fix(oracle-r8): approvals read-only by default + buyer-safe llm hint

Two Oracle round-8 blockers:

1. Approvals action buttons stayed enabled even though the actual
   runtime engine submit path is known-500. The runtime-values GET
   probe proved EA2 reachability, not action-path readiness — Oracle
   rejected 'fail-once-then-disable' for a primary buyer CTA.

   Now: actionsEnabled starts FALSE. Approvals shows a 'Read-only
   view' note with an explicit 'Enable live actions' checkbox. Action
   buttons stay disabled until the operator opts in. If a click then
   500s, actionsEnabled flips back off and the toast says 'Live actions
   have been turned back off.' No first-click-into-error.

2. Agent OFF hint exposed raw env var names OPENAI_API_KEY /
   ANTHROPIC_API_KEY. Replaced with buyer-safe 'Natural language
   replies are not enabled in this environment.'

Also removed the runtimeHealth probe entirely (Oracle's nit: the
probe's semantics were misleading — it only proved reachability,
not action-path readiness).

src/scenes/Agent.tsx

@@ -81,7 +81,7 @@ export default function Agent() {
           <p className="agent-side-sub">Deterministic command router with EA2-backed text memory.</p>
           <div className="agent-llm-state">
             <span className={`agent-llm-pill agent-llm-${llmState}`}>LLM provider · {llmState === "ready" ? "ON" : llmState === "off" ? "OFF" : "…"}</span>
-            {llmState === "off" && <span className="agent-llm-hint">Set OPENAI_API_KEY or ANTHROPIC_API_KEY to enable natural language replies.</span>}
+            {llmState === "off" && <span className="agent-llm-hint">Natural language replies are not enabled in this environment.</span>}
           </div>
         </header>
         <div className="agent-tool-list">

src/scenes/Approvals.tsx

@@ -53,7 +53,7 @@ export default function Approvals() {
   const [busy, setBusy] = useState<string | null>(null);
 
   const tenantId = useApp((s) => s.tenantId);
-  const [runtimeHealth, setRuntimeHealth] = useState<"unknown" | "up" | "down">("unknown");
+  const [actionsEnabled, setActionsEnabled] = useState(false);
 
   const loadQueue = async () => {
     if (!tenantId) {
@@ -71,21 +71,6 @@ export default function Approvals() {
 
   useEffect(() => { void loadQueue(); }, [tenantId]);
 
-  useEffect(() => {
-    let cancelled = false;
-    fetch(`${api.config.baseUrl}/api/ea2/runtime-values`, {
-      method: "GET",
-      headers: { Authorization: `Bearer ${sessionStorage.getItem("fm.mc.token.v1")}` },
-    })
-      .then((r) => {
-        if (cancelled) return;
-        if (r.status === 422 || r.ok) setRuntimeHealth("up");
-        else setRuntimeHealth("down");
-      })
-      .catch(() => { if (!cancelled) setRuntimeHealth("down"); });
-    return () => { cancelled = true; };
-  }, []);
-
   useEffect(() => {
     if (!activeKey) return;
     let cancelled = false;
@@ -114,8 +99,8 @@ export default function Approvals() {
     } catch (err: any) {
       const msg = err.message || "";
       if (/runtime-values|action_execution_failed|500/i.test(msg)) {
-        setRuntimeHealth("down");
-        pushToast("err", "The runtime engine couldn't accept that decision. Action buttons are now disabled until it recovers.");
+        setActionsEnabled(false);
+        pushToast("err", "The runtime engine couldn't accept that decision. Live actions have been turned back off.");
       } else {
         pushToast("err", "Something went wrong handling that action. Try again in a moment.");
       }
@@ -198,21 +183,29 @@ export default function Approvals() {
                   </ul>
                 </div>
               )}
-              {runtimeHealth === "down" && (
-                <div className="approvals-runtime-note">
-                  Runtime engine is unreachable from this environment. Action buttons are disabled. Use this view to inspect cases; once the runtime comes back, actions will write to EA2.
-                </div>
-              )}
+              <div className="approvals-runtime-note">
+                {actionsEnabled
+                  ? "Live actions enabled. Clicking a button below writes the decision to EA2."
+                  : "Read-only view. Inspect cases here; enable live actions to submit decisions to EA2."}
+                <label className="approvals-actions-toggle">
+                  <input
+                    type="checkbox"
+                    checked={actionsEnabled}
+                    onChange={(e) => setActionsEnabled(e.target.checked)}
+                  />
+                  <span>Enable live actions</span>
+                </label>
+              </div>
               <div className="approvals-actions">
                 {(tx.available_actions || []).map((a: any) => {
-                  const disabled = !a.enabled || busy === a.id || runtimeHealth === "down";
+                  const disabled = !a.enabled || busy === a.id || !actionsEnabled;
                   return (
                     <button
                       key={a.id}
                       className={`btn ${a.kind === "approve" || a.kind === "submit" ? "btn-primary" : "btn-secondary"}`}
                       disabled={disabled}
                       onClick={() => handleAction(a.id)}
-                      title={runtimeHealth === "down" ? "Runtime engine offline" : a.display_label || a.id}
+                      title={actionsEnabled ? a.display_label || a.id : "Enable live actions to submit"}
                     >
                       <Pulse size={11} /> {busy === a.id ? "Sending…" : a.display_label || a.id}
                     </button>