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/utils/login-captcha.test.ts

@@ -0,0 +1,27 @@
+import { describe, expect, it } from 'vitest'
+import {
+  __peekLoginCaptchaTargetForTests,
+  __resetLoginCaptchaStoreForTests,
+  confirmLoginCaptcha,
+  createLoginCaptchaChallenge,
+  verifyLoginCaptcha
+} from './login-captcha'
+
+describe('login-captcha', () => {
+  it('requires confirm before login verify', () => {
+    __resetLoginCaptchaStoreForTests()
+    const { id } = createLoginCaptchaChallenge()
+    const target = __peekLoginCaptchaTargetForTests(id)!
+    expect(verifyLoginCaptcha(id, target)).toBe(false)
+    expect(confirmLoginCaptcha(id, target)).toBe(true)
+    expect(verifyLoginCaptcha(id, target)).toBe(true)
+    expect(verifyLoginCaptcha(id, target)).toBe(false)
+  })
+
+  it('rejects position outside tolerance', () => {
+    __resetLoginCaptchaStoreForTests()
+    const { id } = createLoginCaptchaChallenge()
+    const target = __peekLoginCaptchaTargetForTests(id)!
+    expect(confirmLoginCaptcha(id, target + 10)).toBe(false)
+  })
+})