Update assistant features and docs

scripts/qwen-check.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT"
+
+echo "[qwen-check] Python syntax compile check"
+python -m compileall app run.py >/dev/null
+
+echo "[qwen-check] Optional ruff check"
+if command -v ruff >/dev/null 2>&1; then
+  ruff check app run.py
+else
+  echo "[qwen-check] ruff not installed, skipping"
+fi
+
+echo "[qwen-check] Optional pytest"
+if command -v pytest >/dev/null 2>&1 && [ -d tests ]; then
+  pytest -q
+else
+  echo "[qwen-check] tests/ or pytest not found, skipping"
+fi
+
+echo "[qwen-check] Done"