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/pages/WorkbenchPage.tsx

@@ -0,0 +1,37 @@
+import { useI18n } from "../i18n";
+import { WorkbenchCardIcon } from "../components/WorkbenchCardIcon";
+import { modulesInSection, type WorkbenchSection } from "../config/modules";
+import { openOrFocusModule } from "../utils/moduleWindows";
+
+const SECTIONS: WorkbenchSection[] = ["monitoring"];
+
+export function WorkbenchPage() {
+  const { t } = useI18n();
+
+  return (
+    <div className="workbench">
+      {SECTIONS.map((section) => (
+        <section key={section} className="wb-section">
+          <h2 className="wb-section__title">{t(`workbench.${section}`)}</h2>
+          <div className="wb-grid">
+            {modulesInSection(section).map((mod) => (
+              <button
+                key={mod.moduleId}
+                type="button"
+                className="wb-card"
+                title={t("workbench.openModule")}
+                onClick={() => openOrFocusModule({ moduleId: mod.moduleId, path: mod.path })}
+              >
+                <WorkbenchCardIcon tone={mod.iconTone} />
+                <span className="wb-card__text">
+                  <span className="wb-card__label">{t(mod.labelKey)}</span>
+                  {mod.descKey ? <span className="wb-card__desc">{t(mod.descKey)}</span> : null}
+                </span>
+              </button>
+            ))}
+          </div>
+        </section>
+      ))}
+    </div>
+  );
+}