feat(extraction): background extraction with review stack#559
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Allow users to press ctrl+b during extraction to background it and continue working. Background extractions run to completion with a status bar indicator showing running/ready counts. Completed extractions stay in a review stack until the user foregrounds them (ctrl+b in normal mode) and explicitly accepts or discards. - Add unique ID to each extraction for message routing - Route progress/LLM messages via findExtraction(id) to support concurrent foreground + background extractions - Auto-background existing extraction when a new one starts - Extend spinner ticking to background extractions - Cancel all extractions on ctrl+q/ctrl+c - 17 user-flow tests covering the full lifecycle closes #490 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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## Summary - `ctrl+b` in the extraction overlay backgrounds a running extraction so the user can continue working - `ctrl+b` in normal/edit mode foregrounds the most recent background extraction for review - Completed background extractions stay in a review stack (no auto-accept) -- user must foreground and explicitly accept or discard - Status bar shows running (`N extracting` with spinner) and completed (`N ready`) background extraction counts - Each extraction gets a unique ID for message routing, enabling concurrent foreground + background processing - New extraction auto-backgrounds any existing foreground extraction instead of cancelling it - `ctrl+q` / `ctrl+c` cancel all foreground and background extractions - 17 user-flow tests covering background, foreground, completion, errors, concurrency, spinner ticking, and cancellation closes #490 Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
ctrl+bin the extraction overlay backgrounds a running extraction so the user can continue workingctrl+bin normal/edit mode foregrounds the most recent background extraction for reviewN extractingwith spinner) and completed (N ready) background extraction countsctrl+q/ctrl+ccancel all foreground and background extractionscloses #490