Trip composer: stack the map confirm box (place name above the Add button)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014W6tgHRgLEugCsbKC9ccST

Author: davd-gzl

apps/postcards/src/styles.css

@@ -2911,8 +2911,10 @@ h1.brand {
 }
 .route-popup {
   display: flex;
-  align-items: center;
-  gap: 8px;
+  flex-direction: column;
+  align-items: stretch;
+  gap: 6px;
+  text-align: center;
 }
 .route-popup-name {
   font-weight: 600;