feat: add conversational replies and stable output

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a03397-4d51-7fd1-8ff2-946eb22ea2bc

tests/test_service_delivery.py

@@ -1,3 +1,4 @@
+from tamq.control import PaneDisplay
 from tamq.service import Service
 from tamq.store import Store
 
@@ -19,8 +20,14 @@ class FakeControl:
     def inject(self, window, text):
         self.injected.append((window, text))
 
-    def pane_tty(self, window):
-        return f"/dev/pts/{window.rsplit(':', 1)[-1]}"
+    def pane_display(self, window):
+        return PaneDisplay(
+            tty_path=f"/dev/pts/{window.rsplit(':', 1)[-1]}",
+            cursor_x=0,
+            cursor_y=0,
+            pane_height=24,
+            alternate_on=False,
+        )
 
     def close(self):
         return None