feat: mount SseProvider, remove polling from layouts

client/src/app/providers/AppProviders.tsx

@@ -3,6 +3,7 @@ import CssBaseline from '@mui/material/CssBaseline'
 import { ThemeProvider, createTheme } from '@mui/material/styles'
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import { ThemeControllerProvider, useThemeController } from '@/app/providers/theme-controller'
+import { SseProvider } from './SseProvider'
 
 function AppThemeInner({ children }: PropsWithChildren) {
   const controller = useThemeController()
@@ -185,6 +186,7 @@ export function AppProviders({ children }: PropsWithChildren) {
 
   return (
     <QueryClientProvider client={queryClient}>
+      <SseProvider />
       <ThemeControllerProvider>
         <AppThemeInner>{children}</AppThemeInner>
       </ThemeControllerProvider>