🐛(frontend) keep feedback buttons on a single line

A minor layout regression appeared when switching to the Marianne
font: the feedback buttons wrapped onto two lines instead of
staying on one.

Adjust the layout so the buttons stay on a single line regardless
of the font in use.

CHANGELOG.md

@@ -13,8 +13,6 @@ and this project adheres to
 - ✨(frontend) add 1080p sending resolution option #1660
 - ✨(backend) add Traefik support via configurable media-auth url header #1649
 - ✨(backend) update a room's attributes from the external API
-- 🔊(backend) log request duration in Gunicorn workers
-- 📈(frontend) track missing lobby participant on accept/reject
 
 ### Changed
 
@@ -25,12 +23,6 @@ and this project adheres to
 - 🐛(backend) allow any printable ASCII characters in user sub field #1673
 - 🐛(frontend) keep the sending resolution picked while the camera is off #1667
 - 🐛(frontend) restore automatic lower-hand on speaking
-- 🐛(frontend) center Avatar initials with a font-aware cap-height ratio
-- ⚡️(frontend) increase lobby polling interval on both sides
-- ⚡️(frontend) add trailing slash on the /me endpoint call
-- ⚡️(backend) refactor lobby storage to bound key lookups per room
-- ⚡️(backend) refactor presence cache to bound key lookups per room
-- 💄(frontend) position the login hint dynamically next to the button
 
 ## [1.30.0] - 2026-09-01
 

docker/dinum-frontend/dinum-styles.css

@@ -1,6 +1,5 @@
 :root {
     --fonts-sans: 'Marianne', ui-sans-serif, system-ui, sans-serif;
-    --avatar-cap-height: 0.7;
 }
 
 .Header-beforeLogo {

docker/files/usr/local/etc/gunicorn/meet.py

@@ -14,4 +14,3 @@ accesslog = "-"
 # Using '-' for the error log file makes gunicorn log errors to stderr
 errorlog = "-"
 loglevel = "info"
-access_log_format = '%(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s" %(M)s'

docs/theming.md

@@ -34,7 +34,6 @@ Let's say you want to change the font of our application to a custom font. You c
 
