refactor: 只保留 Web，移除 Capacitor 原生壳

删除 android/、ios/ 两个 Capacitor 原生工程与 capacitor.config.ts、
ionic.config.json，以及 scripts/android、scripts/ios.sh 构建脚本；
根与 apps/web 的 @capacitor/* 依赖和相关 npm scripts 一并移除。

Web 侧去掉原生分支：登录只走云乐坊容器授权面板或顶层重定向，
暗色模式不再改原生状态栏，移除 Android 物理返回键处理。

保留 @nuxtjs/ionic（Web UI 框架）、云乐坊 window.ylf 桥接与 PWA。

决策记录见 docs/decisions/0004-web-only.md。

test/yunlefunAuthAdapter.test.ts

@@ -1,30 +1,12 @@
 import type { AcquisitionContext, SsoAuthorizationResult } from '@yunlefun/sso'
 import type { YunlefunSsoConfig } from '../apps/web/app/utils/yunlefunSsoConfig'
-import { Browser } from '@capacitor/browser'
-import { Preferences } from '@capacitor/preferences'
 import { SsoIdentityAdoptionError } from '@yunlefun/sso/browser'
-import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { describe, expect, it, vi } from 'vitest'
 import {
   createCloudbaseIdentityAdapter,
-  createNativeYunlefunAuthorizationAdapter,
   createWebYunlefunAuthorizationAdapter,
 } from '../apps/web/app/adapters/yunlefunAuth'
 
-vi.mock('@capacitor/browser', () => ({
-  Browser: {
-    close: vi.fn(),
-    open: vi.fn(),
-  },
-}))
-
-vi.mock('@capacitor/preferences', () => ({
-  Preferences: {
-    get: vi.fn(async () => ({ value: null })),
-    remove: vi.fn(),
-    set: vi.fn(),
-  },
-}))
-
 const config: YunlefunSsoConfig = {
   cloudbaseEnv: 'yunlefun-production',
   exchange: {
@@ -135,41 +117,3 @@ describe('cloudbase identity adapter', () => {
     await expect(identity.signOut()).rejects.toThrow('CloudBase sign-out failed')
   })
 })
-
-describe('native authorization adapter', () => {
-  beforeEach(() => {
-    vi.clearAllMocks()
-  })
-
-  it('clears the pending transaction when authorization is cancelled', async () => {
-    const nativeConfig: YunlefunSsoConfig = {
-      ...config,
-      redirect: {
-        ...config.redirect,
-        clientId: 'cook-mobile',
-        redirectUri: 'https://cook.yunyoujun.cn/auth/callback?platform=native',
-      },
-    }
-    const adapter = createNativeYunlefunAuthorizationAdapter(nativeConfig, async () => null)
-
-    await adapter.start()
-    expect(Preferences.set).toHaveBeenCalledOnce()
-    expect(Browser.open).toHaveBeenCalledOnce()
-
-    await adapter.cancel()
-    expect(Preferences.remove).toHaveBeenCalledWith({
-      key: 'cook:sso:v3:native-transaction',
-    })
-  })
-
-  it('serializes acquisition into the actual native browser SSO URL', async () => {
-    const adapter = createNativeYunlefunAuthorizationAdapter(config, async () => null, () => acquisition)
-    await adapter.start()
-    const url = new URL(vi.mocked(Browser.open).mock.calls[0]![0].url)
-    expect(JSON.parse(url.searchParams.get('acquisition')!)).toEqual(acquisition)
-    expect(url.searchParams.get('client_id')).toBe('cook-web')
-    expect(url.searchParams.get('code_challenge_method')).toBe('S256')
-    const transaction = JSON.parse(vi.mocked(Preferences.set).mock.calls[0]![0].value)
-    expect(transaction.acquisition).toEqual(acquisition)
-  })
-})