Add React Router for proper URL navigation and browser history support

frontend/src/App.tsx

@@ -1,4 +1,5 @@
 import React, { useState, useEffect } from 'react';
+import { Routes, Route, useNavigate, useParams, useLocation } from 'react-router-dom';
 import { Book, ChevronRight, Moon, Sun } from 'lucide-react';
 import BookSelector from './components/BookSelector';
 import ChapterSelector from './components/ChapterSelector';
@@ -9,10 +10,69 @@ interface BookData {
   books: string[];
 }
 
+// Component for the home page
+function HomePage({ books, formatBookName }: { books: string[], formatBookName: (name: string) => string }) {
+  const navigate = useNavigate();
+  
+  const handleBookSelect = (book: string) => {
+    navigate(`/book/${book}`);
+  };
+
+  return <BookSelector books={books} onBookSelect={handleBookSelect} formatBookName={formatBookName} />;
+}
+
+// Component for book chapters page
+function BookPage({ books, formatBookName }: { books: string[], formatBookName: (name: string) => string }) {
+  const { bookName } = useParams<{ bookName: string }>();
+  const navigate = useNavigate();
+
+  const handleChapterSelect = (chapter: string) => {
+    navigate(`/book/${bookName}/chapter/${chapter}`);
+  };
+
+  const handleBack = () => {
+    navigate('/');
+  };
+
+  if (!bookName || !books.includes(bookName)) {
+    return <div>Book not found</div>;
+  }
+
+  return (
+    <ChapterSelector
+      book={bookName}
+      onChapterSelect={handleChapterSelect}
+      onBack={handleBack}
+      formatBookName={formatBookName}
+    />
+  );
+}
+
+// Component for chapter reading page
+function ChapterPage({ formatBookName }: { formatBookName: (name: string) => string }) {
+  const { bookName, chapterNumber } = useParams<{ bookName: string, chapterNumber: string }>();
+  const navigate = useNavigate();
+
+  const handleBack = () => {
+    navigate(`/book/${bookName}`);
+  };
+
+  if (!bookName || !chapterNumber) {
+    return <div>Chapter not found</div>;
+  }
+
+  return (
+    <BibleReader
+      book={bookName}
+      chapter={chapterNumber}
+      onBack={handleBack}
+      formatBookName={formatBookName}
+    />
+  );
+}
+
 function App() {
   const [books, setBooks] = useState<string[]>([]);
-  const [selectedBook, setSelectedBook] = useState<string>('');
-  const [selectedChapter, setSelectedChapter] = useState<string>('');
   const [loading, setLoading] = useState(true);
   const [darkMode, setDarkMode] = useState(() => {
     // Load dark mode preference from localStorage
@@ -20,6 +80,8 @@ function App() {
     return saved ? JSON.parse(saved) : false;
   });
   const [error, setError] = useState<string>('');
+  const location = useLocation();
+  const navigate = useNavigate();
 
   // Debug logging
   console.log('App component rendered');
@@ -59,23 +121,24 @@ function App() {
     }
   };
 
-  const handleBookSelect = (book: string) => {
-    setSelectedBook(book);
-    setSelectedChapter('');
+  // Get current navigation info from URL
+  const getCurrentNavInfo = () => {
+    const pathParts = location.pathname.split('/').filter(Boolean);
+    
+    if (pathParts.length === 0) {
+      return { currentBook: null, currentChapter: null };
+    }
+    
+    if (pathParts[0] === 'book' && pathParts[1]) {
+      const currentBook = pathParts[1];
+      const currentChapter = pathParts[2] === 'chapter' && pathParts[3] ? pathParts[3] : null;
+      return { currentBook, currentChapter };
+    }
+    
+    return { currentBook: null, currentChapter: null };
   };
 
-  const handleChapterSelect = (chapter: string) => {
-    setSelectedChapter(chapter);
-  };
-
-  const handleBackToBooks = () => {
-    setSelectedBook('');
-    setSelectedChapter('');
-  };
-
-  const handleBackToChapters = () => {
-    setSelectedChapter('');
-  };
+  const { currentBook, currentChapter } = getCurrentNavInfo();
 
   if (loading) {
     return (
@@ -96,37 +159,40 @@ function App() {
           <div className="flex justify-between items-center h-16">
             <div className="flex items-center space-x-4">
               <Book className="h-8 w-8 text-blue-600" />
-              <h1 className="text-xl font-bold text-gray-900 dark:text-gray-100">
+              <button 
+                onClick={() => navigate('/')}
+                className="text-xl font-bold text-gray-900 dark:text-gray-100 hover:text-blue-600 dark:hover:text-blue-400"
+              >
                 ESV Bible
-              </h1>
+              </button>
             </div>
 
             {/* Navigation Breadcrumb */}
             <div className="flex items-center space-x-2 text-sm text-gray-600 dark:text-gray-400">
-              {selectedBook && (
+              {currentBook && (
                 <>
                   <button
-                    onClick={handleBackToBooks}
+                    onClick={() => navigate('/')}
                     className="hover:text-blue-600 dark:hover:text-blue-400"
                   >
                     Books
                   </button>
                   <ChevronRight className="h-4 w-4" />
                   <span className="font-medium text-gray-900 dark:text-gray-100">
-                    {formatBookName(selectedBook)}
+                    {formatBookName(currentBook)}
                   </span>
-                  {selectedChapter && (
+                  {currentChapter && (
                     <>
                       <ChevronRight className="h-4 w-4" />
                       <button
-                        onClick={handleBackToChapters}
+                        onClick={() => navigate(`/book/${currentBook}`)}
                         className="hover:text-blue-600 dark:hover:text-blue-400"
                       >
                         Chapters
                       </button>
                       <ChevronRight className="h-4 w-4" />
                       <span className="font-medium text-gray-900 dark:text-gray-100">
-                        Chapter {selectedChapter}
+                        Chapter {currentChapter}
                       </span>
                     </>
                   )}
@@ -151,23 +217,11 @@ function App() {
 
       {/* Main Content */}
       <main className="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
-        {!selectedBook ? (
-          <BookSelector books={books} onBookSelect={handleBookSelect} formatBookName={formatBookName} />
-        ) : !selectedChapter ? (
-          <ChapterSelector
-            book={selectedBook}
-            onChapterSelect={handleChapterSelect}
-            onBack={handleBackToBooks}
-            formatBookName={formatBookName}
-          />
-        ) : (
-          <BibleReader
-            book={selectedBook}
-            chapter={selectedChapter}
-            onBack={handleBackToChapters}
-            formatBookName={formatBookName}
-          />
-        )}
+        <Routes>
+          <Route path="/" element={<HomePage books={books} formatBookName={formatBookName} />} />
+          <Route path="/book/:bookName" element={<BookPage books={books} formatBookName={formatBookName} />} />
+          <Route path="/book/:bookName/chapter/:chapterNumber" element={<ChapterPage formatBookName={formatBookName} />} />
+        </Routes>
       </main>
     </div>
   );

frontend/src/index.tsx

@@ -1,5 +1,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom/client';
+import { BrowserRouter } from 'react-router-dom';
 import './index.css';
 import App from './App';
 
@@ -8,6 +9,8 @@ const root = ReactDOM.createRoot(
 );
 root.render(
   <React.StrictMode>
-    <App />
+    <BrowserRouter>
+      <App />
+    </BrowserRouter>
   </React.StrictMode>
 );