fix: harden conversational mode draft revisions

tests/unit/test_codex_assistant_service.py

@@ -468,6 +468,49 @@ def test_pending_mode_draft_update_uses_fast_configuration_route_without_codex()
     assert "调整待保存" in result["answer"]
 
 
+def test_pending_mode_draft_change_into_percentage_is_a_configuration_update() -> None:
+    context = {
+        "name": "观影模式",
+        "source_request_id": "req-viewing-preview",
+        "vehicle_id": "denza_n7",
+    }
+
+    update = _authorize_vehicle_request(
+        "把观影模式的遮阳帘变成100%",
+        CONTROL_TERMS,
+        context,
+    )
+    question = _authorize_vehicle_request(
+        "把观影模式的遮阳帘变成100%吗",
+        CONTROL_TERMS,
+        context,
+    )
+
+    assert update.reason == "explicit_mode_profile_draft_update"
+    assert question.reason == "mode_profile_query"
+
+
+def test_pending_mode_draft_noop_answer_says_target_was_already_set() -> None:
+    result = _sample_mode_preview_result(
+        "观影模式",
+        generation_source="draft_revision",
+    )
+    draft = result["mode_profile_draft"]
+    assert isinstance(draft, dict)
+    draft.update(
+        {
+            "requested_operation_count": 1,
+            "changed_operation_count": 0,
+        }
+    )
+
+    answer = CodexAssistantService._mode_profile_preview_answer(result, True)
+
+    assert "该项原本已是目标状态" in answer
+    assert "已保持不变并重新校验" in answer
+    assert "已调整待保存" not in answer
+
+
 def test_active_draft_context_does_not_hijack_an_ordinary_question() -> None:
     client = FakeCodexClient()
     assistant = CodexAssistantService(client)
@@ -1037,6 +1080,8 @@ def test_safe_vehicle_result_exposes_mode_preview_without_command_flow() -> None
             "vehicle_id": "denza_n7",
             "domains": ["roof", "interior_light", "ambient_light"],
             "operation_count": 4,
+            "requested_operation_count": 1,
+            "changed_operation_count": 0,
             "command_flow": {"raw_can": "must-not-cross-tool-boundary"},
         },
         "intent_ir": {
@@ -1065,6 +1110,8 @@ def test_safe_vehicle_result_exposes_mode_preview_without_command_flow() -> None
         "vehicle_id": "denza_n7",
         "domains": ["roof", "interior_light", "ambient_light"],
         "operation_count": 4,
+        "requested_operation_count": 1,
+        "changed_operation_count": 0,
     }
     assert safe["actions"] == [
         {