feat(cli+broker): kick, ban, unban, bans commands

Broker WS handlers:
- kick: disconnect peer(s) by name, --stale duration, or --all.
  Authz: owner or admin only. Closes WS + marks presence disconnected.
- ban: kick + set revokedAt on mesh.member. Hello already rejects
  revoked members, so ban is instant and permanent until unban.
- unban: clear revokedAt. Peer can rejoin with their existing keypair.
- list_bans: return all revoked members for a mesh.

Session-id dedup (previous commit): handleHello disconnects ghost
presences with matching (meshId, sessionId) before inserting the new
one. Eliminates duplicate entries after broker restarts.

CLI (alpha.37):
- claudemesh kick <peer|--stale 30m|--all>
- claudemesh ban/unban <peer>
- claudemesh bans [--json]
- Uses new sendAndWait() on ws-client for request-response pattern
  over WS (generic _reqId resolver).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/broker/src/index.ts

@@ -18,7 +18,7 @@ import { WebSocketServer, type WebSocket } from "ws";
 import { and, eq, inArray, isNull, lt, sql } from "drizzle-orm";
 import { env } from "./env";
 import { db } from "./db";
-import { invite as inviteTable, mesh, meshMember, messageQueue, scheduledMessage as scheduledMessageTable, meshWebhook, peerState } from "@turbostarter/db/schema/mesh";
+import { invite as inviteTable, mesh, meshMember, messageQueue, presence, scheduledMessage as scheduledMessageTable, meshWebhook, peerState } from "@turbostarter/db/schema/mesh";
 import { user } from "@turbostarter/db/schema/auth";
 import { handleCliSync, type CliSyncRequest } from "./cli-sync";
 import { generateId } from "@turbostarter/shared/utils";
@@ -3898,6 +3898,154 @@ function handleConnection(ws: WebSocket): void {
           break;
         }
 