 :root {
   --fonts-sans: 'Roboto', ui-sans-serif, system-ui, sans-serif;
-  --avatar-cap-height: 0.7;
 }
 ```
 

src/backend/core/services/lobby.py

@@ -79,14 +79,6 @@ class LobbyService:
 
     Handles participant entry requests, status management, and notifications
     using cache for state management and LiveKit for real-time updates.
-
-    Participant membership per room is tracked in a native Redis SET (the
-    "room index") so that listing and clearing a room's lobby never scans
-    the shared keyspace. The per-participant cache entries remain the source
-    of truth for state: their TTLs implement liveness (a waiter who stops
-    polling simply expires). The index only records which participant ids
-    may exist for a room; a stale id costs one cache miss and is pruned
-    lazily.
     """
 
     @staticmethod
@@ -94,61 +86,6 @@ class LobbyService:
         """Generate cache key for participant(s) data."""
         return f"{settings.LOBBY_KEY_PREFIX}_{room_id!s}_{participant_id}"
 
-    @staticmethod
-    def _get_index_key(room_id: UUID) -> str:
-        """Raw Redis key of the per-room participant index (a native SET).
-
-        Built through django-redis' make_key so it lives under the same
-        KEY_PREFIX/version namespace as the participant entries.
-        """
-        return cache.client.make_key(f"{settings.LOBBY_KEY_PREFIX}-index_{room_id!s}")
-
-    @staticmethod
-    def _redis(write: bool = True):
-        """Raw redis-py client.
-
-        SADD/SREM/SMEMBERS are not exposed by the Django cache API; this is
-        the documented django-redis escape hatch.
-        """
-        return cache.client.get_client(write=write)
-
-    def _index_add(self, room_id: UUID, participant_id: str) -> None:
-        """Record a participant id in the room index.
-
-        Refreshes a backstop TTL on the index so an abandoned room cannot
-        leak its set beyond the longest participant timeout.
-        """
-        index_key = self._get_index_key(room_id)
-        pipe = self._redis().pipeline(transaction=False)
-        pipe.sadd(index_key, participant_id)
-        pipe.expire(index_key, settings.LOBBY_ACCEPTED_TIMEOUT)
-        pipe.execute()
-
-    def _index_members(self, room_id: UUID) -> List[str]:
-        """All participant ids currently indexed for the room."""
-        members = self._redis(write=False).smembers(self._get_index_key(room_id))
-        return [
-            member.decode() if isinstance(member, bytes) else member
-            for member in members
-        ]
-
-    def _index_touch(self, room_id: UUID) -> None:
-        """Re-arm the room index backstop TTL.
-
-        Called whenever a participant entry is written or refreshed so the
-        index always outlives every entry it references — including a lone
-        waiter whose rolling WAITING TTL would otherwise outlast the
-        backstop set at enter() time.
-        """
-        self._redis().expire(
-            self._get_index_key(room_id), settings.LOBBY_ACCEPTED_TIMEOUT
-        )
-
-    def _index_remove(self, room_id: UUID, *participant_ids: str) -> None:
-        """Drop participant ids from the room index."""
-        if participant_ids:
-            self._redis().srem(self._get_index_key(room_id), *participant_ids)
-
     @staticmethod
     def _get_or_create_participant_id(request) -> str:
         """Extract unique participant identifier from the request."""
@@ -272,16 +209,14 @@ class LobbyService:
         cache.touch(
             self._get_cache_key(room_id, participant_id), settings.LOBBY_WAITING_TIMEOUT
         )
-        self._index_touch(room_id)
 
     def enter(
         self, room_id: UUID, participant_id: str, username: str
     ) -> LobbyParticipant:
         """Add participant to waiting lobby.
 
-        Create a new participant entry in waiting status, index the
+        Create a new participant entry in waiting status and notify room
-        participant id for the room, and notify room participants of the
+        participants of the new entry request.
-        new entry request.
         """
 
         color = utils.generate_color(participant_id)
@@ -310,7 +245,6 @@ class LobbyService:
             participant.to_dict(),
             timeout=settings.LOBBY_WAITING_TIMEOUT,
         )
-        self._index_add(room_id, participant_id)
 
         return participant
 
@@ -333,31 +267,15 @@ class LobbyService:
             return None
 
     def list_waiting_participants(self, room_id: UUID) -> List[dict]:
-        """List all waiting participants for a room.
+        """List all waiting participants for a room."""
 
-        Reads the per-room index (O(participants of this room)) instead of
+        pattern = self._get_cache_key(room_id, "*")
-        scanning the shared keyspace. Indexed ids whose cache entry has
