fix: canonicalize browser navigation after commit

apps/api/src/canary-gateway.test.ts

@@ -334,6 +334,31 @@ describe('same-origin canary gateway', () => {
     await reader?.cancel();
   });
 
+  it('flushes SSE response headers before the first upstream event', async () => {
+    const upstream = createServer((_request, response) => {
+      response.writeHead(200, {
+        'content-type': 'text/event-stream',
+        'cache-control': 'no-cache',
+      });
+      response.flushHeaders();
+    });
+    servers.push(upstream);
+    const gateway = await startGateway(await fixtureDist(), await listen(upstream));
+
+    const controller = new AbortController();
+    const timeout = setTimeout(() => controller.abort(), 500);
+    try {
+      const response = await fetch(`${gateway.origin}/api/v1/events`, {
+        signal: controller.signal,
+      });
+      expect(response.status).toBe(200);
+      expect(response.headers.get('content-type')).toBe('text/event-stream');
+      await response.body?.cancel();
+    } finally {
+      clearTimeout(timeout);
+    }
+  });
+
   it('has reversible, idempotent start/stop lifecycle', async () => {
     const gateway = createCanaryGateway({ distDir: await fixtureDist(), port: 0, upstreamPort: 1 });
     gateways.push(gateway);

apps/api/src/canary-gateway.ts

@@ -177,6 +177,7 @@ async function proxyRequest(
           upstreamResponse.statusMessage,
           withoutHopByHop(upstreamResponse.headers),
         );
+        response.flushHeaders();
         pipeline(upstreamResponse, response)
           .then(resolvePromise)
           .catch(() => {

apps/web/src/app-shell.integration.test.tsx

@@ -3,7 +3,7 @@ import { cleanup, fireEvent, render, screen, within } from '@testing-library/rea
 import userEvent from '@testing-library/user-event';
 import { afterEach, describe, expect, it, vi } from 'vitest';
 
-import { AppShell, type InstanceContext } from './app-shell.js';
+import { AppShell, resolveRoute, type InstanceContext } from './app-shell.js';
 import type { AuditDataSource } from './audit/audit-page.js';
 import type { AutomationDataSource as ScheduleDataSource } from './automation/automation-page.js';
 import type { EventStreamClient } from './events/event-stream-client.js';
@@ -203,7 +203,7 @@ describe('React AppShell and Fleet vertical slice', () => {
     expect(within(bravo).getByText('需要认证')).toBeTruthy();
   });
 
-  it('keeps every global workspace reachable and exposes settings subsections', async () => {
+  it('keeps every global workspace reachable and links settings directly to security', async () => {
     const jobsDataSource: JobsDataSource = { load: vi.fn().mockResolvedValue(emptyPage) };
     const scheduleDataSource: ScheduleDataSource = {
       listSchedules: vi.fn().mockResolvedValue([]),
@@ -234,7 +234,7 @@ describe('React AppShell and Fleet vertical slice', () => {
       '/automation',
     );
     expect(within(navigation).getByRole('link', { name: '设置' }).getAttribute('href')).toBe(
-      '/settings/instances',
+      '/settings/system',
     );
     expect(
       within(navigation).getByRole('link', { name: '自动化' }).getAttribute('aria-current'),
@@ -254,13 +254,31 @@ describe('React AppShell and Fleet vertical slice', () => {
     expect(await screen.findByText(/没有审计事件符合当前查询/i)).toBeTruthy();
 
     rerender(<AppShell pathname="/settings/system" eventStreamClient={quietEventStreamClient} />);
-    const settingsNavigation = screen.getByRole('navigation', { name: '设置导航' });
-    expect(within(settingsNavigation).getByRole('link', { name: '实例管理' })).toBeTruthy();
-    expect(
-      within(settingsNavigation)
-        .getByRole('link', { name: '系统与安全' })
-        .getAttribute('aria-current'),
-    ).toBe('page');
+    expect(screen.getByRole('heading', { name: '密码保护' })).toBeTruthy();
+    expect(screen.queryByRole('navigation', { name: '设置导航' })).toBeNull();
+  });
+
+  it('redirects legacy top-level instance settings without loading Fleet', () => {
+    expect(resolveRoute('/settings/instances')).toMatchObject({
+      kind: 'redirect',
+      to: '/settings/system',
+    });
+    expect(resolveRoute('/settings/instances/bravo')).toMatchObject({
+      kind: 'settings-instance-detail',
+      params: { instanceId: 'bravo' },
+    });
+
+    const load = vi.fn().mockResolvedValue(snapshot);
+    render(
+      <AppShell
+        pathname="/settings/instances"
+        fleetDataSource={source(load)}
+        eventStreamClient={quietEventStreamClient}
+      />,
+    );
+
+    expect(screen.getByRole('heading', { name: '密码保护' })).toBeTruthy();
+    expect(load).not.toHaveBeenCalled();
   });
 
