Fix interceptor auth injection binding

src/shared/opencode-server-auth.ts

@@ -78,7 +78,7 @@ function tryInjectViaInterceptors(internal: UnknownRecord, auth: string): boolea
     return false
   }
 
-  requestInterceptors.use((request: Request): Request => {
+  use.call(requestInterceptors, (request: Request): Request => {
     if (!request.headers.get("Authorization")) {
       request.headers.set("Authorization", auth)
     }