✨(frontend) allow promoting authenticated participants

Introduce a new feature that lets a user promote one of the
authenticated participants of the meeting to a role with additional
privileges.

Known limitations:

* Only authenticated participants can be promoted, but there is no
  visual indicator yet distinguishing authenticated from anonymous
  participants. This will be added in a follow-up commit.
* The resource_access data fetched in the initial API call becomes
  stale after a promotion. It is not currently used in the product,
  so this is not visible, but it should either be refreshed later
  or removed from the initial fetch.
* Demoting a promoted user turns them into a member, which is still
  a privileged role. This is a deliberate choice until we introduce
  finer-grained tuning of participant roles.

src/frontend/src/features/participants/components/ParticipantRow.tsx

@@ -5,7 +5,11 @@ import { Text } from '@/primitives/Text'
 import { useTranslation } from 'react-i18next'
 import { Avatar } from '@/components/Avatar'
 import { getParticipantColor } from '@/features/rooms/utils/getParticipantColor'
-import { getParticipantIsRoomOwner } from '@/features/rooms/utils/getParticipantIsRoomAdminOrOwner'
+import {
+  getParticipantIsRoomAdmin,
+  getParticipantIsRoomOwner,
+  getParticipantIsRoomMember,
+} from '@/features/rooms/utils/getParticipantIsRoomAdminOrOwner'
 import { type LocalParticipant, type Participant, Track } from 'livekit-client'
 import { isLocal } from '@/utils/livekit'
 import {
@@ -149,6 +153,12 @@ export const ParticipantRow = ({ participant }: ParticipantListItemProps) => {
           {getParticipantIsRoomOwner(participant) && (
             <Text variant="xsNote">{t('participants.host')}</Text>
           )}
+          {getParticipantIsRoomAdmin(participant) && (
+            <Text variant="xsNote">{t('participants.cohost')}</Text>
+          )}
+          {getParticipantIsRoomMember(participant) && (
+            <Text variant="xsNote">{t('participants.member')}</Text>
+          )}
         </VStack>
       </HStack>
       <HStack>

src/frontend/src/features/participants/components/menu/ParticipantMenu.tsx

@@ -1,24 +1,46 @@
 import { Menu as RACMenu } from 'react-aria-components'
 import type { Participant } from 'livekit-client'
-import { useIsAdminOrOwner } from '@/features/rooms/livekit/hooks/useIsAdminOrOwner'
 import { PinMenuItem } from './items/PinMenuItem'
 import { RemoveMenuItem } from './items/RemoveMenuItem'
+import { PromoteMenuItem } from './items/PromoteMenuItem'
+import { useIsAdminOrOwner } from '@/features/rooms/livekit/hooks/useIsAdminOrOwner'
+import { useParticipantAttributes } from '@livekit/components-react'
 
 export const ParticipantMenu = ({
   participant,
 }: {
   participant: Participant
 }) => {
-  const isAdminOrOwner = useIsAdminOrOwner()
-  const canModerateParticipant = !participant.isLocal && isAdminOrOwner
+  const isLocalUserAdminOrOwner = useIsAdminOrOwner()
+
+  const { attributes } = useParticipantAttributes({ participant })
+
+  const isAdmin = attributes?.room_role === 'administrator'
+  const isOwner = attributes?.room_role === 'owner'
+  const isAuthenticated = attributes?.is_authenticated == 'true'
+
+  const canManage = !participant.isLocal && isLocalUserAdminOrOwner && !isOwner
+
   return (
     <RACMenu
       style={{
-        minWidth: '75px',
+        minWidth: '100px',
       }}
     >
       <PinMenuItem participant={participant} />
-      {canModerateParticipant && <RemoveMenuItem participant={participant} />}
+      {canManage && (
+        <RemoveMenuItem
+          identity={participant.identity}
+          displayedName={participant.name}
+        />
+      )}
+      {canManage && isAuthenticated && (
+        <PromoteMenuItem
+          identity={participant.identity}
+          isAdmin={isAdmin}
+          displayedName={participant.name}
+        />
+      )}
     </RACMenu>
   )
 }

src/frontend/src/features/participants/components/menu/ParticipantMenuButton.tsx

@@ -1,7 +1,6 @@
 import { Button, Menu } from '@/primitives'
 import { RiMore2Fill } from '@remixicon/react'
 import { ParticipantMenu } from './ParticipantMenu'
-import { useIsAdminOrOwner } from '@/features/rooms/livekit/hooks/useIsAdminOrOwner'
 import type { Participant } from 'livekit-client'
 import { useTranslation } from 'react-i18next'
 
