Add URL parameter support for Bible version

- Read version parameter from URL on page load (?version=esv|?version=nkjv)
- Update URL with version when selection changes
- Enable shareable version-specific URLs like /book/Genesis/chapter/1?version=nkjv

frontend/src/App.tsx

@@ -32,6 +32,15 @@ function App() {
   // Debug logging
   console.log('App component rendered');
 
+  // Read version from URL on mount
+  useEffect(() => {
+    const urlParams = new URLSearchParams(location.search);
+    const versionParam = urlParams.get('version');
+    if (versionParam && (versionParam === 'esv' || versionParam === 'nkjv')) {
+      setSelectedVersion(versionParam);
+    }
+  }, []);
+
   useEffect(() => {
     console.log('App useEffect triggered');
     loadVersions();
@@ -42,6 +51,14 @@ function App() {
   // Load versions when version changes
   useEffect(() => {
     loadBooks();
+    // Update URL with version when it changes
+    const url = new URL(window.location.href);
+    if (selectedVersion !== 'esv') { // Only add if not default
+      url.searchParams.set('version', selectedVersion);
+    } else {
+      url.searchParams.delete('version');
+    }
+    window.history.replaceState({}, '', url.toString());
   }, [selectedVersion]);
 
   // Load user preferences when user changes