+        // --- Kick / Ban / Unban ---
+
+        case "kick": {
+          const km = msg as { type: "kick"; target?: string; stale?: number; all?: boolean; _reqId?: string };
+          // Authz: only owner or admin can kick.
+          const [kickMesh] = await db.select({ ownerUserId: mesh.ownerUserId }).from(mesh).where(eq(mesh.id, conn.meshId)).limit(1);
+          const [kickMember] = await db.select({ role: meshMember.role, userId: meshMember.userId }).from(meshMember).where(eq(meshMember.id, conn.memberId)).limit(1);
+          if (!kickMesh || (kickMesh.ownerUserId !== kickMember?.userId && kickMember?.role !== "admin")) {
+            sendError(ws, "forbidden", "only owner or admin can kick", undefined, km._reqId);
+            break;
+          }
+
+          const kicked: string[] = [];
+          const now = Date.now();
+
+          if (km.all) {
+            // Kick everyone except caller
+            for (const [pid, peer] of connections) {
+              if (peer.meshId !== conn.meshId || pid === presenceId) continue;
+              try { peer.ws.close(1000, "kicked"); } catch {}
+              connections.delete(pid);
+              void disconnectPresence(pid);
+              kicked.push(peer.displayName || pid);
+            }
+          } else if (km.stale && typeof km.stale === "number") {
+            // Kick peers idle longer than stale ms
+            const cutoff = now - km.stale;
+            for (const [pid, peer] of connections) {
+              if (peer.meshId !== conn.meshId || pid === presenceId) continue;
+              // Check last_ping_at from DB for accurate staleness
+              const [pres] = await db.select({ lastPingAt: presence.lastPingAt }).from(presence).where(eq(presence.id, pid)).limit(1);
+              if (pres && pres.lastPingAt && pres.lastPingAt.getTime() < cutoff) {
+                try { peer.ws.close(1000, "kicked_stale"); } catch {}
+                connections.delete(pid);
+                void disconnectPresence(pid);
+                kicked.push(peer.displayName || pid);
+              }
+            }
+          } else if (km.target) {
+            // Kick specific peer by name or pubkey
+            for (const [pid, peer] of connections) {
+              if (peer.meshId !== conn.meshId) continue;
+              if (peer.displayName === km.target || peer.memberPubkey === km.target || peer.memberPubkey.startsWith(km.target)) {
+                try { peer.ws.close(1000, "kicked"); } catch {}
+                connections.delete(pid);
+                void disconnectPresence(pid);
+                kicked.push(peer.displayName || pid);
+              }
+            }
+          }
+
+          conn.ws.send(JSON.stringify({ type: "kick_ack", kicked, _reqId: km._reqId }));
+          log.info("ws kick", { presence_id: presenceId, kicked_count: kicked.length, target: km.target ?? km.stale ?? "all" });
+          break;
+        }
+
+        case "ban": {
+          const bm = msg as { type: "ban"; target: string; _reqId?: string };
+          if (!bm.target) { sendError(ws, "invalid", "target required", undefined, bm._reqId); break; }
+
+          // Authz: only owner or admin
+          const [banMesh] = await db.select({ ownerUserId: mesh.ownerUserId }).from(mesh).where(eq(mesh.id, conn.meshId)).limit(1);
+          const [banMember] = await db.select({ role: meshMember.role, userId: meshMember.userId }).from(meshMember).where(eq(meshMember.id, conn.memberId)).limit(1);
+          if (!banMesh || (banMesh.ownerUserId !== banMember?.userId && banMember?.role !== "admin")) {
+            sendError(ws, "forbidden", "only owner or admin can ban", undefined, bm._reqId);
+            break;
+          }
+
+          // Find member by name or pubkey
+          const [targetMember] = await db.select({ id: meshMember.id, displayName: meshMember.displayName, peerPubkey: meshMember.peerPubkey })
+            .from(meshMember)
+            .where(and(
+              eq(meshMember.meshId, conn.meshId),
+              isNull(meshMember.revokedAt),
+              sql`(${meshMember.displayName} = ${bm.target} OR ${meshMember.peerPubkey} = ${bm.target} OR LEFT(${meshMember.peerPubkey}, ${bm.target.length}) = ${bm.target})`,
+            ))
+            .limit(1);
+
+          if (!targetMember) { sendError(ws, "not_found", `peer "${bm.target}" not found`, undefined, bm._reqId); break; }
+          if (targetMember.id === conn.memberId) { sendError(ws, "invalid", "cannot ban yourself", undefined, bm._reqId); break; }
+
+          // Revoke member
+          await db.update(meshMember).set({ revokedAt: new Date() }).where(eq(meshMember.id, targetMember.id));
+
+          // Kick all their connections
+          for (const [pid, peer] of connections) {
+            if (peer.meshId === conn.meshId && peer.memberPubkey === targetMember.peerPubkey) {
+              try { peer.ws.close(1000, "banned"); } catch {}
+              connections.delete(pid);
+              void disconnectPresence(pid);
+            }
+          }
+
+          void audit(conn.meshId, "member_banned", conn.memberId, conn.displayName, { target: targetMember.displayName, targetPubkey: targetMember.peerPubkey });
+          conn.ws.send(JSON.stringify({ type: "ban_ack", banned: targetMember.displayName, _reqId: bm._reqId }));
+          log.info("ws ban", { presence_id: presenceId, banned: targetMember.displayName, banned_member_id: targetMember.id });
+          break;
+        }
+
+        case "unban": {
+          const ubm = msg as { type: "unban"; target: string; _reqId?: string };
+          if (!ubm.target) { sendError(ws, "invalid", "target required", undefined, ubm._reqId); break; }
+
+          // Authz
+          const [unbanMesh] = await db.select({ ownerUserId: mesh.ownerUserId }).from(mesh).where(eq(mesh.id, conn.meshId)).limit(1);
+          const [unbanMember] = await db.select({ role: meshMember.role, userId: meshMember.userId }).from(meshMember).where(eq(meshMember.id, conn.memberId)).limit(1);
+          if (!unbanMesh || (unbanMesh.ownerUserId !== unbanMember?.userId && unbanMember?.role !== "admin")) {
+            sendError(ws, "forbidden", "only owner or admin can unban", undefined, ubm._reqId);
+            break;
+          }
+
+          // Find revoked member
+          const [revokedMember] = await db.select({ id: meshMember.id, displayName: meshMember.displayName })
+            .from(meshMember)
+            .where(and(
+              eq(meshMember.meshId, conn.meshId),
+              sql`${meshMember.revokedAt} IS NOT NULL`,
+              sql`(${meshMember.displayName} = ${ubm.target} OR ${meshMember.peerPubkey} = ${ubm.target})`,
+            ))
+            .limit(1);
+
+          if (!revokedMember) { sendError(ws, "not_found", `no banned peer "${ubm.target}"`, undefined, ubm._reqId); break; }
+
+          await db.update(meshMember).set({ revokedAt: null }).where(eq(meshMember.id, revokedMember.id));
+          void audit(conn.meshId, "member_unbanned", conn.memberId, conn.displayName, { target: revokedMember.displayName });
+          conn.ws.send(JSON.stringify({ type: "unban_ack", unbanned: revokedMember.displayName, _reqId: ubm._reqId }));
+          log.info("ws unban", { presence_id: presenceId, unbanned: revokedMember.displayName });
+          break;
+        }
+
+        case "list_bans": {
+          const lbm = msg as { type: "list_bans"; _reqId?: string };
+          const banned = await db.select({
+            name: meshMember.displayName,
+            pubkey: meshMember.peerPubkey,
+            revokedAt: meshMember.revokedAt,
+          }).from(meshMember).where(and(
+            eq(meshMember.meshId, conn.meshId),
+            sql`${meshMember.revokedAt} IS NOT NULL`,
+          ));
+          conn.ws.send(JSON.stringify({
+            type: "list_bans_result",
+            bans: banned.map((b) => ({ name: b.name, pubkey: b.pubkey, revokedAt: b.revokedAt?.toISOString() })),
+            _reqId: lbm._reqId,
+          }));
+          break;
+        }
+
         // --- Webhook CRUD ---
         case "create_webhook": {
           const cw = msg as Extract<WSClientMessage, { type: "create_webhook" }>;