SIG SELECT sprint 1+2: SPIN animation; Emanation/Reversal; Ally Interaction FYI — TDD

Sprint 1 (template + SCSS):
- Stage card gains .fan-card-reversal-name + .fan-card-reversal-qualifier elements
  (pre-rotated 180° so they read forward after card spins); sig cards gain data-reversal attr
- _card-deck.scss: Z-axis rotate(180deg) spin on .stage-card--reversed; reversed elements
  dim @ opacity 0.25 normally, flip to 1 when card is spun; upright content dims in return
- Stat face labels: Upright→Emanation, Reversed→Reversal
- Fixture updated: Emanation/Reversal labels; reversal elements + data-reversal attr

Sprint 2 (FYI from mechanisms + articulations):
- sig-select.js: _openCaution() now parses data-mechanisms + data-articulations (concat)
  instead of data-cautions; _renderCaution() sets .sig-caution-title from entry.category,
  .sig-caution-effect.innerHTML from entry.effect; empty fallback: "No ally interactions"
- TarotCard model: mechanisms_json + articulations_json @property (parallel to cautions_json)
- Template: data-cautions→data-mechanisms+data-articulations; "Caution!"→"" title (set by JS);
  "Rival Interaction"→"Ally Interaction"; shoptalk <p> removed
- SigSelectSpec.js: all old caution tests migrated to {category,effect} dict format +
  data-mechanisms; 7-spec "FYI from mechanisms + articulations" describe block; 242 specs green

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

src/apps/epic/models.py

@@ -341,6 +341,16 @@ class TarotCard(models.Model):
         import json
         return json.dumps(self.cautions)
 
+    @property
+    def mechanisms_json(self):
+        import json
+        return json.dumps(self.mechanisms)
+
+    @property
+    def articulations_json(self):
+        import json
+        return json.dumps(self.articulations)
+
     def __str__(self):
         return self.name