fix: gets the alias for paused templates on GetSandboxesSandboxID

[matthewlouisbrockman]

For GetSandboxesSandboxID, returns the alias as well as the correct template id

Related to https://linear.app/e2b/issue/ENG-3740/dashboard-template-id-is-not-always-accurate

[cursor]

PR Summary

Low Risk
Low risk bugfix that only adjusts the paused-sandbox detail response to populate Alias and updates integration tests to assert it; behavior for running sandboxes is unchanged.

Overview
Fixes GetSandboxesSandboxID so paused sandbox detail responses (served from the latest snapshot) also populate Alias by taking the first snapshot alias, and updates integration tests to assert Alias is present and correct for both running and paused sandboxes.

^{Written by Cursor Bugbot for commit bf193a9. This will update automatically on new commits. Configure here.}

[claude]

LGTM — the paused-path alias fix is correct and the nil guard mirrors good practice.

Extended reasoning...

Overview

This PR modifies GetSandboxesSandboxID in sandbox_get.go to populate the Alias field when returning a paused sandbox from the snapshot cache path. It also adds alias assertions to two integration tests (TestSandboxDetailRunning, TestSandboxDetailPaused).

Security risks

None. The change only adds read-only response shaping — no auth, permissions, or data mutation logic is affected.

Level of scrutiny

Low. The change is a two-line addition to a response-building block, following the same firstAlias helper already used elsewhere in the codebase. The nil guard (if pausedAlias != "") is the correct pattern and consistent with how optional string fields are handled in Go JSON serialization with omitempty.

Other factors

The inline bug comments cover a test-robustness nit (hardcoded "base" string) and a pre-existing asymmetry in the running-path alias handling — neither is introduced by this PR. The fix is self-contained, the test coverage is exercised in both running and paused states, and there are no outstanding reviewer comments.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

[ben-fornefeld]

lgtm

[linear]

ENG-3740 dashboard template ID is not always accurate