admin: gift granting, collectible attribute/number control, and Layer 228 moderation tools

Admin console additions (Layer 228):
- Give Gifts: dedicated tab with sorted Lottie/TGS gift picker + inline form; grant any catalog gift to a user/channel from 777000 (no charge)
- Upgraded/collectible delivery: mint a unique gift with admin-selected model/pattern/backdrop and custom number, or random/auto (DB FK + UNIQUE(gift_id,num) enforce invariants)
- SCAM/FAKE flags for users/channels (migration 0136) with configurable profile warning (TELESRV_SCAM_WARNING/TELESRV_FAKE_WARNING)
- Support toggle, force channel settings incl. gigagroup (migration 0137), username management, cosmetic color/emoji-status
- Emoji admin tab (custom emoji list + document IDs + Lottie/TGS preview)
- Bot management; soft UI / dark theme
Wired through Router -> admin.Service -> adminapi -> BFF -> React panel (en/zh/ru).

cmd/telesrv/main.go

@@ -820,6 +820,7 @@ func run(logger *zap.Logger) error {
 			Sender:       loginEmailSender,
 		}))
 	updatesService := updates.NewService(updateStateStore, updateEventStore, updates.WithLogger(logger.Named("app").Named("updates")))
+	rpc.SetModerationWarnings(cfg.ScamWarning, cfg.FakeWarning)
 	router := rpc.New(rpc.Config{
 		DC:                       cfg.DC,
 		IP:                       cfg.AdvertiseIP,
@@ -921,7 +922,9 @@ func run(logger *zap.Logger) error {
 		ChannelNotifier: router,
 		Messages:        messagesService,
 		Gifts:           giftsService,
+		GiftGranter:     router,
 		Bots:            botsService,
+		Emoji:           filesService,
 	})
 	// bot session 撤销、在线通知与 @ChatBot 流式草稿推送经 router 实现（需 tg.* 边界），
 	// router 创建后注入。