Login: drop AuthProvider dependency so /login exports statically

apps/web/src/app/login/page.tsx

@@ -4,14 +4,14 @@ import { useState, type FormEvent } from "react";
 import Link from "next/link";
 import { Button, Card, Input } from "../../components/ui/primitives";
 import { api, errorMessage } from "../../lib/api-client";
-import { useAuth } from "../../lib/auth-store";
+import { setSessionToken } from "../../lib/session-token";
+import type { AuthResult } from "../../lib/api-types";
 
 /**
  * /login — bare sign-in: username and password, nothing else. Account creation
  * lives at /signup; collective joining happens with an invite link.
  */
 export default function LoginPage(): React.ReactElement {
-  const { login } = useAuth();
   const [username, setUsername] = useState("");
   const [password, setPassword] = useState("");
   const [busy, setBusy] = useState(false);
@@ -22,7 +22,12 @@ export default function LoginPage(): React.ReactElement {
     setBusy(true);
     setError(null);
     try {
-      await api.post<unknown>("/auth/login", { username: username.trim(), password }, { redirectOn401: false });
+      const result = await api.post<AuthResult>(
+        "/auth/login",
+        { username: username.trim(), password },
+        { redirectOn401: false },
+      );
+      setSessionToken(result.token);
       window.location.assign("/streams");
     } catch (err) {
       setError(errorMessage(err));