feat(web): W3-1 shared console routes, nav, api/sse/query-keys and shared components

- routes.ts registers all workspaces under /console (+ detail routes, engine, audit, login)
- api.ts: cookie session first (credentials include, CSRF header), Bearer only with stored key, 401 -> /login
- sse.ts: shared EventSource with ?after=seq catch-up, backoff reconnect, per-type subscribe
- shared components: data-table, filter-bar, detail-sheet, timeline, json-view, confirm-dialog,
  form-field, kv-list, stat-tile, error/loading states; ui tabs and textarea

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/routes/not-found.tsx

@@ -9,7 +9,7 @@ export default function NotFound() {
         title="页面不存在"
         description="检查地址是否正确，或回到首页。"
         action={
-          <Link to="/" className={buttonVariants({ variant: "outline" })}>
+          <Link to="/console" className={buttonVariants({ variant: "outline" })}>
             回到首页
           </Link>
         }