refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

internal/apps/openflare/dashboard/helpers.go

@@ -0,0 +1,54 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package dashboard
+
+import (
+	"strings"
+	"time"
+
+	ofws "github.com/Rain-kl/Wavelet/internal/apps/openflare/websocket"
+	"github.com/Rain-kl/Wavelet/internal/model"
+)
+
+const (
+	nodeStatusOnline  = "online"
+	nodeStatusOffline = "offline"
+	nodeStatusPending = "pending"
+)
+
+func computeNodeStatus(node *model.OpenFlareNode) string {
+	if node == nil {
+		return nodeStatusOffline
+	}
+	if node.LastSeenAt == nil || node.LastSeenAt.IsZero() {
+		return nodeStatusPending
+	}
+	if time.Since(*node.LastSeenAt) > model.NodeOfflineThreshold {
+		return nodeStatusOffline
+	}
+	return nodeStatusOnline
+}
+
+func nodeViewLastSeenAt(node *model.OpenFlareNode) any {
+	if node == nil {
+		return time.Time{}
+	}
+	nodeType := strings.TrimSpace(node.NodeType)
+	if nodeType == "" {
+		nodeType = "edge_node"
+	}
+	if nodeType == "tunnel_relay" && ofws.IsRelayConnected(node.NodeID) {
+		return ofws.RelayWSConnectedLastSeenValue
+	}
+	if nodeType == "tunnel_client" && ofws.IsFlaredConnected(node.NodeID) {
+		return ofws.FlaredWSConnectedLastSeenValue
+	}
+	if ofws.IsAgentConnected(node.NodeID) {
+		return ofws.AgentWSConnectedLastSeenValue
+	}
+	if node.LastSeenAt == nil {
+		return time.Time{}
+	}
+	return *node.LastSeenAt
+}