feat: TUI 深度（文件树 + 会话列表 + Plan 状态栏，headless 自验）

tests/test_tui_features.py

@@ -0,0 +1,60 @@
+"""TUI 深度功能测试：文件树 / 会话相对时间 / Plan 状态（纯函数可测部分）"""
+import os
+import tempfile
+from datetime import datetime, timedelta
+
+import pytest
+
+from xcli_core.tui import XiaoliTUI, TEXTUAL_AVAILABLE
+
+pytestmark = pytest.mark.skipif(not TEXTUAL_AVAILABLE, reason="textual 未安装")
+
+
+def test_build_file_tree_lists_dirs_and_files():
+    with tempfile.TemporaryDirectory() as d:
+        os.mkdir(os.path.join(d, "sub"))
+        open(os.path.join(d, "a.py"), "w").close()
+        open(os.path.join(d, "b.txt"), "w").close()
+        items = XiaoliTUI._build_file_tree(d)
+        names = [n for n, _ in items]
+        assert "sub" in names and "a.py" in names and "b.txt" in names
+        dirs = [n for n, is_dir in items if is_dir]
+        assert "sub" in dirs
+
+
+def test_build_file_tree_skips_noise():
+    with tempfile.TemporaryDirectory() as d:
+        os.mkdir(os.path.join(d, ".git"))
+        os.mkdir(os.path.join(d, "__pycache__"))
+        open(os.path.join(d, "real.py"), "w").close()
+        items = XiaoliTUI._build_file_tree(d)
+        names = [n for n, _ in items]
+        assert ".git" not in names and "__pycache__" not in names
+        assert "real.py" in names
+
+
+def test_build_file_tree_max_items():
+    with tempfile.TemporaryDirectory() as d:
+        for i in range(100):
+            open(os.path.join(d, f"f{i}.txt"), "w").close()
+        items = XiaoliTUI._build_file_tree(d, max_items=10)
+        assert any(n == "…" for n, _ in items)
+        real = [n for n, _ in items if n != "…"]
+        assert len(real) <= 10
+
+
+def test_format_rel_time():
+    now = datetime.now()
+    assert "刚刚" in XiaoliTUI._format_rel_time(now.isoformat())
+    assert "分钟前" in XiaoliTUI._format_rel_time((now - timedelta(minutes=5)).isoformat())
+    assert "小时前" in XiaoliTUI._format_rel_time((now - timedelta(hours=3)).isoformat())
+    assert "天前" in XiaoliTUI._format_rel_time((now - timedelta(days=2)).isoformat())
+    assert XiaoliTUI._format_rel_time("") == ""
+
+
+def test_tui_has_plan_and_sidebar_hooks():
+    """TUI 深度接入点存在（方法/反应变量/侧栏节点 id）。"""
+    assert hasattr(XiaoliTUI, "_tui_plan")
+    assert hasattr(XiaoliTUI, "_update_file_tree")
+    assert hasattr(XiaoliTUI, "_update_session_list")
+    assert "plan_mode" in XiaoliTUI._reactives if hasattr(XiaoliTUI, "_reactives") else True