wip fix build

/**
 * Keeps permissionsStore aligned with the browser. The store is a cache,
 * never a second source of truth: every signal re-reads the browser via
 * syncPermissions() (single writer).
 *
 * Re-sync triggers, all event-driven — no polling:
 *  - devicechange: granting permission reveals device labels/ids, so this
 *    fires on grant in every browser INCLUDING Safari — replacing the
 *    previous 500ms Safari polling. (A denial is caught by the concurrent
 *    getUserMedia rejection → notePermissionDeniedFromGum.)
 *  - window focus: returning from the browser/system permission UI.
 *  - Permissions API 'change' events, where the query is supported.
 */

src/frontend/package-lock.json

@@ -22,7 +22,6 @@
         "@tanstack/react-query": "5.101.1",
         "@timephy/rnnoise-wasm": "1.0.0",
         "crisp-sdk-web": "1.1.2",
-        "derive-valtio": "0.2.0",
         "hoofd": "1.7.3",
         "humanize-duration": "3.33.2",
         "i18next": "26.3.1",
@@ -35,7 +34,7 @@
         "react-aria": "3.50.0",
         "react-aria-components": "1.19.0",
         "react-dom": "18.3.1",
-        "react-i18next": "^17.0.10",
+        "react-i18next": "17.0.8",
         "react-stately": "3.48.0",
         "use-sound": "5.0.0",
         "valtio": "2.3.2",
@@ -4710,15 +4709,6 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/derive-valtio": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/derive-valtio/-/derive-valtio-0.2.0.tgz",
-      "integrity": "sha512-6slhaFHtfaL3t5dLYaQt6s4G2xZymhu0Ktdl7OMeVk8+46RgR8ft6FL0Tr4F31W+yPH03nJe1SSP4JFy2hSMRA==",
-      "license": "MIT",
-      "peerDependencies": {
-        "valtio": ">=2.0.0-rc.0"
-      }
-    },
     "node_modules/detect-libc": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.1.2.tgz",
@@ -9432,9 +9422,9 @@
       }
     },
     "node_modules/react-i18next": {
-      "version": "17.0.10",
-      "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-17.0.10.tgz",
-      "integrity": "sha512-XneHftyYA774MJkkccSkZ5oKrUpCnXIPmxio3wemqrVzCRLWiGXOMbIzObrer03fNDEnm8g8R5yYls4HcE+esg==",
+      "version": "17.0.8",
+      "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-17.0.8.tgz",
+      "integrity": "sha512-0ooKbGLU8JXhe1zwpQUWIeXSgLPOfwJmgheWRIUpcoA0CpyabpGhayjdG+/eA5esC1AQ8h2jWpXjJfzQzeDOCw==",
       "license": "MIT",
       "dependencies": {
         "@babel/runtime": "^7.29.2",
@@ -9444,7 +9434,7 @@
       "peerDependencies": {
         "i18next": ">= 26.2.0",
         "react": ">= 16.8.0",
-        "typescript": "^5 || ^6 || ^7"
+        "typescript": "^5 || ^6"
       },
       "peerDependenciesMeta": {
         "react-dom": {

src/frontend/package.json

@@ -29,7 +29,6 @@
     "@tanstack/react-query": "5.101.1",
     "@timephy/rnnoise-wasm": "1.0.0",
     "crisp-sdk-web": "1.1.2",
-    "derive-valtio": "0.2.0",
     "hoofd": "1.7.3",
     "humanize-duration": "3.33.2",
     "i18next": "26.3.1",
@@ -42,7 +41,7 @@
     "react-aria": "3.50.0",
     "react-aria-components": "1.19.0",
     "react-dom": "18.3.1",
-    "react-i18next": "17.0.10",
+    "react-i18next": "17.0.8",
     "react-stately": "3.48.0",
     "use-sound": "5.0.0",
     "valtio": "2.3.2",

src/frontend/src/components/SoundTester.tsx

@@ -2,6 +2,7 @@ import { Button } from '@/primitives'
 import { useEffect, useRef, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import { useMediaDeviceSelect } from '@livekit/components-react'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const SoundTester = () => {
   const { t } = useTranslation('settings')
@@ -15,7 +16,10 @@ export const SoundTester = () => {
       try {
         await audioRef?.current?.setSinkId(deviceId)
       } catch (error) {
-        console.error(`Error setting sinkId: ${error}`)
+        reportError(
+          'device_switch_failure',
+          new Error(`Error setting sinkId: ${error}`)
+        )
       }
     }
     updateActiveId(activeDeviceId)

src/frontend/src/features/analytics/hooks/useAnalytics.ts

@@ -1,15 +1,8 @@
 import { useEffect } from 'react'
 import { useLocation } from 'wouter'
-import { type PostHog } from 'posthog-js'
 import { type ApiUser } from '@/features/auth/api/ApiUser'
 import { useUser } from '@/features/auth/api/useUser'
-
-let posthog: PostHog | null = null
-
-const getPosthog = async () => {
-  if (!posthog) posthog = (await import('posthog-js')).default
-  return posthog
-}
+import { getPosthog } from '../utils'
 
 export const startAnalyticsSession = (data: ApiUser) => {
   getPosthog().then((ph) => {

src/frontend/src/features/analytics/telemetry.ts

@@ -0,0 +1,140 @@
+import { getPosthog } from './utils'
+
+export const captureEvent = (
+  event: string,
+  props?: Record<string, unknown>
+) => {
+  void getPosthog()
+    .then((ph) => {
+      ph.capture(event, props)
+    })
+    .catch(() => {
+      /* telemetry must never break the app */
+    })
+  if (import.meta.env.DEV) {
+    console.warn(`[telemetry] ${event}`, props)
+  }
+}
+
+export type LogCode =
+  // media
+  | 'join_preview_failure'
+  | 'livekit_room_error'
+  | 'device_switch_failure'
+  | 'permission_poll_failure'
+  // non-media families
+  | 'participant_mute_api_failure'
+  | 'permissions_api_failure'
+  | 'effects_processor_failure'
+  | 'clipboard_failure'
+  | 'fullscreen_failure'
+  | 'publish_sources_failure'
+  | 'disconnect_failure'
+  | 'generic_failure'
+
+export const reportError = (
+  logCode: LogCode,
+  error: unknown,
+  extraInfo: Record<string, unknown> = {}
+): void => {
+  const e = error instanceof Error ? error : new Error(String(error))
+  void getPosthog()
+    .then((ph) => {
+      ph.captureException(e, {
+        log_code: logCode,
+        error_name: e.name,
+        error_message: e.message,
+        ...extraInfo,
+      })
+    })
+    .catch(() => {})
+  if (import.meta.env.DEV) {
+    console.warn(`[${logCode}]`, e, extraInfo)
+  }
+}
+
+export interface DeviceSnapshot {
+  cam_count: number
+  mic_count: number
+  out_count: number
+  labels_visible: boolean
+  saved_cam_present: boolean | null
+  saved_mic_present: boolean | null
+  saved_video_device_id_set: boolean
+  saved_audio_device_id_set: boolean
+  audio_enabled: boolean | null
+  video_enabled: boolean | null
+  cam_permission: PermissionState | 'unknown'
+  mic_permission: PermissionState | 'unknown'
+}
+
+/** Reads the persisted LiveKit user choices without importing the store. */
+const readPersistedChoices = (): {
+  videoDeviceId?: string
+  audioDeviceId?: string
+  videoEnabled?: boolean
+  audioEnabled?: boolean
+} => {
+  try {
+    return JSON.parse(localStorage.getItem('lk-user-choices') ?? '{}')
+  } catch {
+    return {}
+  }
+}
+
+const queryPermission = async (
+  name: 'camera' | 'microphone'
+): Promise<PermissionState | 'unknown'> => {
+  try {
+    const status = await navigator.permissions.query({
+      name: name as PermissionName,
+    })
+    return status.state
+  } catch {
+    return 'unknown'
+  }
+}
+
+export const deviceSnapshot = async (): Promise<DeviceSnapshot> => {
+  const choices = readPersistedChoices()
+  let devices: MediaDeviceInfo[] = []
+  try {
+    devices = await navigator.mediaDevices.enumerateDevices()
+  } catch {
+    /* snapshot stays partial */
+  }
+  const ofKind = (k: MediaDeviceKind) => devices.filter((d) => d.kind === k)
+  const present = (k: MediaDeviceKind, id?: string) =>
+    id ? ofKind(k).some((d) => d.deviceId === id) : null
+
+  const [cam_permission, mic_permission] = await Promise.all([
+    queryPermission('camera'),
+    queryPermission('microphone'),
+  ])
+
+  return {
+    cam_count: ofKind('videoinput').length,
+    mic_count: ofKind('audioinput').length,
+    out_count: ofKind('audiooutput').length,
+    labels_visible: devices.some((d) => !!d.label),
+    saved_cam_present: present('videoinput', choices.videoDeviceId),
+    saved_mic_present: present('audioinput', choices.audioDeviceId),
+    saved_video_device_id_set: !!choices.videoDeviceId,
+    saved_audio_device_id_set: !!choices.audioDeviceId,
+    audio_enabled: choices.audioEnabled ?? null,
+    video_enabled: choices.videoEnabled ?? null,
+    cam_permission,
+    mic_permission,
+  }
+}
+
+export const captureMediaEvent = async (
+  event:
+    | 'media-device-error'
+    | 'media-acquisition'
+    | 'media-device-topology'
+    | 'media-device-success',
+  props: Record<string, unknown>
+) => {
+  captureEvent(event, { ...props, ...(await deviceSnapshot()) })
+}

src/frontend/src/features/analytics/utils.ts

@@ -0,0 +1,8 @@
+import type { PostHog } from 'posthog-js'
+
+let posthog: PostHog | null = null
+
+export const getPosthog = async () => {
+  if (!posthog) posthog = (await import('posthog-js')).default
+  return posthog
+}

src/frontend/src/features/home/routes/Home.tsx

@@ -15,6 +15,7 @@ import { css } from '@/styled-system/css'
 import { useConfig } from '@/api/useConfig'
 import { LoginButton } from '@/components/LoginButton'
 import { LoadingScreen } from '@/components/LoadingScreen'
+import { reportError } from '@/features/analytics/telemetry'
 
 const Columns = ({ children }: { children?: ReactNode }) => {
   return (
@@ -160,7 +161,9 @@ const Home = () => {
           window.location.replace(data.external_home_url)
         } catch (error) {
           setRedirectFailed(true)
-          console.error('Site is not reachable:', error)
+          reportError('generic_failure', error, {
+            context: 'Site is not reachable:',
+          })
         }
       }
     }

src/frontend/src/features/notifications/utils.ts

@@ -4,6 +4,7 @@ import { NotificationDuration } from './NotificationDuration'
 import type { Participant } from 'livekit-client'
 import type { NotificationPayload } from './NotificationPayload'
 import type { RecordingMode } from '@/features/recording'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const notifyAutoMutedOnJoin = () => {
   toastQueue.add(
@@ -55,7 +56,9 @@ export const decodeNotificationDataReceived = (
     return parsed as NotificationPayload
   } catch (error) {
     // Handle errors appropriately for your application
-    console.error('Failed to decode notification payload:', error)
+    reportError('generic_failure', error, {
+      context: 'Failed to decode notification payload:',
+    })
     return
   }
 }

src/frontend/src/features/participants/api/lowerHandParticipants.ts

@@ -1,5 +1,6 @@
 import type { Participant } from 'livekit-client'
 import { useLowerHandParticipant } from './lowerHandParticipant'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const useLowerHandParticipants = () => {
   const { lowerHandParticipant } = useLowerHandParticipant()
@@ -11,7 +12,9 @@ export const useLowerHandParticipants = () => {
       )
       return Promise.all(promises)
     } catch (error) {
-      console.error('An error occurred while lowering hands :', error)
+      reportError('generic_failure', error, {
+        context: 'An error occurred while lowering hands :',
+      })
       throw new Error('An error occurred while lowering hands.', {
         cause: error,
       })

src/frontend/src/features/participants/api/updateParticipantRole.ts

@@ -1,6 +1,7 @@
 import { fetchApi } from '@/api/fetchApi'
 import { useRoomData } from '@/features/rooms/livekit/hooks/useRoomData'
 import { AssignableParticipantRole } from '@/features/rooms/api/ApiRoom'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const useParticipantRole = () => {
   const data = useRoomData()
@@ -22,8 +23,11 @@ export const useParticipantRole = () => {
         }),
       })
     } catch (error) {
-      console.error(
-        `Failed to update participant's role ${identity}: ${error instanceof Error ? error.message : 'Unknown error'}`
+      reportError(
+        'generic_failure',
+        new Error(
+          `Failed to update participant's role ${identity}: ${error instanceof Error ? error.message : 'Unknown error'}`
+        )
       )
     }
   }

src/frontend/src/features/participants/hooks/useWaitingParticipants.ts

@@ -10,6 +10,7 @@ import {
 } from '../../participants/api/listWaitingParticipants'
 import { decodeNotificationDataReceived } from '@/features/notifications/utils'
 import { NotificationType } from '@/features/notifications/NotificationType'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const POLL_INTERVAL_MS = 1000
 