+        keys = list(cache.iter_keys(pattern, itersize=utils.CACHE_SCAN_ITERSIZE))
-        expired are pruned lazily here: the entry TTL is the liveness
-        protocol, so a missing entry means the participant is gone.
-        """
 
-        member_ids = self._index_members(room_id)
+        if not keys:
-
-        if not member_ids:
             return []
 
-        keys_by_id = {
+        data = cache.get_many(keys)
-            participant_id: self._get_cache_key(room_id, participant_id)
-            for participant_id in member_ids
-        }
-        data = cache.get_many(list(keys_by_id.values()))
-
-        dead_ids = [
-            participant_id
-            for participant_id, cache_key in keys_by_id.items()
-            if cache_key not in data
-        ]
-        self._index_remove(room_id, *dead_ids)
 
         waiting_participants = []
         for cache_key, raw_participant in data.items():
@@ -423,28 +341,16 @@ class LobbyService:
 
         participant.status = status
         cache.set(cache_key, participant.to_dict(), timeout=timeout)
-        self._index_touch(room_id)
 
     def clear_room_cache(self, room_id: UUID) -> None:
-        """Clear all participant entries from the cache for a specific room.
+        """Clear all participant entries from the cache for a specific room."""
 
-        Deletes the indexed participant entries and the index itself with
+        cache.delete_pattern(
-        targeted commands instead of a full-keyspace pattern scan.
+            self._get_cache_key(room_id, "*"), itersize=utils.CACHE_SCAN_ITERSIZE
-        """
+        )
-
-        member_ids = self._index_members(room_id)
-        if member_ids:
-            cache.delete_many(
-                [
-                    self._get_cache_key(room_id, participant_id)
-                    for participant_id in member_ids
-                ]
-            )
-        self._redis().delete(self._get_index_key(room_id))
 
     def clear_participant_cache(self, room_id: UUID, participant_id: str) -> None:
         """Clear a given participant entry from the cache for a specific room."""
 
         cache_key = self._get_cache_key(room_id, participant_id)
         cache.delete(cache_key)
-        self._index_remove(room_id, participant_id)

src/backend/core/services/presence.py

@@ -1,11 +1,25 @@
-"""Presence cache."""
+"""Presence cache.
+
+Redis-backed memo of "this identity is currently connected to this room".
+
+This module is intentionally a *pure cache store* with no dependency on other
+services, so that `participants_management` (which talks to LiveKit) can
+import it without creating an import cycle. The composition of "check cache,
+fall back to LiveKit" lives in
+`ParticipantsManagement.check_if_in_meeting_cached`.
+
+Only positive answers are stored: a sticky negative would lock out someone
+who joins right after a miss for the whole TTL. The TTL is a safety net in
+case an invalidation webhook is lost.
+"""
 
-from typing import List
 from uuid import UUID
 
 from django.conf import settings
 from django.core.cache import cache
 
+from core.utils import CACHE_SCAN_ITERSIZE
+
 
 class PresenceCache:
     """Store and invalidate (room, identity) presence entries."""
@@ -15,65 +29,24 @@ class PresenceCache:
         """Cache key for a (room, identity) presence entry."""
         return f"{settings.PRESENCE_KEY_PREFIX}_{room_id!s}_{identity}"
 
-    @staticmethod
-    def _get_index_key(room_id: UUID | str) -> str:
-        """Raw Redis key of the per-room identity index (a native SET).
-
-        Built through django-redis' make_key so it lives under the same
-        KEY_PREFIX/version namespace as the presence entries.
-        """
-        return cache.client.make_key(
-            f"{settings.PRESENCE_KEY_PREFIX}-index_{room_id!s}"
-        )
-
-    @staticmethod
-    def _redis(write: bool = True):
-        """Raw redis-py client.
-
-        SADD/SREM/SMEMBERS are not exposed by the Django cache API; this is
-        the documented django-redis escape hatch.
-        """
-        return cache.client.get_client(write=write)
-
-    def _index_members(self, room_id: UUID | str) -> List[str]:
-        """All identities currently indexed for the room."""
-        members = self._redis(write=False).smembers(self._get_index_key(room_id))
-        return [
-            member.decode() if isinstance(member, bytes) else member
-            for member in members
-        ]
-
     def is_marked_present(self, room_id: UUID | str, identity: str) -> bool:
         """Return True if a positive presence entry exists in cache."""
         return bool(cache.get(self._get_cache_key(room_id, identity)))
 
     def mark_present(self, room_id: UUID | str, identity: str) -> None:
-        """Record that `identity` is in `room_id` and index it for the room."""
