feat(phase 3e dashboard): cross-project /dashboard with tasks, issues, recent docs
- store.RecentDocuments(since, limit) returns dated item_links + parent item
- web/dashboard.go handler aggregates VTODOs + Gitea issues + dated links
across every linked item, fanout via 4-worker goroutine pool, 60s TTL
cache keyed by encoded TreeFilter
- Tasks card: bucketed Overdue/Today/Tomorrow/Week/NoDue, sort by bucket
then due asc; ✓ button completes via existing PutTodo path + busts cache
- Issues card: read-only, reuses GiteaDeps.Cache
- Recent docs card: last-30d event_date links, canonical PER rendered
- Filter chips on top reuse tree_filter URL params (tag/mgmt/has)
- nav adds "dashboard" link; design.md §"Dashboard" documents the surface
- 4 integration tests (empty render, dated-link surfacing, tag filter,
cache hit)
mAi
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