a11y: add error boundary, reduced motion, remaining fixes

src/App.tsx

@@ -1,5 +1,5 @@
 import React, { useState, useEffect, useCallback } from 'react';
-import { motion, AnimatePresence } from 'motion/react';
+import { motion, AnimatePresence, useReducedMotion } from 'motion/react';
 import { AppState, PaperSize } from './types';
 import { FileUpload } from './components/FileUpload';
 import { StyleSelector } from './components/StyleSelector';
@@ -82,6 +82,7 @@ const KeyboardShortcutsHelp: React.FC<{ isOpen: boolean; onClose: () => void }>
 };
 
 const App: React.FC = () => {
+  const prefersReducedMotion = useReducedMotion();
   const [appState, setAppState] = useState<AppState>(AppState.UPLOAD);
   const [content, setContent] = useState<string>('');
   const [inputFileName, setInputFileName] = useState<string>('');
@@ -276,6 +277,8 @@ const App: React.FC = () => {
               <kbd className="px-1.5 py-0.5 bg-zinc-800 rounded text-zinc-400 font-mono">?</kbd>
             </motion.button>
 
+            <kbd className="sm:hidden px-1.5 py-0.5 bg-zinc-800 rounded text-zinc-400 font-mono text-xs border border-zinc-700 cursor-pointer" onClick={() => setShowShortcuts(true)} role="button" aria-label="Show keyboard shortcuts">?</kbd>
+
             <AnimatePresence mode="wait">
               {appState !== AppState.UPLOAD && (
                 <motion.nav
@@ -304,7 +307,7 @@ const App: React.FC = () => {
         <div className="absolute inset-0 overflow-hidden pointer-events-none" aria-hidden="true">
           <motion.div
             className="absolute -top-[20%] -left-[10%] w-[50%] h-[50%] bg-indigo-900/10 rounded-full blur-3xl"
-            animate={{
+            animate={prefersReducedMotion ? {} : {
               x: [0, 30, 0],
               y: [0, -20, 0],
               scale: [1, 1.1, 1]
@@ -313,7 +316,7 @@ const App: React.FC = () => {
           />
           <motion.div
             className="absolute top-[20%] -right-[10%] w-[40%] h-[40%] bg-violet-900/10 rounded-full blur-3xl"
-            animate={{
+            animate={prefersReducedMotion ? {} : {
               x: [0, -20, 0],
               y: [0, 30, 0],
               scale: [1, 1.15, 1]
@@ -348,7 +351,7 @@ const App: React.FC = () => {
                     Turn Markdown into <br />
                     <motion.span
                       className="text-transparent bg-clip-text bg-gradient-to-r from-indigo-400 to-violet-400"
-                      animate={{
+                      animate={prefersReducedMotion ? {} : {
                         backgroundPosition: ["0% 50%", "100% 50%", "0% 50%"]
                       }}
                       transition={{ duration: 5, repeat: Infinity, ease: "linear" }}
@@ -421,12 +424,12 @@ const App: React.FC = () => {
               >
                 <motion.div
                   className="relative"
-                  animate={{ rotate: 360 }}
+                  animate={prefersReducedMotion ? {} : { rotate: 360 }}
                   transition={{ duration: 2, repeat: Infinity, ease: "linear" }}
                 >
                   <motion.div
                     className="absolute inset-0 bg-indigo-500 blur-xl opacity-20"
-                    animate={{ scale: [1, 1.2, 1], opacity: [0.2, 0.4, 0.2] }}
+                    animate={prefersReducedMotion ? {} : { scale: [1, 1.2, 1], opacity: [0.2, 0.4, 0.2] }}
                     transition={{ duration: 1.5, repeat: Infinity }}
                   />
                   <Loader2 size={64} className="text-indigo-400 relative z-10" aria-hidden="true" />

src/components/ErrorBoundary.tsx

@@ -0,0 +1,43 @@
+import React from 'react';
+
+interface ErrorBoundaryState {
+  hasError: boolean;
+  error: Error | null;
+}
+
+export class ErrorBoundary extends React.Component<{ children: React.ReactNode }, ErrorBoundaryState> {
+  constructor(props: { children: React.ReactNode }) {
+    super(props);
+    this.state = { hasError: false, error: null };
+  }
+
+  static getDerivedStateFromError(error: Error): ErrorBoundaryState {
+    return { hasError: true, error };
+  }
+
+  render() {
+    if (this.state.hasError) {
+      return (
+        <div
+          role="alert"
+          className="h-screen w-screen flex items-center justify-center bg-zinc-950 text-zinc-100 p-8"
+        >
+          <div className="max-w-md text-center">
+            <h1 className="text-2xl font-bold mb-4">Something went wrong</h1>
+            <p className="text-zinc-400 mb-6">
+              TypoGenie encountered an unexpected error. Please reload the application.
+            </p>
+            <button
+              onClick={() => window.location.reload()}
+              className="px-6 py-3 bg-indigo-600 hover:bg-indigo-500 text-white font-semibold rounded-xl transition-colors"
+            >
+              Reload
+            </button>
+          </div>
+        </div>
+      );
+    }
+
+    return this.props.children;
+  }
+}

src/components/StyleSelector.tsx

@@ -431,7 +431,7 @@ export const StyleSelector: React.FC<StyleSelectorProps> = ({
                     )}
                   </div>
                 </div>
-                <p className="text-xs text-zinc-400 line-clamp-2 leading-relaxed mb-2">{style.description}</p>
+                <p className="text-xs text-zinc-400 line-clamp-2 leading-relaxed mb-2" title={style.description}>{style.description}</p>
                 <div className="flex items-center gap-2">
                   <span className={`text-[10px] uppercase font-mono tracking-wider px-1.5 py-0.5 rounded
                     ${selectedStyle === style.id ? 'bg-indigo-500/20 text-indigo-300' : 'bg-zinc-800 text-zinc-400'}`}>

src/main.tsx

@@ -1,6 +1,7 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import App from './App';
+import { ErrorBoundary } from './components/ErrorBoundary';
 import './index.css';
 
 const rootElement = document.getElementById('root');
@@ -11,6 +12,8 @@ if (!rootElement) {
 const root = ReactDOM.createRoot(rootElement);
 root.render(
   <React.StrictMode>
-    <App />
+    <ErrorBoundary>
+      <App />
+    </ErrorBoundary>
   </React.StrictMode>
 );