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Frontend for the system-tag refactor (milestone #157 step 6). - HeadsCard: new 'Auto-tag work-in-progress' section (enable + tag-confidence + conflict knobs) for wip/editor process auto-apply, mirroring the chrome card; copy notes they stay VISIBLE and the head only learns from titles/manual (no runaway). Presentation copy narrowed to banner-only. - HiddenReviewStrip: mode-aware — chrome flags read 'hidden as X / Keep hidden / Un-hide'; process flags read 'auto-tagged X / Keep tag / Remove tag'. Same endpoints (the backend returns mode), different words. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>