Fix mana conversion visibility and UI improvements

- Increase attunement mana conversion rates (0.2 -> 2 for Enchanter)
- Hide mana types with current < 1 in ManaDisplay and LabTab
- Only show owned equipment types when designing enchantments

src/components/game/layout/GameFooter.tsx

@@ -0,0 +1,19 @@
+'use client';
+
+import { useGameContext } from '../GameContext';
+
+export function GameFooter() {
+  const { store } = useGameContext();
+
+  return (
+    <footer className="sticky bottom-0 bg-gray-900/80 border-t border-gray-700 px-4 py-2 text-center text-xs text-gray-500">
+      <span className="text-gray-400">Loop {store.loopCount + 1}</span>
+      {' • '}
+      <span>Pacts: {store.signedPacts.length}/{store.pactSlots}</span>
+      {' • '}
+      <span>Spells: {Object.values(store.spells).filter((s) => s.learned).length}</span>
+      {' • '}
+      <span>Skills: {Object.values(store.skills).reduce((a, b) => a + b, 0)}</span>
+    </footer>
+  );
+}