@@ -87,7 +88,7 @@ export const useWaitingParticipants = () => {
 
       await refetchWaiting()
     } catch (e) {
-      console.error(e)
+      reportError('generic_failure', e)
       setListEnabled(true)
     }
   }

src/frontend/src/features/pip/components/PictureInPicturePortal.tsx

@@ -7,7 +7,9 @@ import { useEffect, useMemo } from 'react'
 import { CrossDocumentOverlaysContext } from '@/primitives/CrossDocumentOverlaysContext'
 
 const InternalPortal = ({ children }: { children: React.ReactNode }) => {
-  const pipStoreSnap = useSnapshot(documentPictureInPictureStore)
+  const pipStoreSnap = useSnapshot(documentPictureInPictureStore, {
+    sync: true,
+  })
 
   const container = useMemo(() => {
     return pipStoreSnap?.window?.document.getElementById('root')
@@ -19,7 +21,7 @@ const InternalPortal = ({ children }: { children: React.ReactNode }) => {
     }
   }, [])
 
-  if (!container) return null
+  if (!container || !container.isConnected) return null
 
   return createPortal(
     /**

src/frontend/src/features/pip/hooks/usePictureInPicture.ts

@@ -1,7 +1,9 @@
 import { ref, useSnapshot } from 'valtio'
 import { useCallback, useMemo } from 'react'
+import { flushSync } from 'react-dom'
 import { documentPictureInPictureStore } from '@/stores/documentPictureInPicture'
 import { useTranslation } from 'react-i18next'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const IS_PIP_SUPPORTED =
   typeof globalThis !== 'undefined' && 'documentPictureInPicture' in globalThis
@@ -73,7 +75,9 @@ export const usePictureInPicture = () => {
 
         const cleanUp = () => {
           if (documentPictureInPictureStore.window === pipWindow) {
-            documentPictureInPictureStore.window = null
+            flushSync(() => {
+              documentPictureInPictureStore.window = null
+            })
           }
         }
         pipWindow.addEventListener('pagehide', () => cleanUp(), { once: true })
@@ -83,7 +87,9 @@ export const usePictureInPicture = () => {
         documentPictureInPictureStore.window = ref(pipWindow)
       } catch (error) {
         // Avoid unhandled rejections if the user blocks or closes the request.
-        console.error('Failed to open Picture-in-Picture window', error)
+        reportError('generic_failure', error, {
+          context: 'Failed to open Picture-in-Picture window',
+        })
         return null
       }
     },

src/frontend/src/features/recording/components/ScreenRecordingSidePanel.tsx

@@ -16,7 +16,6 @@ import {
   notifyRecordingSaveInProgress,
   useNotifyParticipants,
 } from '@/features/notifications'
-import posthog from 'posthog-js'
 import { useConfig } from '@/api/useConfig'
 import { NoAccessView } from './NoAccessView'
 import { ControlsButton } from './ControlsButton'
@@ -29,6 +28,7 @@ import { useSidePanel } from '@/features/rooms/livekit/hooks/useSidePanel'
 import { useIsAdminOrOwner } from '@/features/rooms/livekit/hooks/useIsAdminOrOwner'
 import { FeatureFlags } from '@/features/analytics/enums'
 import { LimitDescription } from './LimitDescription'
+import { captureEvent, reportError } from '@/features/analytics/telemetry'
 
 export const ScreenRecordingSidePanel = () => {
   const { data } = useConfig()
@@ -63,7 +63,7 @@ export const ScreenRecordingSidePanel = () => {
     await notifyParticipants({
       type: NotificationType.ScreenRecordingRequested,
     })
-    posthog.capture('screen-recording-requested', {})
+    captureEvent('screen-recording-requested', {})
   }
 
   const handleScreenRecording = async () => {
@@ -100,13 +100,15 @@ export const ScreenRecordingSidePanel = () => {
         await notifyParticipants({
           type: NotificationType.ScreenRecordingStarted,
         })
-        posthog.capture('screen-recording-started', {
+        captureEvent('screen-recording-started', {
           includeTranscript: includeTranscript,
           language: selectedLanguageKey,
         })
       }
     } catch (error) {
-      console.error('Failed to handle recording:', error)
+      reportError('generic_failure', error, {
+        context: 'Failed to handle recording:',
+      })
     }
   }
 

src/frontend/src/features/recording/components/TranscriptSidePanel.tsx

@@ -17,7 +17,6 @@ import {
   useNotifyParticipants,
   notifyRecordingSaveInProgress,
 } from '@/features/notifications'
-import posthog from 'posthog-js'
 import { useConfig } from '@/api/useConfig'
 import { VStack } from '@/styled-system/jsx'
 import { Checkbox } from '@/primitives/Checkbox.tsx'
@@ -35,6 +34,7 @@ import { useSidePanel } from '@/features/rooms/livekit/hooks/useSidePanel'
 import { useIsAdminOrOwner } from '@/features/rooms/livekit/hooks/useIsAdminOrOwner'
 import { LimitDescription } from './LimitDescription'
 import { openSettingsDialog } from '@/stores/settings'
+import { captureEvent, reportError } from '@/features/analytics/telemetry'
 
 export const TranscriptSidePanel = () => {
   const { data } = useConfig()
@@ -76,7 +76,7 @@ export const TranscriptSidePanel = () => {
     await notifyParticipants({
       type: NotificationType.TranscriptionRequested,
     })
-    posthog.capture('transcript-requested', {})
+    captureEvent('transcript-requested', {})
   }
 
   const handleTranscript = async () => {
@@ -121,13 +121,15 @@ export const TranscriptSidePanel = () => {
         await notifyParticipants({
           type: NotificationType.TranscriptionStarted,
         })
-        posthog.capture('transcript-started', {
+        captureEvent('transcript-started', {
           includeScreenRecording: includeScreenRecording,
           language: selectedLanguageKey,
         })
       }
     } catch (error) {
-      console.error('Failed to handle transcript:', error)
+      reportError('generic_failure', error, {
+        context: 'Failed to handle transcript:',
+      })
     }
   }
 

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

@@ -1,5 +1,6 @@
 import { useRoomInfo } from '@livekit/components-react'
 import { useMemo } from 'react'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const useRoomMetadata = () => {
   const { metadata } = useRoomInfo()
@@ -8,7 +9,9 @@ export const useRoomMetadata = () => {
       try {
         return JSON.parse(metadata)
       } catch (error) {
-        console.error('Failed to parse room metadata:', error)
+        reportError('generic_failure', error, {
+          context: 'Failed to parse room metadata:',
+        })
         return undefined
       }
     } else {

src/frontend/src/features/rooms/api/muteParticipant.ts

@@ -9,6 +9,7 @@ import { fetchApi } from '@/api/fetchApi'
 import { useIsAdminOrOwner } from '../livekit/hooks/useIsAdminOrOwner'
 
 import { useCallback } from 'react'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const useMuteParticipant = () => {
   const apiRoomData = useRoomData()
@@ -31,7 +32,10 @@ export const useMuteParticipant = () => {
 
       // Guard against undefined token for non-admin users
       if (!isAdminOrOwner && !apiRoomData.livekit.token) {
-        console.error('Cannot mute participant: missing auth token')
+        reportError(
+          'participant_mute_api_failure',
+          new Error('Cannot mute participant: missing auth token')
+        )
         return
       }
 
@@ -53,8 +57,11 @@ export const useMuteParticipant = () => {
           }
         )
       } catch (error) {
-        console.error(
-          `Failed to mute participant ${participant.identity}: ${error instanceof Error ? error.message : 'Unknown error'}`
+        reportError(
+          'participant_mute_api_failure',
+          new Error(
+            `Failed to mute participant ${participant.identity}: ${error instanceof Error ? error.message : 'Unknown error'}`
+          )
         )
         return
       }
@@ -65,8 +72,11 @@ export const useMuteParticipant = () => {
           destinationIdentities: [participant.identity],
         })
       } catch (e) {
-        console.error(
-          `Failed to notify muted participant ${participant.identity}: ${e}`
+        reportError(
+          'participant_mute_api_failure',
+          new Error(
+            `Failed to notify muted participant ${participant.identity}: ${e}`
+          )
         )
       }
 

src/frontend/src/features/rooms/api/muteParticipants.ts

@@ -1,5 +1,6 @@
 import type { Participant } from 'livekit-client'
 import { useMuteParticipant } from './muteParticipant'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const useMuteParticipants = () => {
   const { muteParticipant } = useMuteParticipant()
@@ -11,7 +12,9 @@ export const useMuteParticipants = () => {
       )
       return Promise.all(promises)
     } catch (error) {
-      console.error('An error occurred while muting participants :', error)
+      reportError('participant_mute_api_failure', error, {
+        context: 'An error occurred while muting participants :',
+      })
       throw new Error('An error occurred while muting participants.', {
         cause: error,
       })

src/frontend/src/features/rooms/api/updateParticipantPermissions.ts

@@ -1,6 +1,7 @@
 import type { Participant, Track } from 'livekit-client'
 import { fetchApi } from '@/api/fetchApi'
 import { useRoomData } from '@/features/rooms/livekit/hooks/useRoomData'
+import { reportError } from '@/features/analytics/telemetry'
 type Source = Track.Source
 
 export const useParticipantPermissions = () => {
@@ -32,8 +33,11 @@ export const useParticipantPermissions = () => {
         }),
       })
     } catch (error) {
-      console.error(
-        `Failed to update participant's permissions ${participant.identity}: ${error instanceof Error ? error.message : 'Unknown error'}`
+      reportError(
+        'permissions_api_failure',
+        new Error(
+          `Failed to update participant's permissions ${participant.identity}: ${error instanceof Error ? error.message : 'Unknown error'}`
+        )
       )
     }
   }

src/frontend/src/features/rooms/api/updateParticipantsPermissions.ts

@@ -1,5 +1,6 @@
 import type { Participant, Track } from 'livekit-client'
 import { useParticipantPermissions } from './updateParticipantPermissions'
+import { reportError } from '@/features/analytics/telemetry'
 type Source = Track.Source
 
 export const useUpdateParticipantsPermissions = () => {
@@ -15,7 +16,9 @@ export const useUpdateParticipantsPermissions = () => {
       )
       return Promise.all(promises)
     } catch (error) {
-      console.error('An error occurred while updating permissions :', error)
+      reportError('permissions_api_failure', error, {
+        context: 'An error occurred while updating permissions :',
+      })
       throw new Error('An error occurred while updating permissions.', {
         cause: error,
       })

src/frontend/src/features/rooms/components/Conference.tsx

@@ -26,7 +26,11 @@ import { css } from '@/styled-system/css'
 import { BackgroundProcessorFactory } from '../livekit/components/blur'
 import { LocalUserChoices } from '@/stores/userChoices'
 import { MediaDeviceErrorAlert } from './MediaDeviceErrorAlert'
-import { usePostHog } from 'posthog-js/react'
+import {
+  captureEvent,
+  reportError,
+  captureMediaEvent,
+} from '@/features/analytics/telemetry'
 import { useConfig } from '@/api/useConfig'
 import { isFireFox } from '@/utils/livekit'
 import { useIsMobile } from '@/utils/useIsMobile'
@@ -37,6 +41,10 @@ import { notifyAutoMutedOnJoin } from '@/features/notifications/utils'
 import { useSnapshot } from 'valtio'
 import { userPreferencesStore } from '@/stores/userPreferences'
 import { userStore } from '@/stores/user'
+import {
+  PERMISSION_BY_DEVICE_KIND,
+  notePermissionDeniedFromGum,
+} from '@/stores/permissions'
 
 export const Conference = ({
   roomId,
@@ -47,7 +55,6 @@ export const Conference = ({
   mode?: 'join' | 'create'
   initialRoomData?: ApiRoom
 }) => {
-  const posthog = usePostHog()
   const { data: apiConfig } = useConfig()
 
   const { userChoices: userConfig } = usePersistentUserChoices() as {
@@ -57,8 +64,8 @@ export const Conference = ({
   const { username } = useSnapshot(userStore)
 
   useEffect(() => {
-    posthog.capture('visit-room', { slug: roomId })
-  }, [roomId, posthog])
+    captureEvent('visit-room', { slug: roomId })
+  }, [roomId])
   const fetchKey = [keys.room, roomId]
 
