The host clears seats and closes rooms

Two lobby-lifecycle gaps from tonight's duels (a token lost to a
client bug left an unkickable ghost seat holding a chair in VQJW).
kickSeat: the host removes any other seat from an unstarted room —
the kick is a ledger line so restarts replay it, and a kicked live
socket is set adrift with notice. abandonRoom: the host dissolves a
lobby or a finished game; every member is notified and detached, and
the ledger is archived to rooms-abandoned/ — moved, never deleted.
The lobby shows hosts a ✕ per seat and an abandon-room control.
Proven live: kick with notice, kick surviving a server restart, and
abandonment archiving its ledger.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RCWSTnb1KYTPyL4GmhGnF

packages/web/src/net.svelte.ts

@@ -447,6 +447,14 @@ class Net {
           }
           break;
         }
+        case "kicked":
+          this.log = [...this.log, { text: `— the host cleared your seat in ${msg.roomId} —`, turn: null, notable: false }];
+          this.leaveLocal();
+          break;
+        case "roomAbandoned":
+          this.log = [...this.log, { text: `— the host closed room ${msg.roomId} —`, turn: null, notable: false }];
+          this.leaveLocal();
+          break;
         case "transferCode":
           this.transferCode = { code: msg.code, expiresAt: msg.expiresAt };
           break;
@@ -565,6 +573,14 @@ class Net {
     this.send({ type: "addBot", ...(style ? { style } : {}), ...(tier ? { tier } : {}) });
   }
 
+  kickSeat(name: string): void {
+    this.send({ type: "kickSeat", name });
+  }
+
+  abandonRoom(): void {
+    this.send({ type: "abandonRoom" });
+  }
+
   rollTableDie(): void {
     this.send({ type: "rollDie" });
   }
@@ -636,6 +652,19 @@ class Net {
   }
 
   /** Forget the remembered seat and return to the lobby. */
+  /** Client-side teardown when the SERVER detached us (kick, abandon). */
+  leaveLocal(): void {
+    localStorage.removeItem(SEAT_KEY);
+    this.roomId = null;
+    this.roomIdPending = null;
+    this.view = null;
+    this.started = false;
+    this.players = [];
+    this.token = null;
+    this.spectating = false;
+    this.audience = 0;
+  }
+
   leave(): void {
     this.send({ type: "leave" }); // detach server-side too (frees a gallery seat)
     localStorage.removeItem(SEAT_KEY);