feat(settings): admin switch to allow or block members' test runs

Settings → AI tools → Tests on this server (admin, S3 only). Stored in
/opt/agenthub/app/member-policy.json, which member-guard.js reads as the
member at each Bash call — no restart; no file = blocked. GET/PUT
/api/ai-tools/member-policy, audited, 409 ENOS3 outside S3.

client/src/lib/api.ts

@@ -3782,6 +3782,14 @@ export const api = {
         method: "PUT",
         body: JSON.stringify({ enabled }),
       }),
+    /** GET /api/ai-tools/member-policy - what members' Claude may run (server mode, S3). */
+    memberPolicy: () => request<MemberPolicyState>("/ai-tools/member-policy"),
+    /** PUT /api/ai-tools/member-policy - an admin's switch. */
+    setMemberPolicy: (allowTests: boolean) =>
+      request<MemberPolicyState>("/ai-tools/member-policy", {
+        method: "PUT",
+        body: JSON.stringify({ allowTests }),
+      }),
     /** POST /api/ai-tools/refresh - re-read the login shell's PATH and re-detect. */
     refresh: () => request<AiToolsView>("/ai-tools/refresh", { method: "POST" }),
     /** PUT /api/ai-tools/:id - enable/disable a tool, make it the default, or set its default model ("" clears). */
@@ -5274,6 +5282,13 @@ export interface ArtifactCandidate {
 }
 
 /** `GET /api/ai-tools/omp-sharing` — never a token. */
+export interface MemberPolicyState {
+  /** Server mode with per-user Linux accounts (S3): the only place it applies. */
+  available: boolean;
+  /** May members' Claude run test runners and container commands? Off by default. */
+  allowTests: boolean;
+}
+
 export interface OmpSharingState {
   /** Server mode with per-user Linux accounts (S3): the only place it applies. */
   available: boolean;