Pairs with the dubbodeck assembly: a mixed pile can now hold cards from up to three decks per polarity, so the single server-rendered back (the viewer's seat deck) was wrong for any cross-deck card. Now per-card: each .sig-card thumbnail carries data-back-image-url (its OWN deck back, only for non-polarized image decks; empty otherwise); stage-card.js fromDataset reads back_image_url + _setImageMode repoints the stage .sig-stage-card-back-img at the FOCUSED card's back and shows/hides the FLIP affordance per card (a backless card in the pile hides FLIP + drops any flipped state).
- _sig_select_overlay.html: the stage back-img + FLIP now render on sig_pile_has_backs (ANY pile card is a non-polarized image deck) instead of the viewer's-seat-deck gate, so an RWS grails/blades card in a PC-earthman viewer's pile can FLIP. Initial src dropped (JS sets it on first focus). epic/views.py computes the flag where sig_cards is set; _court_cards/_major_cards gained select_related(deck_variant) to keep the per-card deck access N+1-free.
TDD: 3 ITs in SigSelectUnifiedStageTest (non-polarized image deck -> per-card /static back url + sig_pile_has_backs + stage back-img/FLIP rendered; polarized deck -> empty back + no FLIP element; text-only deck -> empty back). 562 epic view+model ITs green. The JS repoint/hide is the stage-Jasmine debt (deferred) — manually verified.
- bundled (parallel work): rootvars.scss ongoing palette tuning.
[[project-deck-segment-model]] [[project-image-based-deck-face-rendering]]
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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