🔧(backend) add backend toggle for silent login feature

Implement configuration option in backend to enable or disable silent login
functionality. Provides flexibility to control this authentication behavior
through server settings.

Requested by user self-hosting the project. Not all OIDC provider support
prompt=none param.

src/backend/meet/settings.py

@@ -307,6 +307,9 @@ class Base(Configuration):
         "silence_livekit_debug_logs": values.BooleanValue(
             False, environ_name="FRONTEND_SILENCE_LIVEKIT_DEBUG", environ_prefix=None
         ),
+        "is_silent_login_enabled": values.BooleanValue(
+            True, environ_name="FRONTEND_IS_SILENT_LOGING_ENABLED", environ_prefix=None
+        ),
     }
 
     # Mail

src/frontend/src/api/useConfig.ts

@@ -12,6 +12,7 @@ export interface ApiConfig {
     id: string
   }
   silence_livekit_debug_logs?: boolean
+  is_silent_login_enabled?: boolean
   recording?: {
     is_enabled?: boolean
     available_modes?: RecordingMode[]

src/frontend/src/features/auth/api/useUser.tsx

@@ -2,7 +2,7 @@ import { useQuery } from '@tanstack/react-query'
 import { keys } from '@/api/queryKeys'
 import { fetchUser } from './fetchUser'
 import { type ApiUser } from './ApiUser'
-import { useEffect } from 'react'
+import { useEffect, useMemo } from 'react'
 import {
   startAnalyticsSession,
   terminateAnalyticsSession,
@@ -12,6 +12,7 @@ import {
   terminateSupportSession,
 } from '@/features/support/hooks/useSupport'
 import { logoutUrl } from '../utils/logoutUrl'
+import { useConfig } from '@/api/useConfig'
 
 /**
  * returns info about currently logged-in user
@@ -23,11 +24,24 @@ export const useUser = (
     fetchUserOptions?: Parameters<typeof fetchUser>[0]
   } = {}
 ) => {
+  const { data, isLoading } = useConfig()
+
+  const options = useMemo(() => {
+    if (!data || data?.is_silent_login_enabled !== true) {
+      return {
+        ...opts,
+        attemptSilent: false,
+      }
+    }
+    return opts.fetchUserOptions
+  }, [data, opts])
+
   const query = useQuery({
     // eslint-disable-next-line @tanstack/query/exhaustive-deps
     queryKey: [keys.user],
-    queryFn: () => fetchUser(opts.fetchUserOptions),
+    queryFn: () => fetchUser(options),
     staleTime: Infinity,
+    enabled: !isLoading,
   })
 
   useEffect(() => {