[client] UI refactor (#6069)

Refactor UI

---------

Co-authored-by: Eduard Gert <kontakt@eduardgert.de>
Co-authored-by: braginini <bangvalo@gmail.com>
Co-authored-by: Pascal Fischer <32096965+pascal-fischer@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: riccardom <riccardomanfrin@gmail.com>

client/ui/services/autostart.go

@@ -0,0 +1,52 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/wailsapp/wails/v3/pkg/application"
+)
+
+// Autostart facade over Wails' AutostartManager. The OS login-item registration
+// is the single source of truth; nothing is mirrored to preferences.
+type Autostart struct {
+	mgr *application.AutostartManager
+}
+
+func NewAutostart(mgr *application.AutostartManager) *Autostart {
+	return &Autostart{mgr: mgr}
+}
+
+func (a *Autostart) Supported(_ context.Context) bool {
+	_, err := a.mgr.Status()
+	return !errors.Is(err, application.ErrAutostartNotSupported)
+}
+
+// IsEnabled returns false without error on unsupported platforms.
+func (a *Autostart) IsEnabled(_ context.Context) (bool, error) {
+	enabled, err := a.mgr.IsEnabled()
+	if err != nil {
+		if errors.Is(err, application.ErrAutostartNotSupported) {
+			return false, nil
+		}
+		return false, fmt.Errorf("read autostart state: %w", err)
+	}
+	return enabled, nil
+}
+
+// SetEnabled takes effect on the next login, not immediately.
+func (a *Autostart) SetEnabled(_ context.Context, enabled bool) error {
+	if enabled {
+		if err := a.mgr.Enable(); err != nil {
+			return fmt.Errorf("enable autostart: %w", err)
+		}
+		return nil
+	}
+	if err := a.mgr.Disable(); err != nil {
+		return fmt.Errorf("disable autostart: %w", err)
+	}
+	return nil
+}