fix: 修复公众号消息读取与 Windows 中文路径兼容

- 支持从 biz_message 分片读取公众号聊天记录
- 在左侧栏增加独立的公众号折叠分组
- 为 Windows 中文数据目录建立 ASCII 路径桥接 (#12)
- 补充公众号分片、侧栏分类和路径桥接测试

tests/component/conversation-sidebar.test.tsx

@@ -0,0 +1,57 @@
+import { render, screen } from '@testing-library/react'
+import userEvent from '@testing-library/user-event'
+import { describe, expect, it, vi } from 'vitest'
+import { ConversationSidebar } from '../../src/renderer/src/components/conversation/ConversationSidebar'
+
+vi.mock('@tanstack/react-virtual', () => ({
+  useVirtualizer: ({ count }: { count: number }) => ({
+    getTotalSize: () => count * 58,
+    getVirtualItems: () =>
+      Array.from({ length: count }, (_, index) => ({
+        index,
+        key: index,
+        start: index * 58,
+        size: 58
+      }))
+  })
+}))
+
+describe('ConversationSidebar', () => {
+  it('keeps official accounts in their own collapsible section', async () => {
+    render(
+      <ConversationSidebar
+        contacts={[
+          {
+            m_nsUsrName: 'gh_fixture',
+            m_nsNickName: '测试公众号',
+            md5: 'official-md5',
+            type: 'user',
+            isOfficialAccount: true
+          },
+          {
+            m_nsUsrName: 'wxid_fixture',
+            m_nsNickName: '测试联系人',
+            md5: 'contact-md5',
+            type: 'user'
+          }
+        ]}
+        selectedContact={null}
+        onSelectContact={vi.fn()}
+        onSearch={vi.fn()}
+        onContentFilter={vi.fn()}
+        width={320}
+        selfInfo={null}
+        dbReady
+        onOpenSettings={vi.fn()}
+        onRefresh={vi.fn(async () => undefined)}
+      />
+    )
+
+    expect(screen.getByRole('button', { name: '公众号 (1)' })).toBeInTheDocument()
+    expect(screen.getByRole('button', { name: '联系人 (1)' })).toBeInTheDocument()
+    expect(screen.queryByText('测试公众号')).not.toBeInTheDocument()
+
+    await userEvent.click(screen.getByRole('button', { name: '公众号 (1)' }))
+    expect(screen.getByText('测试公众号')).toBeInTheDocument()
+  })
+})

tests/unit/wcdb-message-shards.test.ts

@@ -1,5 +1,12 @@
-import { describe, expect, it, vi } from 'vitest'
-import { Wcdb4Client, type Wcdb4Message } from '../../src/main/wcdb4-client'
+import fs from 'fs-extra'
+import os from 'os'
+import path from 'path'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import {
+  resolveWindowsNativeAccountRoot,
+  Wcdb4Client,
+  type Wcdb4Message
+} from '../../src/main/wcdb4-client'
 
 const message = (id: string, year: number, serverId = `server-${id}`): Wcdb4Message => ({
   mesLocalID: id,
@@ -12,6 +19,12 @@ const message = (id: string, year: number, serverId = `server-${id}`): Wcdb4Mess
 })
 
 describe('WCDB message shard pagination', () => {
+  const temporaryDirectories: string[] = []
+
+  afterEach(() => {
+    for (const directory of temporaryDirectories.splice(0)) fs.removeSync(directory)
+  })
+
   it('keeps messages whose local ids repeat across database shards', async () => {
     const cursor = vi.fn(async () => [
       message('1', 2024, 'server-2024'),
@@ -57,4 +70,50 @@ describe('WCDB message shard pagination', () => {
       client.getMessagesAsync('fixture@chatroom', undefined, 1_767_225_600, { limit: 20 })
     ).rejects.toThrow('无法检查历史消息分片')
   })
+
+  it('falls back to biz_message shards for official-account sessions', () => {
+    const root = fs.mkdtempSync(path.join(os.tmpdir(), 'wxe-biz-shards-'))
+    temporaryDirectories.push(root)
+    const messageRoot = path.join(root, 'db_storage', 'message')
+    fs.ensureDirSync(messageRoot)
+    const bizDbPath = path.join(messageRoot, 'biz_message_0.db')
+    fs.writeFileSync(bizDbPath, '')
+
+    const client = Object.assign(Object.create(Wcdb4Client.prototype), {
+      dbStoragePath: path.join(root, 'db_storage'),
+      wcdbGetMessageTableStats: null,
+      wcdbExecQuery: vi.fn(),
+      callJson: vi.fn(() => [{ name: 'Msg_19cde0e21f4f938ca1fcebd7146dbbd2' }])
+    }) as Wcdb4Client
+
+    const stores = Reflect.get(client, 'listMessageStores').call(client, 'gh_23069e016533')
+
+    expect(stores).toEqual([
+      {
+        tableName: 'Msg_19cde0e21f4f938ca1fcebd7146dbbd2',
+        dbPath: bizDbPath
+      }
+    ])
+  })
+
+  it('creates a stable ASCII junction for a Windows account path containing Chinese', () => {
+    const root = fs.mkdtempSync(path.join(os.tmpdir(), 'wxe-path-bridge-'))
+    temporaryDirectories.push(root)
+    const publicRoot = path.join(root, 'Public')
+    const accountRoot = path.join(root, '微信聊天记录', 'wxid_fixture')
+    fs.ensureDirSync(path.join(accountRoot, 'db_storage'))
+
+    const first = resolveWindowsNativeAccountRoot(accountRoot, {
+      platform: 'win32',
+      publicRoot
+    })
+    const second = resolveWindowsNativeAccountRoot(accountRoot, {
+      platform: 'win32',
+      publicRoot
+    })
+
+    expect(first).toBe(second)
+    expect(first).not.toContain('微信聊天记录')
+    expect(fs.realpathSync(first)).toBe(fs.realpathSync(accountRoot))
+  })
 })