timeline_page

Timeline tab shows the evolution of ideas for the active base — not raw file-index noise.
Sources:
- Git idea lifecycle from indexed `git_created_at` / `git_modified_at` ( created + last edited as separate events when they differ )
- Session idea reindex activity ( one event per idea persisted, with name / status / summary when available )
Opening the tab backfills missing git dates via the `git_dates` analyser ( capped batch ) so the feed is useful without visiting every idea in the Activity Bar.
Reindex must preserve existing git dates across upsert.
Entries are reverse-chronological, filterable by source ( git / reindexed ), and clickable to open the idea.
Each event surfaces idea-centric info: name, short summary, status, kind / tags, and path.
Full live multi-commit git log browsing remains out of scope; this surfaces indexed idea history first.

Status: done

Tags: timeline, ideas, git

Interactive page: timeline_page