   it('hides placeholder dev version badge in the top bar', () => {

apps/web/src/app-shell.tsx

@@ -40,7 +40,6 @@ import {
   type NotificationsDataSource,
 } from './instances/notifications-module.js';
 import { OtaModule, type OtaDataSource } from './instances/ota-module.js';
-import { InstanceSettingsPage } from './settings/instance-settings-page.js';
 import {
   InstanceDetail,
   INSTANCE_MODULE_LABELS,
@@ -69,7 +68,6 @@ export type RouteKind =
   | 'job-detail'
   | 'audit'
   | 'audit-detail'
-  | 'settings-instances'
   | 'settings-instance-detail'
   | 'settings-system'
   | 'not-found';
@@ -139,13 +137,14 @@ function decode(value: string): string {
 export function resolveRoute(input: string): ResolvedRoute {
   const pathname = normalize(input);
   if (pathname === '/') return { kind: 'redirect', pathname, to: '/fleet' };
+  if (pathname === '/settings/instances')
+    return { kind: 'redirect', pathname, to: '/settings/system' };
   const staticRoutes: Readonly<Record<string, RouteKind>> = {
     '/fleet': 'fleet',
     '/automation': 'automation',
     '/instances/new': 'instance-new',
     '/jobs': 'jobs',
     '/audit': 'audit',
-    '/settings/instances': 'settings-instances',
     '/settings/system': 'settings-system',
   };
   if (staticRoutes[pathname]) return { kind: staticRoutes[pathname], pathname };
@@ -270,14 +269,6 @@ function Page({
         }
       />
     );
-  if (route.kind === 'settings-instances')
-    return (
-      <InstanceSettingsPage
-        {...(fleetDataSource ? { dataSource: fleetDataSource } : {})}
-        {...(fleetData ? { initialData: fleetData } : {})}
-        refreshSignal={fleetRefreshSignal}
-      />
-    );
   if (route.kind === 'settings-system') return <ConsoleAuthSettings />;
   if (route.kind === 'not-found')
     return (
@@ -405,7 +396,6 @@ function Page({
     'job-detail': '任务详情',
     audit: '审计',
     'audit-detail': '审计事件',
-    'settings-instances': '实例设置',
     'settings-instance-detail': '实例设置',
     'settings-system': '系统设置',
   };
@@ -432,7 +422,7 @@ const GLOBAL_NAVIGATION: readonly {
 }[] = [
   { section: 'fleet', href: '/fleet', label: '节点', icon: 'grid' },
   { section: 'automation', href: '/automation', label: '自动化', icon: 'jobs' },
-  { section: 'settings', href: '/settings/instances', label: '设置', icon: 'settings' },
+  { section: 'settings', href: '/settings/system', label: '设置', icon: 'settings' },
 ];
 
 const STREAM_LABELS = {
@@ -693,22 +683,6 @@ export function AppShell({
       </header>
       <div className="app-layout app-layout-single">
         <main id="main-content" tabIndex={-1}>
-          {currentSection === 'settings' ? (
-            <nav className="settings-navigation" aria-label="设置导航">
-              <a
-                href="/settings/instances"
-                aria-current={route.kind === 'settings-system' ? undefined : 'page'}
-              >
-                实例管理
-              </a>
-              <a
-                href="/settings/system"
-                aria-current={route.kind === 'settings-system' ? 'page' : undefined}
-              >
-                系统与安全
-              </a>
-            </nav>
-          ) : null}
           {routeInstanceId && instanceLoading ? (
             <p role="status" aria-label="实例加载状态">
               正在加载实例…

apps/web/src/main.tsx

@@ -3,16 +3,29 @@ import { createRoot } from 'react-dom/client';
 import 'animal-island-ui/style';
 
 import { ConsoleAuthGate } from './auth/console-auth.js';
-import { AppShell } from './app-shell.js';
+import { AppShell, resolveRoute } from './app-shell.js';
+import { useBrowserPathname } from './navigation/use-browser-pathname.js';
 import './styles.css';
 
 const root = document.querySelector<HTMLElement>('#root');
 if (!root) throw new Error('Missing application root');
 
+function resolveBrowserPathname(pathname: string): string {
+  const route = resolveRoute(pathname);
+  return route.kind === 'redirect' ? (route.to ?? pathname) : pathname;
+}
+
+function BrowserApp() {
+  const pathname = useBrowserPathname(resolveBrowserPathname);
+  return (
+    <ConsoleAuthGate>
+      <AppShell pathname={pathname} />
+    </ConsoleAuthGate>
+  );
+}
+
 createRoot(root).render(
   <StrictMode>
-    <ConsoleAuthGate>
-      <AppShell pathname={window.location.pathname} />
-    </ConsoleAuthGate>
+    <BrowserApp />
   </StrictMode>,
 );

