refactor(backup): enhance backup functionality with direct backup and legacy backup support (#13030)

### What this PR does

This PR introduces several enhancements to the backup functionality:

1. **Direct Backup**: Implements efficient backup methods that copy
IndexedDB and Local Storage directories directly, avoiding JSON
serialization for better performance
2. **Legacy Backup Rename**: Renames "LAN Transfer Backup" to "Legacy
Backup" for clearer terminology
3. **Component Refactoring**: Splits the large DataSettings.tsx into
smaller components
4. **New Icons**: Adds Joplin and Siyuan icon components

### Before this PR:

- Backup only supported JSON-based serialization
- "LAN Transfer Backup" terminology was used
- All data settings were in a single large component

### After this PR:

- Supports both direct (file copy) and JSON backup formats
- Uses "Legacy Backup" terminology for the former LAN Transfer feature
- Data settings are modularized with separate components

### Why we need it and why was done in this way

The tradeoffs were made:
- Direct backup is faster but may not work across different app versions
- Legacy backup (JSON-based) ensures compatibility but is slower

### Breaking changes

None.

### Special notes for your reviewer

- The DataSettings.tsx was refactored into multiple files - please
review the component structure
- Direct backup format includes metadata for version compatibility
- **Testing status**: macOS backup and restore tested. Windows and Linux
testing pending.

### Checklist

- [x] PR: Expressive enough for future contributors
- [x] Code: Simple and human-readable
- [x] Refactor: Code is cleaner than before
- [x] Upgrade: Impact considered
- [x] Documentation: Not required for this backend/feature change

### Release note

```release-note
- Add direct backup mode, significantly improving backup and restore speed
```

Author: kangfenmao

packages/shared/IpcChannel.ts

@@ -246,7 +246,7 @@ export enum IpcChannel {
   Backup_DeleteS3File = 'backup:deleteS3File',
   Backup_CheckS3Connection = 'backup:checkS3Connection',
   Backup_CreateLanTransferBackup = 'backup:createLanTransferBackup',
-  Backup_DeleteTempBackup = 'backup:deleteTempBackup',
+  Backup_DeleteLanTransferBackup = 'backup:deleteLanTransferBackup',
 
   // zip
   Zip_Compress = 'zip:compress',

src/main/index.ts

@@ -149,7 +149,12 @@ if (!app.requestSingleInstanceLock()) {
       app.dock?.hide()
     }
 
+    // Check for backup restore marker and complete restoration (highest priority, before window creation)
+    const { BackupManager } = await import('./services/BackupManager')
+    await BackupManager.handleStartupRestore()
+
     const mainWindow = windowService.createMainWindow()
+
     new TrayService()
 
     // Setup macOS application menu

src/main/ipc.ts

@@ -92,7 +92,7 @@ import { themeService } from './services/ThemeService'
 import VertexAIService from './services/VertexAIService'
 import { setOpenLinkExternal } from './services/WebviewService'
 import { windowService } from './services/WindowService'
-import { calculateDirectorySize, getDataPath, getResourcePath } from './utils'
+import { calculateDirectorySize, getResourcePath } from './utils'
 import { decrypt, encrypt } from './utils/aes'
 import {
   getCacheDir,
@@ -104,7 +104,6 @@ import {
   untildify
 } from './utils/file'
 import { updateAppDataConfig } from './utils/init'
-import { closeAllDataConnections } from './utils/lifecycle'
 import { getCpuName, getDeviceType, getHostname } from './utils/system'
 import { compress, decompress } from './utils/zip'
 
@@ -495,15 +494,7 @@ export async function registerIpc(mainWindow: BrowserWindow, app: Electron.App)
   })
 
   // Reset all data (factory reset)
-  // Best-effort: close handles then delete. Failures are logged but not thrown,
-  // because the caller must always proceed to relaunchApp() — process exit
-  // releases any remaining handles, and services auto-recreate on next start.
-  ipcMain.handle(IpcChannel.App_ResetData, async () => {
-    await closeAllDataConnections()
-    await fs.promises.rm(getDataPath(), { recursive: true, force: true }).catch((e) => {
-      logger.warn('Failed to remove Data directory (will be cleaned up on restart)', e as Error)
-    })
-  })
+  ipcMain.handle(IpcChannel.App_ResetData, () => backupManager.resetData())
 
   // check for update
   ipcMain.handle(IpcChannel.App_CheckForUpdate, async () => {
@@ -610,7 +601,7 @@ export async function registerIpc(mainWindow: BrowserWindow, app: Electron.App)
   ipcMain.handle(IpcChannel.Backup_DeleteS3File, backupManager.deleteS3File.bind(backupManager))
   ipcMain.handle(IpcChannel.Backup_CheckS3Connection, backupManager.checkS3Connection.bind(backupManager))
   ipcMain.handle(IpcChannel.Backup_CreateLanTransferBackup, backupManager.createLanTransferBackup.bind(backupManager))
-  ipcMain.handle(IpcChannel.Backup_DeleteTempBackup, backupManager.deleteTempBackup.bind(backupManager))
+  ipcMain.handle(IpcChannel.Backup_DeleteLanTransferBackup, backupManager.deleteLanTransferBackup.bind(backupManager))
 
   // file
   ipcMain.handle(IpcChannel.File_Open, fileManager.open.bind(fileManager))