fix(web): reveal NFC peripherals after detection

tests/unit/test_self_extension_nfc_sync_contract.py

@@ -102,3 +102,17 @@ def test_device_card_surfaces_extension_toy_mqtt_delivery() -> None:
     assert "extensionToySnapshot.last_error" in apply_toy
     assert "applyExtensionToySnapshot(value.extension_toy" in apply_nfc
     assert "正在准备 extension/toy 消息" in apply_nfc
+
+
+def test_homepage_only_reveals_nfc_devices_detected_in_this_run() -> None:
+    source = SOURCE_PATH.read_text(encoding="utf-8")
+    unified = _function_source(
+        source,
+        "  function buildUnifiedExtensionSync() {",
+        "\n  function init()",
+    )
+
+    assert "detected_nfc_ids" in source
+    assert "const detectedNfcIds = new Set(" in unified
+    assert "detectedNfcIds.has(normalizeCardUid(device.cardUid))" in unified
+    assert "检测到已绑定的 NFC 后，外设将在本次运行期间持续显示" in unified