fix(ui): update ring selection to use effects dict

Fixed AttributeError in _on_ring_selected - NexusRing now uses
effects dict instead of effect_type/effect_value fields.

ui/loadout_manager.py

@@ -1620,12 +1620,13 @@ class LoadoutManagerDialog(QDialog):
     
     def _on_ring_selected(self, ring: NexusRing):
         """Handle ring selection."""
+        effects_str = ", ".join([f"{k}: {v}" for k, v in ring.effects.items()]) if ring.effects else "No effects"
         QMessageBox.information(
             self,
             "Ring Selected",
             f"Selected: {ring.name}\n"
-            f"Effect: {ring.effect_type} {ring.effect_value}\n"
-            f"Slot: Left/Right Ring"
+            f"Effects: {effects_str}\n"
+            f"Slot: {ring.slot}"
         )
     
     def _on_clothing_selected(self, clothing: NexusClothing):