fix(server): inject HostProcessPlatform into the Grok plan extractor

The plan.md path check read process.platform and process.env directly; thread
the host platform reference and the adapter's provider environment through
GrokAdapterV2Options instead.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
29bbe2ef7cJulius Marminge committed on 9/21/2026, 5:31:35 AMparent6a51e29
2 files changedLine totals unavailable