Show live background task counts

TODO.md

@@ -5,6 +5,10 @@ one in place when it turns out to need a decision.
 
 ## App — transcript
 
+- [ ] Decide how running background tasks can be inspected. For now the session
+      status shows only the provider-reported count; command details stay in
+      their existing tool cards and must not become subagent cards.
+
 - [ ] Messages received from other agents are inconsistent — sometimes they
       appear, sometimes they don't. **Needs a rig.** Read the code rather than
       measured: a live Claude session only learns of a peer message from the