chore: fix errenous windows paths from previous migration

packages/desktop/app/javascripts/Main/FileBackups/FileBackupsManager.ts

@@ -62,6 +62,10 @@ export class FilesBackupManager implements FileBackupsDevice {
     return uuid
   }
 
+  async joinPaths(...paths: string[]): Promise<string> {
+    return path.join(...paths)
+  }
+
   public async migrateLegacyFileBackupsToNewStructure(newLocation: string): Promise<void> {
     const legacyLocation = await this.getLegacyFilesBackupsLocation()
     if (!legacyLocation) {

packages/desktop/app/javascripts/Main/Remote/RemoteBridge.ts

@@ -76,6 +76,7 @@ export class RemoteBridge implements CrossProcessBridge {
       migrateLegacyFileBackupsToNewStructure: this.migrateLegacyFileBackupsToNewStructure.bind(this),
       getUserDocumentsDirectory: this.getUserDocumentsDirectory.bind(this),
       monitorPlaintextBackupsLocationForChanges: this.monitorPlaintextBackupsLocationForChanges.bind(this),
+      joinPaths: this.joinPaths.bind(this),
     }
   }
 
@@ -235,6 +236,10 @@ export class RemoteBridge implements CrossProcessBridge {
     return this.fileBackups.monitorPlaintextBackupsLocationForChanges(backupsDirectory)
   }
 
+  joinPaths(...paths: string[]): Promise<string> {
+    return this.fileBackups.joinPaths(...paths)
+  }
+
   askForMediaAccess(type: 'camera' | 'microphone'): Promise<boolean> {
     return this.media.askForMediaAccess(type)
   }

packages/desktop/app/javascripts/Renderer/DesktopDevice.ts

@@ -153,6 +153,10 @@ export class DesktopDevice extends WebOrDesktopDevice implements DesktopDeviceIn
     return this.remoteBridge.monitorPlaintextBackupsLocationForChanges(backupsDirectory)
   }
 
+  joinPaths(...paths: string[]): Promise<string> {
+    return this.remoteBridge.joinPaths(...paths)
+  }
+
   async performHardReset(): Promise<void> {
     console.error('performHardReset is not yet implemented')
   }