feat(platform): close AI expense value loop

Add tenant-safe value, telemetry, connector, commercial, and production-readiness foundations.

server/tests/test_expense_application_preview_decisions.py

@@ -275,6 +275,32 @@ def test_server_preview_decision_detects_field_added_after_issuance() -> None:
         assert {item["field_key"] for item in feedback.changed_fields_json} >= {"transport_mode"}
 
 
+def test_server_preview_decision_records_cleared_suggestion_as_rejected() -> None:
+    client, session_factory = build_client()
+    with session_factory() as db:
+        seed_employee(db)
+
+    issued = issue_preview(client, request_id="issue-preview-rejected-field")
+    payload = build_action_payload(issued)
+    payload["message"] = payload["message"].replace("出行方式：飞机\n", "")
+    payload["context_json"]["application_preview"]["fields"]["transportMode"] = ""
+    response = client.post(
+        "/api/v1/reimbursements/application-preview-action",
+        headers=auth_headers(),
+        json=payload,
+    )
+
+    assert response.status_code == 200, response.text
+    with session_factory() as db:
+        feedback = db.scalar(select(AIDecisionFeedback))
+        assert feedback is not None
+        assert feedback.feedback_type == "rejected"
+        assert feedback.verification_status == "server_verified"
+        assert {item["field_key"] for item in feedback.changed_fields_json} == {
+            "transport_mode"
+        }
+
+
 def test_server_preview_decision_rejects_cross_session_replay_without_writes() -> None:
     client, session_factory = build_client()
     with session_factory() as db: