Cline desktop 0.0.27 names root causes instead of symptoms.

The release notes explain that signing out didn't stick because the runtime re-imports missing providers from the classic extension's stored credentials on every command, the same root cause as the 0.0.26 Codex fix which only cleared Codex secrets. Separately, OpenCode Go requests were missing the x-opencode-session header and catalog normalization discarded each model's adapter declaration, routing everything to /chat/completions, so every model expecting /responses or /messages failed with internal server errors.