⚡️(frontend) increase lobby polling interval on both sides

Increase the polling interval used by the lobby feature, on both the
waiting participant side and the moderator side.

The goal is to reduce the volume of requests the lobby generates,
trading a bit of data freshness for better performance.

It will de facto reduce pressure on the backend.

We will observe the impact in production, and revisit these
intervals if the delays turn out to be too aggressive.

CHANGELOG.md

@@ -26,6 +26,7 @@ and this project adheres to
 - 🐛(frontend) restore automatic lower-hand on speaking
 - 🐛(frontend) center Avatar initials with a font-aware cap-height ratio
 - 🐛(frontend) keep feedback buttons on one line for fr/es/en
+- ⚡️(frontend) increase lobby polling interval on both sides
 
 ## [1.30.0] - 2026-09-01
 

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(
-        3, environ_name="LOBBY_WAITING_TIMEOUT", environ_prefix=None
+        6, 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/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 = 1000
-export const LAZY_POLL_INTERVAL_MS = 10_000
+export const POLL_INTERVAL_MS = 4_000
+export const LAZY_POLL_INTERVAL_MS = 15_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 = 1000
+export const POLL_INTERVAL_MS = 3_000
 
 export const useLobby = ({
   roomId,