feat(tui): print resume command on exit

tui/scripts/pty_smoke.py

@@ -24,6 +24,7 @@ from pathlib import Path
 ROOT = Path(__file__).resolve().parents[1]
 ENTER_ALT_SCREEN = b"\x1b[?1049h"
 LEAVE_ALT_SCREEN = b"\x1b[?1049l"
+RESUME_COMMAND = b"Resume with: nanobot agent --session websocket:resume-chat"
 
 
 def _resize(fd: int, rows: int, columns: int) -> None:
@@ -82,6 +83,7 @@ def main() -> int:
         "NANOBOT_TUI_WS_URL": "ws://127.0.0.1:9/ws",
         "NANOBOT_TUI_API_URL": "",
         "NANOBOT_TUI_API_TOKEN": "",
+        "NANOBOT_TUI_CHAT_ID": "resume-chat",
         "NANOBOT_TUI_MODEL": "test/model",
         "NANOBOT_TUI_WORKSPACE": "/tmp/nanobot-tui-pty",
         "NANOBOT_TUI_VERSION": "test",
@@ -126,6 +128,7 @@ def main() -> int:
         os.write(master, b"exit\r")
         output.extend(_wait_for(master, LEAVE_ALT_SCREEN, 5))
         exit_code = _wait_for_exit(pid, 5)
+        output.extend(_read(master, 0.5))
         reaped = True
     finally:
         if not reaped:
@@ -146,6 +149,10 @@ def main() -> int:
             raise AssertionError(f"TUI did not render committed input {glyph!r}")
     if "Traceback" in text or "Task exception was never retrieved" in text:
         raise AssertionError("TUI emitted an exception during shutdown")
+    if output.count(RESUME_COMMAND) != 1:
+        raise AssertionError("TUI did not print exactly one reusable session command")
+    if output.index(RESUME_COMMAND) < output.index(LEAVE_ALT_SCREEN):
+        raise AssertionError("TUI printed the session command before restoring the terminal")
     # The UI must inherit the host terminal background. Fixed RGB/indexed
     # surfaces become black strips in embedded terminals after long output.
     for escape in (
@@ -156,7 +163,7 @@ def main() -> int:
     ):
         if escape in output:
             raise AssertionError(f"TUI painted a fixed background: {escape!r}")
-    print("PTY smoke test passed: Unicode input, resize, and terminal restoration")
+    print("PTY smoke test passed: Unicode input, resize, restoration, and session resume")
     return 0