+        """Record that `identity` is in `room_id`."""
         cache.set(
             self._get_cache_key(room_id, identity),
             True,
             timeout=settings.PRESENCE_CACHE_TIMEOUT,
         )
-        index_key = self._get_index_key(room_id)
-        pipe = self._redis().pipeline(transaction=False)
-        pipe.sadd(index_key, identity)
-        pipe.expire(index_key, settings.PRESENCE_CACHE_TIMEOUT)
-        pipe.execute()
 
     def clear(self, room_id: UUID | str, identity: str) -> None:
         """Forget presence for one participant (e.g. on participant_left)."""
         cache.delete(self._get_cache_key(room_id, identity))
-        self._redis().srem(self._get_index_key(room_id), identity)
 
     def clear_room(self, room_id: UUID | str) -> None:
-        """Forget presence for every participant of a room (on room_finished).
+        """Forget presence for every participant of a room (on room_finished)."""
-
+        cache.delete_pattern(
-        Deletes the indexed entries and the index itself with targeted
+            self._get_cache_key(room_id, "*"), itersize=CACHE_SCAN_ITERSIZE
-        commands instead of a full-keyspace pattern scan.
+        )
-        """
-        identities = self._index_members(room_id)
-        if identities:
-            cache.delete_many(
-                [self._get_cache_key(room_id, identity) for identity in identities]
-            )
-        self._redis().delete(self._get_index_key(room_id))

src/backend/core/tests/rooms/test_api_rooms_lobby.py

@@ -589,9 +589,6 @@ def test_list_waiting_participants_success(settings):
             "color": "#654321",
         },
     )
-    lobby_service = LobbyService()
-    lobby_service._index_add(room.id, "2f7f162f-e7d1-421b-90e7-02bfbfbf8def")
-    lobby_service._index_add(room.id, "f4ca3ab8a6c04ad88097b8da33f60f10")
 
     response = client.get(f"/api/v1.0/rooms/{room.id}/waiting-participants/")
 

src/backend/core/tests/services/test_lobby.py

@@ -2,7 +2,7 @@
 Test lobby service.
 """
 
-# pylint: disable=W0621,W0613, W0212, R0913, C0302
+# pylint: disable=W0621,W0613, W0212, R0913
 # ruff: noqa: PLR0913, PLR0917
 
 import uuid
@@ -24,6 +24,7 @@ from core.services.lobby import (
     LobbyParticipantStatus,
     LobbyService,
 )
+from core.services.presence import CACHE_SCAN_ITERSIZE
 from core.utils import NotificationError
 
 pytestmark = pytest.mark.django_db
@@ -465,22 +466,18 @@ def test_request_entry_participant_with_role(
 def test_refresh_waiting_status(mock_cache, lobby_service, participant_id):
     """Test refreshing waiting status for a participant."""
     lobby_service._get_cache_key = mock.Mock(return_value="mocked_cache_key")
-    lobby_service._index_touch = mock.Mock()
     room = RoomFactory(access_level=RoomAccessLevel.RESTRICTED)
     lobby_service.refresh_waiting_status(room.id, participant_id)
     mock_cache.touch.assert_called_once_with(
         "mocked_cache_key", settings.LOBBY_WAITING_TIMEOUT
     )
-    lobby_service._index_touch.assert_called_once_with(room.id)
 
 
 # pylint: disable=R0917
 @mock.patch("core.services.lobby.cache")
 @mock.patch("core.utils.generate_color")
 @mock.patch("core.utils.notify_participants")
-@mock.patch("core.services.lobby.LobbyService._index_add")
 def test_enter_success(
-    mock_index_add,
     mock_notify,
     mock_generate_color,
     mock_cache,
@@ -511,16 +508,13 @@ def test_enter_success(
     mock_notify.assert_called_once_with(
         room_name=str(room.pk), notification_data={"type": "participantWaiting"}
     )
-    mock_index_add.assert_called_once_with(room.id, participant_id)
 
 
 # pylint: disable=R0917
 @mock.patch("core.services.lobby.cache")
 @mock.patch("core.utils.generate_color")
 @mock.patch("core.utils.notify_participants")
-@mock.patch("core.services.lobby.LobbyService._index_add")
 def test_enter_with_notification_error(
-    mock_index_add,
     mock_notify,
     mock_generate_color,
     mock_cache,
@@ -547,7 +541,6 @@ def test_enter_with_notification_error(
         participant.to_dict(),
         timeout=settings.LOBBY_WAITING_TIMEOUT,
     )
-    mock_index_add.assert_called_once_with(room.id, participant_id)
 
 
 @mock.patch("core.services.lobby.cache")
@@ -586,15 +579,14 @@ def test_get_participant_parsing_error(
 @mock.patch("core.services.lobby.cache")
 def test_list_waiting_participants_empty(mock_cache, lobby_service):
     """Test listing waiting participants when none exist."""
-    room = RoomFactory(access_level=RoomAccessLevel.RESTRICTED)
+    mock_cache.iter_keys.return_value = []
-    lobby_service._index_members = mock.Mock(return_value=[])
-    lobby_service._index_remove = mock.Mock()
 
+    room = RoomFactory(access_level=RoomAccessLevel.RESTRICTED)
