[client/ui] Replace fyne UI with Wails (rename ui-wails to ui)

Removes the legacy fyne-based client/ui implementation and renames the
Wails replacement (client/ui-wails) to take its place at client/ui. Go
imports, frontend bindings, CI workflows, goreleaser configs and the
windows .syso icon path are updated to follow the rename.

client/ui/services/update.go

@@ -0,0 +1,70 @@
+//go:build !android && !ios && !freebsd && !js
+
+package services
+
+import (
+	"context"
+	"time"
+
+	"github.com/wailsapp/wails/v3/pkg/application"
+
+	"github.com/netbirdio/netbird/client/proto"
+)
+
+// UpdateResult mirrors TriggerUpdateResponse: Success false carries an error
+// message in ErrorMsg.
+type UpdateResult struct {
+	Success  bool   `json:"success"`
+	ErrorMsg string `json:"errorMsg"`
+}
+
+// Update groups the RPCs that drive the enforced-update install flow.
+type Update struct {
+	conn DaemonConn
+}
+
+func NewUpdate(conn DaemonConn) *Update {
+	return &Update{conn: conn}
+}
+
+// Quit asks the host application to exit. The /update page calls this once
+// the daemon-side installer has reported success, mirroring the legacy
+// Fyne UI's app.Quit() in showInstallerResult. Schedules the actual exit
+// off the calling goroutine so the JS-side caller's response can return
+// before the runtime tears down.
+func (s *Update) Quit() {
+	go func() {
+		time.Sleep(100 * time.Millisecond)
+		application.Get().Quit()
+	}()
+}
+
+func (s *Update) Trigger(ctx context.Context) (UpdateResult, error) {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return UpdateResult{}, err
+	}
+	resp, err := cli.TriggerUpdate(ctx, &proto.TriggerUpdateRequest{})
+	if err != nil {
+		return UpdateResult{}, err
+	}
+	return UpdateResult{
+		Success:  resp.GetSuccess(),
+		ErrorMsg: resp.GetErrorMsg(),
+	}, nil
+}
+
+func (s *Update) GetInstallerResult(ctx context.Context) (UpdateResult, error) {
+	cli, err := s.conn.Client()
+	if err != nil {
+		return UpdateResult{}, err
+	}
+	resp, err := cli.GetInstallerResult(ctx, &proto.InstallerResultRequest{})
+	if err != nil {
+		return UpdateResult{}, err
+	}
+	return UpdateResult{
+		Success:  resp.GetSuccess(),
+		ErrorMsg: resp.GetErrorMsg(),
+	}, nil
+}