fix: auto updater logic

CHANGELOG.md

@@ -10,16 +10,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [0.9.5] 2025-11-07
 ### Fixed
 - Fix macOS postinstall script where it was not properly handling the `--scan-root` argument.
-- **macOS**: Complete auto-update implementation - now properly mounts DMG, copies app bundle to /Applications, clears quarantine, and restarts
+- **macOS**: Complete auto-update implementation - extracts binary from DMG and uses go-update for atomic replacement
 - **Windows**: Fix critical file locking bug by integrating go-update library for proper binary replacement
-- **Linux**: Implement staging directory approach with atomic binary swap on startup
+- **Linux**: Use go-update library for atomic binary replacement with automatic rollback
 - Add ELF binary verification for Linux updates to prevent corrupted downloads
 
 ### Changed
-- macOS updates use rsync for atomic installation with fallback to cp
-- Windows updates properly handle running executable replacement
-- Linux updates use `.next` staging file with atomic swap on next launch
-- Improve error handling and logging throughout update process
+- **All platforms now use go-update library** for consistent, reliable binary replacement
+- macOS updates extract and replace just the binary inside .app bundle (simpler and more reliable)
+- Windows and Linux updates also use go-update for atomic operations
+- Linux auto-updates now detect webkit version (webkit40/webkit41) based on distro version
+- All platforms have automatic rollback on update failure built into go-update
+- Significantly simplified update code by using proven library instead of custom approaches
 
 ## [0.9.4] 2025-11-06
 ### Changed

backend/service/update_service.go

@@ -45,4 +45,10 @@ type UpdateService interface {
 
 	// SetContext sets the context for the service
 	SetContext(ctx context.Context)
+
+	// VerifyUpdateSuccess checks if an update completed successfully and cleans up backup
+	VerifyUpdateSuccess() error
+
+	// CheckForFailedUpdate checks if the previous update failed and performs rollback if needed
+	CheckForFailedUpdate() error
 }