fix(app): wrap sidebar empty-state actions so longer labels stay inside the card

The "Add project" / "Import session" row in the sidebar's empty state is a
non-wrapping flex row. With longer translations (e.g. Russian) the second
button overflows the card at the default 320px sidebar width.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/app/src/components/sidebar/empty-states.tsx

@@ -99,6 +99,7 @@ const styles = StyleSheet.create((theme) => ({
   },
   actions: {
     flexDirection: "row",
+    flexWrap: "wrap",
     gap: theme.spacing[2],
     marginTop: theme.spacing[4],
   },