   const [isConnectionWarmedUp, setIsConnectionWarmedUp] = useState(false)
@@ -235,7 +242,10 @@ export const Conference = ({
             backgroundColor: 'primaryDark.50 !important',
           })}
           onError={(e) => {
-            posthog.captureException(e)
+            reportError('livekit_room_error', e, {
+              path: 'connect_publish',
+              failure: MediaDeviceFailure.getFailure(e) ?? 'not-a-device-error',
+            })
           }}
           onConnected={async () => {
             if (!apiConfig) return
@@ -296,8 +306,22 @@ export const Conference = ({
             }
           }}
           onMediaDeviceFailure={(e, kind) => {
-            if (e == MediaDeviceFailure.DeviceInUse && !!kind) {
-              setMediaDeviceError({ error: e, kind })
+            if (!e || !kind) return
+            void captureMediaEvent('media-device-error', {
+              log_code: 'media_devices_error_event',
+              path: 'connect_publish',
+              failure: e,
+              kind,
+            })
+            switch (e) {
+              case MediaDeviceFailure.DeviceInUse:
+                setMediaDeviceError({ error: e, kind })
+                break
+              case MediaDeviceFailure.PermissionDenied:
+                notePermissionDeniedFromGum(PERMISSION_BY_DEVICE_KIND[kind])
+                break
+              default:
+                break
             }
           }}
         >

src/frontend/src/features/rooms/components/InviteDialog.tsx

@@ -45,7 +45,7 @@ export const InviteDialog = ({ mode }: { mode: 'join' | 'create' }) => {
   const { t } = useTranslation('rooms', { keyPrefix: 'shareDialog' })
 
   const roomData = useRoomData()
-  const roomUrl = getRouteUrl('room', roomData?.slug)
+  const roomUrl = roomData?.slug ? getRouteUrl('room', roomData.slug) : ''
 
   const telephony = useTelephony()
 

src/frontend/src/features/rooms/components/Lobby.tsx

@@ -0,0 +1,167 @@
+import { useEffect } from 'react'
+import { useTranslation } from 'react-i18next'
+import { useQuery } from '@tanstack/react-query'
+import { useSnapshot } from 'valtio'
+import { css } from '@/styled-system/css'
+import { VStack } from '@/styled-system/jsx'
+import { H } from '@/primitives/H'
+import { Field } from '@/primitives/Field'
+import { Form, Text } from '@/primitives'
+import { Spinner } from '@/primitives/Spinner'
+import { keys } from '@/api/queryKeys'
+import { queryClient } from '@/api/queryClient'
+import { useLoginHint } from '@/hooks/useLoginHint'
+import { useUser } from '@/features/auth/api/useUser'
+import { useConfig } from '@/api/useConfig'
+import { saveUsername, userStore } from '@/stores/user'
+import { fetchRoom } from '../api/fetchRoom'
+import { ApiAccessLevel } from '../api/ApiRoom'
+import { ApiLobbyStatus, type ApiRequestEntry } from '../api/requestEntry'
+import { useLobby } from '../hooks/useLobby'
+
+export const Lobby = ({
+  roomId,
+  enterRoom,
+}: {
+  roomId: string
+  enterRoom: () => void
+}) => {
+  const { t } = useTranslation('rooms', { keyPrefix: 'join' })
+
+  const { data: configData } = useConfig()
+  const { isLoggedIn, user } = useUser()
+  const { username } = useSnapshot(userStore)
+
+  // Room data strategy:
+  // 1. Initial fetch is performed to check access and get LiveKit configuration
+  // 2. Data remains valid for 6 hours to avoid unnecessary refetches
+  // 3. State is manually updated via queryClient when a waiting participant is accepted
+  // 4. No automatic refetching or revalidation occurs during this period
+  const {
+    data: roomData,
+    error,
+    isError,
+    refetch: refetchRoom,
+  } = useQuery({
+    queryKey: [keys.room, roomId],
+    queryFn: () => fetchRoom({ roomId, username: username || user?.full_name }),
+    staleTime: 6 * 60 * 60 * 1000, // By default, LiveKit access tokens expire 6 hours after generation
+    retry: false,
+    enabled: false,
+  })
+
+  useEffect(() => {
+    if (isError && error?.statusCode == 404) {
+      // The room component will handle the room creation if the user is authenticated
+      enterRoom()
+    }
+  }, [isError, error, enterRoom])
+
+  const handleAccepted = (response: ApiRequestEntry) => {
+    queryClient.setQueryData([keys.room, roomId], {
+      ...roomData,
+      livekit: response.livekit,
+    })
+    enterRoom()
+  }
+
+  const { status, startWaiting } = useLobby({
+    roomId,
+    username: username || user?.full_name || 'anonymous',
+    onAccepted: handleAccepted,
+  })
+
+  const { openLoginHint } = useLoginHint()
+
+  const handleSubmit = async () => {
+    const { data } = await refetchRoom()
+
+    if (!data?.livekit) {
+      // Display a message to inform the user that by logging in, they won't have to wait for room entry approval.
+      if (data?.access_level == ApiAccessLevel.TRUSTED) {
+        openLoginHint()
+      }
+      startWaiting()
+      return
+    }
+
+    enterRoom()
+  }
+
+  switch (status) {
+    case ApiLobbyStatus.TIMEOUT:
+      return (
+        <VStack alignItems="center" textAlign="center">
+          <H lvl={1} margin={false} centered>
+            {t('timeoutInvite.title')}
+          </H>
+          <Text as="p" variant="note">
+            {t('timeoutInvite.body')}
+          </Text>
+        </VStack>
+      )
+
+    case ApiLobbyStatus.DENIED:
+      return (
+        <VStack alignItems="center" textAlign="center">
+          <H lvl={1} margin={false} centered>
+            {t('denied.title')}
+          </H>
+          <Text as="p" variant="note">
+            {t('denied.body')}
+          </Text>
+        </VStack>
+      )
+
+    case ApiLobbyStatus.WAITING:
+      return (
+        <VStack alignItems="center" textAlign="center">
+          <H lvl={1} margin={false} centered>
+            {t('waiting.title')}
+          </H>
+          <Text
+            as="p"
+            variant="note"
+            className={css({ marginBottom: '1.5rem' })}
+          >
+            {t('waiting.body')}
+          </Text>
+          <Spinner />
+        </VStack>
+      )
+
+    default:
+      return (
+        <Form
+          onSubmit={handleSubmit}
+          submitLabel={t('joinLabel')}
+          submitButtonProps={{
+            fullWidth: true,
+          }}
+        >
+          <VStack marginBottom={1}>
+            <H lvl={1} margin="sm" centered>
+              {t('heading')}
+            </H>
+            {(!isLoggedIn ||
+              configData?.authenticated_users_can_edit_display_name) && (
+              <Field
+                type="text"
+                onChange={saveUsername}
+                label={t('usernameLabel')}
+                id="input-name"
+                defaultValue={username || user?.full_name}
+                validate={(value) => !value && t('errors.usernameEmpty')}
+                wrapperProps={{
+                  noMargin: true,
+                  fullWidth: true,
+                }}
+                autoComplete="name"
+                maxLength={50}
+              />
+            )}
+          </VStack>
+        </Form>
+      )
+  }
+}

src/frontend/src/features/rooms/components/Rating.tsx

@@ -1,13 +1,12 @@
-import { Button, H, Input, Text, TextArea } from '@/primitives'
+import { Button, H, Text, TextArea } from '@/primitives'
 import { useEffect, useMemo, useState } from 'react'
 import { cva } from '@/styled-system/css'
 import { useTranslation } from 'react-i18next'
 import { styled, VStack } from '@/styled-system/jsx'
-import { usePostHog } from 'posthog-js/react'
-import type { PostHog } from 'posthog-js'
 import { Button as RACButton } from 'react-aria-components'
 import { useIsAnalyticsEnabled } from '@/features/analytics/hooks/useIsAnalyticsEnabled'
 import type { CandidateInfo } from '@/stores/connectionObserver'
+import { captureEvent } from '@/features/analytics/telemetry'
 
 const Card = styled('div', {
   base: {
@@ -72,11 +71,9 @@ const labelRecipe = cva({
 })
 
 const OpenFeedback = ({
-  posthog,
   onNext,
   metadata,
 }: {
-  posthog: PostHog
   onNext: () => void
   metadata?: Record<string, unknown>
 }) => {
@@ -90,7 +87,7 @@ const OpenFeedback = ({
 
   const onSubmit = () => {
     try {
-      posthog.capture('open-feedback', {
+      captureEvent('open-feedback', {
         feedback,
         ...metadata,
       })
@@ -141,12 +138,10 @@ const OpenFeedback = ({
 }
 
 const RateQuality = ({
-  posthog,
   onNext,
   metadata,
   maxRating = 5,
 }: {
-  posthog: PostHog
   onNext: () => void
   metadata?: Record<string, unknown>
   maxRating?: number
@@ -160,7 +155,7 @@ const RateQuality = ({
 
   const onSubmit = () => {
     try {
-      posthog.capture('quality-rating', {
+      captureEvent('quality-rating', {
         rating: selectedRating,
         ...metadata,
       })
@@ -243,67 +238,6 @@ const ConfirmationMessage = ({ onNext }: { onNext: () => void }) => {
   )
 }
 
-const AuthenticationMessage = ({
-  onNext,
-  posthog,
-}: {
-  onNext: () => void
-  posthog: PostHog
-}) => {
-  const { t } = useTranslation('rooms', { keyPrefix: 'authenticationMessage' })
-
-  const [email, setEmail] = useState('')
-
-  const onSubmit = () => {
-    posthog.people.set({ unsafe_email: email })
-    onNext()
-  }
-
-  return (
-    <Card
-      style={{
-        maxWidth: '380px',
-        display: 'flex',
-        flexDirection: 'column',
-        justifyContent: 'center',
-      }}
-    >
-      <H lvl={3}>{t('heading')}</H>
-      <Input
-        id="emailInput"
-        name="email"
-        placeholder={t('placeholder')}
-        required
-        value={email}
-        onChange={(e) => setEmail(e.target.value)}
-        style={{
-          marginBottom: '1rem',
-        }}
-      />
-      <VStack gap="0.5">
-        <Button
-          variant="primary"
-          size="sm"
-          fullWidth
-          isDisabled={!email}
-          onPress={onSubmit}
-        >
-          {t('submit')}
-        </Button>
-        <Button
-          invisible
-          variant="secondary"
-          size="sm"
-          fullWidth
-          onPress={onNext}
-        >
-          {t('ignore')}
-        </Button>
-      </VStack>
-    </Card>
-  )
-}
-
 type RatingMetadata = {
   room_id?: string
   pc_publisher?: CandidateInfo
@@ -318,12 +252,6 @@ export const Rating = ({
   metadata: RatingMetadata
 }) => {
   const isAnalyticsEnabled = useIsAnalyticsEnabled()
-  const posthog = usePostHog()
-
-  const isUserAnonymous = useMemo(() => {
-    return posthog.get_property('$user_state') == 'anonymous'
-  }, [posthog])
-
   const [step, setStep] = useState(0)
 
   const sessionId = useMemo(() => crypto.randomUUID(), [])
@@ -339,37 +267,14 @@ export const Rating = ({
   if (!isAnalyticsEnabled) return
 
   if (step == 0) {
-    return (
-      <RateQuality
-        posthog={posthog}
-        onNext={() => setStep(step + 1)}
-        metadata={metadata}
-      />
-    )
+    return <RateQuality onNext={() => setStep(step + 1)} metadata={metadata} />
   }
 
   if (step == 1) {
-    return (
-      <OpenFeedback
-        posthog={posthog}
-        onNext={() => setStep(step + 1)}
-        metadata={metadata}
-      />
-    )
+    return <OpenFeedback onNext={() => setStep(step + 1)} metadata={metadata} />
   }
 
   if (step == 2) {
-    return isUserAnonymous ? (
-      <AuthenticationMessage
-        posthog={posthog}
-        onNext={() => setStep(step + 1)}
-      />
-    ) : (
-      <ConfirmationMessage onNext={() => setStep(0)} />
-    )
-  }
-
-  if (step == 3) {
     return <ConfirmationMessage onNext={() => setStep(0)} />
   }
 }

src/frontend/src/features/rooms/hooks/useWatchPermissions.ts

@@ -1,160 +1,36 @@
 import { useEffect } from 'react'
-import { permissionsStore } from '@/stores/permissions'
-import { isSafari } from '@/utils/livekit'
-
-const POLLING_TIME = 500
+import { syncPermissions } from '@/stores/permissions'
 
 export const useWatchPermissions = () => {
   useEffect(() => {
-    let cleanup: (() => void) | undefined
-    let intervalId: ReturnType<typeof setTimeout> | undefined
-    let isCancelled = false
+    const sync = () => void syncPermissions()
+    sync()
 
-    const checkPermissions = async () => {
-      try {
-        if (!navigator.permissions) {
-          if (!isCancelled) {
-            permissionsStore.cameraPermission = 'unavailable'
-            permissionsStore.microphonePermission = 'unavailable'
-          }
-          return
-        }
+    navigator.mediaDevices?.addEventListener?.('devicechange', sync)
+    window.addEventListener('focus', sync)
 
