v0.12.4

[0.12.4] - 2026-06-22 - MINXG Chat rewrite + flicker-free picker + safe print

MINXG Chat rebuild

• A proper REPL replaces the old "you > " stub.
  tui_chat() now lives entirely in multiligua_cli/tui_chat.py
  and ships a polished three-region UI: a top status bar
  (provider · model · host · depth/cost), a scrolling conversation
  thread that streams tokens under rich.live, and a
  helper-rich bottom input box. The brand label inside the banner is
  MINXG Chat (formerly the ambiguous "chat CLI") — the change
  is documented in README §Tutorial A.
• Brand refactor. The hard-coded product name in the chat
  surface, /help, README, and DEVELOPER.md is consolidated under
  tui_chat._BRAND = "MINXG Chat". Updating the brand now means
  changing one constant.
• Streaming faithful to upstream events.
  _stream consumes text / thinking / tool_call / tool_result / done / error events from NexusOrchestrator.chat_stream and
  renders tool calls as inline → name (Nms) widgets with a
  yellow anti-loop warning line if the safety guard fires.

In-place reconfiguration (no chat restart)

• New slash commands: /setup, /provider [slug], /model [name], /url [URL], /apikey [KEY], /lang [code],
  /history. They hot-swap the orchestrator, save the config
  atomically (tmp + os.replace), and re-paint the status bar
  without dropping the session.
• /provider <slug> is non-interactive (omit the slug for the
  picker). /model <name> tries to fetch GET /models from the
  current provider; if the API is reachable, the picker shows the
  real list of available models. If the fetch fails, it falls back
  to the provider's default_model and accepts typed input.
• /setup reruns the wizard with the existing config as
  defaults, then re-renders the chat banner — no more "exit chat
  → minxg setup → re-enter chat" round-trip.
• /apikey is masked before being written to disk, the way
  the wizard has always done it. Naked key payloads no longer leak
  to log files.

Bug fixes

• MinxgMenu no longer flickers under Termux. The old
  _render forked clear on every arrow-key press and wiped the
  whole scrollback; the new implementation paints in place using
  \033[<n>A (cursor up) + \033[J (erase to end of screen), so
  the chat scrollback stays intact and no full-screen flicker
  shows up under tmux/SSH/screen.
• print_error / print_success / print_info / print_warning / print_dim no longer crash on user messages that contain
  brackets. A new _escape_markup escapes [ and ] in
  inbound strings before handing them to rich, so URLs, exception
  messages and model names with brackets stop raising
  rich.errors.MarkupError inside the chat prompt.

NUANCE alignment

• The new _save_config (atomic write) centralises every
  one-shot setter that previously hand-rolled yaml.dump —
  minxg model <name>, minxg api <url>, minxg key <key>,
  minxg lang <code> now share one error-handling path.
• All chat-side saves log a friendly Config saved to ... /
  Save failed: <hint> line so the user can see exactly which
  file was touched (and why) — instead of dumping a yaml
  traceback on top of a half-finished wizard panel.

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and this project adheres to Semantic Versioning.