PICK SEA reversal axis: server-side roll + preview + deposited slot — TDD

- new apps/epic/utils.STACK_REVERSAL_PROBABILITY (=0.25) + stack_reversal_probability(user, room) helper; single source of truth across game phases & one-line swap point for forthcoming per-user-profile config
- sea_deck view rolls each card's `reversed` axis at fetch time using the helper, attaches to card JSON; matches the eager shuffle pattern (whole deal determined at phase start)
- room_view + sea_partial pass `stack_reversal_pct` into context for the new <p class="sea-reversal-hint">25% reversals</p> hint above the SPREAD combobox (italic, 0.7rem, 0.55 opacity)
- SeaDeal.openStage applies .stage-card--reversed + .is-reversed to stat block when card.reversed → preview lands face-reversed w. REVERSAL keywords
- _fillSlot adds .sea-card-slot--reversed → slot itself rotates 180° (bg + border + content stack flips, not just inner chars upside-down in place); .sea-pos-cross overrides to 270° to compose w. its existing 90°
- _fillSlot adds .sea-card-slot--rank-long when corner_rank.length ≥ 5 (XVIII / XXIII / XXVIII / XXXIII / XXXVIII / XLIII / XLVIII) → SCSS scaleX(0.7) + letter-spacing -0.05em squeezes horizontally w.o changing font-size

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Sonnet 4.6 <noreply@anthropic.com>

src/apps/epic/views.py

@@ -22,7 +22,7 @@ from apps.epic.models import (
     active_sig_seat, debit_token, levity_sig_cards, gravity_sig_cards,
     select_token, sig_deck_cards,
 )
-from apps.epic.utils import _compute_distinctions, _planet_house
+from apps.epic.utils import _compute_distinctions, _planet_house, stack_reversal_probability
 from apps.lyric.models import Token
 
 
@@ -402,6 +402,9 @@ def room_view(request, room_id):
     ctx = _role_select_context(room, request.user)
     ctx["room"] = room
     ctx["page_class"] = "page-gameboard"
+    # Reversal-rate hint label under PICK SEA's SPREAD select — same helper as
+    # sea_partial so the value tracks any future per-user override automatically.
+    ctx["stack_reversal_pct"] = int(round(stack_reversal_probability(request.user, room) * 100))
     return render(request, "apps/gameboard/room.html", ctx)
 
 
@@ -1132,6 +1135,11 @@ def sea_deck(request, room_id):
         .values_list('significator_id', flat=True)
     )
 
+    # Roll reversal eagerly during the shuffle — the deck order is fully
+    # determined at phase start, so the reversal axis should be too. Future
+    # per-user-profile config rides this same helper.
+    reversal_prob = stack_reversal_probability(request.user, room)
+
     def _card_dict(c):
         return {
             'id': c.id,
@@ -1157,6 +1165,8 @@ def sea_deck(request, room_id):
             'keywords_reversed': c.keywords_reversed,
             'energies': c.energies,
             'operations': c.operations,
+            # Pre-rolled reversal axis — server-deterministic, client just reads
+            'reversed': _random.random() < reversal_prob,
         }
 
     available = list(
@@ -1178,5 +1188,10 @@ def sea_partial(request, room_id):
     if not ctx.get('sky_confirmed'):
         return HttpResponse(status=403)
     ctx['room'] = room
+    # Reversal-rate hint label under SPREAD — both the percentage AND the raw
+    # probability flow from the same helper, so when per-user config lands we
+    # only swap the helper body and every render picks it up.
+    _prob = stack_reversal_probability(request.user, room)
+    ctx['stack_reversal_pct'] = int(round(_prob * 100))
     return render(request, 'apps/gameboard/_partials/_sea_overlay.html', ctx)