fix(email-viewer): Enable horizontal scroll for wide HTML emails

- Change overflow-hidden to overflow-x-auto on email body container
- Add CSS for email-content-wrapper with inline-block display
- Use width: max-content on email-content to respect intrinsic width
- Prevent tables with width="100%" from shrinking below content

Also updates dependencies:
- next: 16.0.10 -> 16.1.1
- react/react-dom: 19.2.1 -> 19.2.3
- next-intl: 4.5.8 -> 4.6.1
- tailwindcss: 4.1.17 -> 4.1.18
- eslint: 9.39.1 -> 9.39.2
- jmap-jam: 0.11.0 -> 0.13.1
- lucide-react: 0.556.0 -> 0.562.0

components/email/email-viewer.tsx

@@ -1195,7 +1195,7 @@ export function EmailViewer({
           )}
 
           {/* Email Body */}
-          <div className="bg-background rounded-lg shadow-sm border border-border overflow-hidden">
+          <div className="bg-background rounded-lg shadow-sm border border-border overflow-x-auto">
             <div className="email-content-wrapper p-6">
               {emailContent.isHtml ? (
                 <div