repoint post_turn_counts + dedup web_ui stats onto todo_server::dial (#2635 inc 1)

hive-agent/src/todo_server.rs

@@ -35,6 +35,32 @@ fn socket_path() -> Option<PathBuf> {
         .map(PathBuf::from)
 }
 
+/// Dial this same in-agent socket from elsewhere IN THIS PROCESS — the
+/// harness's own `web_ui` endpoints (`api_todos`, `/api/stats` reminder
+/// rollup) and `Surface::post_turn_counts` all need read access to the
+/// `Todos`/`Reminders` stores this module owns behind an `Arc` on a
+/// different spawned task, and a loopback dial is simpler than threading
+/// those `Arc`s through every caller. One-shot, best-effort (no retry,
+/// unlike the broker client): a connect failure means the socket server
+/// task itself isn't up, which a retry within one call wouldn't fix.
+pub(crate) async fn dial(req: &Request) -> Option<Response> {
+    let path = socket_path()?;
+    if !path.exists() {
+        return None;
+    }
+    tokio::time::timeout(std::time::Duration::from_secs(3), async move {
+        let mut stream = UnixStream::connect(&path).await.ok()?;
+        let mut line = serde_json::to_string(req).ok()?;
+        line.push('\n');
+        stream.write_all(line.as_bytes()).await.ok()?;
+        let mut lines = BufReader::new(stream).lines();
+        let resp_line = lines.next_line().await.ok()??;
+        serde_json::from_str(&resp_line).ok()
+    })
+    .await
+    .ok()?
+}
+
 /// Run the in-agent socket server: bind + accept loop, one request/response
 /// line per connection. A no-op (returns `Ok`) when `HIVE_AGENT_SOCKET` is
 /// unset, so a standalone harness without producers just skips it.