fix: remove unused imports and dead code surfaced by stricter tsconfig

src/components/AchievementToast.tsx

@@ -1,6 +1,5 @@
 import { css, keyframes } from '@emotion/react';
 import { useState, useEffect, useCallback, useRef } from 'react';
-import { adaptive } from '../styles/adaptive';
 
 // ────────────────────────────────────────────────────────────
 // Types

src/components/PrestigeModal.tsx

@@ -1,5 +1,5 @@
 import { css, keyframes } from '@emotion/react';
-import { useState, useEffect, useRef } from 'react';
+import { useState, useRef } from 'react';
 import { adaptive } from '../styles/adaptive';
 import { useGameStore } from '../store/useGameStore';
 import prestigeTableData from '../data/prestige.json';

src/components/screens/EvolutionScreen.tsx

@@ -64,13 +64,6 @@ const cardFlashStyle = css`
   animation: ${flashAnim} 0.9s ease-out;
 `;
 
-const levelUpPopAnim = keyframes`
-  0%   { transform: translateY(0) scale(0.6); opacity: 0; }
-  30%  { transform: translateY(-10px) scale(1.2); opacity: 1; }
-  70%  { opacity: 1; }
-  100% { transform: translateY(-50px) scale(0.9); opacity: 0; }
-`;
-
 const enhanceButtonWrapStyle = css`
   position: relative;
 `;