[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/internal/engine_authsession.go

@@ -0,0 +1,108 @@
+package internal
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+	"google.golang.org/protobuf/types/known/timestamppb"
+
+	"github.com/netbirdio/netbird/client/internal/auth/sessionwatch"
+	cProto "github.com/netbirdio/netbird/client/proto"
+	"github.com/netbirdio/netbird/client/system"
+)
+
+// ApplySessionDeadline propagates the absolute SSO session deadline carried on
+// LoginResponse / SyncResponse to both the watcher (for the edge-triggered
+// warning) and the status recorder (for the SubscribeStatus / Status RPC
+// snapshot the UI consumes).
+//
+// The wire field is 3-state:
+//   - nil                        → snapshot carries no info; keep the
+//     previously-anchored deadline (no-op)
+//   - explicit zero (s=0, n=0)   → peer is not SSO-registered or expiry is
+//     disabled; clear both sinks
+//   - valid timestamp            → new deadline; arm watcher, expose on
+//     status recorder
+//
+// Deadline sanity-checks live in sessionwatch.Watcher.Update. Any rejected
+// value is treated as a clear on both sinks: the alternative — leaving the
+// previously-known deadline in place — risks the UI confidently displaying
+// a stale "expires in X" while the server has actually invalidated it.
+func (e *Engine) ApplySessionDeadline(ts *timestamppb.Timestamp) {
+	if ts == nil {
+		return
+	}
+	var deadline time.Time
+	// Explicit zero (seconds=0 AND nanos=0) is the sentinel for "disabled".
+	// Everything else flows through Watcher.Update, whose sanity-checks
+	// reject out-of-range / pre-epoch / far-future / too-stale values and
+	// clear on rejection.
+	if ts.GetSeconds() != 0 || ts.GetNanos() != 0 {
+		deadline = ts.AsTime().UTC()
+	}
+	if e.sessionWatcher == nil {
+		return
+	}
+	// Watcher.Update owns the propagation to the status recorder (the
+	// SubscribeStatus / Status snapshot the UI reads): a set writes the
+	// deadline, a clear or a sanity-check rejection writes the zero value.
+	// Keeping a single writer is what stops the recorder from drifting out
+	// of sync with the warning timers.
+	if err := e.sessionWatcher.Update(deadline); err != nil {
+		log.Errorf("auth session deadline rejected: %v, clearing", err)
+		e.statusRecorder.PublishEvent(
+			cProto.SystemEvent_ERROR,
+			cProto.SystemEvent_AUTHENTICATION,
+			"session deadline rejected",
+			"",
+			map[string]string{sessionwatch.MetaSessionDeadlineRejected: err.Error()},
+		)
+	}
+}
+
+// DismissSessionWarning records the user's "Dismiss" click on the
+// T-WarningLead interactive notification and suppresses the upcoming
+// T-FinalWarningLead fallback for the current deadline. No-op when the
+// watcher is not running or holds no deadline.
+func (e *Engine) DismissSessionWarning() {
+	if e.sessionWatcher == nil {
+		return
+	}
+	e.sessionWatcher.Dismiss()
+}
+
+// ExtendAuthSession asks the management server to refresh the SSO session
+// expiry deadline using the supplied JWT, then mirrors the new deadline into
+// the daemon's state. The tunnel is untouched; no resync, no reconnect.
+//
+// Returns the new absolute UTC deadline (or zero time when the server
+// reports the peer is not eligible for extension).
+func (e *Engine) ExtendAuthSession(ctx context.Context, jwtToken string) (time.Time, error) {
+	if jwtToken == "" {
+		return time.Time{}, errors.New("jwt token is required")
+	}
+	if e.mgmClient == nil {
+		return time.Time{}, errors.New("management client is not initialised")
+	}
+
+	info, err := system.GetInfoWithChecks(ctx, e.checks)
+	if err != nil {
+		log.Warnf("failed to collect system info for session extend: %v", err)
+		info = system.GetInfo(ctx)
+	}
+
+	resp, err := e.mgmClient.ExtendAuthSession(info, jwtToken)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("extend auth session on management: %w", err)
+	}
+
+	e.ApplySessionDeadline(resp.GetSessionExpiresAt())
+
+	if resp.GetSessionExpiresAt().IsValid() {
+		return resp.GetSessionExpiresAt().AsTime().UTC(), nil
+	}
+	return time.Time{}, nil
+}