sig-select sprint: SigReservation model + sig_reserve view (OK/NVM hold); full sig-select.js rewrite with stage preview, WS hover cursors, reservation lock (must NVM before OK-ing another card — enforced server-side 409 + JS guard); sizeSigModal() + sizeSigCard() in room.js (JS-based card sizing avoids libsass cqw/cqh limitation); stat block hidden until OK pressed; mobile touch: dismiss stage on outside-grid tap when unfocused; 17 IT + Jasmine specs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/apps/epic/models.py

@@ -3,6 +3,7 @@ import uuid
 
 from datetime import timedelta
 from django.db import models
+from django.db.models import UniqueConstraint
 from django.db.models.signals import post_save
 from django.dispatch import receiver
 from django.conf import settings
@@ -324,6 +325,37 @@ class TarotDeck(models.Model):
         self.save(update_fields=["drawn_card_ids"])
 
 
+# ── SigReservation — provisional card hold during SIG_SELECT ──────────────────
+
+class SigReservation(models.Model):
+    LEVITY = 'levity'
+    GRAVITY = 'gravity'
+    POLARITY_CHOICES = [(LEVITY, 'Levity'), (GRAVITY, 'Gravity')]
+
+    room = models.ForeignKey(Room, on_delete=models.CASCADE, related_name='sig_reservations')
+    gamer = models.ForeignKey(
+        settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='sig_reservations'
+    )
+    card = models.ForeignKey(
+        'TarotCard', on_delete=models.CASCADE, related_name='sig_reservations'
+    )
+    role = models.CharField(max_length=2)
+    polarity = models.CharField(max_length=7, choices=POLARITY_CHOICES)
+    reserved_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        constraints = [
+            UniqueConstraint(
+                fields=['room', 'gamer'],
+                name='one_sig_reservation_per_gamer_per_room',
+            ),
+            UniqueConstraint(
+                fields=['room', 'card', 'polarity'],
+                name='one_reservation_per_card_per_polarity_per_room',
+            ),
+        ]
+
+
 # ── Significator deck helpers ─────────────────────────────────────────────────
 
 def sig_deck_cards(room):
@@ -358,6 +390,41 @@ def sig_deck_cards(room):
     return unique_cards + unique_cards  # × 2 = 36
 
 
+def _sig_unique_cards(room):
+    """Return the 18 unique TarotCard objects that form one sig pile."""
+    deck_variant = room.owner.equipped_deck
+    if deck_variant is None:
+        return []
+    wands_pentacles = list(TarotCard.objects.filter(
+        deck_variant=deck_variant,
+        arcana=TarotCard.MINOR,
+        suit__in=[TarotCard.WANDS, TarotCard.PENTACLES],
+        number__in=[11, 12, 13, 14],
+    ))
+    swords_cups = list(TarotCard.objects.filter(
+        deck_variant=deck_variant,
+        arcana=TarotCard.MINOR,
+        suit__in=[TarotCard.SWORDS, TarotCard.CUPS],
+        number__in=[11, 12, 13, 14],
+    ))
+    major = list(TarotCard.objects.filter(
+        deck_variant=deck_variant,
+        arcana=TarotCard.MAJOR,
+        number__in=[0, 1],
+    ))
+    return wands_pentacles + swords_cups + major
+
+
+def levity_sig_cards(room):
+    """The 18 cards available to the levity group (PC/NC/SC)."""
+    return _sig_unique_cards(room)
+
+
+def gravity_sig_cards(room):
+    """The 18 cards available to the gravity group (BC/EC/AC)."""
+    return _sig_unique_cards(room)
+
+
 def sig_seat_order(room):
     """Return TableSeats in canonical PC→NC→EC→SC→AC→BC order."""
     _order = {r: i for i, r in enumerate(SIG_SEAT_ORDER)}