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leistungsbilanz-ts/docs/spec/08-current-product-backlog.md
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# Current Product Backlog
This document records the next agreed product improvements. It describes
requirements and intended sequencing, not proof of implementation.
## Circuit List Editor
- Collect the remaining editor interaction issues before changing additional
behavior.
## Project History
- Every listed logical snapshot, including automatic snapshots, must be
explicitly restorable from the project history UI.
- Show which project change produced a snapshot. Prefer immutable revision
metadata over storing a second free-form description of the same change.
- Keep restoration auditable as a new project revision and preserve persistent
undo/redo.
## Distribution Boards
- Assign an optional project floor to a distribution board.
- Store a supply classification for each distribution board:
- `AV` (Allgemeine Stromversorgung)
- `SV` (Sicherheitsstromversorgung)
- `EV` (Ersatzstromversorgung)
- `USV` (Unterbrechungsfreie Stromversorgung)
- Include both fields in project snapshots and portable project
export/import.
- Persist changes through project commands so they remain undoable after a
restart.
## Device Voltage Defaults
- Derive voltage from the selected phase type and the project settings:
- single-phase uses the project's single-phase voltage;
- three-phase uses the project's three-phase voltage.
- Apply this default consistently when creating global devices, project
devices and manual circuit-list entries.
- Define explicit override behavior before implementation so a user-entered
exceptional voltage is not silently overwritten when phase type or project
settings change.
## Recommended Sequence
1. Distribution-board floor and supply fields.
2. Device voltage default and override semantics.
3. Snapshot-to-revision descriptions and history presentation.
The Revit/CSV/IFCGUID round-trip remains a separate jointly planned phase and
must not be inferred from these tasks.