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).

internal/store/postgres/channel_core.go

@@ -496,7 +496,7 @@ func scanChannel(row rowScanner) (domain.Channel, error) {
 
 func channelScanDest(ch *domain.Channel, rights, reactionPolicy *string, wallpaper **string) []any {
 	return []any{
-		&ch.ID, &ch.AccessHash, &ch.CreatorUserID, &ch.Title, &ch.About, &ch.Username, &ch.Verified,
+		&ch.ID, &ch.AccessHash, &ch.CreatorUserID, &ch.Title, &ch.About, &ch.Username, &ch.Verified, &ch.Scam, &ch.Fake, &ch.Gigagroup,
 		&ch.Broadcast, &ch.Megagroup, &ch.Forum, &ch.ForumTabs, &ch.Autotranslation, &ch.RestrictedSponsored, &ch.BroadcastMessagesAllowed, &ch.SendPaidMessagesStars, &ch.NoForwards, &ch.JoinToSend, &ch.JoinRequest, &ch.Signatures, &ch.PreHistoryHidden, &ch.ParticipantsHidden, &ch.AntiSpam, &ch.HasLink, &ch.LinkedChatID, &ch.LinkedCommunityID, &ch.Monoforum, &ch.LinkedMonoforumID, &ch.SlowmodeSeconds, &ch.BoostsUnrestrict, rights,
 		reactionPolicy, &ch.Color.HasColor, &ch.Color.Color, &ch.Color.BackgroundEmojiID, &ch.ProfileColor.HasColor, &ch.ProfileColor.Color, &ch.ProfileColor.BackgroundEmojiID, &ch.EmojiStatus.DocumentID, &ch.EmojiStatus.Until,
 		wallpaper, &ch.ParticipantsCount, &ch.AdminsCount, &ch.KickedCount, &ch.BannedCount, &ch.TopMessageID,