apps/web/src/navigation/use-browser-pathname.test.tsx

@@ -0,0 +1,134 @@
+// @vitest-environment jsdom
+import { cleanup, fireEvent, render, screen } from '@testing-library/react';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+import { useBrowserPathname } from './use-browser-pathname.js';
+
+function Harness({
+  link = <a href="/automation">Automation</a>,
+  onMainFocus,
+  resolvePathname,
+}: {
+  link?: React.ReactNode;
+  onMainFocus?: (pathname: string) => void;
+  resolvePathname?: (pathname: string) => string;
+}) {
+  const pathname = useBrowserPathname(resolvePathname);
+  return (
+    <>
+      {link}
+      <main id="main-content" tabIndex={-1} onFocus={() => onMainFocus?.(pathname)}>
+        {pathname}
+      </main>
+    </>
+  );
+}
+
+afterEach(() => {
+  cleanup();
+  window.history.replaceState(null, '', '/');
+  vi.restoreAllMocks();
+});
+
+describe('useBrowserPathname', () => {
+  it('pushes eligible same-origin links and updates pathname without reloading', () => {
+    window.history.replaceState(null, '', '/fleet');
+    const pushState = vi.spyOn(window.history, 'pushState');
+    const scrollTo = vi.spyOn(window, 'scrollTo').mockImplementation(() => undefined);
+    const focusedPathnames: string[] = [];
+    render(<Harness onMainFocus={(pathname) => focusedPathnames.push(pathname)} />);
+
+    const link = screen.getByRole('link', { name: 'Automation' });
+    const accepted = fireEvent.click(link);
+
+    expect(accepted).toBe(false);
+    expect(pushState).toHaveBeenCalledWith(null, '', '/automation');
+    expect(screen.getByRole('main').textContent).toBe('/automation');
+    expect(document.activeElement).toBe(screen.getByRole('main'));
+    expect(focusedPathnames).toEqual(['/automation']);
+    expect(scrollTo).toHaveBeenCalledWith({ top: 0, left: 0, behavior: 'auto' });
+  });
+
+  it('replaces a legacy pathname with its canonical destination', () => {
+    window.history.replaceState(null, '', '/settings/instances');
+    const replaceState = vi.spyOn(window.history, 'replaceState');
+
+    render(
+      <Harness
+        resolvePathname={(pathname) =>
+          pathname === '/settings/instances' ? '/settings/system' : pathname
+        }
+      />,
+    );
+
+    expect(replaceState).toHaveBeenCalledWith(null, '', '/settings/system');
+    expect(window.location.pathname).toBe('/settings/system');
+    expect(screen.getByRole('main').textContent).toBe('/settings/system');
+  });
+
+  it('makes an exact-current link a no-op without adding history', () => {
+    window.history.replaceState(null, '', '/fleet');
+    const pushState = vi.spyOn(window.history, 'pushState');
+    render(<Harness link={<a href="/fleet">Current</a>} />);
+
+    const accepted = fireEvent.click(screen.getByRole('link', { name: 'Current' }));
+
+    expect(accepted).toBe(false);
+    expect(pushState).not.toHaveBeenCalled();
+    expect(window.location.pathname).toBe('/fleet');
+  });
+
+  it('tracks browser history traversal and restores the page start', () => {
+    window.history.replaceState(null, '', '/automation');
+    const scrollTo = vi.spyOn(window, 'scrollTo').mockImplementation(() => undefined);
+    render(<Harness />);
+
+    window.history.replaceState(null, '', '/fleet');
+    fireEvent(window, new PopStateEvent('popstate'));
+
+    expect(screen.getByRole('main').textContent).toBe('/fleet');
+    expect(document.activeElement).toBe(screen.getByRole('main'));
+    expect(scrollTo).toHaveBeenCalledWith({ top: 0, left: 0, behavior: 'auto' });
+  });
+
+  it.each([
+    [
+      'target window',
+      <a href="/automation" target="_blank">
+        Excluded
+      </a>,
+      {},
+    ],
+    [
+      'download',
+      <a href="/automation" download>
+        Excluded
+      </a>,
+      {},
+    ],
+    ['external origin', <a href="https://example.com/automation">Excluded</a>, {}],
+    ['hash-only navigation', <a href="/fleet#cards">Excluded</a>, {}],
+    ['middle click', <a href="/automation">Excluded</a>, { button: 1 }],
+    ['meta click', <a href="/automation">Excluded</a>, { metaKey: true }],
+    ['control click', <a href="/automation">Excluded</a>, { ctrlKey: true }],
+    ['shift click', <a href="/automation">Excluded</a>, { shiftKey: true }],
+    ['alt click', <a href="/automation">Excluded</a>, { altKey: true }],
+  ])('leaves %s to the browser', (_label, link, eventInit) => {
+    window.history.replaceState(null, '', '/fleet');
+    const pushState = vi.spyOn(window.history, 'pushState');
+    render(<Harness link={link} />);
+
+    let hookPrevented = true;
+    const suppressBrowserNavigation = (event: MouseEvent) => {
+      hookPrevented = event.defaultPrevented;
+      event.preventDefault();
+    };
+    document.addEventListener('click', suppressBrowserNavigation, { once: true });
+    const event = new MouseEvent('click', { bubbles: true, cancelable: true, ...eventInit });
+    screen.getByRole('link', { name: 'Excluded' }).dispatchEvent(event);
+
+    expect(hookPrevented).toBe(false);
+    expect(pushState).not.toHaveBeenCalled();
+    expect(screen.getByRole('main').textContent).toBe('/fleet');
+  });
+});

apps/web/src/navigation/use-browser-pathname.ts

@@ -0,0 +1,86 @@
+import { useEffect, useLayoutEffect, useRef, useState } from 'react';
+
+export type PathnameResolver = (pathname: string) => string;
+
+const keepPathname: PathnameResolver = (pathname) => pathname;
+
+function currentRelativeLocation(): string {
+  return `${window.location.pathname}${window.location.search}${window.location.hash}`;
+}
+
+function resolvedLocation(location: string, resolvePathname: PathnameResolver): string {
+  const url = new URL(location, window.location.origin);
+  const pathname = resolvePathname(url.pathname);
+  return `${pathname}${url.search}${url.hash}`;
+}
+
+function restorePageStart(): void {
+  window.scrollTo({ top: 0, left: 0, behavior: 'auto' });
+  document.querySelector<HTMLElement>('#main-content')?.focus({ preventScroll: true });
+}
+
+function isModifiedClick(event: MouseEvent): boolean {
+  return event.metaKey || event.ctrlKey || event.shiftKey || event.altKey;
+}
+
+export function useBrowserPathname(resolvePathname: PathnameResolver = keepPathname): string {
+  const [location, setLocation] = useState(currentRelativeLocation);
+  const restoreAfterCommit = useRef(false);
+  const pathname = new URL(location, window.location.origin).pathname;
+
+  useLayoutEffect(() => {
+    const canonicalLocation = resolvedLocation(location, resolvePathname);
+    if (canonicalLocation !== location) {
+      window.history.replaceState(window.history.state, '', canonicalLocation);
+      setLocation(canonicalLocation);
+      return;
+    }
+    if (!restoreAfterCommit.current) return;
+    restoreAfterCommit.current = false;
+    restorePageStart();
+  }, [location, resolvePathname]);
+
+  useEffect(() => {
+    function handleClick(event: MouseEvent): void {
+      if (event.defaultPrevented || event.button !== 0 || isModifiedClick(event)) return;
+      if (!(event.target instanceof Element)) return;
+
+      const anchor = event.target.closest<HTMLAnchorElement>('a[href]');
+      if (!anchor || anchor.hasAttribute('download')) return;
+      if (anchor.target && anchor.target !== '_self') return;
+
+      const url = new URL(anchor.href, window.location.href);
+      if (url.origin !== window.location.origin) return;
+      const nextLocation = `${url.pathname}${url.search}${url.hash}`;
+      if (nextLocation === currentRelativeLocation()) {
+        event.preventDefault();
+        return;
+      }
+      if (
+        url.pathname === window.location.pathname &&
+        url.search === window.location.search &&
+        url.hash !== window.location.hash
+      )
+        return;
+
+      event.preventDefault();
+      window.history.pushState(null, '', nextLocation);
+      restoreAfterCommit.current = true;
+      setLocation(currentRelativeLocation());
+    }
+
+    function handlePopState(): void {
+      restoreAfterCommit.current = true;
+      setLocation(currentRelativeLocation());
+    }
+
+    document.addEventListener('click', handleClick);
+    window.addEventListener('popstate', handlePopState);
+    return () => {
+      document.removeEventListener('click', handleClick);
+      window.removeEventListener('popstate', handlePopState);
+    };
+  }, []);
+
+  return pathname;
+}

