## Summary
- Abandon the UniFi Pulumi IaC approach after provider bugs caused a network outage (no-op update reset undeclared properties on the default LAN network)
- Remove untracked IaC artifacts (`pulumi/unifi/`, `mise-tasks/unifi-preview`, `mise-tasks/unifi-up`) locally
- Mark `add-unifi-pulumi-stack` plan as Abandoned with explanation
- Create new `segment-home-network` plan for manual three-network segmentation (Main/IoT/Guest) via UX7 web UI
- Rewrite UniFi reference card to remove all Pulumi/IaC references
- Update plan and how-to indexes
## Test plan
- [x] `docs-check-links` passes
- [x] `docs-check-index` passes
- [x] Pre-commit hooks pass
- [ ] Review segmentation plan for completeness before executing manually
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Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/189