Purpose

Apply the latest field UX feedback to the workbook-driven IO List FAT workspace:

1. center LIVE, VALUE, QUALITY, STATUS and RESULT cells/headers
2. make active True visually red and inactive False visually green
3. turn captured relay timestamps green as positive evidence feedback
4. replace the HTML/WebBrowser preview with the full ARIEC60870 native paged preview architecture

FAT table polish

• operational columns use explicit centered templates rather than inherited DataGrid defaults
• True / 1 uses an exciting red emphasis
• False / 0 uses an exciting green emphasis
• good quality is green; invalid/bad quality is red
• ON/OFF relay timestamps remain muted until evidence exists, then turn green
• STATUS and final RESULT remain semantically separate and centered
• no nested pill/card surfaces are introduced into table cells

Native report engine parity

The old HTML preview path is removed. The new architecture is adapted directly from the project-owned ARIEC60870 report engine:

IO FAT report model
→ IoFatReportLayoutEngine (PDF points)
→ native PDF writer
→ WPF FixedDocument / DocumentViewer

PDF export and in-workspace preview now consume the same layout command stream, so page size, pagination, cards, table geometry, headers and footers remain aligned.

The preview adds ARIEC-style controls:

• print
• copy
• zoom out / percentage / zoom in
• fit to width
• previous / current page / next
• refresh
• export selected IED PDF
• native preview indicator

Removed

• WebBrowser
• NavigateToString
• HTML report builder and browser printing

Scope and safety

• preview remains scoped to the selected workbook IED
• project-wide native PDF and .arsas export remain available
• active selected IED sessions are marked DRAFT / LIVE
• official PDF export still requires a sealed session
• acquisition, evidence journal and read-only process behavior are unchanged

Automated validation at head d84175cacb954eb1ef4423623916d75a756e8ff2

Validate IO List Testing run 42 — success

• native WPF FixedDocument / DocumentViewer compilation succeeded
• complete focused IO FAT regression suite passed
• selected-IED PDF scope, shared layout engine, HTML-path removal, native toolbar, centered operational columns and requested color contracts passed

Build ARSAS run 791 — success

• source, website, license, premium UX, protocol and immutable engine invariants passed
• full solution build and complete application regression suite passed
• portable Windows x64 publication and artifact upload succeeded

Validate SV evidence bundles run 74 — success

• Sampled Values evidence workflow remains unaffected

No review threads are open.