     result = lobby_service.list_waiting_participants(room.id)
 
     assert result == []
-    lobby_service._index_members.assert_called_once_with(room.id)
+    pattern = f"{settings.LOBBY_KEY_PREFIX}_{room.id!s}_*"
-    lobby_service._index_remove.assert_not_called()
+    mock_cache.iter_keys.assert_called_once_with(pattern, itersize=CACHE_SCAN_ITERSIZE)
     mock_cache.get_many.assert_not_called()
 
 
@@ -603,8 +595,7 @@ def test_list_waiting_participants(mock_cache, lobby_service, participant_dict):
     """Test listing waiting participants with valid data."""
     room = RoomFactory(access_level=RoomAccessLevel.RESTRICTED)
     cache_key = f"{settings.LOBBY_KEY_PREFIX}_{room.id!s}_participant1"
-    lobby_service._index_members = mock.Mock(return_value=["participant1"])
+    mock_cache.iter_keys.return_value = [cache_key]
-    lobby_service._index_remove = mock.Mock()
     mock_cache.get_many.return_value = {cache_key: participant_dict}
 
     result = lobby_service.list_waiting_participants(room.id)
@@ -612,8 +603,8 @@ def test_list_waiting_participants(mock_cache, lobby_service, participant_dict):
     assert len(result) == 1
     assert result[0]["status"] == "waiting"
     assert result[0]["username"] == "test-username"
-    lobby_service._index_members.assert_called_once_with(room.id)
+    pattern = f"{settings.LOBBY_KEY_PREFIX}_{room.id!s}_*"
-    lobby_service._index_remove.assert_called_once_with(room.id)
+    mock_cache.iter_keys.assert_called_once_with(pattern, itersize=CACHE_SCAN_ITERSIZE)
     mock_cache.get_many.assert_called_once_with([cache_key])
 
 
@@ -638,10 +629,7 @@ def test_list_waiting_participants_multiple(mock_cache, lobby_service):
         "color": "#654321",
     }
 
-    lobby_service._index_members = mock.Mock(
+    mock_cache.iter_keys.return_value = [cache_key1, cache_key2]
-        return_value=["participant1", "participant2"]
-    )
-    lobby_service._index_remove = mock.Mock()
     mock_cache.get_many.return_value = {
         cache_key1: participant1,
         cache_key2: participant2,
@@ -658,7 +646,8 @@ def test_list_waiting_participants_multiple(mock_cache, lobby_service):
     # Verify all participants have waiting status
     assert all(p["status"] == "waiting" for p in result)
 
-    lobby_service._index_members.assert_called_once_with(room.id)
+    pattern = f"{settings.LOBBY_KEY_PREFIX}_{room.id!s}_*"
+    mock_cache.iter_keys.assert_called_once_with(pattern, itersize=CACHE_SCAN_ITERSIZE)
     mock_cache.get_many.assert_called_once_with([cache_key1, cache_key2])
 
 
@@ -667,8 +656,7 @@ def test_list_waiting_participants_corrupted_data(mock_cache, lobby_service):
     """Test listing waiting participants with corrupted data."""
     room = RoomFactory(access_level=RoomAccessLevel.RESTRICTED)
     cache_key = f"{settings.LOBBY_KEY_PREFIX}_{room.id!s}_participant1"
-    lobby_service._index_members = mock.Mock(return_value=["participant1"])
+    mock_cache.iter_keys.return_value = [cache_key]
-    lobby_service._index_remove = mock.Mock()
     mock_cache.get_many.return_value = {cache_key: {"invalid": "data"}}
 
     result = lobby_service.list_waiting_participants(room.id)
@@ -693,10 +681,7 @@ def test_list_waiting_participants_partially_corrupted(mock_cache, lobby_service
 
     corrupted_participant = {"invalid": "data"}
 
-    lobby_service._index_members = mock.Mock(
+    mock_cache.iter_keys.return_value = [cache_key1, cache_key2]
-        return_value=["participant1", "participant2"]
-    )
-    lobby_service._index_remove = mock.Mock()
     mock_cache.get_many.return_value = {
         cache_key1: corrupted_participant,
         cache_key2: valid_participant,
@@ -714,6 +699,8 @@ def test_list_waiting_participants_partially_corrupted(mock_cache, lobby_service
     mock_cache.delete.assert_called_once_with(cache_key1)
 
     # Verify both cache keys were queried
+    pattern = f"{settings.LOBBY_KEY_PREFIX}_{room.id!s}_*"
+    mock_cache.iter_keys.assert_called_once_with(pattern, itersize=CACHE_SCAN_ITERSIZE)
     mock_cache.get_many.assert_called_once_with([cache_key1, cache_key2])
 
 
@@ -737,10 +724,7 @@ def test_list_waiting_participants_non_waiting(mock_cache, lobby_service):
         "color": "#654321",
     }
 
-    lobby_service._index_members = mock.Mock(
+    mock_cache.iter_keys.return_value = [cache_key1, cache_key2]
-        return_value=["participant1", "participant2"]
-    )
-    lobby_service._index_remove = mock.Mock()
     mock_cache.get_many.return_value = {
         cache_key1: participant1,
         cache_key2: participant2,
@@ -836,7 +820,6 @@ def test_update_participant_status_success(mock_cache, lobby_service, participan
 
     mock_cache.get.return_value = participant_dict
     lobby_service._get_cache_key = mock.Mock(return_value="mocked_cache_key")
-    lobby_service._index_touch = mock.Mock()
 
