feat(web): NetX workbench, UME-only UI, i18n, and header status

- Replace sidebar app with workbench home and module tabs (openOrFocusModule)

- Remove legacy pages; add module registry, shared tab channel, WEB.md

- Add zh/en i18n, global ToastProvider, restore oclaw bridge pill in header

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/components/WorkbenchCardIcon.tsx

@@ -0,0 +1,15 @@
+import type { ModuleIconTone } from "../config/modules";
+
+type Props = {
+  tone: ModuleIconTone;
+};
+
+export function WorkbenchCardIcon({ tone }: Props) {
+  return (
+    <span className={`wb-card__icon wb-card__icon--${tone}`} aria-hidden>
+      <svg viewBox="0 0 24 24" width="22" height="22" fill="currentColor">
+        <path d="M12 2a2 2 0 0 1 2 2v1.07A7.002 7.002 0 0 1 19.93 11H21a2 2 0 0 1 0 4h-1.07A7.002 7.002 0 0 1 13 20.93V22a2 2 0 0 1-4 0v-1.07A7.002 7.002 0 0 1 4.07 15H3a2 2 0 0 1 0-4h1.07A7.002 7.002 0 0 1 11 5.07V4a2 2 0 0 1 2-2zm0 6a4 4 0 1 0 0 8 4 4 0 0 0 0-8z" />
+      </svg>
+    </span>
+  );
+}