apps/web/src/styles.css

@@ -341,30 +341,6 @@ main {
   background: #fbfcfd;
   box-shadow: 0 5px 22px rgba(20, 35, 55, 0.055);
 }
-.settings-navigation {
-  display: flex;
-  gap: 0.3rem;
-  margin: -0.35rem 0 1rem;
-  padding-bottom: 0.75rem;
-  border-bottom: 1px solid var(--line);
-}
-.settings-navigation a {
-  min-height: 2.35rem;
-  display: inline-flex;
-  align-items: center;
-  padding: 0.4rem 0.75rem;
-  color: var(--muted);
-  border-radius: 7px;
-  text-decoration: none;
-  font-size: 0.82rem;
-  font-weight: 700;
-}
-.settings-navigation a:hover,
-.settings-navigation a[aria-current='page'] {
-  color: var(--primary);
-  background: var(--primary-soft);
-}
-
 /* Shared page headers */
 .fleet-heading,
 main > section > header,
@@ -2879,26 +2855,6 @@ main {
   box-shadow: none;
 }
 
-.settings-navigation {
-  width: fit-content;
-  gap: 0.35rem;
-  margin: 0 0 1.6rem;
-  padding: 0.35rem;
-  border: 2px solid #d8cdb7;
-  border-radius: 999px;
-  background: #fffdf5;
-}
-
-.settings-navigation a {
-  border-radius: 999px;
-}
-
-.settings-navigation a:hover,
-.settings-navigation a[aria-current='page'] {
-  color: #725d42;
-  background: #fff0ae;
-}
-
 .fleet-heading,
 main > section > header,
 .page-heading {

