Update version to 1.6.2 and enhance navigation links across HTML pages

- Updated version number in package-lock.json and relevant HTML files.
- Changed navigation links to point to the root path for consistency.
- Improved code formatting and structure in various JavaScript and HTML files for better readability.

src/js/main.ts

@@ -94,7 +94,7 @@ const init = () => {
               © 2025 BentoPDF. All rights reserved.
             </p>
             <p class="text-gray-500 text-xs mt-2">
-              Version <span id="app-version-simple">1.6.0</span>
+              Version <span id="app-version-simple">1.6.2</span>
             </p>
           </div>
         `;