share: nudge heart-to-text gap from 10 → 14 px

The pill's static heart was sitting a touch close to the "H" in
"Helping a new person in <country>". 4 px is the smallest visibly
noticeable nudge — large enough to ease the crowding without making
the pill feel padded.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 2 people

lib/features/share_my_connection/share_my_connection.dart

@@ -1138,7 +1138,7 @@ class _ArrivalCard extends StatelessWidget {
                 ],
               ),
             ),
-            const SizedBox(width: 10),
+            const SizedBox(width: 14),
             // unbounded.lantern.io renders just `heart + text`, no flag
             // emoji — matching that exactly so the pill width stays in
             // bounds and the layout reads cleanly. flagEmoji is still