[codex] increase login lock threshold (#984)

* increase login ip lock threshold

* show login lock recovery commands

tests/server/login-limiter.test.ts

@@ -0,0 +1,66 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+async function loadLimiter() {
+  vi.resetModules()
+  vi.doMock('fs/promises', () => ({
+    readFile: vi.fn().mockRejectedValue(new Error('ENOENT')),
+    writeFile: vi.fn(),
+    mkdir: vi.fn(),
+  }))
+  vi.doMock('fs', () => ({ writeFileSync: vi.fn() }))
+  vi.doMock('../../packages/server/src/config', () => ({
+    config: { appHome: '/tmp/hermes-web-ui-test' },
+  }))
+  return import('../../packages/server/src/services/login-limiter')
+}
+
+describe('login limiter', () => {
+  beforeEach(() => {
+    vi.useFakeTimers()
+    vi.setSystemTime(new Date('2026-05-24T00:00:00Z'))
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+    vi.doUnmock('fs/promises')
+    vi.doUnmock('fs')
+    vi.doUnmock('../../packages/server/src/config')
+    vi.resetModules()
+  })
+
+  it('locks password login on the tenth failed attempt from the same IP', async () => {
+    const limiter = await loadLimiter()
+    const ip = '192.0.2.10'
+
+    for (let i = 0; i < 9; i++) {
+      expect(limiter.checkPassword(ip)).toEqual({ allowed: true })
+      limiter.recordPasswordFailure(ip)
+    }
+
+    expect(limiter.checkPassword(ip)).toEqual({ allowed: true })
+    limiter.recordPasswordFailure(ip)
+
+    expect(limiter.checkPassword(ip)).toEqual({ allowed: false, status: 429 })
+    expect(limiter.getLockedIps()).toEqual([
+      expect.objectContaining({ ip, type: 'password', failures: 10 }),
+    ])
+  })
+
+  it('locks token auth on the tenth failed attempt from the same IP', async () => {
+    const limiter = await loadLimiter()
+    const ip = '192.0.2.20'
+
+    for (let i = 0; i < 9; i++) {
+      expect(limiter.checkToken(ip)).toEqual({ allowed: true })
+      limiter.recordTokenFailure(ip)
+    }
+
+    expect(limiter.checkToken(ip)).toEqual({ allowed: true })
+    limiter.recordTokenFailure(ip)
+
+    expect(limiter.checkToken(ip)).toEqual({ allowed: false, status: 429 })
+    expect(limiter.getLockedIps()).toEqual([
+      expect.objectContaining({ ip, type: 'token', failures: 10 }),
+    ])
+  })
+})