docs/superpowers/plans/2026-07-30-settings-navigation-stream-performance.md

@@ -0,0 +1,456 @@
+# Settings Navigation And Stream Performance Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Make top-level settings security-only, switch internal pages without document reloads, and let the browser observe an idle SSE connection immediately.
+
+**Architecture:** Keep the existing pathname-based `AppShell` and add one focused browser-navigation Hook that owns pathname state, eligible link interception, history traversal, focus, and scroll restoration. Keep the instance editor route intact while turning the legacy top-level instance-settings route into the existing redirect route shape. Preserve streaming proxy behavior and explicitly flush downstream headers as soon as upstream headers arrive.
+
+**Tech Stack:** React 19, TypeScript 5.9, Testing Library, Vitest/jsdom, Node HTTP, Chrome DevTools Protocol browser E2E
+
+## Global Constraints
+
+- Do not add a third-party router.
+- Top-level settings contains only password protection and HTTP/HTTPS security information.
+- `/settings/instances` resolves as a redirect to `/settings/system`.
+- `/settings/instances/:instanceId` remains available for instance editing from node details.
+- Eligible same-origin links use `history.pushState`; external, download, target, cross-origin, and modified-click links retain browser behavior.
+- Browser back and forward remain functional through `popstate`.
+- Page changes focus `#main-content` and scroll to the top.
+- `AppShell` remains mounted across top-navigation changes so the event subscription is not recreated.
+- SSE remains streaming and authenticated; do not replace it with polling or conceal genuine reconnect states.
+- Production code changes must follow an observed failing test.
+- Do not push the resulting commits unless the user explicitly requests it.
+
+---
+
+## File Structure
+
+- `apps/web/src/app-shell.tsx`: route ownership and the three-entry global navigation; no browser event ownership.
+- `apps/web/src/app-shell.integration.test.tsx`: route, navigation, security-only settings, and instance-editor regression coverage.
+- `apps/web/src/navigation/use-browser-pathname.ts`: browser pathname state and document-level navigation interception.
+- `apps/web/src/navigation/use-browser-pathname.test.tsx`: jsdom behavior contract for same-page navigation.
+- `apps/web/src/main.tsx`: thin browser root that supplies the Hook pathname to the persistent `AppShell`.
+- `apps/web/src/styles.css`: remove now-unused top-level settings sub-navigation styles.
+- `apps/api/src/canary-gateway.ts`: downstream proxy header forwarding.
+- `apps/api/src/canary-gateway.test.ts`: idle SSE header-flush regression.
+- `scripts/real-browser-e2e.mjs`: browser-level assertions for navigation persistence, request volume, focus, and live status.
+
+### Task 1: Security-Only Top-Level Settings Route
+
+**Files:**
+- Modify: `apps/web/src/app-shell.integration.test.tsx`
+- Modify: `apps/web/src/app-shell.tsx`
+- Modify: `apps/web/src/styles.css`
+
+**Interfaces:**
+- Consumes: existing `resolveRoute(input: string): ResolvedRoute` and `AppShellProps`.
+- Produces: `resolveRoute('/settings/instances')` with `{ kind: 'redirect', to: '/settings/system' }`; global settings link `href="/settings/system"`.
+
+- [ ] **Step 1: Write failing route and rendering tests**
+
+Add an explicit `resolveRoute` import and assertions to `app-shell.integration.test.tsx`:
+
+```tsx
+expect(resolveRoute('/settings/instances')).toMatchObject({
+  kind: 'redirect',
+  to: '/settings/system',
+});
+expect(resolveRoute('/settings/instances/bravo')).toMatchObject({
+  kind: 'settings-instance-detail',
+  params: { instanceId: 'bravo' },
+});
+```
+
+Update the global-workspace test so settings points directly to `/settings/system`, the system settings content renders, and there is no top-level settings sub-navigation:
+
+```tsx
+expect(within(navigation).getByRole('link', { name: '设置' })).toHaveAttribute(
+  'href',
+  '/settings/system',
+);
+rerender(<AppShell pathname="/settings/system" eventStreamClient={quietEventStreamClient} />);
+expect(screen.getByRole('heading', { name: '系统与安全' })).toBeTruthy();
+expect(screen.queryByRole('navigation', { name: '设置导航' })).toBeNull();
+```
+
+Render `/settings/instances` with a spying Fleet source and assert it renders security settings without loading Fleet:
+
+```tsx
+const load = vi.fn().mockResolvedValue(snapshot);
+render(
+  <AppShell
+    pathname="/settings/instances"
+    fleetDataSource={source(load)}
+    eventStreamClient={quietEventStreamClient}
+  />,
+);
+expect(screen.getByRole('heading', { name: '系统与安全' })).toBeTruthy();
+expect(load).not.toHaveBeenCalled();
+```
+
+- [ ] **Step 2: Run the focused test and verify failure**
+
+Run: `corepack pnpm exec vitest run apps/web/src/app-shell.integration.test.tsx`
+
+Expected: FAIL because settings still links to `/settings/instances`, renders the settings sub-navigation, and owns the Fleet-backed instance settings page.
+
+- [ ] **Step 3: Implement the minimal settings route change**
+
+In `resolveRoute`, remove `/settings/instances` from `staticRoutes` and return the redirect before dynamic instance-edit matching:
+
+```tsx
+if (pathname === '/settings/instances')
+  return { kind: 'redirect', pathname, to: '/settings/system' };
+```
+
+Change the global item and remove the obsolete page branch and import:
+
+```tsx
+{ section: 'settings', href: '/settings/system', label: '设置', icon: 'settings' }
+```
+
+Delete the conditional `<nav className="settings-navigation">` block. Remove both `.settings-navigation` rule groups from `styles.css`; they no longer have a consumer.
+
+- [ ] **Step 4: Run the focused test and verify success**
+
+Run: `corepack pnpm exec vitest run apps/web/src/app-shell.integration.test.tsx`
+
+Expected: PASS, including the preserved `/settings/instances/bravo` editor route.
+
+- [ ] **Step 5: Commit the settings slice**
+
+```powershell
+git add apps/web/src/app-shell.tsx apps/web/src/app-shell.integration.test.tsx apps/web/src/styles.css
+git commit -m "fix: simplify top-level settings"
+```
+
+### Task 2: Same-Page Browser Pathname Hook
+
+**Files:**
+- Create: `apps/web/src/navigation/use-browser-pathname.ts`
+- Create: `apps/web/src/navigation/use-browser-pathname.test.tsx`
+- Modify: `apps/web/src/main.tsx`
+
+**Interfaces:**
+- Consumes: browser `window.location`, `window.history`, `document` click events, and `popstate`.
+- Produces: `useBrowserPathname(): string`.
+
+- [ ] **Step 1: Write failing Hook tests**
+
+Create a jsdom test harness:
+
+```tsx
+// @vitest-environment jsdom
+import { cleanup, fireEvent, render, screen } from '@testing-library/react';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { useBrowserPathname } from './use-browser-pathname.js';
+
+function Harness() {
+  const pathname = useBrowserPathname();
+  return (
+    <>
+      <a href="/automation">Automation</a>
+      <main id="main-content" tabIndex={-1}>{pathname}</main>
+    </>
+  );
+}
+
+afterEach(() => {
+  cleanup();
+  window.history.replaceState(null, '', '/');
+  vi.restoreAllMocks();
+});
+```
+
+Cover these exact contracts:
+
+```tsx
+it('pushes eligible same-origin links and updates pathname without reloading', () => {
+  window.history.replaceState(null, '', '/fleet');
+  const pushState = vi.spyOn(window.history, 'pushState');
+  const scrollTo = vi.spyOn(window, 'scrollTo').mockImplementation(() => undefined);
+  render(<Harness />);
+  fireEvent.click(screen.getByRole('link', { name: 'Automation' }));
+  expect(pushState).toHaveBeenCalledWith(null, '', '/automation');
+  expect(screen.getByRole('main')).toHaveTextContent('/automation');
+  expect(screen.getByRole('main')).toHaveFocus();
+  expect(scrollTo).toHaveBeenCalledWith({ top: 0, left: 0, behavior: 'auto' });
+});
+```
+
+Add a `popstate` test that replaces history with `/fleet`, dispatches `new PopStateEvent('popstate')`, and expects the rendered pathname to update. Add parameterized anchor tests proving no interception for `target="_blank"`, `download`, an external origin, hash-only navigation, `button: 1`, and each of `metaKey`, `ctrlKey`, `shiftKey`, and `altKey`.
+
+- [ ] **Step 2: Run Hook tests and verify failure**
+
+Run: `corepack pnpm exec vitest run apps/web/src/navigation/use-browser-pathname.test.tsx`
+
+Expected: FAIL because `use-browser-pathname.ts` does not exist.
+
+- [ ] **Step 3: Implement the minimal Hook**
+
+Implement a React Hook with this public shape:
+
+```tsx
+export function useBrowserPathname(): string
+```
+
+The effect must register one document `click` listener and one window `popstate` listener, and clean up both. The click listener must locate `event.target.closest('a[href]')`, reject prevented/non-primary/modified clicks, reject `download` and non-`_self` targets, parse with `new URL(anchor.href, window.location.href)`, require the current origin, reject same-path hash-only changes, then call:
