feat: add pause and resume buttons to sandbox detail controls

[devin-ai-integration]

Summary

Adds Pause and Resume buttons to the sandbox detail page controls, alongside the existing Kill button.

• Pause button appears when sandbox is running — calls POST /sandboxes/{sandboxID}/pause
• Resume button appears when sandbox is paused — calls POST /sandboxes/{sandboxID}/connect (the non-deprecated resume path)
• Kill button remains always visible (disabled when already killed)
• New PlayIcon SVG added to the icons library
• Two new server actions: pauseSandboxAction and resumeSandboxAction

Neither pause nor resume has a confirmation dialog since both are non-destructive/reversible.

Review & Testing Checklist for Human

• Hardcoded resume timeout: Resume sends timeout: 60 seconds. Verify this is the desired default, or whether it should match the sandbox's original timeout / be user-configurable.
• Test pause → resume flow end-to-end: Start a sandbox, click Pause, verify state transitions to paused and the Resume button appears. Click Resume, verify the sandbox returns to running state.
• PlayIcon visual check: Confirm the new play triangle icon renders correctly and matches the style/weight of the existing PausedIcon.
• Edge case: rapid clicking: Buttons are disabled while executing, but verify no double-fire issues with fast clicks.

Notes

• Resume uses /sandboxes/{sandboxID}/connect instead of the deprecated /sandboxes/{sandboxID}/resume endpoint. The connect endpoint also handles already-running sandboxes gracefully (200 vs 201).
• Pause button has no confirmation dialog — this is intentional since pause is reversible. If a confirm dialog is desired, it can be added as a follow-up.

Link to Devin session: https://app.devin.ai/sessions/8de13379471347a09ce69176acd52c24
Requested by: @mlejva

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[devin-ai-integration]

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Avoid forcing a 60s TTL on resume

The resume handler always sends timeout: 60, which makes every resumed sandbox expire after roughly one minute from the resume call instead of preserving its previous/session timeout. Because /sandboxes/{sandboxID}/connect treats timeout as the new expiry window from now, users resuming long-lived sandboxes can have them terminated almost immediately after resuming, which is a functional regression in normal pause→resume workflows.

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional findings.