feat(n7web): enhance control workflows and status feedback

src/cognitive_agent/application/assistant_capabilities.py

@@ -1850,7 +1850,7 @@ class AssistantCapabilityCatalog:
             ]
             if not peripherals:
                 return CapabilityAnswer(
-                    "工程支持通过 NFC 绑定并学习红外外设；当前没有同时满足“已启用且对应 NFC 卡在场”的可执行外设能力。",
+                    "工程支持通过 NFC 绑定并学习红外外设；当前没有同时满足“已学习、已启用且保留有效 NFC 绑定”的可执行外设能力。",
                     "peripherals",
                 )
             labels = [
@@ -2321,7 +2321,9 @@ class AssistantCapabilityCatalog:
         try:
             nfc = dict(self._nfc_provider()) if self._nfc_provider else {}
         except Exception:  # noqa: BLE001 - optional NFC reader may be offline
-            return [], "unavailable"
+            # The reader only reports current presence. Durable bindings remain
+            # callable even while the reader is offline or no card is present.
+            nfc = {}
         card = nfc.get("card") if isinstance(nfc.get("card"), Mapping) else {}
         active_uid = _normalized_nfc_uid(card.get("uid")) if isinstance(card, Mapping) else ""
         peripherals: list[dict[str, object]] = []
@@ -2350,7 +2352,7 @@ class AssistantCapabilityCatalog:
                         active_uid and card_uid and active_uid == card_uid
                     ),
                     "assistant_callable": bool(
-                        learned and enabled and active_uid and card_uid and active_uid == card_uid
+                        learned and enabled and card_uid
                     ),
                 }
             )