+
+```tsx
+event.preventDefault();
+window.history.pushState(null, '', `${url.pathname}${url.search}${url.hash}`);
+setPathname(window.location.pathname);
+window.scrollTo({ top: 0, left: 0, behavior: 'auto' });
+document.querySelector<HTMLElement>('#main-content')?.focus({ preventScroll: true });
+```
+
+The `popstate` listener updates state from `window.location.pathname`, scrolls, and focuses using the same local helper.
+
+- [ ] **Step 4: Run Hook tests and verify success**
+
+Run: `corepack pnpm exec vitest run apps/web/src/navigation/use-browser-pathname.test.tsx`
+
+Expected: PASS for interception, history traversal, exclusions, focus, and scroll.
+
+- [ ] **Step 5: Keep the AppShell mounted in `main.tsx`**
+
+Add a thin component and pass its reactive pathname to the existing shell:
+
+```tsx
+function BrowserApp() {
+  const pathname = useBrowserPathname();
+  return (
+    <ConsoleAuthGate>
+      <AppShell pathname={pathname} />
+    </ConsoleAuthGate>
+  );
+}
+
+createRoot(root).render(
+  <StrictMode>
+    <BrowserApp />
+  </StrictMode>,
+);
+```
+
+This changes only `AppShell` props during navigation; it does not recreate the root or shell component.
+
+- [ ] **Step 6: Run all Web unit tests**
+
+Run: `corepack pnpm --filter @multi-simadmin/web test`
+
+Expected: PASS.
+
+- [ ] **Step 7: Commit the navigation slice**
+
+```powershell
+git add apps/web/src/navigation/use-browser-pathname.ts apps/web/src/navigation/use-browser-pathname.test.tsx apps/web/src/main.tsx
+git commit -m "feat: navigate workspaces without page reloads"
+```
+
+### Task 3: Flush Idle SSE Headers Through The Canary Gateway
+
+**Files:**
+- Modify: `apps/api/src/canary-gateway.test.ts`
+- Modify: `apps/api/src/canary-gateway.ts`
+
+**Interfaces:**
+- Consumes: upstream Node `IncomingMessage` headers and downstream `ServerResponse`.
+- Produces: downstream response headers observable before the first upstream body byte.
+
+- [ ] **Step 1: Write the failing idle-stream regression test**
+
+Add a test whose upstream sends and flushes headers but deliberately sends no body:
+
+```tsx
+it('flushes SSE response headers before the first upstream event', async () => {
+  const upstream = createServer((_request, response) => {
+    response.writeHead(200, {
+      'content-type': 'text/event-stream',
+      'cache-control': 'no-cache',
+    });
+    response.flushHeaders();
+  });
+  servers.push(upstream);
+  const gateway = await startGateway(await fixtureDist(), await listen(upstream));
+
+  const controller = new AbortController();
+  const timeout = setTimeout(() => controller.abort(), 500);
+  try {
+    const response = await fetch(`${gateway.origin}/api/v1/events`, {
+      signal: controller.signal,
+    });
+    expect(response.status).toBe(200);
+    expect(response.headers.get('content-type')).toBe('text/event-stream');
+    await response.body?.cancel();
+  } finally {
+    clearTimeout(timeout);
+  }
+});
+```
+
+- [ ] **Step 2: Run the gateway test and verify failure**
+
+Run: `corepack pnpm exec vitest run apps/api/src/canary-gateway.test.ts -t "flushes SSE response headers"`
+
+Expected: FAIL by abort/timeout because the gateway has not committed downstream headers.
+
+- [ ] **Step 3: Flush downstream headers after forwarding upstream headers**
+
+Immediately after the existing `response.writeHead(...)` in `proxyRequest`, add:
+
+```tsx
+response.flushHeaders();
+```
+
+Keep the existing `pipeline(upstreamResponse, response)` unchanged.
+
+- [ ] **Step 4: Run gateway tests and verify success**
+
+Run: `corepack pnpm exec vitest run apps/api/src/canary-gateway.test.ts`
+
+Expected: PASS for both the idle-header and multi-chunk streaming cases.
+
+- [ ] **Step 5: Commit the gateway slice**
+
+```powershell
+git add apps/api/src/canary-gateway.ts apps/api/src/canary-gateway.test.ts
+git commit -m "fix: flush proxied event stream headers"
+```
+
+### Task 4: Real Browser Navigation And Connection Regression
+
+**Files:**
+- Modify: `scripts/real-browser-e2e.mjs`
+
+**Interfaces:**
+- Consumes: built Web assets, isolated fixture server or `E2E_ORIGIN`, Chrome DevTools Protocol.
+- Produces: end-to-end proof that navigation is reload-free, does not recreate SSE, does not load Fleet from settings, and reaches the connected status.
+
+- [ ] **Step 1: Add instrumentation and failing browser assertions**
+
+Change the fixture event endpoint to return an open SSE response:
+
+```js
+if (pathname === '/api/v1/events') {
+  response.writeHead(200, {
+    'content-type': 'text/event-stream',
+    'cache-control': 'no-cache',
+  });
+  response.flushHeaders();
+  return;
+}
+```
+
+Record request pathnames in the isolated server and install a page-lifetime marker before navigating:
+
+```js
+await evaluate(cdp, `window.__navigationLifetime = crypto.randomUUID()`);
+const lifetime = await evaluate(cdp, `window.__navigationLifetime`);
+```
+
+After keyboard navigation from Fleet to settings, assert:
+
+```js
+assert.equal(await evaluate(cdp, `window.__navigationLifetime`), lifetime);
+assert.equal(await evaluate(cdp, `location.pathname`), '/settings/system');
+assert.equal(
+  await evaluate(cdp, `document.activeElement?.id`),
+  'main-content',
+  'Settings navigation must focus the main content',
+);
+```
+
+Use the recorded request counts before and after navigation to assert that `/api/v1/events` remains at one request and that settings navigation adds no `/api/v1/instances` or `/resources` request. Wait until `.connection-status [data-state="open"]` exists before asserting.
+
+- [ ] **Step 2: Build and run browser E2E to expose remaining failures**
+
+Run: `corepack pnpm run test:e2e:browser`
+
+Expected before all preceding tasks are applied: FAIL on the old settings path, lifetime marker, event request count, or open connection status. Expected after Tasks 1-3: PASS.
+
+- [ ] **Step 3: Update existing E2E route expectations and diagnostics**
+
+Replace both settings navigation expectations from `/settings/instances` and heading `实例` to `/settings/system` and the system/security heading. Update the final PASS line to name same-page navigation and live SSE status. Keep the existing responsive Fleet and Automation assertions unchanged.
+
+- [ ] **Step 4: Re-run browser E2E**
+
+Run: `corepack pnpm run test:e2e:browser`
+
+Expected: PASS in Chrome/Edge with one event subscription, no document reload, no Fleet requests caused by settings, focused main content, and connected stream status.
+
+- [ ] **Step 5: Commit the browser regression**
+
+```powershell
+git add scripts/real-browser-e2e.mjs
+git commit -m "test: cover persistent browser navigation"
+```
+
+### Task 5: Full Verification And Local Runtime
+
+**Files:**
+- Verify only; modify a file only if a failing check demonstrates a defect in the scoped implementation.
+
+**Interfaces:**
+- Consumes: all prior task outputs.
+- Produces: a verified release candidate at `http://127.0.0.1:8789/`.
+
+- [ ] **Step 1: Run unit and integration tests**
+
+Run: `corepack pnpm test`
+
+Expected: PASS.
+
+- [ ] **Step 2: Run static checks**
+
+Run: `corepack pnpm typecheck`
+
+Expected: PASS.
+
+Run: `corepack pnpm lint`
+
+Expected: PASS.
+
+Run: `corepack pnpm format:check`
+
+Expected: PASS.
+
+- [ ] **Step 3: Run the production Web build and real browser suite**
+
+Run: `corepack pnpm --filter @multi-simadmin/web build`
+
+Expected: PASS and emit `apps/web/dist`.
+
+Run: `corepack pnpm run test:e2e:browser`
+
+Expected: PASS.
+
+- [ ] **Step 4: Restart the local production services using the repository's existing runtime commands**
+
+First inspect the current listeners and repository runtime documentation; stop only the exact API/gateway processes belonging to this workspace. Start the API on `127.0.0.1:8790` and the gateway on `127.0.0.1:8789` with the existing configured environment and hidden background windows.
+
+- [ ] **Step 5: Verify the live gateway**
+
+Run:
+
+```powershell
+curl.exe -fsS http://127.0.0.1:8789/readyz
+curl.exe -sS -N --max-time 2 -D - http://127.0.0.1:8789/api/v1/events
+```
+
+Expected: readiness succeeds; the event request prints `HTTP/1.1 200 OK` and `content-type: text/event-stream` before curl times out waiting for an event body.
+
+- [ ] **Step 6: Inspect final Git state**
+
+Run: `git status --short --branch`
+
+Expected: branch contains only the planned commits and is ahead of `origin/main`; do not push.
+
+---
+
+## Self-Review
+
+- Spec coverage: Tasks 1-5 cover security-only settings, legacy redirect semantics, retained instance editing, persistent same-page navigation, link exclusions, history traversal, focus/scroll behavior, idle SSE header delivery, genuine stream state, request-volume regression, and local `8789` verification.
+- Placeholder scan: no deferred implementation or unspecified error-handling steps remain.
+- Type consistency: `useBrowserPathname(): string`, existing `ResolvedRoute`, and existing `EventStreamClient` contracts are used consistently across tasks.

