login timeout issue fix

src/app/layout.tsx

@@ -3,6 +3,7 @@ import {cookies} from 'next/headers';
 import {Sora, Inter} from 'next/font/google';
 import './globals.css';
 import {getServerSession} from '@/features/auth/services/serverSession';
+import {tabSessionScript} from '@/features/auth/services/tabSession';
 import {
   htmlThemeAttr,
   parseThemeMode,
@@ -105,6 +106,16 @@ export default async function RootLayout({
       suppressHydrationWarning
     >
       <body>
+        {/*
+          FIRST child of <body>, and that position is the whole point: it runs
+          before the markup below it is parsed, so a tab that inherited the
+          cookies without owning the session never paints the workspace. An
+          effect inside Providers would run after the first paint instead.
+          See services/tabSession.ts for what it does and why it fails open.
+        */}
+        <script
+          dangerouslySetInnerHTML={{__html: tabSessionScript(session !== null)}}
+        />
         <Providers initialSession={session} initialThemeMode={themeMode}>
           {children}
         </Providers>