Phase 5a slice A: a new package that concentrates the "fan out across
linked items" pattern web/dashboard.go, web/timeline.go and mcp/tools.go
each had separate copies of. No callers touch it yet — slices B/C/D
migrate them in turn.
- Aggregator with five methods (Todos/Events/Issues/Docs/Creations) plus
All convenience for the MCP timeline. Each method takes a *store.Item
slice and (optionally) a Window, returns typed Row slices.
- Row types embed the underlying caldav.Todo / caldav.Event / gitea.Issue
so existing html/template field accesses (.Todo.UID, .Event.Summary,
…) keep resolving via Go field promotion in slices B/C.
- TimelineRow sum-type wrapper (with pointer slots per Kind) plus the
flat template-friendly fields. Lifted-but-untouched from web/.
- BuildTimelineDays + SortTimelineRows + EventStartLabel +
EventDurationHint lifted near-verbatim from web/timeline.go.
- CalDAV/Gitea/Store interfaces in the aggregator so unit tests stub IO
cleanly. Real *caldav.Client / *gitea.Client / *store.Store satisfy
by method set.
- Per-source error handling preserved: log at WARN + skip the bad
fetch, return surviving rows.
Tests cover empty inputs, fan-out call counts, per-source error
recovery, window narrowing for todos, issue-cache hit path, doc/creation
allow-list filtering, BuildTimelineDays asc/desc order, sticky pills,
far-future fade, within-day sort.
Plan doc captures the slicing strategy + design decisions:
docs/plans/aggregator-refactor.md.
Task: t-projax-5a-aggregator
