ui_design v2: tactical-ops redesign of all 5 pages
Two parallel takes on visual polish for flights, annotations, dataset
explorer, admin, and settings.
- v2/plugin/ — self-contained HTML produced via the frontend-design
plugin, adheres to v2/plugin/_design_system.md..
- v2/stitch/ — Google Stitch MCP exports against the same design
system.
IA from the original wireframes in _docs/ui_design/ is preserved
verbatim — this pass is visual only.