Fix place picker to 6 columns (was hardcoded to 5)

The #place-picker grid was still repeat(5, 52px) from the old 10-place
layout, so 18 places wrapped as 5/row. Now repeat(6) → clean 3×6 grid.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app.py

@@ -459,7 +459,7 @@ CSS = """
   justify-content: center !important; justify-items: center !important;
 }
 #animal-picker .wrap { grid-template-columns: repeat(6, 52px) !important; }
-#place-picker  .wrap { grid-template-columns: repeat(5, 52px) !important; }
+#place-picker  .wrap { grid-template-columns: repeat(6, 52px) !important; }
 .emoji-group label {
   width: 52px !important; height: 52px !important;
   display: flex !important; align-items: center !important; justify-content: center !important;