UI/UX enhancement decision report set for SCOPE notebooks

[Copilot]

SCOPE currently delivers a three-phase evaluation workflow via Voila-rendered notebooks, but the UX is not optimized for non-technical users and needs clearer direction for modernization while preserving Docker-first, out-of-the-box usage.
This PR adds a structured technical investigation that maps current constraints, evaluates upgrade/migration paths, and recommends a phased execution strategy.

• Current-state diagnosis

  • Added a focused assessment of the existing Voila + ipywidgets architecture, including navigation complexity, form density, styling fragmentation, accessibility risk areas, and deployment ergonomics.
  • File: docs/uiux-investigation/01-current-state-uiux-assessment.md

• Technology option analyses

  • Added separate deep-dive reports for four paths:
    • Modernize current Voila/ipywidgets stack
    • Migrate to Panel
    • Migrate to Streamlit
    • Migrate to React + FastAPI
  • Each report documents architecture direction, expected UX outcomes, and key tradeoffs/risks.
  • Files:
    • docs/uiux-investigation/02-option-a-modernize-voila-ipywidgets.md
    • docs/uiux-investigation/03-option-b-migrate-to-panel.md
    • docs/uiux-investigation/04-option-c-migrate-to-streamlit.md
    • docs/uiux-investigation/05-option-d-react-fastapi.md

• Decision framework + execution roadmap

  • Added a comparative matrix and recommended staged strategy:
    1. Near-term: modernize existing Voila UX
    2. Mid-term: pilot Panel/Streamlit migration
    3. Long-term: consider React+FastAPI only if product scope justifies it
  • Includes concrete decision gates and success metrics.
  • File: docs/uiux-investigation/06-recommendation-decision-matrix-and-roadmap.md

• Report index

  • Added a single entry point for discoverability.
  • File: docs/uiux-investigation/00-index.md

Example excerpt of the decision matrix added:

| Dimension | Option A: Modernize Voila | Option B: Panel | Option C: Streamlit | Option D: React+FastAPI |
|---|---|---|---|---|
| UX modernization ceiling | Medium | High | High | Very High |
| Rewrite effort | Low | Medium | Medium | Very High |
| Operational simplicity in Docker | High | High | High | Medium |