fix: render tool frames for a non-streaming agent (#91) + correct /status docs (#90)

[dkedar7]

Closes #91 and #90.

#91 — tool calls/results invisible for a non-streaming agent

An agent whose messages are produced without token streaming — a custom node calling model.invoke(), a non-streaming provider, a rule-based node (the "Creating Your Own Agent" shape) — delivers its turn via the AG-UI snapshot path, and langstage-core's snapshot handler yielded text only. So the ● tool_name / ↳ result that print_chunk already knows how to draw never arrived, and a tool-call-only turn rendered nothing while --verify reported success.

The root cause and fix are in langstage-core (fixed there in 1.0.24: the snapshot branch now emits tool_calls/tool_result). This release raises the floor to >= 1.0.24 and adds an integration test driving the issue's exact graph through the CLI stream path.

Verified end to end — the issue's tool_agent.py, rendered through print_chunk on a UTF-8 terminal:

● get_weather
  └─ Paris
⏺ Let me check the weather.     ↳ Sunny, 24C
⏺ The weather in Paris is sunny, 24C.

Two honest notes:

• Tool frames remain intentionally suppressed in the quiet/scriptable single-shot path (langstage-cli -a x "msg" piped), where stdout carries only the reply text — the "tool chatter" contract from 0.6.20. So a tool-call-only turn is still empty output in that mode (it has no text reply). If you'd rather scriptable mode surface tool frames, that's a deliberate contract change worth its own issue — I didn't flip it unilaterally.
• On a cp1252 Windows console, print_chunk rendering ●/↳ raises UnicodeEncodeError (non-quiet mode) — the same latent glyph-encoding bug as the HITL menu's ❯/✓/✗. Pre-existing, not introduced here; worth a separate ASCII-fallback sweep.

#90 — README /status doc drift

0.6.21 (#88) removed the "sync/async mode" line from /status and updated the CLI Options table + [ui] async_mode example, but missed the /status entry in the Commands list. Corrected to agent, thread, verbose, cwd — matching the runtime.

Verification

Full suite 140 passed.

🤖 Generated with Claude Code

https://claude.ai/code/session_011HWCfJii6gXd3XL3Gq3W8B