fix(llm): restore OpenAI reasoning streams (#28552)

packages/llm/test/recorded-golden.ts

@@ -1,5 +1,5 @@
 import type { HttpRecorder } from "@opencode-ai/http-recorder"
-import { describe, type TestOptions } from "bun:test"
+import { describe } from "bun:test"
 import { Effect } from "effect"
 import type { Model } from "../src"
 import { goldenScenarioTags, runGoldenScenario, type GoldenScenarioID } from "./recorded-scenarios"
@@ -17,7 +17,7 @@ type ScenarioInput =
       readonly tags?: ReadonlyArray<string>
       readonly maxTokens?: number
       readonly temperature?: number | false
-      readonly timeout?: number | TestOptions
+      readonly timeout?: number
     }
 
 type TargetInput = {
@@ -38,6 +38,7 @@ const scenarioInput = (input: ScenarioInput) => (typeof input === "string" ? { i
 const scenarioTitle = (id: GoldenScenarioID) => {
   if (id === "text") return "streams text"
   if (id === "tool-call") return "streams tool call"
+  if (id === "reasoning") return "uses reasoning"
   if (id === "image") return "reads image text"
   return "drives a tool loop"
 }