Cursor: Apply local changes for cloud agent

crates/quicnprotochat-server/src/storage.rs

@@ -346,8 +346,12 @@ impl Store for FileBackedStore {
             channel_id: channel_id.to_vec(),
             recipient_key: recipient_key.to_vec(),
         };
-        let seq = *inner.next_seq.entry(key.clone()).or_insert(0);
-        *inner.next_seq.get_mut(&key).unwrap() = seq + 1;
+        let seq = {
+            let entry = inner.next_seq.entry(key.clone()).or_insert(0);
+            let s = *entry;
+            *entry = s + 1;
+            s
+        };
         inner.map.entry(key).or_default().push_back(SeqEntry { seq, data: payload });
         self.flush_delivery_map(&self.ds_path, &*inner)?;
         Ok(seq)