@@ -11,8 +10,6 @@ export const ParticipantMenuButton = ({
   participant: Participant
 }) => {
   const { t } = useTranslation('rooms', { keyPrefix: 'participants' })
-  const isAdminOrOwner = useIsAdminOrOwner()
-  if (!isAdminOrOwner) return null
   return (
     <Menu>
       <Button

src/frontend/src/features/participants/components/menu/items/PromoteMenuItem.tsx

@@ -0,0 +1,47 @@
+import React, { useCallback } from 'react'
+import { MenuItem } from 'react-aria-components'
+import { useTranslation } from 'react-i18next'
+import { RiAdminLine, RiUserMinusLine } from '@remixicon/react'
+import { useParticipantRole } from '@/features/participants/api/updateParticipantRole'
+import { menuRecipe } from '@/primitives/menuRecipe'
+import { HStack } from '@/styled-system/jsx'
+
+type PromoteMenuItemProps = {
+  identity: string
+  displayedName?: string
+  isAdmin: boolean
+}
+
+export const PromoteMenuItem = React.memo(
+  ({ identity, displayedName, isAdmin }: PromoteMenuItemProps) => {
+    const { t } = useTranslation('rooms', { keyPrefix: 'participantMenu' })
+
+    const { updateParticipantRole } = useParticipantRole()
+
+    const label = isAdmin ? 'demote' : 'promote'
+    const Icon = isAdmin ? RiUserMinusLine : RiAdminLine
+
+    const toggleRole = useCallback(
+      () =>
+        updateParticipantRole(identity, isAdmin ? 'member' : 'administrator'),
+      [isAdmin, updateParticipantRole, identity]
+    )
+
+    return (
+      <MenuItem
+        aria-label={t(`${label}.ariaLabel`, {
+          name: displayedName || identity,
+        })}
+        className={menuRecipe({ icon: true }).item}
+        onAction={toggleRole}
+      >
+        <HStack gap={0.25} minWidth={280}>
+          <Icon size={20} aria-hidden />
+          {t(`${label}.label`)}
+        </HStack>
+      </MenuItem>
+    )
+  }
+)
+
+PromoteMenuItem.displayName = 'PromoteMenuItem'

src/frontend/src/features/participants/components/menu/items/RemoveMenuItem.tsx

@@ -1,4 +1,4 @@
-import type { Participant } from 'livekit-client'
+import React from 'react'
 import { menuRecipe } from '@/primitives/menuRecipe'
 import { HStack } from '@/styled-system/jsx'
 import { RiCloseLine } from '@remixicon/react'
@@ -6,23 +6,30 @@ import { MenuItem } from 'react-aria-components'
 import { useRemoveParticipant } from '@/features/rooms/api/removeParticipant'
 import { useTranslation } from 'react-i18next'
 
-export const RemoveMenuItem = ({
-  participant,
-}: {
-  participant: Participant
-}) => {
-  const { t } = useTranslation('rooms', { keyPrefix: 'participantMenu.remove' })
-  const { removeParticipant } = useRemoveParticipant()
-  return (
-    <MenuItem
-      aria-label={t('ariaLabel', { name: participant.name })}
-      className={menuRecipe({ icon: true }).item}
-      onAction={() => removeParticipant(participant)}
-    >
-      <HStack gap={0.25}>
-        <RiCloseLine size={20} aria-hidden />
-        {t('label')}
-      </HStack>
-    </MenuItem>
-  )
+type RemoveMenuItemProps = {
+  identity: string
+  displayedName?: string
 }
+
+export const RemoveMenuItem = React.memo(
+  ({ identity, displayedName }: RemoveMenuItemProps) => {
+    const { t } = useTranslation('rooms', {
+      keyPrefix: 'participantMenu.remove',
+    })
+    const { removeParticipant } = useRemoveParticipant()
+    return (
+      <MenuItem
+        aria-label={t('ariaLabel', { name: displayedName || identity })}
+        className={menuRecipe({ icon: true }).item}
+        onAction={() => removeParticipant(identity)}
+      >
+        <HStack gap={0.25}>
+          <RiCloseLine size={20} aria-hidden />
+          {t('label')}
+        </HStack>
+      </MenuItem>
+    )
+  }
+)
+
+RemoveMenuItem.displayName = 'RemoveMenuItem'

