fix: sync correct collectible username projection

internal/rpc/self_user_projection.go

@@ -0,0 +1,25 @@
+package rpc
+
+import (
+	"context"
+
+	"github.com/iamxvbaba/td/tg"
+
+	"telesrv/internal/domain"
+)
+
+// tgSelfUserWithUsernames is the narrow single-object projection used by
+// authorization results and self-profile updates. Those constructors already
+// carry a complete User, so it must include the username registry without
+// querying unrelated story or bot-verification read models.
+//
+// When a collectible registry vector exists, applyUsernamesToPeerObjects clears
+// the legacy scalar username. Official clients treat the scalar and vector as
+// alternative representations; emitting both makes TDLib reject the username
+// set as malformed.
+func (r *Router) tgSelfUserWithUsernames(ctx context.Context, u domain.User) *tg.User {
+	self := r.tgSelfUser(u)
+	users := []tg.UserClass{self}
+	r.applyUsernamesToPeerObjects(ctx, users, nil)
+	return self
+}