feat(analytics): account commission and investment transfers

Handle cashback commission imports, include commissions in analytics with separate investment metrics, and expose commission/version details in the UI.

Made-with: Cursor

frontend/src/context/AuthContext.tsx

@@ -10,7 +10,7 @@ import { getMe, login as apiLogin, logout as apiLogout } from '../api/auth';
 import { setOnUnauthorized } from '../api/client';
 
 interface AuthState {
-  user: { login: string } | null;
+  user: { login: string; backendVersion: string } | null;
   loading: boolean;
   error: string | null;
   login: (username: string, password: string) => Promise<void>;
@@ -20,7 +20,7 @@ interface AuthState {
 const AuthContext = createContext<AuthState | null>(null);
 
 export function AuthProvider({ children }: { children: ReactNode }) {
-  const [user, setUser] = useState<{ login: string } | null>(null);
+  const [user, setUser] = useState<{ login: string; backendVersion: string } | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
 
@@ -31,7 +31,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
   useEffect(() => {
     setOnUnauthorized(clearUser);
     getMe()
-      .then((me) => setUser({ login: me.login }))
+      .then((me) => setUser({ login: me.login, backendVersion: me.backendVersion }))
       .catch(() => setUser(null))
       .finally(() => setLoading(false));
   }, [clearUser]);
@@ -41,7 +41,7 @@ export function AuthProvider({ children }: { children: ReactNode }) {
     try {
       await apiLogin({ login: username, password });
       const me = await getMe();
-      setUser({ login: me.login });
+      setUser({ login: me.login, backendVersion: me.backendVersion });
     } catch (e: unknown) {
       const msg = e instanceof Error && e.message === 'Failed to fetch'
         ? 'Сервер недоступен. Проверьте, что backend запущен и NPM проксирует /api на порт 3000.'