task-127(记录与版本中心): 实现软件版本列表加载

新增 version-model.ts 与 version-api.ts(GET /api/admin/versions)。

TDD: task-127.test.ts 8 用例 RED→GREEN。

admin-frontend-vue/src/pages/records/version-api.ts

@@ -0,0 +1,11 @@
+/** 软件版本列表加载适配（任务 127）：GET /api/admin/versions。 */
+import { http } from '@/api/http'
+import { parseSoftwareVersionList } from './version-model.ts'
+import type { SoftwareVersionList } from './version-dto.ts'
+
+export const SOFTWARE_VERSIONS_ENDPOINT = '/api/admin/versions'
+
+export async function fetchSoftwareVersions(): Promise<SoftwareVersionList> {
+  const { data } = await http.get<unknown>(SOFTWARE_VERSIONS_ENDPOINT)
+  return parseSoftwareVersionList(data)
+}

admin-frontend-vue/src/pages/records/version-model.ts

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+/** 软件版本列表加载模型（任务 127）：解析 /api/admin/versions data.items(snake)；纯逻辑。 */
+import { unwrap } from '../../api/envelope.ts'
+import { type SoftwareVersionItem, type SoftwareVersionList } from './version-dto.ts'
+
+function text(value: unknown): string {
+  return typeof value === 'string' ? value.trim() : ''
+}
+
+function numberOrNull(value: unknown): number | null {
+  return typeof value === 'number' && Number.isFinite(value) ? Math.floor(value) : null
+}
+
+/** 解析单条软件版本行；缺 id 视为无效。 */
+export function toSoftwareVersionItem(raw: unknown): SoftwareVersionItem | null {
+  if (!raw || typeof raw !== 'object') return null
+  const r = raw as Record<string, unknown>
+  const id = numberOrNull(r.id)
+  if (id === null) return null
+  return {
+    id,
+    version: text(r.version),
+    fileUrl: text(r.file_url ?? r.fileUrl),
+    createdAt: text(r.created_at ?? r.createdAt),
+  }
+}
+
+/** 归一化版本列表负载为前端结果；缺省回空列表。 */
+export function parseSoftwareVersionList(payload: unknown): SoftwareVersionList {
+  const data = unwrap<unknown>(payload)
+  const record = data && typeof data === 'object' ? (data as Record<string, unknown>) : {}
+  const items = Array.isArray(record.items)
+    ? record.items.map((raw) => toSoftwareVersionItem(raw)).filter((item): item is SoftwareVersionItem => item !== null)
+    : []
+  return { items }
+}