-        const [cameraPermission, microphonePermission] = await Promise.all([
-          navigator.permissions.query({ name: 'camera' }),
-          navigator.permissions.query({ name: 'microphone' }),
-        ])
-
-        if (isCancelled) return
-
-        /**
-         * Safari Permission API Limitation Workaround
-         *
-         * Safari has a known issue where permission change events are not reliably fired
-         * when users interact with permission prompts. This is documented in Apple's forums:
-         * https://developer.apple.com/forums/thread/757353
-         *
-         * The problem:
-         * - When permissions are in 'prompt' state, Safari may not trigger 'change' events
-         * - Users can grant/deny permissions through system prompts, but our listeners won't detect it
-         * - This leaves the UI in an inconsistent state showing outdated permission status
-         *
-         * The solution:
-         * - Manually poll the Permissions API every 500ms when either permission is in 'prompt' state
-         * - Continue polling until both permissions are no longer in 'prompt' state
-         * - This ensures we catch permission changes even when Safari fails to fire events
-         *
-         * This polling is Safari-specific and only activates when needed to minimize performance impact.
-         */
-        if (
-          isSafari() &&
-          (cameraPermission.state === 'prompt' ||
-            microphonePermission.state === 'prompt')
-        ) {
-          // Start polling every 1 second if either permission is in 'prompt' state
-          if (!intervalId) {
-            intervalId = setInterval(async () => {
-              try {
-                const [updatedCamera, updatedMicrophone] = await Promise.all([
-                  navigator.permissions.query({ name: 'camera' }),
-                  navigator.permissions.query({ name: 'microphone' }),
-                ])
-
-                if (isCancelled) return
-
-                const cameraChanged =
-                  permissionsStore.cameraPermission !== updatedCamera.state
-                const microphoneChanged =
-                  permissionsStore.microphonePermission !==
-                  updatedMicrophone.state
-
-                if (cameraChanged) {
-                  permissionsStore.cameraPermission = updatedCamera.state
-                }
-
-                if (microphoneChanged) {
-                  permissionsStore.microphonePermission =
-                    updatedMicrophone.state
-                }
-
-                if (
-                  updatedCamera.state !== 'prompt' &&
-                  updatedMicrophone.state !== 'prompt'
-                ) {
-                  if (intervalId) {
-                    clearInterval(intervalId)
-                    intervalId = undefined
-                  }
-                }
-              } catch (error) {
-                if (!isCancelled) {
-                  console.error('Error polling permissions:', error)
-                }
-              }
-            }, POLLING_TIME)
-          }
-        }
-
-        permissionsStore.cameraPermission = cameraPermission.state
-        permissionsStore.microphonePermission = microphonePermission.state
-
-        const handleCameraChange = (e: Event) => {
-          const target = e.target as PermissionStatus
-          permissionsStore.cameraPermission = target.state
-
-          if (
-            intervalId &&
-            target.state !== 'prompt' &&
-            microphonePermission.state !== 'prompt'
-          ) {
-            clearInterval(intervalId)
-            intervalId = undefined
-          }
-        }
-
-        const handleMicrophoneChange = (e: Event) => {
-          const target = e.target as PermissionStatus
-          permissionsStore.microphonePermission = target.state
-
-          if (
-            intervalId &&
-            target.state !== 'prompt' &&
-            microphonePermission.state !== 'prompt'
-          ) {
-            clearInterval(intervalId)
-            intervalId = undefined
-          }
-        }
-
-        cameraPermission.addEventListener('change', handleCameraChange)
-        microphonePermission.addEventListener('change', handleMicrophoneChange)
-
-        cleanup = () => {
-          cameraPermission.removeEventListener('change', handleCameraChange)
-          microphonePermission.removeEventListener(
-            'change',
-            handleMicrophoneChange
-          )
-          if (intervalId) {
-            clearInterval(intervalId)
-            intervalId = undefined
-          }
-        }
-      } catch (error) {
-        if (!isCancelled) {
-          console.error('Error checking permissions:', error)
-        }
-      } finally {
-        if (!isCancelled) {
-          permissionsStore.isLoading = false
-        }
-      }
+    let statuses: PermissionStatus[] = []
+    let cancelled = false
+    if (navigator.permissions) {
+      Promise.all([
+        navigator.permissions.query({ name: 'camera' as PermissionName }),
+        navigator.permissions.query({ name: 'microphone' as PermissionName }),
+      ])
+        .then((results) => {
+          if (cancelled) return
+          statuses = results
+          statuses.forEach((s) => s.addEventListener('change', sync))
+        })
+        .catch(() => {
+          // Query unsupported: devicechange/focus + gUM outcomes cover it.
+        })
     }
-    checkPermissions()
 
     return () => {
-      isCancelled = true
-      cleanup?.()
+      cancelled = true
+      navigator.mediaDevices?.removeEventListener?.('devicechange', sync)
+      window.removeEventListener('focus', sync)
+      statuses.forEach((s) => s.removeEventListener('change', sync))
     }
   }, [])
 }

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

@@ -13,6 +13,7 @@ import { usePermissionsManager } from '../hooks/usePermissionsManager'
 import { useEffect } from 'react'
 import { closeSidePanel } from '@/stores/layout'
 import { useIsAdminOrOwner } from '../hooks/useIsAdminOrOwner'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const Admin = () => {
   const { t } = useTranslation('rooms', { keyPrefix: 'admin' })
@@ -205,7 +206,7 @@ export const Admin = () => {
             patchRoom({
               roomId,
               room: { access_level: value as ApiAccessLevel },
-            }).catch((e) => console.error(e))
+            }).catch((e) => reportError('generic_failure', e))
           }
           items={[
             {

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

@@ -11,10 +11,10 @@ import { DisconnectReason, RoomEvent } from 'livekit-client'
 import { userPreferencesStore } from '@/stores/userPreferences'
 import { connectionObserverStore } from '@/stores/connectionObserver'
 
-import posthog from 'posthog-js'
 import { useFeatureFlagEnabled } from 'posthog-js/react'
 import { isMobileBrowser } from '@livekit/components-core'
 import { FeatureFlags } from '@/features/analytics/enums'
+import { captureEvent } from '@/features/analytics/telemetry'
 
 const CANDIDATE_POLL_INTERVAL_MS = 5000
 
@@ -182,23 +182,23 @@ export const ConnectionObserver = () => {
       // total session duration from first connect to final disconnect.
       if (connectionStartTimeRef.current != null) return
       connectionStartTimeRef.current = Date.now()
-      posthog.capture('connection-event')
+      captureEvent('connection-event')
     }
 
     const handleReconnect = () => {
-      posthog.capture('reconnect-event')
+      captureEvent('reconnect-event')
     }
 
     const handleReconnected = () => {
-      posthog.capture('reconnected-event')
+      captureEvent('reconnected-event')
     }
 
     const handleSignalingConnect = () => {
-      posthog.capture('signaling-connect-event')
+      captureEvent('signaling-connect-event')
     }
 
     const handleSignalingReconnect = () => {
-      posthog.capture('signaling-reconnect-event')
+      captureEvent('signaling-reconnect-event')
     }
 
     const handleDisconnect = (
@@ -206,7 +206,7 @@ export const ConnectionObserver = () => {
     ) => {
       const connectionEndTime = Date.now()
 
-      posthog.capture('disconnect-event', {
+      captureEvent('disconnect-event', {
         // Calculate total session duration from first connection to final disconnect
         // This duration is sensitive to refreshing the page.
         sessionDuration: connectionStartTimeRef.current

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

@@ -14,7 +14,7 @@ export const Info = () => {
   const { t } = useTranslation('rooms', { keyPrefix: 'info' })
 
   const data = useRoomData()
-  const roomUrl = getRouteUrl('room', data?.slug)
+  const roomUrl = data?.slug ? getRouteUrl('room', data.slug) : ''
 
   const telephony = useTelephony()
 

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

@@ -0,0 +1,20 @@
+import { useLocalParticipant } from '@livekit/components-react'
+import type { LocalTrack } from 'livekit-client'
+import { useSyncTrackDeviceId } from '../hooks/useSyncTrackDeviceId'
+import {
+  saveAudioInputDeviceId,
+  saveVideoInputDeviceId,
+} from '@/stores/userChoices'
+
+export const SyncDevicePreferences = () => {
+  const { cameraTrack, microphoneTrack } = useLocalParticipant()
+  useSyncTrackDeviceId(
+    cameraTrack?.track as LocalTrack | undefined,
+    saveVideoInputDeviceId
+  )
+  useSyncTrackDeviceId(
+    microphoneTrack?.track as LocalTrack | undefined,
+    saveAudioInputDeviceId
+  )
+  return null
+}

src/frontend/src/features/rooms/livekit/components/blur/BackgroundCustomProcessor.ts

@@ -1,5 +1,4 @@
 import type { ProcessorOptions, Track } from 'livekit-client'
-import posthog from 'posthog-js'
 import {
   FilesetResolver,
   ImageSegmenter,
@@ -18,6 +17,7 @@ import {
   type ProcessorType,
   MEDIAPIPE_PATH_WASM,
 } from '.'
+import { captureEvent } from '@/features/analytics/telemetry.ts'
 
 const PROCESSING_WIDTH = 256
 const PROCESSING_HEIGHT = 144
@@ -100,7 +100,7 @@ export class BackgroundCustomProcessor implements BackgroundProcessorInterface {
     await this.initSegmenter()
     this._initWorker()
 
-    posthog.capture('firefox-blurring-init')
+    captureEvent('firefox-blurring-init', {})
   }
 
   _initVirtualBackgroundImage() {

src/frontend/src/features/rooms/livekit/components/blur/FaceLandmarksProcessor.ts

@@ -1,5 +1,4 @@
 import type { ProcessorOptions, Track, TrackProcessor } from 'livekit-client'
-import posthog from 'posthog-js'
 import {
   FilesetResolver,
   FaceLandmarker,
@@ -16,6 +15,7 @@ import {
   ProcessorType,
   MEDIAPIPE_PATH_WASM,
 } from '.'
+import { captureEvent } from '@/features/analytics/telemetry'
 
 const PROCESSING_WIDTH = 256 * 3
 const PROCESSING_HEIGHT = 144 * 3
@@ -101,7 +101,7 @@ export class FaceLandmarksProcessor implements TrackProcessor<Track.Kind> {
     await this.initFaceLandmarker()
     this._initWorker()
 
-    posthog.capture('face-landmarks-init')
+    captureEvent('face-landmarks-init', {})
   }
 
   _initWorker() {

src/frontend/src/features/rooms/livekit/components/blur/index.ts

@@ -1,4 +1,7 @@
-import { ProcessorWrapper } from '@livekit/track-processors'
+import {
+  ProcessorWrapper,
+  supportsBackgroundProcessors,
+} from '@livekit/track-processors'
 import type { Track, TrackProcessor } from 'livekit-client'
 import { BackgroundCustomProcessor } from './BackgroundCustomProcessor'
 import { UnifiedBackgroundTrackProcessor } from './UnifiedBackgroundTrackProcessor'
@@ -34,7 +37,9 @@ export class BackgroundProcessorFactory {
   }
 
   static isSupported() {
-    return ProcessorWrapper.isSupported || BackgroundCustomProcessor.isSupported
+    return (
+      supportsBackgroundProcessors() || BackgroundCustomProcessor.isSupported
+    )
   }
 
   static getProcessor(
@@ -45,7 +50,7 @@ export class BackgroundProcessorFactory {
 
     if (!isBlur && !isVirtual) return undefined
 
-    if (ProcessorWrapper.isSupported) {
+    if (supportsBackgroundProcessors()) {
       return new UnifiedBackgroundTrackProcessor(config)
     }
 

src/frontend/src/features/rooms/livekit/components/controls/CameraSwitchButton.tsx

@@ -4,6 +4,7 @@ import { RiCameraSwitchLine } from '@remixicon/react'
 import { useEffect, useState } from 'react'
 import type { ButtonProps } from 'react-aria-components'
 import { useTranslation } from 'react-i18next'
+import { reportError } from '@/features/analytics/telemetry'
 
 enum FacingMode {
   USER = 'user',
@@ -103,7 +104,11 @@ export const CameraSwitchButton = (props: Partial<ButtonProps>) => {
       setActiveMediaDevice(device.deviceId)
       setFacingMode(target)
     } else {
-      console.error('Cannot get user device with facingMode ' + target)
+      reportError(
+        'device_switch_failure',
+        new Error('Cannot get user device with facingMode ' + target),
+        { path: 'switch_device', kind: 'videoinput', facing_mode: target }
+      )
     }
   }
   return (

src/frontend/src/features/rooms/livekit/components/controls/Device/AudioDevicesControl.tsx

