test: 全模式功能测试覆盖 (12模式 33项测试)

新增 arc/eng/do/dbg/ctx/xdb/sdb/ndb/dep/tst/sec/rvr 全模式功能测试；
fix do_mode UI 检测中文关键词补全；scripts/install.sh 同步更新。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

test_ctx.py

@@ -0,0 +1,154 @@
+#!/usr/bin/env python3
+"""Ctx Mode 功能测试"""
+
+import sys
+import os
+import tempfile
+import json
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).parent / "lib"))
+
+def test_ctx_enter():
+    """测试上下文管理器初始化"""
+    from air_runtime.modes.ctx_mode import ctx_enter
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        project_root = Path(tmpdir)
+
+        result = ctx_enter(project_root)
+
+        assert "state_path" in result
+        assert Path(result["state_path"]).exists()
+
+        print("✓ 上下文管理器初始化测试通过")
+    return True
+
+
+def test_ctx_estimate_tokens():
+    """测试 Token 估算"""
+    from air_runtime.modes.ctx_mode import estimate_tokens
+
+    # 测试中文
+    chinese_text = "这是一个中文测试文本用于估算 Token 数量"
+    tokens = estimate_tokens(chinese_text)
+    assert tokens > 0
+
+    # 测试英文
+    english_text = "This is an English text for token estimation"
+    tokens_en = estimate_tokens(english_text)
+    assert tokens_en > 0
+
+    # 测试代码
+    code_text = "def main():\n    print('hello world')\n    return 0"
+    tokens_code = estimate_tokens(code_text)
+    assert tokens_code > 0
+
+    print(f"✓ Token 估算测试通过，中文: {tokens}, 英文: {tokens_en}, 代码: {tokens_code}")
+    return True
+
+
+def test_ctx_validate_compression():
+    """测试压缩质量校验"""
+    from air_runtime.modes.ctx_mode import validate_compression
+
+    original = """
+    # ADR-0001 决策
+    我们选择使用 PostgreSQL 数据库
+
+    # TODO 实现
+    - [ ] 创建数据库连接池
+    - [ ] 实现 CRUD 接口
+
+    # INV-1 约束
+    必须使用原子写入
+    """
+
+    # 好的摘要（包含关键信息）
+    good_summary = "ADR-0001: PostgreSQL, TODO: 连接池/CRUD, INV-1: 原子写入"
+    result = validate_compression(original, good_summary)
+    assert result["ok"] == True
+
+    # 坏的摘要（丢失关键信息）
+    bad_summary = "选择了 PostgreSQL"
+    result_bad = validate_compression(original, bad_summary)
+    # 可能不 ok，因为丢失了 TODO 和 INV
+
+    print("✓ 压缩质量校验测试通过")
+    return True
+
+
+def test_ctx_compress_fallback():
+    """测试三级降级压缩"""
+    from air_runtime.modes.ctx_mode import compress_with_fallback, CompressionLevel
+
+    # 创建大文本
+    long_text = "这是测试内容\n" * 1000
+
+    result = compress_with_fallback(long_text, max_tokens=100)
+
+    # 应该返回结果
+    assert "level" in result
+    assert "result" in result
+    assert result["level"] in [CompressionLevel.RETRY, CompressionLevel.FALLBACK_MODEL, CompressionLevel.TRUNCATE]
+
+    print(f"✓ 三级降级压缩测试通过，压缩级别: {result['level']}")
+    return True
+
+
+def test_ctx_lock():
+    """测试 compactor 锁"""
+    from air_runtime.modes.ctx_mode import acquire_compactor_lock
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        lock_path = Path(tmpdir) / "test.lock"
+
+        # 首次获取锁应该成功
+        acquired = acquire_compactor_lock(lock_path)
+        assert acquired == True
+        assert lock_path.exists()
+
+        # 再次获取应该失败（锁已被持有）
+        acquired2 = acquire_compactor_lock(lock_path)
+        assert acquired2 == False
+
+        print("✓ Compactor 锁测试通过")
+    return True
+
+
+def main():
+    print("=" * 50)
+    print("Ctx Mode 功能测试")
+    print("=" * 50)
+
+    tests = [
+        ("上下文管理器初始化", test_ctx_enter),
+        ("Token 估算", test_ctx_estimate_tokens),
+        ("压缩质量校验", test_ctx_validate_compression),
+        ("三级降级压缩", test_ctx_compress_fallback),
+        ("Compactor 锁", test_ctx_lock),
+    ]
+
+    passed = 0
+    failed = 0
+
+    for name, test_fn in tests:
+        try:
+            test_fn()
+            passed += 1
+        except Exception as e:
+            print(f"✗ {name} 失败: {e}")
+            import traceback
+            traceback.print_exc()
+            failed += 1
+
+    print("=" * 50)
+    print(f"测试结果: {passed} 通过, {failed} 失败")
+    print("=" * 50)
+
+    return failed == 0
+
+
+if __name__ == "__main__":
+    success = main()
+    sys.exit(0 if success else 1)