fix(cli): don't crash auth login when no browser opener is available (#56082)

Co-authored-by: thdxr <thdxr@users.noreply.github.com>

Author: opencode-agent[bot]

packages/cli/src/ui/prompt.ts

@@ -17,7 +17,8 @@ export function requireInteractive(message: string) {
 
 export const openUrl = Effect.fn("cli.prompt.open-url")(function* (url: string) {
   const browser = yield* Effect.promise(() => import("@opencode/util/open"))
-  yield* Effect.promise(() => browser.openUrl(url)).pipe(Effect.ignore)
+  // Best effort: headless environments may lack a browser opener, and the caller already printed the URL.
+  yield* Effect.tryPromise(() => browser.openUrl(url)).pipe(Effect.ignore)
 })
 
 export function handlePromptErrors<A, E, R>(effect: Effect.Effect<A, E, R>) {

packages/cli/test/prompt-open-url.test.ts

@@ -0,0 +1,8 @@
+import { expect, test } from "bun:test"
+import { Effect, Exit } from "effect"
+import { openUrl } from "../src/ui/prompt"
+
+test("suppresses browser open failures so the printed URL stays usable", async () => {
+  const exit = await Effect.runPromiseExit(openUrl("not-a-browser-url"))
+  expect(Exit.isSuccess(exit)).toBe(true)
+})