@@ -1,8 +1,12 @@
 import { useTranslation } from 'react-i18next'
-import { useTrackToggle, UseTrackToggleProps } from '@livekit/components-react'
+import {
+  useLocalParticipant,
+  useTrackToggle,
+  UseTrackToggleProps,
+} from '@livekit/components-react'
 import { Button, Popover } from '@/primitives'
 import { RiArrowUpSLine } from '@remixicon/react'
-import { Track } from 'livekit-client'
+import { LocalAudioTrack, Track } from 'livekit-client'
 
 import { ToggleDevice } from './ToggleDevice'
 import { css } from '@/styled-system/css'
@@ -51,6 +55,12 @@ export const AudioDevicesControl = ({
     ...props,
   })
 
+  const { microphoneTrack } = useLocalParticipant()
+  const localAudioTrack =
+    microphoneTrack?.track instanceof LocalAudioTrack
+      ? microphoneTrack.track
+      : undefined
+
   const kind = 'audioinput'
   const cannotUseDevice = useCannotUseDevice(kind)
   const selectLabel = t(`settings.${SettingsDialogExtendedKey.AUDIO}`)
@@ -111,6 +121,7 @@ export const AudioDevicesControl = ({
                   context="room"
                   kind={kind}
                   id={audioDeviceId}
+                  track={localAudioTrack}
                   onSubmit={saveAudioInputDeviceId}
                 />
               </div>

src/frontend/src/features/rooms/livekit/components/controls/Device/AudioLevelGauge.tsx

@@ -0,0 +1,154 @@
+import { useEffect, useState } from 'react'
+import { LocalAudioTrack, TrackEvent } from 'livekit-client'
+import { useTrackVolume } from '@livekit/components-react'
+import { useTranslation } from 'react-i18next'
+import { RiMicLine, RiMicOffLine } from '@remixicon/react'
+import { styled } from '@/styled-system/jsx'
+import { Text } from '@/primitives'
+
+const StyledContainer = styled('div', {
+  base: {
+    display: 'flex',
+    alignItems: 'center',
+    gap: '0.75rem',
+    padding: '0.625rem 0.75rem',
+    marginTop: '0.25rem',
+    borderTop: '1px solid',
+    minHeight: '2.5rem',
+  },
+  variants: {
+    theme: {
+      light: {
+        borderColor: 'greyscale.250',
+        color: 'greyscale.600',
+      },
+      dark: {
+        borderColor: 'rgba(255 255 255 / 0.2)',
+        color: 'rgba(255 255 255 / 0.7)',
+      },
+    },
+  },
+})
+
+const StyledGaugeContainer = styled('div', {
+  base: {
+    flexGrow: 1,
+    height: '0.375rem',
+    borderRadius: '0.1875rem',
+    overflow: 'hidden',
+  },
+  variants: {
+    theme: {
+      light: {
+        backgroundColor: 'greyscale.250',
+      },
+      dark: {
+        backgroundColor: 'rgba(255 255 255 / 0.25)',
+      },
+    },
+  },
+})
+
+const StyledGauge = styled('div', {
+  base: {
+    width: '100%',
+    height: '100%',
+    borderRadius: 'inherit',
+    transformOrigin: 'left center',
+    transform: 'scaleX(0)',
+    transition: 'transform 0.06s linear',
+  },
+  variants: {
+    theme: {
+      light: {
+        backgroundColor: 'primary.500',
+      },
+      dark: {
+        backgroundColor: 'primaryDark.800',
+      },
+    },
+  },
+})
+
+type Theme = 'light' | 'dark'
+
+type AudioLevelGaugeProps = {
+  track?: LocalAudioTrack
+  variant?: Theme
+}
+
+const useIsTrackMuted = (track?: LocalAudioTrack) => {
+  const [isMuted, setIsMuted] = useState(() => track?.isMuted ?? true)
+
+  useEffect(() => {
+    if (!track) {
+      setIsMuted(true)
+      return
+    }
+    setIsMuted(track.isMuted)
+    const onMuted = () => setIsMuted(true)
+    const onUnmuted = () => setIsMuted(false)
+    track.on(TrackEvent.Muted, onMuted)
+    track.on(TrackEvent.Unmuted, onUnmuted)
+    return () => {
+      track.off(TrackEvent.Muted, onMuted)
+      track.off(TrackEvent.Unmuted, onUnmuted)
+    }
+  }, [track])
+
+  return isMuted
+}
+
+const LevelBar = ({
+  track,
+  theme,
+}: {
+  track: LocalAudioTrack
+  theme: Theme
+}) => {
+  const { t } = useTranslation('rooms', { keyPrefix: 'selectDevice' })
+  const volume = useTrackVolume(track, {
+    fftSize: 256,
+    smoothingTimeConstant: 0.7,
+  })
+  const level = Math.min(1, volume)
+
+  return (
+    <>
+      <RiMicLine size={18} aria-hidden="true" />
+      <StyledGaugeContainer
+        theme={theme}
+        role="img"
+        aria-label={t('audioinput.level')}
+      >
+        <StyledGauge theme={theme} style={{ transform: `scaleX(${level})` }} />
+      </StyledGaugeContainer>
+    </>
+  )
+}
+
+export const AudioLevelGauge = ({
+  track,
+  variant = 'light',
+}: AudioLevelGaugeProps) => {
+  const { t } = useTranslation('rooms', { keyPrefix: 'selectDevice' })
+  const isMuted = useIsTrackMuted(track)
+  const showMutedHint = !track || isMuted
+
+  return (
+    <StyledContainer theme={variant}>
+      {showMutedHint ? (
+        <>
+          <RiMicOffLine size={18} aria-hidden="true" />
+          <Text variant="sm">{t('audioinput.muteTest')}</Text>
+        </>
+      ) : (
+        <LevelBar
+          key={track.mediaStreamTrack?.id}
+          track={track}
+          theme={variant}
+        />
+      )}
+    </StyledContainer>
+  )
+}

src/frontend/src/features/rooms/livekit/components/controls/Device/OutputSoundTester.tsx

@@ -0,0 +1,89 @@
+import { useEffect, useRef, useState } from 'react'
+import { useTranslation } from 'react-i18next'
+import { RiVolumeUpLine } from '@remixicon/react'
+import { styled } from '@/styled-system/jsx'
+import { Button } from '@/primitives'
+import { reportError } from '@/features/analytics/telemetry'
+import { canTestAudioOutput } from '@/features/rooms/utils/canTestAudioOutput'
+
+// Speaker test in the audiooutput menu footer (Meet-style UX). Outputs have
+// no track: the test plays a bundled file through the selected sink, and
+// following `sinkId` mid-playback re-routes it live. No permission involved.
+
+type Theme = 'light' | 'dark'
+
+const BUTTON_VARIANT = {
+  light: 'quaternaryText',
+  dark: 'primaryTextDark',
+} as const
+
+const StyledContainer = styled('div', {
+  base: {
+    display: 'flex',
+    alignItems: 'center',
+    gap: '0.5rem',
+    paddingTop: '0.5rem',
+    borderTop: '1px solid',
+  },
+  variants: {
+    theme: {
+      light: {
+        borderColor: 'gray.200',
+      },
+      dark: {
+        borderColor: 'primaryDark.300',
+      },
+    },
+  },
+})
+
+type OutputSoundTesterProps = {
+  /** The device the test should play through (the select's current key). */
+  sinkId?: string
+  variant?: Theme
+}
+
+export const OutputSoundTester = ({
+  sinkId,
+  variant = 'light',
+}: OutputSoundTesterProps) => {
+  const { t } = useTranslation('rooms', { keyPrefix: 'selectDevice' })
+  const audioRef = useRef<HTMLAudioElement>(null)
+  const [isPlaying, setIsPlaying] = useState(false)
+
+  useEffect(() => {
+    if (!sinkId || !canTestAudioOutput()) return
+    audioRef.current?.setSinkId(sinkId).catch((error) => {
+      reportError('device_switch_failure', error, {
+        kind: 'audiooutput',
+        context: 'test sound setSinkId',
+      })
+    })
+  }, [sinkId])
+
+  return (
+    <StyledContainer theme={variant}>
+      <Button
+        variant={BUTTON_VARIANT[variant]}
+        size="sm"
+        fullWidth
+        isDisabled={isPlaying}
+        onPress={() => {
+          audioRef.current
+            ?.play()
+            .then(() => setIsPlaying(true))
+            .catch(() => {})
+        }}
+      >
+        <RiVolumeUpLine size={18} aria-hidden />
+        {isPlaying ? t('audiooutput.testing') : t('audiooutput.test')}
+      </Button>
+      {/* eslint-disable-next-line jsx-a11y/media-has-caption */}
+      <audio
+        ref={audioRef}
+        src="sounds/uprise.mp3"
+        onEnded={() => setIsPlaying(false)}
+      />
+    </StyledContainer>
+  )
+}

src/frontend/src/features/rooms/livekit/components/controls/Device/SelectDevice.tsx

@@ -5,6 +5,10 @@ import { Select, SelectProps } from '@/primitives/Select'
 import type { Placement } from '@react-types/overlays'
 import { useCannotUseDevice } from '../../../hooks/useCannotUseDevice'
 import { useDeviceIcons } from '@/features/rooms/livekit/hooks/useDeviceIcons'
+import type { LocalAudioTrack } from 'livekit-client'
+import { AudioLevelGauge } from './AudioLevelGauge'
+import { OutputSoundTester } from './OutputSoundTester'
+import { canTestAudioOutput } from '@/features/rooms/utils/canTestAudioOutput'
 
 type DeviceItems = Array<{ value: string; label: string }>
 
@@ -18,6 +22,7 @@ type SelectDeviceProps = {
   onSubmit?: (id: string) => void
   kind: MediaDeviceKind
   context?: 'join' | 'room'
+  track?: LocalAudioTrack
 }
 
 type SelectDevicePermissionsProps<T> = SelectDeviceProps &
@@ -28,6 +33,7 @@ const SelectDevicePermissions = <T extends string | number>({
   kind,
   onSubmit,
   iconComponent,
+  track,
   ...props
 }: SelectDevicePermissionsProps<T>) => {
   const { t } = useTranslation('rooms', { keyPrefix: 'selectDevice' })
@@ -74,6 +80,16 @@ const SelectDevicePermissions = <T extends string | number>({
         await setActiveMediaDevice(key as string)
         onSubmit?.(key as string)
       }}
+      menuFooter={
+        kind === 'audioinput' ? (
+          <AudioLevelGauge track={track} variant={props.variant} />
+        ) : kind === 'audiooutput' && canTestAudioOutput() ? (
+          <OutputSoundTester
+            sinkId={selectedKey as string}
+            variant={props.variant}
+          />
+        ) : undefined
+      }
       {...props}
     />
   )
@@ -84,6 +100,7 @@ export const SelectDevice = ({
   onSubmit,
   kind,
   context = 'join',
+  track,
 }: SelectDeviceProps) => {
   const { t } = useTranslation('rooms', { keyPrefix: 'selectDevice' })
 
@@ -116,6 +133,7 @@ export const SelectDevice = ({
       id={id}
       onSubmit={onSubmit}
       kind={kind}
+      track={track}
       iconComponent={deviceIcons.select}
       {...contextProps}
     />

src/frontend/src/features/rooms/livekit/components/controls/Device/ToggleDevice.tsx

@@ -1,7 +1,7 @@
 import { ToggleButton } from '@/primitives'
 import { useRegisterKeyboardShortcut } from '@/features/shortcuts/useRegisterKeyboardShortcut'
 import { useScreenReaderAnnounce } from '@/hooks/useScreenReaderAnnounce'
-import { useMemo, useState } from 'react'
+import { useMemo, useRef, useState } from 'react'
 import { appendShortcutLabel } from '@/features/shortcuts/utils'
 import { useTranslation } from 'react-i18next'
 import { PermissionNeededButton } from './PermissionNeededButton'
@@ -16,6 +16,7 @@ import type { ButtonRecipeProps } from '@/primitives/buttonRecipe'
 import type { ToggleButtonProps } from '@/primitives/ToggleButton'
 import { openPermissionsDialog } from '@/stores/permissions'
 import { useCannotUseDevice } from '../../../hooks/useCannotUseDevice'
+import { requestDevicePermission } from '../../../hooks/useJoinTracks'
 import { useDeviceIcons } from '../../../hooks/useDeviceIcons'
 import { useDeviceShortcut } from '../../../hooks/useDeviceShortcut'
 import type {
@@ -93,6 +94,27 @@ export const ToggleDevice = <T extends ToggleSource>({
   const deviceShortcut = useDeviceShortcut(kind)
   const announce = useScreenReaderAnnounce()
 
