* feat(panel): session-start, 7d overview spend, and 30d business spend charts
* feat(panel): surface work sessions as a Git page tab (route was orphaned)
* feat(git): reap spent task branches and render previews at lifecycle chokepoints; guarded stale-branch sweep
* feat(panel): stale-branch cleanup button on the Git page
* fix(git,panel): cursor-resumable sweep, force-delete spent refs, local filter state
* docs(map,rag): branch/preview reaping, cleanup sweep, git-tab work sessions, wave-2 charts
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Co-authored-by: Renn F <rennf93@users.noreply.github.com>
