立项配置版本管理优化（回滚逻辑、UI、下载功能）

frontend/src/api/studies.ts

@@ -1,7 +1,10 @@
 import { apiGet, apiPatch, apiPost, apiDelete, apiPut } from "./axios";
 import type { ApiListResponse, Study } from "../types/api";
 import type {
+  StudySetupConfigCheckoutBranchPayload,
+  StudySetupConfigDraftActionPayload,
   StudySetupConfigPublishPayload,
+  StudySetupConfigMergeMainPayload,
   StudySetupConfigResponse,
   StudySetupConfigRollbackPayload,
   StudySetupConfigUpsertPayload,
@@ -42,3 +45,17 @@ export const deleteStudySetupConfigVersion = (studyId: string, targetVersion: nu
 
 export const rollbackStudySetupConfig = (studyId: string, payload: StudySetupConfigRollbackPayload) =>
   apiPost<StudySetupConfigResponse>(`/api/v1/studies/${studyId}/setup-config/rollback`, payload, { suppressErrorMessage: true });
+
+export const checkoutStudySetupConfigBranchDraft = (studyId: string, payload: StudySetupConfigCheckoutBranchPayload) =>
+  apiPost<StudySetupConfigResponse>(`/api/v1/studies/${studyId}/setup-config/draft/checkout-branch`, payload, {
+    suppressErrorMessage: true,
+  });
+
+export const clearStudySetupConfigDraft = (studyId: string, payload: StudySetupConfigDraftActionPayload) =>
+  apiPost<StudySetupConfigResponse>(`/api/v1/studies/${studyId}/setup-config/draft/clear`, payload, { suppressErrorMessage: true });
+
+export const refillStudySetupConfigDraft = (studyId: string, payload: StudySetupConfigDraftActionPayload) =>
+  apiPost<StudySetupConfigResponse>(`/api/v1/studies/${studyId}/setup-config/draft/refill`, payload, { suppressErrorMessage: true });
+
+export const mergeStudySetupConfigToMain = (studyId: string, payload: StudySetupConfigMergeMainPayload) =>
+  apiPost<StudySetupConfigResponse>(`/api/v1/studies/${studyId}/setup-config/merge-main`, payload, { suppressErrorMessage: true });