Fix null token in session: refresh on mount if token missing

If localStorage session has user but no token (corrupted/migrated session),
attempt a token refresh via httpOnly cookie. If refresh fails, clear session
and force re-login. Prevents WebSocket 'missing token' skip.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/contexts/AuthContext.tsx

@@ -1,7 +1,9 @@
-import { createContext, useContext, useState } from 'react'
+import { createContext, useContext, useEffect, useState } from 'react'
 import type { User, AuthSession } from '../types'
 import { api, ApiError } from '../lib/api'
 
+const BASE = (import.meta.env.VITE_API_URL as string | undefined) ?? 'https://api.hotelsync.ru'
+
 interface AuthContextValue {
   session: AuthSession | null
   user: User | null
@@ -11,11 +13,45 @@ interface AuthContextValue {
 
 const AuthContext = createContext<AuthContextValue | null>(null)
 
-export function AuthProvider({ children }: { children: React.ReactNode }) {
-  const [session, setSession] = useState<AuthSession | null>(() => {
+function loadSession(): AuthSession | null {
+  try {
     const stored = localStorage.getItem('hotelsync-session')
-    return stored ? JSON.parse(stored) : null
-  })
+    if (!stored) return null
+    const parsed = JSON.parse(stored) as AuthSession
+    // If session is missing token — discard it, we'll refresh below
+    if (!parsed?.user) { localStorage.removeItem('hotelsync-session'); return null }
+    return parsed
+  } catch {
+    localStorage.removeItem('hotelsync-session')
+    return null
+  }
+}
+
+export function AuthProvider({ children }: { children: React.ReactNode }) {
+  const [session, setSession] = useState<AuthSession | null>(loadSession)
+
+  // On mount: if session exists but token is missing/null, try to refresh via cookie
+  useEffect(() => {
+    if (!session) return
+    if (session.token) return // token present, all good
+
+    fetch(`${BASE}/api/auth/refresh`, { method: 'POST', credentials: 'include' })
+      .then(r => r.ok ? r.json() : null)
+      .then((data: { access_token?: string } | null) => {
+        if (data?.access_token) {
+          const s: AuthSession = { ...session, token: data.access_token }
+          setSession(s)
+          localStorage.setItem('hotelsync-session', JSON.stringify(s))
+        } else {
+          setSession(null)
+          localStorage.removeItem('hotelsync-session')
+        }
+      })
+      .catch(() => {
+        setSession(null)
+        localStorage.removeItem('hotelsync-session')
+      })
+  }, []) // eslint-disable-line react-hooks/exhaustive-deps
 
   const login = async (email: string, password: string): Promise<User | null> => {
     try {