diff --git a/server-rs/crates/shared-contracts/tests/model3d_multiview_request_contract.rs b/server-rs/crates/shared-contracts/tests/model3d_multiview_request_contract.rs
index b3802bcac..c67bf35cc 100644
--- a/server-rs/crates/shared-contracts/tests/model3d_multiview_request_contract.rs
+++ b/server-rs/crates/shared-contracts/tests/model3d_multiview_request_contract.rs
@@ -1,5 +1,8 @@
 use serde_json::json;
-use shared_contracts::model3d::common::Model3dModelVersion;
+use shared_contracts::model3d::common::{
+    Model3dCompression, Model3dExportOrientation, Model3dGeometryQuality, Model3dInputOrientation,
+    Model3dModelVersion, Model3dTextureAlignment, Model3dTextureQuality, Model3dTextureVersion,
+};
 use shared_contracts::model3d::multiview_to_model::{
     Model3dMultiviewInputs, Model3dMultiviewToModelRequest,
 };
@@ -76,3 +79,137 @@ fn multiview_request_rejects_unknown_top_level_fields() {
         "未知字段错误应指出 unknown field，实际为：{error}"
     );
 }
+
+#[test]
+fn multiview_request_round_trips_every_optional_field() {
+    // 全字段往返：钉住 camelCase 字段名、枚举线上取值与 Option 的可省略写法，
+    // 与生成的 TypeScript 绑定保持一致。
+    let payload = json!({
+        "inputs": {
+            "kind": "views",
+            "front": "front.png",
+            "left": "left.png",
+            "back": "back.png",
+            "right": "right.png"
+        },
+        "model": "v3.1-20260211",
+        "modelSeed": 7,
+        "textureSeed": 8,
+        "texture": true,
+        "pbr": true,
+        "textureQuality": "standard",
+        "textureVersion": "v3.0-20250812",
+        "delight": false,
+        "geometryQuality": "detailed",
+        "textureAlignment": "original_image",
+        "faceLimit": 20_000,
+        "autoSize": false,
+        "orientation": "align_image",
+        "quad": false,
+        "smartLowPoly": true,
+        "generateParts": false,
+        "compress": "geometry",
+        "exportUv": true,
+        "exportOrientation": "-y"
+    });
+
+    let request: Model3dMultiviewToModelRequest =
+        serde_json::from_value(payload.clone()).expect("全字段请求应可反序列化");
+
+    match &request.inputs {
+        Model3dMultiviewInputs::Views {
+            front,
+            left,
+            back,
+            right,
+        } => {
+            assert_eq!(front, "front.png");
+            assert_eq!(left.as_deref(), Some("left.png"));
+            assert_eq!(back.as_deref(), Some("back.png"));
+            assert_eq!(right.as_deref(), Some("right.png"));
+        }
+        Model3dMultiviewInputs::TaskId { .. } => panic!("kind=views 不应解成 taskId 变体"),
+    }
+    assert_eq!(request.model, Model3dModelVersion::H31);
+    assert_eq!(request.model_seed, Some(7));
+    assert_eq!(request.texture_seed, Some(8));
+    assert_eq!(request.texture, Some(true));
+    assert_eq!(request.pbr, Some(true));
+    assert_eq!(
+        request.texture_quality,
+        Some(Model3dTextureQuality::Standard)
+    );
+    assert_eq!(request.texture_version, Some(Model3dTextureVersion::V30));
+    assert_eq!(request.delight, Some(false));
+    assert_eq!(
+        request.geometry_quality,
+        Some(Model3dGeometryQuality::Detailed)
+    );
+    assert_eq!(
+        request.texture_alignment,
+        Some(Model3dTextureAlignment::OriginalImage)
+    );
+    assert_eq!(request.face_limit, Some(20_000));
+    assert_eq!(request.auto_size, Some(false));
+    assert_eq!(
+        request.orientation,
+        Some(Model3dInputOrientation::AlignImage)
+    );
+    assert_eq!(request.quad, Some(false));
+    assert_eq!(request.smart_low_poly, Some(true));
+    assert_eq!(request.generate_parts, Some(false));
+    assert_eq!(request.compress, Some(Model3dCompression::Geometry));
+    assert_eq!(request.export_uv, Some(true));
+    assert_eq!(
+        request.export_orientation,
+        Some(Model3dExportOrientation::MinusY)
+    );
+
+    assert_eq!(
+        serde_json::to_value(&request).expect("请求应可回写为 JSON"),
+        payload
+    );
+}
+
+#[test]
+fn multiview_request_round_trips_explicit_nulls() {
+    // 显式 null 是可省略写法之外的另一种合法形态，回写时必须仍是 null 而不是缺字段。
+    let payload = json!({
+        "inputs": { "kind": "taskId", "taskId": "tripo-task-1" },
+        "model": "P2-20260801",
+        "modelSeed": null,
+        "textureSeed": null,
+        "texture": null,
+        "pbr": null,
+        "textureQuality": null,
+        "textureVersion": null,
+        "delight": null,
+        "geometryQuality": null,
+        "textureAlignment": null,
+        "faceLimit": null,
+        "autoSize": null,
+        "orientation": null,
+        "quad": null,
+        "smartLowPoly": null,
+        "generateParts": null,
+        "compress": null,
+        "exportUv": null,
+        "exportOrientation": null
+    });
+
+    let request: Model3dMultiviewToModelRequest =
+        serde_json::from_value(payload.clone()).expect("显式 null 的请求应可反序列化");
+
+    assert!(matches!(
+        request.inputs,
+        Model3dMultiviewInputs::TaskId { .. }
+    ));
+    assert_eq!(request.model, Model3dModelVersion::P2);
+    assert_eq!(request.model_seed, None);
+    assert_eq!(request.export_orientation, None);
+
+    assert_eq!(
+        serde_json::to_value(&request).expect("请求应可回写为 JSON"),
+        payload
+    );
+}