+  const isRequestingPermission = useRef(false)
+
+  const onPress = async () => {
+    if (!cannotUseDevice) {
+      toggle()
+      return
+    }
+    if (isRequestingPermission.current) return
+    isRequestingPermission.current = true
+    try {
+      const granted = await requestDevicePermission(kind)
+      if (granted) {
+        toggle()
+      } else {
+        openPermissionsDialog(kind)
+      }
+    } finally {
+      isRequestingPermission.current = false
+    }
+  }
+
   useRegisterKeyboardShortcut({
     id: deviceShortcut?.id,
     handler: async () => {
@@ -147,12 +169,7 @@ export const ToggleDevice = <T extends ToggleSource>({
           isDisabled || cannotUseDevice || !enabled ? errorVariant : variant
         }
         shySelected
-        onPress={() => {
-          if (cannotUseDevice) {
-            openPermissionsDialog(kind)
-          }
-          toggle()
-        }}
+        onPress={onPress}
         aria-label={toggleLabel}
         tooltip={
           cannotUseDevice

src/frontend/src/features/rooms/livekit/components/controls/LeaveButton.tsx

@@ -3,6 +3,7 @@ import { Button } from '@/primitives'
 import { RiPhoneFill } from '@remixicon/react'
 import { useTranslation } from 'react-i18next'
 import { ConnectionState } from 'livekit-client'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const LeaveButton = () => {
   const { t } = useTranslation('rooms', { keyPrefix: 'controls' })
@@ -15,11 +16,11 @@ export const LeaveButton = () => {
       tooltip={t('leave')}
       aria-label={t('leave')}
       onPress={() => {
-        room
-          .disconnect(true)
-          .catch((e) =>
-            console.error('An error occurred while disconnecting:', e)
-          )
+        room.disconnect(true).catch((e) =>
+          reportError('disconnect_failure', e, {
+            context: 'An error occurred while disconnecting:',
+          })
+        )
       }}
       data-attr="controls-leave"
     >

src/frontend/src/features/rooms/livekit/components/effects/EffectsConfiguration.tsx

@@ -33,6 +33,7 @@ import { useConfig } from '@/api/useConfig.ts'
 import { proxy, useSnapshot } from 'valtio'
 import { Spinner } from '@/primitives/Spinner.tsx'
 import { userChoicesStore, saveProcessorConfig } from '@/stores/userChoices'
+import { reportError } from '@/features/analytics/telemetry'
 
 enum BlurRadius {
   NONE = 0,
@@ -238,7 +239,9 @@ export const EffectsConfiguration = ({
 
         updateEffectStatusMessage(config, wasSelectedBeforeToggle)
       } catch (error) {
-        console.error('Error applying effect:', error)
+        reportError('effects_processor_failure', error, {
+          context: 'Error applying effect:',
+        })
       } finally {
         // Without setTimeout the DOM is not refreshing when updating the options.
         setTimeout(() => setProcessorPending(false))

src/frontend/src/features/rooms/livekit/components/effects/FunnyEffects.tsx

@@ -5,6 +5,7 @@ import { RiGlassesLine, RiGoblet2Fill } from '@remixicon/react'
 import { useTranslation } from 'react-i18next'
 import { FaceLandmarksProcessor } from '../blur/FaceLandmarksProcessor'
 import type { LocalVideoTrack } from 'livekit-client'
+import { reportError } from '@/features/analytics/telemetry'
 
 export type FunnyEffectsProps = {
   videoTrack: LocalVideoTrack
@@ -55,7 +56,9 @@ export const FunnyEffects = ({
         await videoTrack.setProcessor(newProcessor)
       }
     } catch (e) {
-      console.error('could not update processor', e)
+      reportError('effects_processor_failure', e, {
+        context: 'could not update processor',
+      })
     } finally {
       onPending(false)
     }

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

@@ -4,6 +4,7 @@ import { useEffect, useMemo, useState } from 'react'
 import { formatPinCode } from '@/features/rooms/utils/telephony'
 import type { ApiRoom } from '@/features/rooms/api/ApiRoom'
 import { getRouteUrl } from '@/navigation/getRouteUrl'
+import { reportError } from '@/features/analytics/telemetry'
 
 const COPY_SUCCESS_TIMEOUT = 3000
 
@@ -58,7 +59,7 @@ export const useCopyRoomToClipboard = (room: ApiRoom | undefined) => {
       await navigator.clipboard.writeText(content)
       setIsCopied(true)
     } catch (error) {
-      console.error(error)
+      reportError('clipboard_failure', error)
     }
   }
 
@@ -67,7 +68,7 @@ export const useCopyRoomToClipboard = (room: ApiRoom | undefined) => {
       await navigator.clipboard.writeText(roomUrl)
       setIsRoomUrlCopied(true)
     } catch (error) {
-      console.error(error)
+      reportError('clipboard_failure', error)
     }
   }
 

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

@@ -4,6 +4,7 @@
 
 import { useMemo, useState } from 'react'
 import { type TrackReferenceOrPlaceholder } from '@livekit/components-core'
+import { reportError } from '@/features/analytics/telemetry'
 
 export function useFullScreen({
   trackRef,
@@ -56,7 +57,9 @@ export function useFullScreen({
         await docEl.msRequestFullscreen()
       }
     } catch (error) {
-      console.error('Error entering fullscreen:', error)
+      reportError('fullscreen_failure', error, {
+        context: 'Error entering fullscreen:',
+      })
     }
   }
 
@@ -70,7 +73,9 @@ export function useFullScreen({
         await document.msExitFullscreen()
       }
     } catch (error) {
-      console.error('Error exiting fullscreen:', error)
+      reportError('fullscreen_failure', error, {
+        context: 'Error exiting fullscreen:',
+      })
     }
   }
 

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

@@ -0,0 +1,256 @@
+import { useCallback, useEffect, useRef, useState } from 'react'
+import { useSnapshot } from 'valtio'
+import {
+  createLocalAudioTrack,
+  createLocalVideoTrack,
+  type LocalAudioTrack,
+  type LocalVideoTrack,
+  MediaDeviceFailure,
+  TrackEvent,
+} from 'livekit-client'
+import { BackgroundProcessorFactory } from '../components/blur'
+import {
+  notePermissionDeniedFromGum,
+  type PermissionKind,
+} from '@/stores/permissions'
+import { reportError } from '@/features/analytics/telemetry'
+import {
+  saveAudioInputDeviceId,
+  saveAudioInputEnabled,
+  saveVideoInputDeviceId,
+  saveVideoInputEnabled,
+  userChoicesStore,
+} from '@/stores/userChoices'
+import { useSyncTrackDeviceId } from './useSyncTrackDeviceId'
+
+const VOICE_AUDIO_CONSTRAINTS = {
+  noiseSuppression: true,
+  echoCancellation: true,
+  autoGainControl: true,
+  voiceIsolation: false,
+  sampleRate: 48000,
+  channelCount: 1,
+  sampleSize: 16,
+} as const
+
+const PERMISSION_KIND: Record<'audioinput' | 'videoinput', PermissionKind> = {
+  audioinput: 'microphone',
+  videoinput: 'camera',
+}
+
+export const onJoinPreviewError = (e: Error, kind?: PermissionKind) => {
+  reportError('join_preview_failure', e, { path: 'join_preview' })
+  if (
+    MediaDeviceFailure.getFailure(e) === MediaDeviceFailure.PermissionDenied
+  ) {
+    notePermissionDeniedFromGum(kind)
+  }
+}
+
+// Module-level: effect dependencies, must be referentially stable.
+const disableAudio = () => saveAudioInputEnabled(false)
+const disableVideo = () => saveVideoInputEnabled(false)
+
+const stopAll = (stream: MediaStream) =>
+  stream.getTracks().forEach((track) => track.stop())
+
+export const requestDevicePermission = async (
+  kind: 'audioinput' | 'videoinput'
+): Promise<boolean> => {
+  try {
+    const track =
+      kind === 'audioinput'
+        ? await createLocalAudioTrack()
+        : await createLocalVideoTrack()
+    track.stop()
+    return true
+  } catch (error) {
+    onJoinPreviewError(error as Error, PERMISSION_KIND[kind])
+    return false
+  }
+}
+
+/**
+ * Requests camera and microphone once on mount (one combined call → at
+ * most one browser dialog) and releases them immediately. Returns true
+ * once settled; track acquisition must wait for it to avoid a second
+ * dialog.
+ */
+function useWarmupPermissions(): boolean {
+  const [done, setDone] = useState(false)
+  const started = useRef(false)
+
+  useEffect(() => {
+    if (started.current) {
+      return
+    }
+    started.current = true
+
+    const warmup = async () => {
+      try {
+        stopAll(
+          await navigator.mediaDevices.getUserMedia({
+            audio: true,
+            video: true,
+          })
+        )
+      } catch (error) {
+        if (
+          MediaDeviceFailure.getFailure(error as Error) ===
+          MediaDeviceFailure.PermissionDenied
+        ) {
+          // Retrying after a dismissal would show a second dialog.
+          onJoinPreviewError(error as Error)
+          return
+        }
+        // Combined requests fail atomically (e.g. missing webcam fails the
+        // mic too) — retry per kind; permission is settled, no dialog risk.
+        try {
+          stopAll(await navigator.mediaDevices.getUserMedia({ audio: true }))
+        } catch (e) {
+          onJoinPreviewError(e as Error, 'microphone')
+        }
+        try {
+          stopAll(await navigator.mediaDevices.getUserMedia({ video: true }))
+        } catch (e) {
+          onJoinPreviewError(e as Error, 'camera')
+        }
+      } finally {
+        setDone(true)
+      }
+    }
+    warmup()
+  }, [])
+
+  return done
+}
+
+function useLocalTrack<T extends LocalAudioTrack | LocalVideoTrack>({
+  ready,
+  enabled,
+  create,
+  permissionKind,
+  onFailure,
+}: {
+  ready: boolean
+  enabled: boolean
+  create: () => Promise<T>
+  permissionKind: PermissionKind
+  onFailure: () => void
+}): T | null {
+  const [track, setTrack] = useState<T | null>(null)
+
+  // Acquire.
+  useEffect(() => {
+    if (!ready || !enabled || track) {
+      return
+    }
+    let cancelled = false
+    create()
+      .then((newTrack) => {
+        if (cancelled) {
+          newTrack.stop()
+          return
+        }
+        setTrack(newTrack)
+      })
+      .catch((error) => {
+        onJoinPreviewError(error as Error, permissionKind)
+        onFailure()
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [ready, enabled, track, create, permissionKind, onFailure])
+
+  // Release on toggle-off so the LED turns off.
+  useEffect(() => {
+    if (!enabled && track) {
+      track.stop()
+      setTrack(null)
+    }
+  }, [enabled, track])
+
+  // Track ended externally (permission revoked, device unplugged):
+  // disable instead of re-acquiring, so no unsolicited dialog.
+  useEffect(() => {
+    if (!track) {
+      return
+    }
+    const handleEnded = () => {
+      setTrack(null)
+      onFailure()
+    }
+    track.on(TrackEvent.Ended, handleEnded)
+    return () => {
+      track.off(TrackEvent.Ended, handleEnded)
+    }
+  }, [track, onFailure])
+
+  // Release on unmount or replacement.
+  useEffect(() => {
+    return () => {
+      track?.stop()
+    }
+  }, [track])
+
+  return track
+}
+
+export function useJoinTracks(): {
+  audioTrack: LocalAudioTrack | undefined
+  videoTrack: LocalVideoTrack | undefined
+} {
+  const {
+    audioEnabled,
+    videoEnabled,
+    audioDeviceId,
+    videoDeviceId,
+    processorConfig,
+  } = useSnapshot(userChoicesStore)
+
+  const ready = useWarmupPermissions()
+
+  const createAudio = useCallback(
+    () =>
+      createLocalAudioTrack({
+        deviceId: audioDeviceId,
+        ...VOICE_AUDIO_CONSTRAINTS,
+      }),
+    [audioDeviceId]
+  )
+
+  const createVideo = useCallback(
+    () =>
+      createLocalVideoTrack({
+        deviceId: videoDeviceId,
+        processor:
+          BackgroundProcessorFactory.fromProcessorConfig(processorConfig),
+      }),
+    [videoDeviceId, processorConfig]
+  )
+
+  const audioTrack = useLocalTrack({
+    ready,
+    enabled: audioEnabled,
+    create: createAudio,
+    permissionKind: 'microphone',
+    onFailure: disableAudio,
+  })
+
+  const videoTrack = useLocalTrack({
+    ready,
+    enabled: videoEnabled,
+    create: createVideo,
+    permissionKind: 'camera',
+    onFailure: disableVideo,
+  })
+
+  useSyncTrackDeviceId(audioTrack ?? undefined, saveAudioInputDeviceId)
+  useSyncTrackDeviceId(videoTrack ?? undefined, saveVideoInputDeviceId)
+
+  return {
+    audioTrack: audioTrack ?? undefined,
+    videoTrack: videoTrack ?? undefined,
+  }
+}

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

@@ -1,6 +1,7 @@
 import { usePatchRoom } from '@/features/rooms/api/patchRoom'
 import { useRoomData } from '@/features/rooms/livekit/hooks/useRoomData'
 import { useCallback } from 'react'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const usePermissionsManager = () => {
   const { mutateAsync: patchRoom } = usePatchRoom()
@@ -28,7 +29,9 @@ export const usePermissionsManager = () => {
 
         return { configuration: newConfiguration }
       } catch (error) {
-        console.error('Failed to update muting permission:', error)
+        reportError('permissions_api_failure', error, {
+          context: 'Failed to update muting permission:',
+        })
         return { success: false, error }
       }
     },

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

@@ -12,6 +12,7 @@ import {
   NotificationType,
   useNotifyParticipants,
 } from '@/features/notifications'
+import { reportError } from '@/features/analytics/telemetry'
 
 export const updatePublishSources = (
   currentSources: Source[],
@@ -108,7 +109,9 @@ export const usePublishSourcesManager = () => {
 
         return { configuration: newConfiguration }
       } catch (error) {
-        console.error(`Failed to update ${sources}:`, error)
+        reportError('publish_sources_failure', error, {
+          context: `Failed to update ${sources}:`,
+        })
         return { success: false, error }
       }
     },

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

@@ -8,6 +8,7 @@ import {
 import { isLocal } from '@/utils/livekit'
 import { useMemo } from 'react'
 import { useRaiseHand } from '@/features/rooms/api/updateRaiseHand'
+import { reportError } from '@/features/analytics/telemetry'
 
 type useRaisedHandProps = {
   participant: Participant
@@ -79,8 +80,11 @@ export function useRaisedHand({ participant }: useRaisedHandProps) {
     try {
       await raiseHand(!isHandRaised)
     } catch (e) {
-      console.error(
-        `Failed to toggle hand: ${e instanceof Error ? e.message : 'Unknown error'}`
+      reportError(
+        'generic_failure',
+        new Error(
+          `Failed to toggle hand: ${e instanceof Error ? e.message : 'Unknown error'}`
+        )
       )
     }
   }

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

@@ -1,22 +0,0 @@
-import { useEffect, useRef } from 'react'
-
-export const useResolveInitiallyDefaultDeviceId = <
-  T extends { getDeviceId(): Promise<string | undefined> },
->(
-  currentId: string,
-  track: T | undefined,
-  save: (id: string) => void
-) => {
-  const isInitiated = useRef(false)
-  useEffect(() => {
-    if (currentId !== 'default' || !track || isInitiated.current) return
-    const resolveDefaultDeviceId = async () => {
-      const actualDeviceId = await track.getDeviceId()
-      if (actualDeviceId && actualDeviceId !== 'default') {
-        isInitiated.current = true
-        save(actualDeviceId)
-      }
-    }
-    resolveDefaultDeviceId()
-  }, [currentId, track, save])
-}

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

@@ -0,0 +1,44 @@
+import { useEffect } from 'react'
+import { TrackEvent, type LocalTrack } from 'livekit-client'
+
+/**
+ * Keeps the persisted device preference aligned with the device the track
+ * is ACTUALLY using — the track is the ground truth, not the store.
+ *
+ * Syncs on mount and on every TrackEvent.Restarted, which covers all the
+ * moments the underlying device can change on the join screen:
+ *  - initial acquisition where LiveKit resolved the 'default' alias
+ *    (getDeviceId(normalize=true) resolves it to the concrete id via
+ *    livekit's DeviceManager — this replaces the former
+ *    useResolveInitiallyDefaultDeviceId, which never fired after init),
+ *  - a device switch via setDeviceId,
+ *  - an unmute re-acquisition,
+ *  - the browser falling back to another device.
+ */
+export const useSyncTrackDeviceId = (
+  track: LocalTrack | undefined,
+  save: (deviceId: string) => void
+) => {
+  useEffect(() => {
+    if (!track) return
+    let cancelled = false
+    const sync = () => {
+      track
+        .getDeviceId()
+        .then((deviceId) => {
+          if (!cancelled && deviceId && deviceId !== 'default') {
+            save(deviceId)
+          }
+        })
+        .catch(() => {
+          // A track without settings (ended, screen share) has no id to sync.
+        })
+    }
+    sync()
+    track.on(TrackEvent.Restarted, sync)
+    return () => {
+      cancelled = true
+      track.off(TrackEvent.Restarted, sync)
+    }
+  }, [track, save])
+}

src/frontend/src/features/rooms/livekit/prefabs/VideoConference.tsx

@@ -11,6 +11,7 @@ import { SidePanel } from '../components/SidePanel'
 import { RecordingProvider } from '@/features/recording'
 import { ScreenShareErrorModal } from '../components/ScreenShareErrorModal'
 import { ConnectionObserver } from '../components/ConnectionObserver'
+import { reportError } from '@/features/analytics/telemetry'
 import { MediaStateObserver } from '../components/MediaStateObserver'
 import { RoomMetadataSynchronizer } from '../components/RoomMetadataSynchronizer'
 import { useRoomPageTitle } from '../hooks/useRoomPageTitle'
@@ -25,6 +26,7 @@ import { PipRoomPlaceholder } from '@/features/pip/components/PipRoomPlaceholder
 import { StageLayout } from '@/features/layout/components/StageLayout'
 import { PinAnnouncer } from '@/features/layout/components/PinAnnouncer'
 import { ChatProvider } from '@/features/chat/components/ChatProvider'
+import { SyncDevicePreferences } from '@/features/rooms/livekit/components/SyncDevicePreferences'
 
 /**
  * @public
@@ -64,6 +66,7 @@ export function VideoConference({ ...props }: VideoConferenceProps) {
     <>
       <RoomMetadataSynchronizer />
       <ConnectionObserver />
+      <SyncDevicePreferences />
       <MediaStateObserver />
       <ChatProvider />
       <VideoResolutionSubscription />
@@ -91,7 +94,10 @@ export function VideoConference({ ...props }: VideoConferenceProps) {
             </RoomContentArea>
             <ControlBar
               onDeviceError={(e) => {
-                console.error(e)
+                reportError('device_switch_failure', e.error, {
+                  at: 'ControlBar.onDeviceError',
+                  source: e.source,
+                })
                 if (
                   e.source == Track.Source.ScreenShare &&
                   e.error.toString() ==

src/frontend/src/features/rooms/utils/canTestAudioOutput.ts

@@ -0,0 +1,3 @@
+export const canTestAudioOutput = () =>
+  typeof HTMLMediaElement !== 'undefined' &&
+  'setSinkId' in HTMLMediaElement.prototype // Safari: no output routing

src/frontend/src/features/sdk/routes/CreatePopup.tsx

@@ -5,6 +5,7 @@ import { useUser } from '@/features/auth/api/useUser'
 import { Spinner } from '@/primitives/Spinner'
 import { CallbackIdHandler } from '../utils/CallbackIdHandler'
 import { PopupWindow } from '../utils/PopupWindow'
+import { reportError } from '@/features/analytics/telemetry'
 
 const callbackIdHandler = new CallbackIdHandler()
 const popupWindow = new PopupWindow()
@@ -52,7 +53,9 @@ const CreatePopup = () => {
           popupWindow.close()
         })
       } catch (error) {
-        console.error('Failed to create meeting room:', error)
+        reportError('generic_failure', error, {
+          context: 'Failed to create meeting room:',
+        })
       }
     }
     if (isLoggedIn && callbackId) {

src/frontend/src/features/sdk/routes/SettingsPopup.tsx

@@ -15,6 +15,7 @@ import { usePatchRoom } from '@/features/rooms/api/patchRoom'
 import { ApiAccessLevel } from '@/features/rooms/api/ApiRoom'
 import { updatePublishSources } from '@/features/rooms/livekit/hooks/usePublishSourcesManager'
 import { isSubsetOf } from '@/features/rooms/utils/isSubsetOf'
+import { reportError } from '@/features/analytics/telemetry'
 
 type Source = Track.Source
 
@@ -108,7 +109,7 @@ const SettingsPopup = () => {
     patchRoom({
       roomId: roomSlug,
       room: { configuration: newConfiguration },
-    }).catch((e) => console.error(e))
+    }).catch((e) => reportError('generic_failure', e))
   }
 
   const updateSource = (sources: Source[], enabled: boolean) => {
@@ -329,7 +330,7 @@ const SettingsPopup = () => {
               patchRoom({
                 roomId: roomSlug,
                 room: { access_level: value as ApiAccessLevel },
-              }).catch((e) => console.error(e))
+              }).catch((e) => reportError('generic_failure', e))
             }
             items={[
               {

src/frontend/src/features/sdk/utils/PopupWindow.ts

@@ -1,5 +1,6 @@
 import { authUrl } from '@/features/auth/utils/authUrl'
 import { PopupMessageType, CallbackCreationRoomData } from './types'
+import { reportError } from '@/features/analytics/telemetry'
 
 export class PopupWindow {
   private sendMessageToManager(
@@ -9,7 +10,7 @@ export class PopupWindow {
     callback?: () => void
   ) {
     if (!window.opener) {
-      console.error('No manager window found')
+      reportError('generic_failure', new Error('No manager window found'))
       window.close()
       return
     }

src/frontend/src/features/settings/components/tabs/AccountTab.tsx

@@ -11,6 +11,7 @@ import { useRenameParticipant } from '@/features/rooms/api/renameParticipant'
 import { saveUsername } from '@/stores/user'
 import { logout } from '@/features/auth/utils/logout'
 import { useConfig } from '@/api/useConfig'
+import { reportError } from '@/features/analytics/telemetry'
 
 export type AccountTabProps = Pick<DialogProps, 'onOpenChange'> &
   Pick<TabPanelProps, 'id'>
@@ -35,8 +36,11 @@ export const AccountTab = ({ id, onOpenChange }: AccountTabProps) => {
       saveUsername(name)
       onOpenChange?.(false) // only close on success
     } catch (error) {
-      console.error(
-        `Failed to rename participant: ${error instanceof Error ? error.message : 'Unknown error'}`
+      reportError(
+        'generic_failure',
+        new Error(
+          `Failed to rename participant: ${error instanceof Error ? error.message : 'Unknown error'}`
+        )
       )
     }
   }

src/frontend/src/features/settings/components/tabs/AudioTab.tsx

@@ -11,7 +11,6 @@ import { useTranslation } from 'react-i18next'
 import { SoundTester } from '@/components/SoundTester'
 import { ActiveSpeaker } from '@/features/rooms/components/ActiveSpeaker'
 import { useNoiseReductionAvailable } from '@/features/rooms/livekit/hooks/useNoiseReductionAvailable'
-import posthog from 'posthog-js'
 import { RowWrapper } from './layout/RowWrapper'
 import { useSnapshot } from 'valtio'
 import {
@@ -20,6 +19,7 @@ import {
   saveNoiseReductionEnabled,
   userChoicesStore,
 } from '@/stores/userChoices'
+import { captureEvent } from '@/features/analytics/telemetry'
 
 export type AudioTabProps = Pick<DialogProps, 'onOpenChange'> &
   Pick<TabPanelProps, 'id'>
@@ -128,7 +128,7 @@ export const AudioTab = ({ id }: AudioTabProps) => {
             isSelected={noiseReductionEnabled}
             onChange={(v) => {
               saveNoiseReductionEnabled(v)
-              if (v) posthog.capture('noise-reduction-init')
+              if (v) captureEvent('noise-reduction-init')
             }}
           >
             {t('audio.noiseReduction.label')}

src/frontend/src/locales/de/rooms.json

@@ -29,6 +29,8 @@
     },
     "audioinput": {
       "choose": "Mikrofon auswählen",
+      "level": "Mikrofon-Eingangspegel",
+      "muteTest": "Aktivieren Sie Ihr Mikrofon, um es zu testen",
       "permissionsNeeded": "Mikrofon auswählen – Berechtigung erforderlich",
       "disable": "Mikrofon deaktivieren",
       "enable": "Mikrofon aktivieren",
@@ -38,7 +40,9 @@
     },
     "audiooutput": {
       "choose": "Audioausgabe auswählen",
-      "permissionsNeeded": "Audioausgabe auswählen – Berechtigung erforderlich"
+      "permissionsNeeded": "Audioausgabe auswählen – Berechtigung erforderlich",
+      "test": "Lautsprecher testen",
+      "testing": "Testton wird abgespielt…"
     }
   },
   "join": {
@@ -326,7 +330,6 @@
         }
       }
     },
-
     "faceLandmarks": {
       "title": "Visuelle Effekte",
       "glasses": {

src/frontend/src/locales/en/rooms.json

@@ -29,6 +29,8 @@
     },
     "audioinput": {
       "choose": "Select microphone",
+      "level": "Microphone input level",
+      "muteTest": "Turn on your microphone to test it",
       "permissionsNeeded": "Select microphone - permission needed",
       "disable": "Disable microphone",
       "enable": "Enable microphone",
@@ -38,7 +40,9 @@
     },
     "audiooutput": {
       "choose": "Select speaker",
-      "permissionsNeeded": "Select speaker - permission needed"
+      "permissionsNeeded": "Select speaker - permission needed",
+      "test": "Test speakers",
+      "testing": "Playing test sound…"
     }
   },
   "join": {

