chore: proper client extraction (#6996)

codex-rs/codex-api/src/auth.rs

@@ -0,0 +1,27 @@
+use codex_client::Request;
+
+/// Provides bearer and account identity information for API requests.
+///
+/// Implementations should be cheap and non-blocking; any asynchronous
+/// refresh or I/O should be handled by higher layers before requests
+/// reach this interface.
+pub trait AuthProvider: Send + Sync {
+    fn bearer_token(&self) -> Option<String>;
+    fn account_id(&self) -> Option<String> {
+        None
+    }
+}
+
+pub(crate) fn add_auth_headers<A: AuthProvider>(auth: &A, mut req: Request) -> Request {
+    if let Some(token) = auth.bearer_token()
+        && let Ok(header) = format!("Bearer {token}").parse()
+    {
+        let _ = req.headers.insert(http::header::AUTHORIZATION, header);
+    }
+    if let Some(account_id) = auth.account_id()
+        && let Ok(header) = account_id.parse()
+    {
+        let _ = req.headers.insert("ChatGPT-Account-ID", header);
+    }
+    req
+}