feat: add address book, fix email layout, update dependencies

- Address book with JMAP sync and local fallback (contacts CRUD,
  search/filter, composer autocomplete, i18n for 8 languages)
- Fix email layout: remove horizontal scroll, left-side clipping,
  and empty spaces from blocked external images in newsletters
- Update all dependencies to latest compatible versions
- Expand i18n from 3 to 8 languages (added ES, IT, DE, NL, PT)
- Upgrade Next.js to 16.1.6 for security patches

app/globals.css

@@ -88,9 +88,7 @@ body {
 
 /* Enhanced Email Content Styling */
 
-/* Wrapper uses inline-block to size to content, enabling horizontal scroll */
 .email-content-wrapper {
-  display: inline-block;
   min-width: 100%;
 }
 
@@ -100,16 +98,8 @@ body {
   line-height: 1.6;
   color: var(--color-foreground);
   max-width: none;
-  /* Size to content's natural width, don't shrink below it */
-  width: max-content;
-  min-width: 100%;
-}
-
-/* Prevent tables with width="100%" from shrinking below their content */
-.email-content table[width="100%"],
-.email-content table[style*="width:100%"],
-.email-content table[style*="width: 100%"] {
-  min-width: max-content;
+  overflow-wrap: break-word;
+  word-wrap: break-word;
 }
 
 .email-content p {