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

@@ -1,11 +1,10 @@
-import type { Participant } from 'livekit-client'
 import { useRoomData } from '../livekit/hooks/useRoomData'
 import { fetchApi } from '@/api/fetchApi'
 
 export const useRemoveParticipant = () => {
   const data = useRoomData()
 
-  const removeParticipant = async (participant: Participant) => {
+  const removeParticipant = async (identity: string) => {
     if (!data?.id) {
       throw new Error('Room id is not available')
     }
@@ -13,7 +12,7 @@ export const useRemoveParticipant = () => {
     return fetchApi(`rooms/${data.id}/remove-participant/`, {
       method: 'POST',
       body: JSON.stringify({
-        participant_identity: participant.identity,
+        participant_identity: identity,
       }),
     })
   }

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

@@ -15,6 +15,9 @@ export const getParticipantIsRoomAdmin = (participant: Participant): boolean =>
 export const getParticipantIsRoomOwner = (participant: Participant): boolean =>
   participantHasRoomRole(participant, ['owner'])
 
+export const getParticipantIsRoomMember = (participant: Participant): boolean =>
+  participantHasRoomRole(participant, ['member'])
+
 export const getParticipantIsRoomAdminOrOwner = (
   participant: Participant
 ): boolean => participantHasRoomRole(participant, ['administrator', 'owner'])

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

@@ -583,6 +583,8 @@
     "you": "Du",
     "unknown": "Unbekannte Person",
     "host": "Host",
+    "cohost": "Co-host",
+    "member": "Mitglied",
     "contributors": "Teilnehmende",
     "collapsable": {
       "open": "{{name}}-Liste öffnen",
@@ -627,6 +629,14 @@
     "pin": {
       "label": "Anheften",
       "ariaLabel": "Hefte {{name}} an"
+    },
+    "promote": {
+      "label": "Zum Co-Host machen",
+      "ariaLabel": "{{name}} zum Co-Host machen"
+    },
+    "demote": {
+      "label": "Co-Host-Rolle entfernen",
+      "ariaLabel": "Die Co-Host-Rolle von {{name}} entfernen"
     }
   },
   "pinAnnouncements": {

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

@@ -582,6 +582,8 @@
     "you": "You",
     "unknown": "Unknown participant",
     "host": "Host",
+    "cohost": "Co-host",
+    "member": "Member",
     "contributors": "Contributors",
     "collapsable": {
       "open": "Open {{name}} list",
@@ -626,6 +628,14 @@
     "pin": {
       "label": "Pin",
       "ariaLabel": "Pin {{name}}"
+    },
+    "promote": {
+      "label": "Make co-host",
+      "ariaLabel": "Make {{name}} a co-host"
+    },
+    "demote": {
+      "label": "Remove co-host role",
+      "ariaLabel": "Remove {{name}}'s co-host role"
     }
   },
   "pinAnnouncements": {

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

@@ -583,6 +583,8 @@
     "unknown": "Participant inconnu",
     "contributors": "Contributeurs",
     "host": "Organisateur de la réunion",
+    "cohost": "Co-organisateur",
+    "member": "Membre",
     "collapsable": {
       "open": "Ouvrir la liste {{name}}",
       "close": "Fermer la liste {{name}}"
@@ -626,6 +628,14 @@
     "pin": {
       "label": "Épingler",
       "ariaLabel": "Épingler {{name}}"
+    },
+    "promote": {
+      "label": "Nommer co-organisateur",
+      "ariaLabel": "Nommer {{name}} co-organisateur"
+    },
+    "demote": {
+      "label": "Retirer le rôle de co-organisateur",
+      "ariaLabel": "Retirer le rôle de co-organisateur à {{name}}"
     }
   },
   "pinAnnouncements": {

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

@@ -582,6 +582,8 @@
     "you": "U",
     "unknown": "Onbekende deelnemer",
     "host": "Host",
+    "cohost": "Co-host",
+    "member": "Lid",
     "contributors": "Deelnemers",
     "collapsable": {
       "open": "Open {{name}} lijst",
@@ -626,6 +628,14 @@
     "pin": {
       "label": "Pinnen",
       "ariaLabel": "Maak {{name}} vast"
+    },
+    "promote": {
+      "label": "Co-host maken",
+      "ariaLabel": "{{name}} co-host maken"
+    },
+    "demote": {
+      "label": "Co-hostrol verwijderen",
+      "ariaLabel": "De co-hostrol van {{name}} verwijderen"
     }
   },
   "pinAnnouncements": {