refactor: cleanup codebase — remove hydration guards, extract constants, fix bugs

src/components/game/tabs/PrestigeTab.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useState, useEffect, useCallback } from 'react';
+import { useState, useCallback } from 'react';
 import { useShallow } from 'zustand/react/shallow';
 import { usePrestigeStore, useGameStore } from '@/lib/game/stores';
 import { PRESTIGE_DEF } from '@/lib/game/constants/prestige';
@@ -186,8 +186,6 @@ function ResetLoopSection({ loopInsight, onReset }: { loopInsight: number; onRes
 // ─── Main Component ───────────────────────────────────────────────────────────
 
 export function PrestigeTab() {
-  const [mounted, setMounted] = useState(false);
-
   const {
     insight,
     totalInsight,
@@ -212,11 +210,6 @@ export function PrestigeTab() {
 
   const startNewLoop = useGameStore((s) => s.startNewLoop);
 
-  useEffect(() => {
-    // eslint-disable-next-line react-hooks/set-state-in-effect
-    setMounted(true);
-  }, []);
-
   const handlePurchase = useCallback((id: string) => {
     doPrestige(id);
   }, [doPrestige]);
@@ -225,14 +218,6 @@ export function PrestigeTab() {
     startNewLoop();
   }, [startNewLoop]);
 
-  if (!mounted) {
-    return (
-      <div className="flex items-center justify-center p-8 text-gray-500">
-        Loading prestige…
-      </div>
-    );
-  }
-
   const upgradeEntries = Object.entries(PRESTIGE_DEF);
 
   return (