feat(shared): 转发 AGC 模型目录 ts-rs 绑定

- 新增 packages/shared/src/llm/modelCatalog.ts，re-export Rust 生成的目录 DTO 与枚举
- 根 index.ts 增加 export type * from './llm/modelCatalog'，AGC 从 @genarrative/shared 根导入

packages/shared/src/index.ts

@@ -10,6 +10,7 @@ export type * from './contracts/hyper3d';
 export * from './contracts/payment';
 export * from './contracts/runtime';
 export * from './http';
+export type * from './llm/modelCatalog';
 export * from './llm/narrativeLanguage';
 export * from './llm/parsers';
 export * from './stores/createProfileWalletStore';

packages/shared/src/llm/modelCatalog.ts

@@ -0,0 +1,12 @@
+/**
+ * AGC LLM 模型目录契约（Rust `shared-contracts::llm_catalog` 的 ts-rs 生成物）。
+ *
+ * 前端不再手写第二份 `ClientLlmModel`：可用 / 不可用分桶、`reason` 枚举与
+ * `agentMode` / `protocol` 联合类型都以这里为准。
+ */
+export type { AgcAgentMode } from '../contracts/generated/AgcAgentMode';
+export type { AgcModelProtocol } from '../contracts/generated/AgcModelProtocol';
+export type { LlmModelsResponse } from '../contracts/generated/LlmModelsResponse';
+export type { LlmModelSummary } from '../contracts/generated/LlmModelSummary';
+export type { LlmModelUnavailableReason } from '../contracts/generated/LlmModelUnavailableReason';
+export type { LlmUnavailableModel } from '../contracts/generated/LlmUnavailableModel';