feat: 完善首次连接账号身份展示

首次连接前读取当前账号昵称和头像
从账号目录安全推导其他账号 wxid 避免账号串号

tests/component/database-connection.test.tsx

@@ -69,6 +69,53 @@ function renderPage(
 }
 
 describe('DatabaseConnectionPage', () => {
+  it('renders a discovered nickname and avatar before connection', () => {
+    const { container } = renderPage({
+      mode: 'automatic',
+      accounts: [
+        {
+          id: 'account-a',
+          accountRoot: 'C:\\fixture\\account-a',
+          directoryName: 'account-a',
+          nickname: '首次识别账号',
+          wxid: 'fixture_account',
+          avatar: 'https://wx.qlogo.cn/fixture/avatar',
+          hasSavedDbKey: false,
+          loginStatus: 'unknown',
+          selectedByInput: true
+        }
+      ]
+    })
+
+    expect(screen.getByText('首次识别账号')).toBeVisible()
+    expect(screen.getByText('fixture_account')).toBeVisible()
+    expect(container.querySelector('.database-account-avatar img')).toHaveAttribute(
+      'src',
+      'https://wx.qlogo.cn/fixture/avatar'
+    )
+  })
+
+  it('shows a directory-derived wxid without pretending profile data is available', () => {
+    renderPage({
+      mode: 'automatic',
+      accounts: [
+        {
+          id: 'account-b',
+          accountRoot: 'C:\\fixture\\wxid_fixture_b_ab12',
+          directoryName: 'wxid_fixture_b_ab12',
+          wxid: 'wxid_fixture',
+          hasSavedDbKey: false,
+          loginStatus: 'other',
+          selectedByInput: false
+        }
+      ],
+      selectedAccountId: ''
+    })
+
+    expect(screen.getByText('微信账号 wxid_fixture')).toBeVisible()
+    expect(screen.getByText('昵称和头像需连接此账号后读取')).toBeVisible()
+  })
+
   it('keeps connect disabled until a valid 64-character key is supplied', () => {
     const { rerender, props } = renderPage()
     expect(screen.getByRole('button', { name: '连接数据库' })).toBeDisabled()

tests/unit/account-discovery.test.ts

@@ -12,6 +12,13 @@ vi.mock('electron', () => ({
 }))
 
 import { discoverAccounts } from '../../src/main/services/account-discovery'
+import {
+  accountDirectoryBelongsToIdentity,
+  deriveAccountWxid
+} from '../../src/main/services/local-account-identity'
+
+const ENCRYPTED_PROFILE_FIXTURE =
+  'AQAAAO94jcgf4UG6tCOnxpkapWihufN03upWNEXBfttmtsNHGfPwTv6d4rHJ5BQ9fTQWVc8QuHn1cCk1TmQ4eYW4iHKHEGgyGn/3mcpxlJIxlkt/y7IFifofGw8UShRYcOa8j59W2EML986dq+OWo/cN19iq3PHiMhbDLugGiWYdeDMAIPI/'
 
 describe('account discovery', () => {
   let root: string
@@ -66,4 +73,48 @@ describe('account discovery', () => {
     expect(result.preselectedAccountId).toBe(result.accounts[0].id)
     expect(result.accounts[0].selectedByInput).toBe(true)
   })
+
+  it('adds the local profile only to its exact account directory before unlock', async () => {
+    const accountRoot = path.join(root, 'fixture_account_ab12')
+    await fs.ensureDir(path.join(accountRoot, 'db_storage'))
+    const profileFile = path.join(root, 'all_users', 'config', 'global_config')
+    await fs.ensureDir(path.dirname(profileFile))
+    await fs.writeFile(profileFile, Buffer.from(ENCRYPTED_PROFILE_FIXTURE, 'base64'))
+
+    const result = await discoverAccounts(root, keyStore as never)
+
+    expect(
+      result.accounts.find((account) => account.directoryName === 'fixture_account_ab12')
+    ).toMatchObject({
+      wxid: 'fixture_account',
+      nickname: '测试账号',
+      avatar: 'https://wx.qlogo.cn/fixture/avatar'
+    })
+    expect(result.accounts.find((account) => account.directoryName === 'account-a')).toMatchObject({
+      wxid: undefined,
+      nickname: undefined,
+      avatar: undefined
+    })
+
+    const directResult = await discoverAccounts(accountRoot, keyStore as never)
+    expect(directResult.accounts[0]).toMatchObject({
+      wxid: 'fixture_account',
+      nickname: '测试账号'
+    })
+  })
+
+  it('uses strict account-directory suffix matching', () => {
+    expect(accountDirectoryBelongsToIdentity('fixture_account', 'fixture_account')).toBe(true)
+    expect(accountDirectoryBelongsToIdentity('fixture_account_ab12', 'fixture_account')).toBe(true)
+    expect(accountDirectoryBelongsToIdentity('fixture_account_z9q2', 'fixture_account')).toBe(true)
+    expect(accountDirectoryBelongsToIdentity('fixture_account_other', 'fixture_account')).toBe(
+      false
+    )
+    expect(accountDirectoryBelongsToIdentity('fixture_account2_ab12', 'fixture_account')).toBe(
+      false
+    )
+    expect(deriveAccountWxid('wxid_iuq1a00d79c212_00fa')).toBe('wxid_iuq1a00d79c212')
+    expect(deriveAccountWxid('a969409112_d784')).toBe('a969409112')
+    expect(deriveAccountWxid('account-a')).toBeUndefined()
+  })
 })