     lobby_service._update_participant_status(
         room.id,
@@ -854,7 +837,6 @@ def test_update_participant_status_success(mock_cache, lobby_service, participan
     mock_cache.set.assert_called_once_with(
         "mocked_cache_key", expected_data, timeout=60
     )
-    lobby_service._index_touch.assert_called_once_with(room.id)
     lobby_service._get_cache_key.assert_called_once_with(room.id, participant_id)
 
 
@@ -899,13 +881,9 @@ def test_clear_room_cache(settings, lobby_service):
         timeout=settings.LOBBY_DENIED_TIMEOUT,
     )
 
-    for participant_id in ("participant1", "participant2", "participant3"):
-        lobby_service._index_add(room_id, participant_id)
-
     lobby_service.clear_room_cache(room_id)
 
     assert cache.keys(f"test-lobby_{room_id!s}_*") == []
-    assert lobby_service._index_members(room_id) == []
 
 
 def test_clear_room_empty(settings, lobby_service):
@@ -932,13 +910,10 @@ def test_clear_participant_cache(lobby_service):
         "color": "#123456",
     }
     cache.set(cache_key, participant_data, timeout=settings.LOBBY_WAITING_TIMEOUT)
-    lobby_service._index_add(room_id, participant_id)
     assert cache.get(cache_key) is not None
-    assert participant_id in lobby_service._index_members(room_id)
 
     lobby_service.clear_participant_cache(room_id, participant_id)
     assert cache.get(cache_key) is None
-    assert participant_id not in lobby_service._index_members(room_id)
 
 
 def test_clear_participant_cache_nonexistent(lobby_service):
@@ -952,87 +927,3 @@ def test_clear_participant_cache_nonexistent(lobby_service):
     lobby_service.clear_participant_cache(room_id, participant_id)
 
     assert cache.get(cache_key) is None
-
-
-# Room index integration tests (real cache backend)
-
-
-def test_index_add_members_remove_roundtrip(lobby_service):
-    """The room index records, lists and forgets participant ids."""
-    room_id = uuid.uuid4()
-
-    assert lobby_service._index_members(room_id) == []
-
-    lobby_service._index_add(room_id, "participant1")
-    lobby_service._index_add(room_id, "participant2")
-
-    assert sorted(lobby_service._index_members(room_id)) == [
-        "participant1",
-        "participant2",
-    ]
-
-    # The index carries a backstop TTL so abandoned rooms cannot leak it.
-    ttl = lobby_service._redis().ttl(lobby_service._get_index_key(room_id))
-    assert 0 < ttl <= settings.LOBBY_ACCEPTED_TIMEOUT
-
-    lobby_service._index_remove(room_id, "participant1")
-    assert lobby_service._index_members(room_id) == ["participant2"]
-
-
-@mock.patch("core.utils.notify_participants")
-def test_enter_registers_participant_in_room_index(
-    mock_notify, lobby_service, participant_id, username
-):
-    """Entering the lobby must index the participant id for the room."""
-    room_id = uuid.uuid4()
-
-    lobby_service.enter(room_id, participant_id, username)
-
-    assert lobby_service._index_members(room_id) == [participant_id]
-
-
-def test_list_waiting_participants_prunes_stale_index_ids(settings, lobby_service):
-    """Indexed ids whose cache entry expired are pruned and not listed."""
-    settings.LOBBY_KEY_PREFIX = "test-lobby-prune"
-    room_id = uuid.uuid4()
-
-    cache.set(
-        f"test-lobby-prune_{room_id!s}_participant1",
-        {
-            "id": "participant1",
-            "username": "user1",
-            "status": "waiting",
-            "color": "#123456",
-        },
-        timeout=100,
-    )
-    lobby_service._index_add(room_id, "participant1")
-    # participant2 is indexed but its cache entry has expired.
-    lobby_service._index_add(room_id, "participant2")
-
-    result = lobby_service.list_waiting_participants(room_id)
-
-    assert [participant["id"] for participant in result] == ["participant1"]
-    assert lobby_service._index_members(room_id) == ["participant1"]
-
-
-def test_refresh_waiting_status_rearms_room_index_ttl(lobby_service, participant_id):
-    """A lone waiter's polling must keep the room index alive.
-
-    Regression test: the index backstop TTL is only armed at enter() time,
-    so a participant whose rolling WAITING refreshes outlast it would keep
-    their entry alive while silently vanishing from the moderator list.
-    Refreshing the waiting status must therefore re-arm the index TTL.
-    """
-    room_id = uuid.uuid4()
-    lobby_service._index_add(room_id, participant_id)
-
-    index_key = lobby_service._get_index_key(room_id)
-    redis_client = lobby_service._redis()
-    redis_client.expire(index_key, 10)
-    assert redis_client.ttl(index_key) <= 10
-
-    lobby_service.refresh_waiting_status(room_id, participant_id)
-
-    assert redis_client.ttl(index_key) > 10
-    assert lobby_service._index_members(room_id) == [participant_id]

src/backend/core/tests/services/test_presence.py

