三个入口的seed参数在TS契约里改用bigint

- seed 是 i64，JS number 表示不了全部取值却又没有范围校验，客户端传 64 位值会被静默舍入
- text_to_model / image_to_model / multiview_to_model 的 image_seed、model_seed、texture_seed 由 number|null 改为 bigint|null
- 同步重新生成的 ts-rs 绑定，仅这三个字段变化

packages/shared/src/contracts/model3d/image-to-model/Model3dImageToModelParams.ts

@@ -17,8 +17,8 @@ import type { Model3dTextureVersion } from '../common/Model3dTextureVersion';
 export type Model3dImageToModelParams = {
   model: Model3dModelVersion;
   enableImageAutofix?: boolean | null;
-  modelSeed?: number | null;
-  textureSeed?: number | null;
+  modelSeed?: bigint | null;
+  textureSeed?: bigint | null;
   texture?: boolean | null;
   pbr?: boolean | null;
   textureQuality?: Model3dTextureQuality | null;

packages/shared/src/contracts/model3d/multiview-to-model/Model3dMultiviewToModelRequest.ts

@@ -12,8 +12,8 @@ import type { Model3dMultiviewInputs } from './Model3dMultiviewInputs';
 export type Model3dMultiviewToModelRequest = {
   inputs: Model3dMultiviewInputs;
   model: Model3dModelVersion;
-  modelSeed?: number | null;
-  textureSeed?: number | null;
+  modelSeed?: bigint | null;
+  textureSeed?: bigint | null;
   texture?: boolean | null;
   pbr?: boolean | null;
   textureQuality?: Model3dTextureQuality | null;

packages/shared/src/contracts/model3d/text-to-model/Model3dTextToModelParams.ts

@@ -16,9 +16,9 @@ export type Model3dTextToModelParams = {
   prompt: string;
   model: Model3dModelVersion;
   negativePrompt?: string | null;
-  imageSeed?: number | null;
-  modelSeed?: number | null;
-  textureSeed?: number | null;
+  imageSeed?: bigint | null;
+  modelSeed?: bigint | null;
+  textureSeed?: bigint | null;
   texture?: boolean | null;
   pbr?: boolean | null;
   textureQuality?: Model3dTextureQuality | null;