fix: complete store migration — fix all tab crashes and ghost field reads

src/app/page.tsx

@@ -73,6 +73,7 @@ function GrimoireTab() {
     // Only access SPELLS_DEF on client-side
     if (typeof window !== 'undefined' && SPELLS_DEF) {
       const filtered = Object.values(SPELLS_DEF || {}).filter((s: any) => s.grimoire);
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setGrimoireSpells(filtered);
     }
   }, []);