release: v1.2.1 — login captcha, docs site, and bug fixes

Add slider captcha for web login, VitePress documentation on GitHub Pages,
and fixes for gallery delete refresh, pagination jump, and copy-format persistence.

server/api/auth/captcha/confirm.post.ts

@@ -0,0 +1,19 @@
+import { createApiError } from '../../../utils/api-error'
+import { confirmLoginCaptcha } from '../../../utils/login-captcha'
+
+interface ConfirmBody {
+  id?: string
+  captchaPosition?: number
+}
+
+export default defineEventHandler(async (event) => {
+  const body = await readBody<ConfirmBody>(event)
+  const id = body?.id?.trim() ?? ''
+  const position = Number(body?.captchaPosition)
+
+  if (!id || !confirmLoginCaptcha(id, position)) {
+    createApiError(event, 'INVALID_REQUEST', '滑块未对齐，请重试', 400)
+  }
+
+  return { success: true }
+})