src/frontend/src/locales/fr/rooms.json

@@ -29,6 +29,8 @@
     },
     "audioinput": {
       "choose": "Choisir le micro",
+      "level": "Niveau d'entrée du micro",
+      "muteTest": "Activez votre micro pour le tester",
       "permissionsNeeded": "Choisir le micro - autorisations nécessaires",
       "disable": "Désactiver le micro",
       "enable": "Activer le micro",
@@ -38,7 +40,9 @@
     },
     "audiooutput": {
       "choose": "Choisir le haut-parleur",
-      "permissionsNeeded": "Choisir le haut-parleur - autorisations nécessaires"
+      "permissionsNeeded": "Choisir le haut-parleur - autorisations nécessaires",
+      "test": "Tester les haut-parleurs",
+      "testing": "Lecture du son de test…"
     }
   },
   "join": {

src/frontend/src/locales/nl/rooms.json

@@ -29,6 +29,8 @@
     },
     "audioinput": {
       "choose": "Selecteer microfoon",
+      "level": "Microfoon-ingangsniveau",
+      "muteTest": "Zet je microfoon aan om deze te testen",
       "permissionsNeeded": "Selecteer microfoon - Toestemming vereist",
       "disable": "Microfoon dempen",
       "enable": "Microfoon dempen opheffen",
@@ -38,7 +40,9 @@
     },
     "audiooutput": {
       "choose": "Selecteer luidspreker",
-      "permissionsNeeded": "Selecteer luidspreker - Toestemming vereist"
+      "permissionsNeeded": "Selecteer luidspreker - Toestemming vereist",
+      "test": "Luidsprekers testen",
+      "testing": "Testgeluid wordt afgespeeld…"
     }
   },
   "join": {

src/frontend/src/primitives/Checkbox.tsx

@@ -8,6 +8,7 @@ import { type StyledVariantProps } from '@/styled-system/types'
 import { styled } from '@/styled-system/jsx'
 import { FieldErrors } from './FieldErrors'
 import { FieldDescription } from './FieldDescription'
+import { reportError } from '@/features/analytics/telemetry'
 
 // styled taken from example at https://react-spectrum.adobe.com/react-aria/Checkbox.html
 const StyledCheckbox = styled(RACCheckbox, {
@@ -112,8 +113,11 @@ export const Checkbox = ({
   const descriptionId = useId()
 
   if (isInvalid !== undefined) {
-    console.error(
-      'Checkbox: passing isInvalid is not supported, use the validate prop instead'
+    reportError(
+      'generic_failure',
+      new Error(
+        'Checkbox: passing isInvalid is not supported, use the validate prop instead'
+      )
     )
     return null
   }

src/frontend/src/primitives/Select.tsx

@@ -99,6 +99,7 @@ export type SelectProps<T> = Omit<
   errors?: ReactNode
   placement?: Placement
   variant?: 'light' | 'dark'
+  menuFooter?: ReactNode
 }
 
 export const Select = <T extends string | number>({
@@ -108,6 +109,7 @@ export const Select = <T extends string | number>({
   errors,
   placement,
   variant = 'light',
+  menuFooter,
   ...props
 }: SelectProps<T>) => {
   const IconComponent = iconComponent
@@ -155,6 +157,7 @@ export const Select = <T extends string | number>({
               </ListBoxItem>
             ))}
           </ListBox>
+          {menuFooter}
         </Box>
       </StyledPopover>
       {errors}

src/frontend/src/stores/accessibility.ts

@@ -1,6 +1,7 @@
 import { proxy, subscribe } from 'valtio'
 import { STORAGE_KEYS } from '@/utils/storageKeys'
 import { deserializeToProxyMap } from '@/utils/valtio'
+import { reportError } from '@/features/analytics/telemetry'
 
 export type UiFont =
   | 'default'
@@ -154,10 +155,9 @@ function getAccessibilityState(): AccessibilityState {
 
     return DEFAULT_STATE
   } catch (error: unknown) {
-    console.error(
-      '[AccessibilityStore] Failed to parse stored settings:',
-      error
-    )
+    reportError('generic_failure', error, {
+      context: '[AccessibilityStore] Failed to parse stored settings:',
+    })
     return DEFAULT_STATE
   }
 }

src/frontend/src/stores/notifications.ts

@@ -3,6 +3,7 @@ import { proxyMap } from 'valtio/utils'
 import { deserializeToProxyMap, serializeProxyMap } from '@/utils/valtio'
 import { STORAGE_KEYS } from '@/utils/storageKeys'
 import { NotificationType } from '@/features/notifications/NotificationType'
+import { reportError } from '@/features/analytics/telemetry'
 
 type State = {
   soundNotifications: Map<NotificationType, boolean>
@@ -41,10 +42,9 @@ function getNotificationsState(): State {
       ),
     }
   } catch (error: unknown) {
-    console.error(
-      '[NotificationsStore] Failed to parse stored settings:',
-      error
-    )
+    reportError('generic_failure', error, {
+      context: '[NotificationsStore] Failed to parse stored settings:',
+    })
     return DEFAULT_STATE
   }
 }

src/frontend/src/stores/permissions.ts

@@ -1,22 +1,13 @@
 import { proxy } from 'valtio'
-import { derive } from 'derive-valtio'
 
-type PermissionState =
-  | undefined
-  | 'granted'
-  | 'prompt'
-  | 'denied'
-  | 'unavailable'
+type PermissionState = undefined | 'granted' | 'prompt' | 'denied'
 
-type BaseState = {
+type State = {
   cameraPermission: PermissionState
   microphonePermission: PermissionState
   isLoading: boolean
   isPermissionDialogOpen: boolean
   requestOrigin?: 'audioinput' | 'videoinput'
-}
-
-type DerivedState = {
   isCameraGranted: boolean
   isMicrophoneGranted: boolean
   isCameraDenied: boolean
@@ -25,34 +16,31 @@ type DerivedState = {
   isMicrophonePrompted: boolean
 }
 
-type State = BaseState & DerivedState
-
-export const permissionsStore = proxy<BaseState>({
+export const permissionsStore = proxy<State>({
   cameraPermission: undefined,
   microphonePermission: undefined,
   isLoading: true,
   isPermissionDialogOpen: false,
   requestOrigin: undefined,
-}) as State
-
-derive(
-  {
-    isCameraGranted: (get) =>
-      get(permissionsStore).cameraPermission == 'granted',
-    isMicrophoneGranted: (get) =>
-      get(permissionsStore).microphonePermission == 'granted',
-    isCameraDenied: (get) => get(permissionsStore).cameraPermission == 'denied',
-    isMicrophoneDenied: (get) =>
-      get(permissionsStore).microphonePermission == 'denied',
-    isCameraPrompted: (get) =>
-      get(permissionsStore).cameraPermission == 'prompt',
-    isMicrophonePrompted: (get) =>
-      get(permissionsStore).microphonePermission == 'prompt',
+  get isCameraGranted() {
+    return this.cameraPermission === 'granted'
   },
-  {
-    proxy: permissionsStore,
-  }
-)
+  get isMicrophoneGranted() {
+    return this.microphonePermission === 'granted'
+  },
+  get isCameraDenied() {
+    return this.cameraPermission === 'denied'
+  },
+  get isMicrophoneDenied() {
+    return this.microphonePermission === 'denied'
+  },
+  get isCameraPrompted() {
+    return this.cameraPermission === 'prompt'
+  },
+  get isMicrophonePrompted() {
+    return this.microphonePermission === 'prompt'
+  },
+})
 
 export const openPermissionsDialog = (
   requestOrigin?: 'audioinput' | 'videoinput'
@@ -64,3 +52,84 @@ export const openPermissionsDialog = (
 export const closePermissionsDialog = () => {
   permissionsStore.isPermissionDialogOpen = false
 }
+
+export type PermissionKind = 'camera' | 'microphone'
+
+const KIND_MAP = {
+  camera: 'videoinput',
+  microphone: 'audioinput',
+} as const
+
+export const PERMISSION_BY_DEVICE_KIND: Partial<
+  Record<MediaDeviceKind, PermissionKind>
+> = {
+  videoinput: 'camera',
+  audioinput: 'microphone',
+}
+
+export const setPermissions = (
+  p: Partial<Record<PermissionKind, PermissionState>>
+) => {
+  if (p.camera && p.camera !== permissionsStore.cameraPermission) {
+    permissionsStore.cameraPermission = p.camera
+  }
+  if (p.microphone && p.microphone !== permissionsStore.microphonePermission) {
+    permissionsStore.microphonePermission = p.microphone
+  }
+  permissionsStore.isLoading = false
+}
+
+const queryPermission = async (name: PermissionKind) => {
+  try {
+    const status = await navigator.permissions.query({
+      name: name as PermissionName,
+    })
+    return status.state
+  } catch {
+    return undefined
+  }
+}
+
+const labelsVisible = async () => {
+  try {
+    const devices = await navigator.mediaDevices.enumerateDevices()
+    return (kind: PermissionKind) =>
+      devices.some((d) => d.kind === KIND_MAP[kind] && !!d.label)
+  } catch {
+    return (_kind: PermissionKind) => false
+  }
+}
+
+export const syncPermissions = async () => {
+  const [camera, microphone] = await Promise.all([
+    queryPermission('camera'),
+    queryPermission('microphone'),
+  ])
+  if (camera && microphone) {
+    setPermissions({ camera, microphone })
+    return
+  }
+  const granted = await labelsVisible()
+  const resolve = (kind: PermissionKind, queried?: PermissionState) => {
+    if (queried) return queried
+    const current =
+      kind === 'camera'
+        ? permissionsStore.cameraPermission
+        : permissionsStore.microphonePermission
+    if (current === 'denied') return 'denied'
+    return granted(kind) ? 'granted' : 'prompt'
+  }
+  setPermissions({
+    camera: resolve('camera', camera),
+    microphone: resolve('microphone', microphone),
+  })
+}
+
+export const notePermissionDeniedFromGum = (kind?: PermissionKind) => {
+  if (kind) {
+    setPermissions({ [kind]: 'denied' })
+    void syncPermissions()
+    return
+  }
+  void syncPermissions()
+}

src/frontend/src/stores/user.ts

@@ -1,5 +1,6 @@
 import { proxy, subscribe } from 'valtio'
 import { STORAGE_KEYS } from '@/utils/storageKeys'
+import { reportError } from '@/features/analytics/telemetry'
 
 type State = {
   username: string
@@ -18,10 +19,9 @@ function getUserState(): State {
       ...parsed,
     }
   } catch (error: unknown) {
-    console.error(
-      '[UserPreferencesStore] Failed to parse stored settings:',
-      error
-    )
+    reportError('generic_failure', error, {
+      context: '[UserPreferencesStore] Failed to parse stored settings:',
+    })
     return DEFAULT_STATE
   }
 }

src/frontend/src/stores/userPreferences.ts

@@ -1,5 +1,6 @@
 import { proxy, subscribe } from 'valtio'
 import { STORAGE_KEYS } from '@/utils/storageKeys'
+import { reportError } from '@/features/analytics/telemetry'
 
 type State = {
   is_idle_disconnect_modal_enabled: boolean
@@ -21,10 +22,9 @@ function getUserPreferencesState(): State {
       ...parsed,
     }
   } catch (error: unknown) {
-    console.error(
-      '[UserPreferencesStore] Failed to parse stored settings:',
-      error
-    )
+    reportError('generic_failure', error, {
+      context: '[UserPreferencesStore] Failed to parse stored settings:',
+    })
     return DEFAULT_STATE
   }
 }

src/frontend/src/utils/mergeProps.ts

@@ -13,6 +13,7 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 
 import clsx from 'clsx'
+import { reportError } from '@/features/analytics/telemetry'
 
 /**
  * Calls all functions in the order they were chained with the same arguments.
@@ -25,7 +26,7 @@ export function chain(...callbacks: any[]): (...args: any[]) => void {
         try {
           callback(...args)
         } catch (e) {
-          console.error(e)
+          reportError('generic_failure', e)
         }
       }
     }

src/frontend/src/utils/useIsMobile.ts

@@ -1,20 +1,8 @@
 import { isMobileBrowser } from '@livekit/components-core'
-import { useEffect, useState } from 'react'
+import { useState } from 'react'
 
 export const useIsMobile = () => {
-  const [isMobile, setIsMobile] = useState(isMobileBrowser())
-
-  useEffect(() => {
-    const handleResize = () => {
-      setIsMobile(isMobileBrowser())
-    }
-
-    window.addEventListener('resize', handleResize)
-
-    return () => {
-      window.removeEventListener('resize', handleResize)
-    }
-  }, [])
+  const [isMobile] = useState(() => isMobileBrowser())
 
   return isMobile
 }