release: v1.1.3 — dual-domain separation and URL options

Add admin/image domain separation with host isolation middleware,
optional hide-folder public URLs, GitHub release update check, and
Lucky/Nginx deployment docs. Switch license to GPL-3.0-only.

server/api/version/latest.get.ts

@@ -0,0 +1,29 @@
+import { requireAdminAuth } from '../../utils/access'
+import {
+  fetchLatestGitHubRelease,
+  isVersionNewer
+} from '../../utils/app-version'
+
+export default defineEventHandler(async (event) => {
+  await requireAdminAuth(event)
+
+  const config = useRuntimeConfig(event)
+  const currentVersion = String(config.appVersion ?? '')
+  const latest = await fetchLatestGitHubRelease()
+
+  if (!latest) {
+    return {
+      currentVersion,
+      latestVersion: null,
+      updateAvailable: false,
+      releaseUrl: null
+    }
+  }
+
+  return {
+    currentVersion,
+    latestVersion: latest.latestVersion,
+    updateAvailable: isVersionNewer(latest.latestVersion, currentVersion),
+    releaseUrl: latest.releaseUrl
+  }
+})