Heartbeat read non-existent split modelProvider/modelId fields while the
dashboard saves runtimeConfig.model as combined "provider/modelId", so
sessions fell through to pi's default model and failed with
"No API key for provider: openai-codex". Add extractRuntimeModel helper
that prefers the combined string and use it from heartbeat.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
c2f6dd3fbf