refactor: 个人自用，移除登录与云同步全链路

站点只给本人用，云乐坊 SSO 授权、收藏/历史云同步、获客归因和账号切换记账都没有收益，却被登录状态检查和同步失败提示持续打扰。

- 删除 useYunlefunAuth / yunlefunAuth / yunlefunSsoConfig / yunlefunAuth 适配器、useUserDataSync / userDataSync / userData 适配器、三个 client 插件与 /auth/callback 回调页
- 抽出 adapters/cloudbase.ts，让「反馈一下」和匿名筛选信号不再依赖登录态；cook-feedback 云函数保留
- 删除 cook-user-data 云函数与 cook_user_data 权限规则，移除 @yunlefun/sso 依赖
- 「我的」页删掉登录按钮、账号卡、四个统计格和退出登录；「关于」页删掉项目作者、致谢名单和上游宣传链接
- 本地收藏/历史与导出导入保留，删除同步专用的 lastUid 记账

取舍见 docs/decisions/0005-drop-login-and-sync.md

test/userDataStore.test.ts

@@ -1,15 +1,12 @@
-import type { RecipeItem } from '../apps/web/app/types'
-import type { DbRecipeItem } from '../apps/web/app/utils/db'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
-import { createCloudbaseUserDataRemote, USER_DATA_FUNCTION } from '../apps/web/app/adapters/userData'
 import { favoriteEntries, setFavoriteEntries, toggleFavorite } from '../apps/web/app/composables/store/favorite'
 import { addRecipeHistory, clearRecipeHistories, recipeHistories, removeRecipeHistory } from '../apps/web/app/composables/store/history'
-import { exportLocalUserData, importLocalUserData, localUserData } from '../apps/web/app/composables/store/userData'
+import { exportLocalUserData, importLocalUserData } from '../apps/web/app/composables/store/userData'
 import { userDataMeta } from '../apps/web/app/composables/store/userDataMeta'
 
 const NOW = 1_800_000_000_000
 
-function recipe(name: string, id?: number): DbRecipeItem {
+function recipe(name: string, id?: number) {
   return { id, name, stuff: [], tools: [] }
 }
 
@@ -17,7 +14,7 @@ beforeEach(() => {
   vi.useFakeTimers({ now: NOW })
   setFavoriteEntries([])
   recipeHistories.value = []
-  userDataMeta.value = { favoriteRemovals: [], historyRemovals: [], historyClearedAt: 0, lastUid: '' }
+  userDataMeta.value = { favoriteRemovals: [], historyRemovals: [], historyClearedAt: 0 }
   return () => vi.useRealTimers()
 })
 
@@ -88,51 +85,3 @@ describe('export / import', () => {
     expect(favoriteEntries.value).toEqual([])
   })
 })
-
-describe('localUserData', () => {
-  it('only rewrites the last uid when it changes', () => {
-    const before = userDataMeta.value
-    localUserData.writeLastUid('')
-    expect(userDataMeta.value).toBe(before)
-    localUserData.writeLastUid('u1')
-    expect(localUserData.readLastUid()).toBe('u1')
-  })
-})
-
-describe('createCloudbaseUserDataRemote', () => {
-  const document = {
-    version: 1 as const,
-    favorites: [{ id: 1, time: NOW }],
-    favoriteRemovals: [],
-    histories: [{ recipe: { name: 'A', stuff: [], tools: [] } as RecipeItem, time: NOW }],
-    historyRemovals: [],
-    historyClearedAt: 0,
-    updatedAt: NOW,
-  }
-
-  it('reads through the cook-user-data function without naming a uid', async () => {
-    const callFunction = vi.fn(async () => ({ ok: true, document: { favorites: [] } }))
-    const remote = createCloudbaseUserDataRemote(callFunction)
-
-    await expect(remote.read('u1')).resolves.toEqual({ favorites: [] })
-    expect(callFunction).toHaveBeenCalledWith(USER_DATA_FUNCTION, { action: 'get' })
-  })
-
-  it('returns null when the account has no document', async () => {
-    const remote = createCloudbaseUserDataRemote(async () => ({ ok: true, document: null }))
-    await expect(remote.read('u1')).resolves.toBeNull()
-  })
-
-  it('writes the whole document', async () => {
-    const callFunction = vi.fn(async () => ({ ok: true, updatedAt: NOW }))
-    await createCloudbaseUserDataRemote(callFunction).write('u1', document)
-    expect(callFunction).toHaveBeenCalledWith(USER_DATA_FUNCTION, { action: 'set', document })
-  })
-
-  it('surfaces function failures', async () => {
-    const remote = createCloudbaseUserDataRemote(async () => ({ ok: false, code: 'LOGIN_REQUIRED' }))
-    await expect(remote.read('u1')).rejects.toThrow('LOGIN_REQUIRED')
-    await expect(remote.write('u1', document)).rejects.toThrow('LOGIN_REQUIRED')
-    await expect(createCloudbaseUserDataRemote(async () => null).read('u1')).rejects.toThrow('unknown')
-  })
-})