The great simplification: every vintage gate collapses, the count restarts at 1

All 50 rooms were retired (backed up on the droplet and in Spaces), so no
ledger needs an old branch to replay: forty revisions of deckRev gates
fold into one canonical ruleset — the newest behavior everywhere. The
ward's arming, the idiot's steering, the lazy illusion roll, the legacy
redirection swap, and the flat wave all leave with their gates; RULES_REV
restarts at 1 for whenever the rules fork again. Old-vintage test pins go
with them. The opening screen now quietly drops seats whose rooms the
server no longer knows, instead of listing them "unreachable" forever.

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

packages/web/src/net.svelte.ts

@@ -418,6 +418,18 @@ class Net {
             if (g.yourTurn && !was) this.notifyTurn(g);
             this.lastYourTurn.set(key, g.yourTurn);
           }
+          // A seat the server answered for but did not list is gone — the
+          // room was deleted (or the seat's token voided). Quietly drop it
+          // from the ledger rather than showing "unreachable" forever.
+          // (The server checks at most 50 seats per ask; never prune blind.)
+          if (this.seats.length <= 50) {
+            const listed = new Set((msg.games as GameSummary[]).map((g) => `${g.roomId}:${g.name}`));
+            const kept = this.seats.filter((s) => listed.has(`${s.roomId}:${s.name}`));
+            if (kept.length !== this.seats.length) {
+              this.seats = kept;
+              saveSeats(this.seats);
+            }
+          }
           break;
         }
         case "error":