fix(chv): 完整 Chromium 检测认 CFT 布局 chrome-linux64

Playwright 1.64.1 下的 chrome-linux64.zip 解压为 chrome-linux64/
chrome，旧检查只认 chrome-linux/chrome：数据盘上 403M 完整版
已装好（含 DEPENDENCIES_VALIDATED）仍报未安装、mount_full 误
回落（2026-11-08 构建 #8 驱动实证）。两种布局都认；驱动安装
步在仍未装好时重试一次（客机慢出口 CDN 30 秒超时是抖动）。

cloud/tests/test_chv_opt_stage3.py

@@ -203,6 +203,17 @@ class FullBrowsersDirTest(unittest.TestCase):
             open(exe, "w").write("x")
             self.assertEqual(BROWSER.full_chromium_executable(tmp), exe)
 
+    def test_executable_found_in_cft_layout(self):
+        # Playwright 1.64.1 的 CFT 包解压为 chrome-linux64/chrome。
+        with tempfile.TemporaryDirectory() as tmp:
+            exe_dir = os.path.join(
+                tmp, "chromium-1248", "chrome-linux64")
+            os.makedirs(exe_dir)
+            exe = os.path.join(exe_dir, "chrome")
+            open(exe, "w").write("x")
+            self.assertEqual(BROWSER.full_chromium_executable(tmp), exe)
+            self.assertTrue(BROWSER.full_chromium_present(tmp))
+
     def test_status_reports_data_disk_dir(self):
         with tempfile.TemporaryDirectory() as tmp:
             agent, _c, _h = _agent([FakePage()], tmp,