docs/superpowers/specs/2026-07-30-settings-navigation-stream-performance-design.md

@@ -0,0 +1,54 @@
+# 设置、导航与事件流性能修复设计
+
+日期：2026-07-30
+
+## 目标
+
+消除进入设置页和切换顶部菜单时的明显停顿，让实时连接状态及时进入已连接状态，并把顶层设置收敛为仅包含系统与安全配置。
+
+## 已确认根因
+
+- 顶部“设置”当前进入 `/settings/instances`。该页面先读取实例列表，再为每个实例请求资源数据，造成与安全设置无关的请求放大。
+- 顶部导航使用普通链接，`main.tsx` 只读取一次 `window.location.pathname`。每次菜单切换都会整页重载，重新初始化 React、数据源和事件流。
+- 控制平面已经刷新 SSE 上游响应头，但 Canary 网关代理写入下游响应头后没有立即刷新。没有事件正文时，浏览器的 `fetch` 一直不能进入 `open` 状态，因此右上角长期显示“正在连接”。
+
+## 路由与设置
+
+- 顶部“设置”链接直接指向 `/settings/system`。
+- 顶层设置页面只渲染密码保护与 HTTP/HTTPS 安全信息，不再显示设置子导航。
+- `/settings/instances` 作为旧地址重定向到 `/settings/system`，避免旧书签落入不存在页面。
+- `/settings/instances/:instanceId` 继续保留实例编辑器，只从节点详情的“编辑实例”入口访问。
+- 不删除实例编辑组件、实例创建流程或相关 API。
+
+## 同页导航
+
+- 新增一个小型浏览器路径 Hook，维护当前 `pathname`。
+- 拦截无修饰键、同源、当前窗口的站内链接：调用 `history.pushState` 并更新路径，不触发整页重载。
+- 外链、下载链接、`target` 链接、不同源链接和带修饰键点击继续使用浏览器默认行为。
+- 监听 `popstate`，保证浏览器前进和后退可用。
+- 页面切换后将主内容聚焦并恢复到页面顶部，保持键盘与阅读器导航可预期。
+- `AppShell` 在菜单切换期间保持挂载，因此默认数据源和事件流客户端不会重建。
+
+## 事件流
+
+- Canary 网关收到上游响应头后，在写入下游响应头时立即调用 `flushHeaders()`。
+- 继续以流方式转发正文，不缓存 SSE，不修改认证头、游标或重连策略。
+- 没有任何事件时，浏览器仍能立即收到 `200` 与 `text/event-stream`，右上角切换为“实时连接正常”。
+- 真正断线时仍显示“正在重新连接”，不通过隐藏状态标签掩盖故障。
+
+## 测试
+
+- 路由测试验证 `/settings/instances` 重定向到 `/settings/system`，实例编辑路由不变。
+- AppShell 测试验证顶栏设置链接指向安全设置，且设置子导航不再出现。
+- 浏览器路径 Hook 测试验证站内导航、前进后退和不应拦截的链接。
+- Canary 网关测试构造“只刷新响应头、不发送事件正文”的 SSE 上游，验证下游请求在正文到达前即可获得响应。
+- 集成或浏览器测试验证菜单切换不造成页面重载、事件订阅不重建，设置页不请求 Fleet 数据。
+- 最终在本地 `8789` 验证设置页响应、菜单切换和实时连接状态。
+
+## 非目标
+
+- 不引入第三方路由库。
+- 不删除实例编辑路由或实例创建功能。
+- 不改变事件内容、事件游标、重连退避或认证模型。
+- 不通过轮询替代 SSE。
+- 不重构节点、自动化或安全设置页面的视觉设计。