@@ -90,18 +90,19 @@ def test_presence_clear_and_clear_room():
     assert presence.is_marked_present(other_room, "a") is True
 
 
-def test_presence_clear_room_removes_many_entries_and_the_index():
+def test_presence_clear_room_scans_in_pages():
-    """clear_room removes every entry of the room through the index — never
+    """clear_room removes every match, even across several SCAN pages,
-    a keyspace scan — and leaves other rooms untouched."""
+    and only within the room."""
     room_id, other_room = str(uuid4()), str(uuid4())
     presence = PresenceCache()
     for i in range(7):
         presence.mark_present(room_id, f"user-{i}")
     presence.mark_present(other_room, "user-0")
 
-    presence.clear_room(room_id)
+    # An itersize smaller than the match count forces delete_pattern to
+    # page through several SCAN cursors rather than finish in one pass.
+    with mock.patch("core.utils.CACHE_SCAN_ITERSIZE", 3):
+        presence.clear_room(room_id)
 
     assert all(not presence.is_marked_present(room_id, f"user-{i}") for i in range(7))
     assert presence.is_marked_present(other_room, "user-0") is True
-    assert presence._index_members(room_id) == []
-    assert presence._index_members(other_room) == ["user-0"]

src/backend/core/utils.py

@@ -499,3 +499,6 @@ def build_telephony_config():
         "default_country": country,
         "international_phone_number": international,
     }
+
+
+CACHE_SCAN_ITERSIZE = 500

src/backend/meet/settings.py

@@ -865,7 +865,7 @@ class Base(Configuration):
         "room_lobby", environ_name="LOBBY_KEY_PREFIX", environ_prefix=None
     )
     LOBBY_WAITING_TIMEOUT = values.PositiveIntegerValue(
-        6, environ_name="LOBBY_WAITING_TIMEOUT", environ_prefix=None
+        3, environ_name="LOBBY_WAITING_TIMEOUT", environ_prefix=None
     )
     LOBBY_DENIED_TIMEOUT = values.PositiveIntegerValue(
         5, environ_name="LOBBY_DENIED_TIMEOUT", environ_prefix=None

src/frontend/src/components/Avatar.tsx

@@ -1,5 +1,5 @@
 import { css, cva, RecipeVariantProps } from '@/styled-system/css'
-import React, { useMemo } from 'react'
+import React, { useLayoutEffect, useMemo } from 'react'
 
 const avatar = cva({
   base: {
@@ -28,17 +28,24 @@ const avatar = cva({
   },
 })
 
+// Instantiating a segmenter is expensive; create it once and reuse it.
 const graphemeSegmenter =
   typeof Intl !== 'undefined' && 'Segmenter' in Intl
     ? new Intl.Segmenter(undefined, { granularity: 'grapheme' })
     : undefined
 
+/**
+ * Returns the first user-perceived character. Some Unicode characters span
+ * multiple UTF-16 code units, so a naive index into the string can split them
+ * and yield a broken glyph.
+ */
 const getFirstGrapheme = (value: string): string => {
   if (!value) return ''
   if (graphemeSegmenter) {
     const [first] = graphemeSegmenter.segment(value)
     return first?.segment ?? ''
   }
+  // Fallback: keeps single code points intact (including surrogate pairs).
   return Array.from(value)[0] ?? ''
 }
 
@@ -59,6 +66,36 @@ export type AvatarProps = React.HTMLAttributes<HTMLDivElement> & {
 export const Avatar = React.memo(
   ({ name, bgColor, context, notification, style, ...props }: AvatarProps) => {
     const initials = useMemo(() => getInitials(name), [name])
+    const textRef = React.useRef<SVGTextElement>(null)
+    const [offsetY, setOffsetY] = React.useState(0)
+
+    // Optically center the initials: measure the ink bounding box of the
+    // rendered glyphs and shift them so the box's center sits at the middle
+    // of the viewBox. Works for any font, weight or glyph shape, unlike a
+    // hand-tuned dy offset. getBBox() is in local (pre-transform)
+    // coordinates, so applying the translation never changes the measure.
+    useLayoutEffect(() => {
+      const text = textRef.current
+      if (!text) return
+
+      const center = () => {
+        const box = text.getBBox()
+        // A hidden element measures as an empty box; keep the default then.
+        if (box.height === 0) return
+        setOffsetY(50 - (box.y + box.height / 2))
+      }
+
+      center()
+      // Glyph metrics can change once webfonts finish loading.
+      let cancelled = false
+      document.fonts?.ready.then(() => {
+        if (!cancelled) center()
+      })
+      return () => {
+        cancelled = true
+      }
+    }, [initials])
+
     return (
       <div
         style={{ backgroundColor: bgColor, ...style }}
@@ -71,16 +108,15 @@ export const Avatar = React.memo(
           className={css({ width: '100%', height: '100%', display: 'block' })}
         >
           <text
+            ref={textRef}
             x="50"
-            y={50}
+            y="50"
+            transform={`translate(0 ${offsetY})`}
             textAnchor="middle"
