fix(app,server): discover server-cached setup snapshots across sessions

807cce6a hides the "Show setup" action when there is no workspace setup
snapshot. That broke the case where setup genuinely ran on a different
WebSocket session than the one the browser reconnected with: the snapshot
was cached per-Session, so discovery returned null and the action stayed
hidden.

Share the setup snapshot cache at the websocket-server level and inject
it into every Session. On focus, the workspace screen now requests
fetchWorkspaceSetupStatus when it has no local snapshot; workspaces with
no setup history still return null, preserving 807cce6a's intent.

packages/server/src/server/session.ts

@@ -508,6 +508,7 @@ export type SessionOptions = {
   providerSnapshotManager?: ProviderSnapshotManager;
   scriptRouteStore?: ScriptRouteStore;
   scriptRuntimeStore?: WorkspaceScriptRuntimeStore;
+  workspaceSetupSnapshots?: Map<string, WorkspaceSetupSnapshot>;
   onBranchChanged?: (
     workspaceId: string,
     oldBranch: string | null,
@@ -726,7 +727,7 @@ export class Session {
   );
   private readonly checkoutDiffSubscriptions = new Map<string, () => void>();
   private readonly workspaceGitWatchTargets = new Map<string, WorkspaceGitWatchTarget>();
-  private readonly workspaceSetupSnapshots = new Map<string, WorkspaceSetupSnapshot>();
+  private readonly workspaceSetupSnapshots: Map<string, WorkspaceSetupSnapshot>;
   private readonly workspaceGitFetchSubscriptions = new Map<string, () => void>();
   private readonly workspaceGitSubscriptions = new Map<string, () => void>();
   private readonly registerVoiceSpeakHandler?: (
@@ -775,6 +776,7 @@ export class Session {
       providerSnapshotManager,
       scriptRouteStore,
       scriptRuntimeStore,
+      workspaceSetupSnapshots,
       onBranchChanged,
       getDaemonTcpPort,
       getDaemonTcpHost,
@@ -816,6 +818,7 @@ export class Session {
     this.providerSnapshotManager = providerSnapshotManager ?? null;
     this.scriptRouteStore = scriptRouteStore ?? null;
     this.scriptRuntimeStore = scriptRuntimeStore ?? null;
+    this.workspaceSetupSnapshots = workspaceSetupSnapshots ?? new Map();
     this.onBranchChanged = onBranchChanged;
     this.getDaemonTcpPort = getDaemonTcpPort ?? null;
     this.getDaemonTcpHost = getDaemonTcpHost ?? null;

packages/server/src/server/websocket-server.ts

@@ -16,6 +16,7 @@ import type { DaemonConfigStore, MutableDaemonConfig } from "./daemon-config-sto
 import {
   type ServerInfoStatusPayload,
   type SessionOutboundMessage,
+  type WorkspaceSetupSnapshot,
   type WSHelloMessage,
   WSInboundMessageSchema,
   type ServerCapabilityState,
@@ -317,6 +318,7 @@ export class VoiceAssistantWebSocketServer {
   } | null;
   private readonly voiceSpeakHandlers = new Map<string, VoiceSpeakHandler>();
   private readonly voiceCallerContexts = new Map<string, VoiceCallerContext>();
+  private readonly workspaceSetupSnapshots = new Map<string, WorkspaceSetupSnapshot>();
   private readonly agentProviderRuntimeSettings: AgentProviderRuntimeSettingsMap | undefined;
   private readonly providerOverrides: Record<string, ProviderOverride> | undefined;
   private readonly isDev: boolean;
@@ -766,6 +768,7 @@ export class VoiceAssistantWebSocketServer {
       providerSnapshotManager: this.providerSnapshotManager,
       scriptRouteStore: this.scriptRouteStore ?? undefined,
       scriptRuntimeStore: this.scriptRuntimeStore ?? undefined,
+      workspaceSetupSnapshots: this.workspaceSetupSnapshots,
       onBranchChanged: this.onBranchChanged ?? undefined,
       getDaemonTcpPort: this.getDaemonTcpPort ?? undefined,
       getDaemonTcpHost: this.getDaemonTcpHost ?? undefined,