feat(mtproto): add MTProto (FakeTLS) protocol via managed mtg sidecar (#5076)

* feat(mtproto): add MTProto (FakeTLS) protocol via managed mtg sidecar

Xray-core has no mtproto proxy, so mtproto inbounds run as standalone
mtg (9seconds/mtg) sidecar processes managed by the panel — one per
inbound — and are excluded from the generated Xray config entirely.

- model: MTProto protocol constant, validator, and FakeTLS secret
  helpers (GenerateFakeTLSSecret/HealMtprotoSecret)
- mtproto package: per-inbound mtg process manager with reconcile,
  graceful stop, and best-effort Prometheus traffic scraping
- runtime: delegate mtproto inbounds to the mtg manager instead of the
  Xray gRPC API; skip mtproto when building the Xray config
- web: boot reconcile + StopAll wiring, periodic reconcile/traffic job,
  port-conflict transport, secret healing on inbound add/update
- sub: tg:// proxy share-link generation
- frontend: protocol option, Zod schema, Protocol tab (FakeTLS domain +
  regenerable secret), info-modal link, and i18n
- provisioning: fetch mtg v2.2.8 in install.sh, DockerInit.sh, and the
  Linux + Windows release workflows

* fix

* fix

* fix: address Copilot review comments on mtproto PR

- web/web.go: create NewMtprotoJob once and reuse for cron + initial run
- mtproto/manager.go: StopAll cleans up per-inbound config files on shutdown
- mtproto/manager.go: CollectTraffic releases mutex before HTTP scrapes to
  avoid blocking Ensure/Reconcile/Remove during network I/O
- database/model/model.go: panic on crypto/rand failure in mtprotoRandomMiddle
  instead of silently producing a weak all-zero secret
- install.sh: fix chmod to handle renamed bin/mtg-linux-arm on armv5/v6/v7

web/runtime/local.go

@@ -8,6 +8,7 @@ import (
 	"sync"
 
 	"github.com/mhsanaei/3x-ui/v3/database/model"
+	"github.com/mhsanaei/3x-ui/v3/mtproto"
 	"github.com/mhsanaei/3x-ui/v3/xray"
 )
 
@@ -44,6 +45,13 @@ func (l *Local) withAPI(fn func(api *xray.XrayAPI) error) error {
 }
 
 func (l *Local) AddInbound(_ context.Context, ib *model.Inbound) error {
+	if ib.Protocol == model.MTProto {
+		inst, ok := mtproto.InstanceFromInbound(ib)
+		if !ok {
+			return nil
+		}
+		return mtproto.GetManager().Ensure(inst)
+	}
 	body, err := json.MarshalIndent(ib.GenXrayInboundConfig(), "", "  ")
 	if err != nil {
 		return err
@@ -54,6 +62,10 @@ func (l *Local) AddInbound(_ context.Context, ib *model.Inbound) error {
 }
 
 func (l *Local) DelInbound(_ context.Context, ib *model.Inbound) error {
+	if ib.Protocol == model.MTProto {
+		mtproto.GetManager().Remove(ib.Id)
+		return nil
+	}
 	return l.withAPI(func(api *xray.XrayAPI) error {
 		return api.DelInbound(ib.Tag)
 	})
@@ -68,12 +80,18 @@ func (l *Local) UpdateInbound(ctx context.Context, oldIb, newIb *model.Inbound)
 }
 
 func (l *Local) AddUser(_ context.Context, ib *model.Inbound, userMap map[string]any) error {
+	if ib.Protocol == model.MTProto {
+		return nil
+	}
 	return l.withAPI(func(api *xray.XrayAPI) error {
 		return api.AddUser(string(ib.Protocol), ib.Tag, userMap)
 	})
 }
 
 func (l *Local) RemoveUser(_ context.Context, ib *model.Inbound, email string) error {
+	if ib.Protocol == model.MTProto {
+		return nil
+	}
 	return l.withAPI(func(api *xray.XrayAPI) error {
 		return api.RemoveUser(ib.Tag, email)
 	})