feat(amneziawg): swap the app's integration points to the embedded manager

Hard cutover, part 2: every real call site that used to drive
internal/amneziawg's kernel-module Manager now drives
internal/amneziawgnet's instead --

- internal/web/job/amneziawg_job.go: the reconcile cron job. Traffic/
  online-status accounting is dropped entirely (not ported) -- once a
  peer's traffic is relayed through Xray's own SOCKS5 inbound, it's an
  ordinary Xray user and XrayTrafficJob's existing generic stats polling
  already handles it, with zero AmneziaWG-specific code.
- internal/web/runtime/local.go: the immediate-apply CRUD path
  (AddInbound/DelInbound/updateAmneziaWGInbound).
- internal/web/web.go: panel shutdown's StopAll.

internal/amneziawgnet.Manager gains Remove(id) to match the kernel-module
Manager's shape at these call sites (Reconcile alone doesn't cover a
single-inbound removal outside a full reconcile pass).

internal/web/service/inbound_amneziawg.go's applyLocalAmneziaWG needed no
change: it already goes through runtime.Runtime.UpdateInbound, which now
resolves to the updated local.go path.

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

internal/web/web.go

@@ -16,7 +16,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/mhsanaei/3x-ui/v3/internal/amneziawg"
+	"github.com/mhsanaei/3x-ui/v3/internal/amneziawgnet"
 	"github.com/mhsanaei/3x-ui/v3/internal/config"
 	"github.com/mhsanaei/3x-ui/v3/internal/eventbus"
 	"github.com/mhsanaei/3x-ui/v3/internal/logger"
@@ -689,7 +689,7 @@ func (s *Server) stop(stopXray bool, stopTgBot bool) error {
 	if stopXray {
 		_ = s.xrayService.StopXray()
 		mtproto.GetManager().StopAll()
-		amneziawg.GetManager().StopAll()
+		amneziawgnet.GetManager().StopAll()
 	}
 	if s.cron != nil {
 		s.cron.Stop()