+            dominantBaseline="central"
             fontSize="52"
             fontWeight="500"
             fill="currentColor"
-            className={css({
-              transform:
-                'translateY(calc(var(--avatar-cap-height, 0.7) * 0.5em))',
-            })}
           >
             {initials}
           </text>

src/frontend/src/features/auth/api/fetchUser.ts

@@ -18,7 +18,7 @@ export const fetchUser = (
   }
 ): Promise<ApiUser | false> => {
   return new Promise((resolve, reject) => {
-    fetchApi<ApiUser>('/users/me/')
+    fetchApi<ApiUser>('/users/me')
       .then(resolve)
       .catch((error) => {
         // we assume that a 401 means the user is not logged in

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

@@ -1,6 +1,5 @@
 import { ApiError } from '@/api/ApiError'
 import { fetchApi } from '@/api/fetchApi'
-import { captureEvent } from '@/features/analytics/telemetry'
 import { useMutation, type UseMutationOptions } from '@tanstack/react-query'
 
 export interface EnterRoomParams {
@@ -18,23 +17,13 @@ export const enterRoom = async ({
   allowEntry,
   participantId,
 }: EnterRoomParams): Promise<EnterRoomResponse> => {
-  try {
+  return await fetchApi<EnterRoomResponse>(`/rooms/${roomId}/enter/`, {
-    return await fetchApi<EnterRoomResponse>(`/rooms/${roomId}/enter/`, {
+    method: 'POST',
-      method: 'POST',
+    body: JSON.stringify({
-      body: JSON.stringify({
+      participant_id: participantId,
-        participant_id: participantId,
+      allow_entry: allowEntry,
-        allow_entry: allowEntry,
+    }),
-      }),
+  })
-    })
-  } catch (error) {
-    if (error instanceof ApiError && error.statusCode === 404) {
-      captureEvent('lobby_entry_participant_gone', {
-        room_id: roomId,
-        allow_entry: allowEntry,
-      })
-    }
-    throw error
-  }
 }
 
 export function useEnterRoom(

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

@@ -12,8 +12,8 @@ import { keys } from '@/api/queryKeys'
 import { queryClient } from '@/api/queryClient'
 import { ApiError } from '@/api/ApiError'
 
-export const POLL_INTERVAL_MS = 4_000
+export const POLL_INTERVAL_MS = 1000
-export const LAZY_POLL_INTERVAL_MS = 15_000
+export const LAZY_POLL_INTERVAL_MS = 10_000
 
 export const LobbyProvider = () => {
   const room = useRoomContext()

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

@@ -8,7 +8,7 @@ import {
 } from '../api/requestEntry'
 
 export const WAIT_TIMEOUT_MS = 600000 // 10 minutes
-export const POLL_INTERVAL_MS = 3_000
+export const POLL_INTERVAL_MS = 1000
 
 export const useLobby = ({
   roomId,

src/frontend/src/features/rooms/routes/Feedback.tsx

@@ -65,7 +65,7 @@ const FeedbackRoute = () => {
           <Stack
             direction={{ base: 'column', xsm: 'row' }}
             width={{ base: '100%', xsm: 'auto' }}
-            maxWidth="380px"
+            maxWidth="410px"
           >
             {showBackButton && (
               <Button

src/frontend/src/layout/Header.tsx

@@ -35,21 +35,30 @@ const LoginHint = () => {
     <div
       className={css({
         position: 'absolute',
-        top: 'calc(100% + 12px)',
+        top: '103px',
-        right: 0,
+        right: '110px',
         zIndex: '100',
         outline: 'none',
         padding: '1.25rem',
-        width: 'max-content',
+        maxWidth: '350px',
-        maxWidth: 'min(350px, calc(100vw - 2rem))',
         boxShadow: '0 2px 5px rgba(0 0 0 / 0.1)',
         borderRadius: '1rem',
         backgroundColor: 'primary.200',
+        display: 'none',
+        xsm: {
+          display: 'block',
+        },
+        sm: {
+          top: '131px',
+          right: '100px',
+          zIndex: '100',
+        },
         _after: {
           content: '""',
           position: 'absolute',
           top: '-10px',
-          right: '1.5rem',
+          right: '20%',
+          marginLeft: '-10px',
           borderWidth: '0 10px 10px 10px',
           borderStyle: 'solid',
           borderColor: 'transparent transparent #E3E3FB transparent',
@@ -162,13 +171,12 @@ export const Header = () => {
                   <>
                     <div
                       className={css({
-                        position: 'relative',
                         display: { base: 'none', xsm: 'block' },
                       })}
                     >
                       <LoginButton proConnectHint={false} />
-                      <LoginHint />
                     </div>
+                    <LoginHint />
                   </>
                 )}
               {!!user && (

src/frontend/src/styles/index.css

@@ -6,10 +6,6 @@ body,
   height: 100%;
 }
 
-:root {
-  --avatar-cap-height: 0.7;
-}
-
 html.font-lexend {
   --fonts-sans: 'Lexend Variable', ui-sans-serif, system-ui, sans-serif;
 }