NodeBrain v0.3.8

Polish and security-hardening release.

Improvements

Redesigned execution logs. The dashboard's execution logs now group into per-run summary cards — each showing the agent, a plain-language description of what the run did, its outcome (Success / Failed / Needs Approval / Running), and the time. Expanding a card shows the full task and the raw log trace. Live logs are unchanged.
Readable schedules on the node graph. Scheduled agents now display their actual run time (e.g. "10:45 PM") instead of a generic "scheduled" label. Interval and weekday schedules are shown in plain language too.
No more terminal windows. Starting an MCP server no longer flashes a console window on Windows, whether you're adding an integration or reopening the app.

Pinned MCP server versions. The built-in integrations are now pinned to specific, known versions instead of always pulling the latest on launch. This prevents a compromised upstream package from being silently pulled into a running install. Versions are updated deliberately in each release.
Hardened credential vault. MCP servers can no longer access the vault's master key or any stored credentials beyond the single credential they're given. The vault key is now removed from the environment before any integration starts.

If you store credentials in the vault, they continue to work — no action needed.
Code signing is still pending, so the unsigned Windows build may show a SmartScreen warning (More info → Run anyway).
All v0.3.7 fixes and features are included.