fix: Bearer 토큰 인증으로 전환 — 쿠키 프록시 이슈 해결

Caddy 프록시를 거치면서 httpOnly 쿠키가 제대로 전달 안 되는 문제.
로그인 시 받은 토큰을 메모리에 저장하고 Authorization: Bearer 헤더로
전송하는 방식으로 변경. 쿠키 의존성 제거.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

hub-web/src/lib/api.ts

@@ -1,27 +1,43 @@
 const BASE = '';
 
+// Store token in memory for Bearer auth (more reliable than cookies through proxies)
+let _token: string | null = null;
+
+export function setToken(token: string | null) {
+  _token = token;
+}
+
+function authHeaders(): Record<string, string> {
+  const h: Record<string, string> = { 'Content-Type': 'application/json' };
+  if (_token) h['Authorization'] = `Bearer ${_token}`;
+  return h;
+}
+
 export async function login(password: string): Promise<{ role: string; token: string }> {
   const res = await fetch(`${BASE}/auth/login`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
-    credentials: 'include',
     body: JSON.stringify({ password }),
   });
   if (!res.ok) {
     const err = await res.json().catch(() => null);
     throw new Error(err?.error?.message || 'Login failed');
   }
-  return res.json();
+  const data = await res.json();
+  _token = data.token;
+  return data;
 }
 
 export async function getMe(): Promise<{ role: string } | null> {
-  const res = await fetch(`${BASE}/auth/me`, { credentials: 'include' });
-  if (!res.ok) return null;
+  if (!_token) return null;
+  const res = await fetch(`${BASE}/auth/me`, { headers: authHeaders() });
+  if (!res.ok) { _token = null; return null; }
   return res.json();
 }
 
 export async function logout(): Promise<void> {
-  await fetch(`${BASE}/auth/logout`, { method: 'POST', credentials: 'include' });
+  await fetch(`${BASE}/auth/logout`, { method: 'POST', headers: authHeaders() });
+  _token = null;
 }
 
 export interface Model {
@@ -33,7 +49,7 @@ export interface Model {
 }
 
 export async function getModels(): Promise<Model[]> {
-  const res = await fetch(`${BASE}/v1/models`, { credentials: 'include' });
+  const res = await fetch(`${BASE}/v1/models`, { headers: authHeaders() });
   if (!res.ok) return [];
   const data = await res.json();
   return data.data || [];
@@ -73,8 +89,7 @@ export async function* streamChat(
 ): AsyncGenerator<string, void> {
   const res = await fetch(`${BASE}/v1/chat/completions`, {
     method: 'POST',
-    headers: { 'Content-Type': 'application/json' },
-    credentials: 'include',
+    headers: authHeaders(),
     body: JSON.stringify({ model, messages, stream: true }),
   });