = useIsAnalyticsEnabled()

src/frontend/src/features/rooms/livekit/components/Transcript.tsx

@@ -23,6 +23,7 @@ import {
   BETA_USERS_FORM_URL,
   CRISP_HELP_ARTICLE_TRANSCRIPT,
 } from '@/utils/constants'
+import { FeatureFlags } from '@/features/analytics/enums'
 
 export const Transcript = () => {
   const [isLoading, setIsLoading] = useState(false)
@@ -30,7 +31,7 @@ export const Transcript = () => {
 
   const hasTranscriptAccess = useHasRecordingAccess(
     RecordingMode.Transcript,
-    'transcription-summary'
+    FeatureFlags.Transcript
   )
   const roomId = useRoomId()
 

src/frontend/src/features/rooms/livekit/hooks/useHasFaceLandmarksAccess.ts

@@ -1,8 +1,9 @@
 import { useFeatureFlagEnabled } from 'posthog-js/react'
 import { useIsAnalyticsEnabled } from '@/features/analytics/hooks/useIsAnalyticsEnabled'
+import { FeatureFlags } from '@/features/analytics/enums'
 
 export const useHasFaceLandmarksAccess = () => {
-  const featureEnabled = useFeatureFlagEnabled('face-landmarks')
+  const featureEnabled = useFeatureFlagEnabled(FeatureFlags.faceLandmarks)
   const isAnalyticsEnabled = useIsAnalyticsEnabled()
 
   return featureEnabled || !isAnalyticsEnabled