poe-code/agent: AgentRunOptions.env missing from published 3.0.393 types

[kamilio]

Summary

poe-code@3.0.393 runtime still forwards composable AgentRunOptions.env, but the published poe-code/agent TypeScript declaration omits the env property. This regresses the public contract released for #404 in 3.0.256.

Evidence

Runtime (dist/agent.js) forwards:

env: options.env

Published declaration (dist/agent.d.ts) currently defines AgentRunOptions without env.

Impact

Consumers cannot use the released per-run composable-agent environment API without a cast, module augmentation, or other local workaround. In quora/bug-analyzer, this blocks removal of serialized temporary global process.env mutation tracked by issue #24.

Requested fix

• Restore env?: Record<string, string | undefined> to the public AgentRunOptions declaration/source type.
• Add a packaging/type-surface regression test proving the published poe-code/agent declaration accepts per-run environment overrides, including undefined unsets.