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/index.html

@@ -1,10 +1,10 @@
 <!doctype html>
-<html lang="en">
+<html lang="zh-CN">
   <head>
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>web</title>
+    <title>NetX · UME</title>
   </head>
   <body>
     <div id="root"></div>