Replace from-scratch rewrite with real ngoduykhanh/wireguard-ui fork

The from-scratch Go rewrite had unresolved bugs (missing go.sum, UI
404s, path issues) from being built without a working local Go
toolchain to verify against. Switching strategy: use the actual
upstream wireguard-ui codebase (proven, battle-tested single-server
manager) as the base, and extend it for multi-server support instead
of re-deriving everything from zero.

Kept our own installers (bootstrap.sh, update.sh, scripts/install.sh,
scripts/proxmox-install.sh) - these still apply, just need updating
to build/install the upstream module layout instead of the old
cmd/wireguard-ui-multi structure.

Module path intentionally left as upstream's own
(github.com/ngoduykhanh/wireguard-ui) for now to avoid touching every
internal import; revisit if this needs to be fully rebranded.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

store/jsondb/jsondb_wake_on_lan.go

@@ -0,0 +1,88 @@
+package jsondb
+
+import (
+	"encoding/json"
+	"fmt"
+	"path"
+
+	"github.com/ngoduykhanh/wireguard-ui/model"
+	"github.com/ngoduykhanh/wireguard-ui/util"
+)
+
+func (o *JsonDB) GetWakeOnLanHosts() ([]model.WakeOnLanHost, error) {
+	var hosts []model.WakeOnLanHost
+
+	// read all client json file in "hosts" directory
+	records, err := o.conn.ReadAll(model.WakeOnLanHostCollectionName)
+	if err != nil {
+		return hosts, err
+	}
+
+	// build the ClientData list
+	for _, f := range records {
+		host := model.WakeOnLanHost{}
+
+		// get client info
+		if err := json.Unmarshal(f, &host); err != nil {
+			return hosts, fmt.Errorf("cannot decode client json structure: %v", err)
+		}
+
+		// create the list of hosts and their qrcode data
+		hosts = append(hosts, host)
+	}
+
+	return hosts, nil
+}
+
+func (o *JsonDB) GetWakeOnLanHost(macAddress string) (*model.WakeOnLanHost, error) {
+	host := &model.WakeOnLanHost{
+		MacAddress: macAddress,
+	}
+	resourceName, err := host.ResolveResourceName()
+	if err != nil {
+		return nil, err
+	}
+
+	err = o.conn.Read(model.WakeOnLanHostCollectionName, resourceName, host)
+	if err != nil {
+		host = nil
+	}
+	return host, err
+}
+
+func (o *JsonDB) DeleteWakeOnHostLanHost(macAddress string) error {
+	host := &model.WakeOnLanHost{
+		MacAddress: macAddress,
+	}
+	resourceName, err := host.ResolveResourceName()
+	if err != nil {
+		return err
+	}
+
+	return o.conn.Delete(model.WakeOnLanHostCollectionName, resourceName)
+}
+
+func (o *JsonDB) SaveWakeOnLanHost(host model.WakeOnLanHost) error {
+	resourceName, err := host.ResolveResourceName()
+	if err != nil {
+		return err
+	}
+
+	wakeOnLanHostPath := path.Join(path.Join(o.dbPath, model.WakeOnLanHostCollectionName), resourceName+".json")
+	output := o.conn.Write(model.WakeOnLanHostCollectionName, resourceName, host)
+	err = util.ManagePerms(wakeOnLanHostPath)
+	if err != nil {
+		return err
+	}
+
+	return output
+}
+
+func (o *JsonDB) DeleteWakeOnHost(host model.WakeOnLanHost) error {
+	resourceName, err := host.ResolveResourceName()
+	if err != nil {
+		return err
+	}
+
+	return o.conn.Delete(model.WakeOnLanHostCollectionName, resourceName)
+}