Fix group messages: push via WebSocket, not just DB queue

Group send_to_group was writing directly to sled DB, bypassing
the WS push. Connected clients never received group messages.

Now tries push_to_client() first (instant WS delivery),
falls back to DB queue if recipient is offline.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

warzone/crates/warzone-server/src/routes/groups.rs

@@ -184,8 +184,13 @@ async fn send_to_group(
     for msg in &req.messages {
         let to = normalize_fp(&msg.to);
         if group.members.contains(&to) {
+            // Try WebSocket push first (instant), fall back to DB queue
+            if state.push_to_client(&to, &msg.message).await {
+                tracing::debug!("Group '{}': pushed to {} via WS", name, to);
+            } else {
                 let key = format!("queue:{}:{}", to, uuid::Uuid::new_v4());
                 state.db.messages.insert(key.as_bytes(), msg.message.as_slice())?;
+            }
             delivered += 1;
         }
     }