Migrate /wip-overview, /wip-detail, and /hold-detail (1,941 lines vanilla JS)
to Vue 3 SFC architecture. Extract shared CSS/constants/components to
wip-shared/. Switch Pareto charts to vue-echarts with autoresize. Replace
Jinja2 template injection with frontend URL params + constant classification
for Hold Detail. Add 10-min auto-refresh + AbortController to Hold Detail.
Remove three Jinja2 templates, update Flask routes to send_from_directory.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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