diff --git a/cmd/verstak-gui/app.go b/cmd/verstak-gui/app.go
index 4c306d6..d384e53 100644
--- a/cmd/verstak-gui/app.go
+++ b/cmd/verstak-gui/app.go
@@ -14,6 +14,7 @@ import (
 
 	"verstak/internal/core/actions"
 	"verstak/internal/core/activity"
+	"verstak/internal/core/config"
 	"verstak/internal/core/files"
 	"verstak/internal/core/notes"
 	"verstak/internal/core/nodes"
@@ -835,6 +836,93 @@ func (a *App) Search(query string) ([]SearchResultDTO, error) {
 	return out, nil
 }
 
+// ============================================================
+// Sync
+// ============================================================
+
+type SyncStatusDTO struct {
+	Configured   bool   `json:"configured"`
+	ServerURL    string `json:"serverUrl"`
+	DeviceID     string `json:"deviceId"`
+	UnpushedOps  int    `json:"unpushedOps"`
+	LastSyncAt   string `json:"lastSyncAt"`
+}
+
+func (a *App) SyncStatus() (*SyncStatusDTO, error) {
+	serverURL, apiKey, _, lastSyncAt, err := a.sync.GetState()
+	if err != nil {
+		return &SyncStatusDTO{}, nil
+	}
+	unpushed, _ := a.sync.GetUnpushedOps()
+	cfg, _ := config.Load(a.vault)
+	dto := &SyncStatusDTO{
+		Configured:  serverURL != "" && apiKey != "",
+		ServerURL:   serverURL,
+		UnpushedOps: len(unpushed),
+		LastSyncAt:  lastSyncAt,
+	}
+	if cfg != nil {
+		dto.DeviceID = cfg.Sync.DeviceID
+	}
+	return dto, nil
+}
+
+func (a *App) SyncConfigure(serverURL, apiKey string) error {
+	if err := a.sync.SetState(serverURL, apiKey); err != nil {
+		return err
+	}
+	// Persist to vault config.
+	cfg, err := config.Load(a.vault)
+	if err != nil {
+		return err
+	}
+	cfg.Sync.ServerURL = serverURL
+	cfg.Sync.APIKey = apiKey
+	return config.Save(a.vault, cfg)
+}
+
+func (a *App) SyncNow() (map[string]interface{}, error) {
+	serverURL, apiKey, lastRev, _, err := a.sync.GetState()
+	if err != nil || serverURL == "" || apiKey == "" {
+		return nil, fmt.Errorf("sync not configured")
+	}
+
+	deviceID := ""
+	if cfg, err := config.Load(a.vault); err == nil {
+		deviceID = cfg.Sync.DeviceID
+	}
+
+	client := syncsvc.NewClient(serverURL, apiKey, deviceID, a.vault)
+
+	// Push unpushed ops.
+	unpushed, err := a.sync.GetUnpushedOps()
+	if err != nil {
+		return nil, fmt.Errorf("get ops: %w", err)
+	}
+	pushResult := &syncsvc.PushResponse{}
+	if len(unpushed) > 0 {
+		pushResult, err = client.Push(unpushed)
+		if err != nil {
+			return nil, fmt.Errorf("push: %w", err)
+		}
+		if err := a.sync.MarkPushed(pushResult.Accepted); err != nil {
+			return nil, fmt.Errorf("mark pushed: %w", err)
+		}
+	}
+
+	// Pull remote ops.
+	pullResult, err := client.Pull(lastRev)
+	if err != nil {
+		return nil, fmt.Errorf("pull: %w", err)
+	}
+
+	return map[string]interface{}{
+		"pushed":         len(pushResult.Accepted),
+		"pulled":         len(pullResult.Ops),
+		"serverRevision": pullResult.ServerRevision,
+	}, nil
+}
+
 // ============================================================
 // File Dialogs (Wails v2 Runtime)
 // ============================================================