scripts/real-browser-e2e.mjs

@@ -19,6 +19,7 @@ const FORBIDDEN_PORT = 8788;
 const EXTERNAL_ORIGIN = parseExternalE2eOrigin(process.env.E2E_ORIGIN);
 const SCREENSHOT_DIR = process.env.E2E_SCREENSHOT_DIR?.trim();
 const FLEET_FIXTURE = process.env.E2E_FLEET_FIXTURE !== '0';
+const requestPathnames = [];
 
 const CHROME_CANDIDATES = [
   process.env.CHROME_BIN,
@@ -77,11 +78,20 @@ const FLEET_FIXTURE_ITEMS = [
 
 async function builtAssetHandler(request, response) {
   const pathname = new URL(request.url ?? '/', 'http://e2e.local').pathname;
-  if (pathname === '/favicon.ico' || pathname === '/api/v1/events') {
+  requestPathnames.push(pathname);
+  if (pathname === '/favicon.ico') {
     response.statusCode = 204;
     response.end();
     return;
   }
+  if (pathname === '/api/v1/events') {
+    response.writeHead(200, {
+      'content-type': 'text/event-stream',
+      'cache-control': 'no-cache',
+    });
+    response.flushHeaders();
+    return;
+  }
   let body;
   if (pathname === '/api/v1/auth/status')
     body = { configured: false, protectionEnabled: false, authenticated: false };
@@ -737,7 +747,7 @@ try {
       `${viewport.width}px phone and temperature geometry overlaps: ${JSON.stringify(layout)}`,
     );
     assert.equal(
-        layout.hardwareEntries.length === FLEET_FIXTURE_ITEMS.length * 2 &&
+      layout.hardwareEntries.length === FLEET_FIXTURE_ITEMS.length * 2 &&
         layout.hardwareEntries.every((entry) => entry.labelFits && entry.valueFits),
       true,
       `${viewport.width}px hardware facts overflow: ${JSON.stringify(layout.hardwareEntries)}`,
@@ -884,7 +894,51 @@ try {
   );
 
   await assertWidePageGutters(cdp, 'Nodes');
-  await keyboardNavigate(cdp, '设置', '/settings/instances', '实例');
+  await eventually(
+    cdp,
+    `document.querySelector('.connection-status [data-state="open"]') !== null`,
+    'Event stream did not reach the open state',
+  );
+  await evaluate(cdp, `window.__navigationLifetime = crypto.randomUUID()`);
+  const navigationLifetime = await evaluate(cdp, `window.__navigationLifetime`);
+  const requestCountsBeforeSettings = EXTERNAL_ORIGIN
+    ? undefined
+    : {
+        events: requestPathnames.filter((pathname) => pathname === '/api/v1/events').length,
+        fleet: requestPathnames.filter(
+          (pathname) =>
+            pathname === '/api/v1/instances' ||
+            /^\/api\/v1\/instances\/[^/]+\/resources$/u.test(pathname),
+        ).length,
+      };
+  await keyboardNavigate(cdp, '设置', '/settings/system', '密码保护');
+  assert.equal(
+    await evaluate(cdp, `window.__navigationLifetime`),
+    navigationLifetime,
+    'Settings navigation reloaded the document',
+  );
+  assert.equal(
+    await evaluate(cdp, `document.activeElement?.id`),
+    'main-content',
+    'Settings navigation must focus the main content',
+  );
+  if (requestCountsBeforeSettings) {
+    await delay(100);
+    assert.equal(
+      requestPathnames.filter((pathname) => pathname === '/api/v1/events').length,
+      requestCountsBeforeSettings.events,
+      'Settings navigation recreated the event subscription',
+    );
+    assert.equal(
+      requestPathnames.filter(
+        (pathname) =>
+          pathname === '/api/v1/instances' ||
+          /^\/api\/v1\/instances\/[^/]+\/resources$/u.test(pathname),
+      ).length,
+      requestCountsBeforeSettings.fleet,
+      'Settings navigation requested Fleet data',
+    );
+  }
   await assertWidePageGutters(cdp, 'Settings');
   await keyboardNavigate(cdp, '自动化', '/automation', '自动化');
   await assertWidePageGutters(cdp, 'Automation');
@@ -980,7 +1034,17 @@ try {
     `document.querySelector('[role="tab"][aria-selected="true"]')?.textContent.trim() === '操作审计'`,
     '/audit alias did not select operation audit',
   );
-  await keyboardNavigate(cdp, '设置', '/settings/instances', '实例');
+  await navigate(cdp, `${origin}/settings/instances`);
+  await eventually(
+    cdp,
+    `location.pathname === '/settings/system'`,
+    'Legacy settings route did not replace the browser pathname',
+  );
+  await eventually(
+    cdp,
+    `document.querySelector('h1')?.textContent.trim() === '密码保护'`,
+    'Legacy settings route did not render password protection',
+  );
 
   assert.deepEqual(failures, [], `Browser failures detected:\n${failures.join('\n')}`);
   console.log(`PASS real Chrome E2E (${chromeBinary})`);
@@ -990,7 +1054,7 @@ try {
       : `PASS isolated built-asset server on ${origin} (legacy port 8788 untouched)`,
   );
   console.log(
-    'PASS three-item navigation, Automation drawer and aliases, batch selection, and 390/768/1024/1440/1920 responsive layouts',
+    'PASS persistent navigation, live SSE status, Automation workflows, and 390/768/1024/1440/1920 responsive layouts',
   );
 } catch (error) {
   console.error(error instanceof Error ? error.stack : error);