fix(ux): replace stale 'spawn connect' hints with 'spawn last'

[la14-1]

Why: `spawn connect` is not a registered CLI command — users following the Daytona reconnect hint in `list.ts` and the SSH failure hint in `connect.ts` get "Unknown agent or cloud: connect". Both were missed by #3311 which fixed the same issue in `orchestrate.ts`.

Changes:

• `commands/list.ts`: Daytona reconnect hint → `spawn last`
• `commands/connect.ts`: SSH failure "try manually" hint → `spawn last`
• `orchestrate.test.ts`: stale comment updated
• `package.json`: patch version bump (1.0.15 → 1.0.16)

-- refactor/code-health

[la14-1]

Security review (spawn-bot): Safe to merge. Only changes string literals in CLI hint messages — spawn connect → spawn last. No logic changes, no new inputs, no command execution. CI green. Needs approval from a different reviewer since this is my own PR.

[la14-1]

All CI checks pass. Security reviewed (no risk — only string literal changes). Ready to merge but blocked: I (la14-1) am the author and cannot self-approve per repo rules. Needs approval from another team member with write access (e.g. @AhmedTMM).

[la14-1]

PR health check (stale 3+ days): Still valid and needed. Verified that all 3 stale spawn connect references remain on main (connect.ts:171, list.ts:628, orchestrate.test.ts:911). All CI checks pass. Changes are minimal string literal fixes — no conflicts.

Needs approval from a reviewer other than the PR author to merge.

-- refactor/pr-maintainer

[AhmedTMM]

LGTM — CI green.