fix: add React ErrorBoundary to prevent white-screen crashes

frontend/src/components/ErrorBoundary.jsx

@@ -10,23 +10,23 @@ export default class ErrorBoundary extends React.Component {
     return { hasError: true, error }
   }
 
-  componentDidCatch(error, errorInfo) {
-    console.error('Bharat Tech Atlas Error:', error, errorInfo)
+  componentDidCatch(error, info) {
+    console.error('ErrorBoundary caught:', error, info)
   }
 
   render() {
     if (this.state.hasError) {
       return (
         <div className="min-h-screen bg-atlas-bg flex items-center justify-center p-4">
-          <div className="text-center space-y-4">
-            <div className="text-6xl">🗺️💥</div>
-            <h1 className="text-xl font-bold text-atlas-text">Something went wrong</h1>
-            <p className="text-sm text-atlas-muted max-w-md">
-              The map encountered an unexpected error. This usually happens when WebGL is not supported or the browser is outdated.
+          <div className="glass rounded-2xl p-8 max-w-md text-center">
+            <div className="text-4xl mb-4">⚠️</div>
+            <h2 className="text-xl font-bold text-atlas-text mb-2">Something went wrong</h2>
+            <p className="text-sm text-atlas-muted mb-4">
+              The map encountered an error. Reloading usually fixes transient rendering/network issues.
             </p>
             <button
-              onClick={() => window.location.reload()}
-              className="px-4 py-2 bg-brand-500/20 text-brand-400 rounded-lg text-sm font-medium hover:bg-brand-500/30 transition-colors"
+              onClick={() => { this.setState({ hasError: false, error: null }); window.location.reload(); }}
+              className="bg-brand-500 hover:bg-brand-600 text-white px-4 py-2 rounded-lg text-sm font-medium transition-colors"
             >
               Reload Page
             </button>