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>

lib/air_runtime/modes/do_mode.py

@@ -16,14 +16,19 @@ from air_runtime.contracts import WorkerResult, now_iso
 from air_runtime.utils import sanitize_task_id, session_stamp
 
 
-# P1-20: UI 任务检测关键词
+# P1-20: UI 任务检测关键词（支持中英文）
 UI_TASK_INDICATORS = (
+    # 英文关键词
     "gui", "ui", "render", "layout", "dialog", "osd",
     "overlay", "visual", "screenshot", "display",
     "widget", "pane", "toolbar", "settings_dialog",
     "canvas", "button", "window", "popup", "menu",
     "drm", "kms", "opengl", "vulkan", "frontend",
     "react", "vue", "angular", "web", "css", "html",
+    # 中文关键词
+    "界面", "UI", "界面设计", "前端", "界面开发",
+    "按钮", "对话框", "窗口", "菜单", "控件",
+    "渲染", "布局", "登录界面", "界面组件",
 )