fix(topbar): drop demo.flow-master.ai from live tag; show 'live · EA2'

Oracle round-9 third blocker: App.tsx topbar tag rendered
liveMeta.fetchedFrom?.replace('https://', '') which surfaced
'demo.flow-master.ai' in the topbar chip in live mode.

Replaced with the buyer-safe brand label 'live · EA2'. liveMeta
import removed (no other references). Wizard preview pane label
change and CSP recovery from prior commit stay.

src/App.tsx

@@ -19,7 +19,7 @@ import CommandBar from "./components/CommandBar";
 import Toaster from "./components/Toaster";
 import Console from "./components/Console";
 import { Cmd, Home, Layers, HistoryIcon, Pulse, Refresh, Branch, Cog, User, Sun, Moon, Bot } from "./components/icons";
-import { liveMeta } from "./data/scenarios";
+
 
 export default function App() {
   const scene = useApp((s) => s.scene);
@@ -171,7 +171,7 @@ export default function App() {
                 </span>
                 <span className="topbar-chip mono">{sc.version}</span>
                 {sc.live ? (
-                  <span className="tag tag-live">live · {liveMeta.fetchedFrom?.replace("https://", "")}</span>
+                  <span className="tag tag-live">live · EA2</span>
                 ) : (
                   <span className="tag tag-syn">blueprint</span>
                 )}