diff --git a/bin/hermes-web-ui.mjs b/bin/hermes-web-ui.mjs
index 9c87e27..654b45f 100755
--- a/bin/hermes-web-ui.mjs
+++ b/bin/hermes-web-ui.mjs
@@ -3,8 +3,9 @@ import { spawn, execSync, execFileSync } from 'child_process'
 import { resolve, dirname, join, delimiter } from 'path'
 import { fileURLToPath } from 'url'
 import { readFileSync, writeFileSync, unlinkSync, mkdirSync, openSync, chmodSync, statSync, existsSync, realpathSync } from 'fs'
-import { randomBytes } from 'crypto'
+import { randomBytes, scryptSync } from 'crypto'
 import { homedir } from 'os'
+import { DatabaseSync } from 'node:sqlite'
 
 const __dirname = dirname(fileURLToPath(import.meta.url))
 const __filename = fileURLToPath(import.meta.url)
@@ -19,7 +20,11 @@ const PID_DIR = WEB_UI_HOME
 const PID_FILE = join(PID_DIR, 'server.pid')
 const LOG_FILE = join(PID_DIR, 'server.log')
 const TOKEN_FILE = join(PID_DIR, '.token')
+const LOGIN_LOCK_FILE = join(WEB_UI_HOME, '.login-lock.json')
+const WEB_UI_DB_FILE = join(WEB_UI_HOME, 'hermes-web-ui.db')
 const DEFAULT_PORT = 8648
+const DEFAULT_USERNAME = 'admin'
+const DEFAULT_PASSWORD = '123456'
 
 // ─── Auto-fix node-pty native module ──────────────────────────
 function ensureNativeModules() {
@@ -466,6 +471,86 @@ function showStatus() {
   }
 }
 
+function clearLoginLocks(options = {}) {
+  const { silent = false, checkRunning = true } = options
+  const serverRunning = checkRunning ? !!getPid() : false
+  let removed = false
+
+  try {
+    unlinkSync(LOGIN_LOCK_FILE)
+    removed = true
+    if (!silent) console.log(`  ✓ Removed login lock file: ${LOGIN_LOCK_FILE}`)
+  } catch (err) {
+    if (err?.code === 'ENOENT') {
+      if (!silent) console.log(`  ✓ No login lock file found: ${LOGIN_LOCK_FILE}`)
+    } else {
+      if (!silent) console.log(`  ✗ Failed to remove login lock file: ${err.message}`)
+      throw err
+    }
+  }
+
+  if (!silent && serverRunning) {
+    console.log('  ⚠ hermes-web-ui is running; restart it to clear in-memory login locks.')
+    console.log('    Run: hermes-web-ui restart')
+  }
+
+  return { path: LOGIN_LOCK_FILE, removed, serverRunning }
+}
+
+function hashPassword(password) {
+  const salt = randomBytes(16).toString('hex')
+  const hash = scryptSync(password, salt, 64).toString('hex')
+  return `scrypt:${salt}:${hash}`
+}
+
+function resetDefaultLogin(options = {}) {
+  const { silent = false } = options
+  mkdirSync(WEB_UI_HOME, { recursive: true })
+  const db = new DatabaseSync(WEB_UI_DB_FILE)
+  try {
+    db.exec(`
+      CREATE TABLE IF NOT EXISTS users (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        username TEXT NOT NULL UNIQUE,
+        password_hash TEXT NOT NULL,
+        role TEXT NOT NULL DEFAULT 'admin',
+        status TEXT NOT NULL DEFAULT 'active',
+        created_at INTEGER NOT NULL,
+        updated_at INTEGER NOT NULL,
+        last_login_at INTEGER
+      )
+    `)
+
+    const now = Date.now()
+    const passwordHash = hashPassword(DEFAULT_PASSWORD)
+    const existing = db.prepare('SELECT id FROM users WHERE username = ?').get(DEFAULT_USERNAME)
+    if (existing?.id) {
+      db.prepare(
+        `UPDATE users
+         SET password_hash = ?, role = 'super_admin', status = 'active', updated_at = ?
+         WHERE id = ?`
+      ).run(passwordHash, now, existing.id)
+      if (!silent) {
+        console.log(`  ✓ Reset default login: ${DEFAULT_USERNAME} / ${DEFAULT_PASSWORD}`)
+        console.log(`    Database: ${WEB_UI_DB_FILE}`)
+      }
+      return { path: WEB_UI_DB_FILE, username: DEFAULT_USERNAME, password: DEFAULT_PASSWORD, action: 'updated' }
+    }
+
+    db.prepare(
+      `INSERT INTO users (username, password_hash, role, status, created_at, updated_at)
+       VALUES (?, ?, 'super_admin', 'active', ?, ?)`
+    ).run(DEFAULT_USERNAME, passwordHash, now, now)
+    if (!silent) {
+      console.log(`  ✓ Created default login: ${DEFAULT_USERNAME} / ${DEFAULT_PASSWORD}`)
+      console.log(`    Database: ${WEB_UI_DB_FILE}`)
+    }
+    return { path: WEB_UI_DB_FILE, username: DEFAULT_USERNAME, password: DEFAULT_PASSWORD, action: 'created' }
+  } finally {
+    db.close()
+  }
+}
+
 function main() {
   const command = process.argv[2] || 'start'
 
@@ -485,6 +570,8 @@ Commands:
   stop               Stop the server
   restart [port]     Restart the server
   status             Show server status
+  clear-login-locks  Delete the login IP lock file
+  reset-default-login Create or reset the default login (${DEFAULT_USERNAME} / ${DEFAULT_PASSWORD})
   update             Update to latest version and restart
   upgrade            Alias for update
   version            Show version number
@@ -493,6 +580,7 @@ Options:
   -v, --version      Show version number
   -h, --help         Show this help message
   --port <port>      Specify port (used with start/restart)
+  --restart          Restart after clear-login-locks
 `)
     process.exit(0)
   }
@@ -511,6 +599,19 @@ Options:
     case 'status':
       showStatus()
       break
+    case 'clear-login-locks': {
+      const restartAfterClear = process.argv.includes('--restart')
+      const result = clearLoginLocks()
+      if (restartAfterClear && result.serverRunning) {
+        const port = getRunningPort() ?? getPort()
+        stopDaemon()
+        setTimeout(() => startDaemon(port), 500)
+      }
+      break
+    }
+    case 'reset-default-login':
+      resetDefaultLogin()
+      break
     case 'update':
     case 'upgrade':
       doUpdate()
@@ -599,7 +700,9 @@ if (process.argv[1] && realpathSync(resolve(process.argv[1])) === __filename) {
 }
 
 export {
+  clearLoginLocks,
   commandExists,
   getListeningPids,
   parseUnixNetstatListeningPids,
+  resetDefaultLogin,
 }
diff --git a/packages/client/src/App.vue b/packages/client/src/App.vue
index 7324e72..896a44a 100644
--- a/packages/client/src/App.vue
+++ b/packages/client/src/App.vue
@@ -10,6 +10,7 @@ import { useKeyboard } from '@/composables/useKeyboard'
 import { useAppStore } from '@/stores/hermes/app'
 import SessionSearchModal from '@/components/hermes/chat/SessionSearchModal.vue'
 import AuthEventListener from '@/components/auth/AuthEventListener.vue'
+import DefaultCredentialPrompt from '@/components/auth/DefaultCredentialPrompt.vue'
 
 const { isDark, isComic } = useTheme()
 const { t } = useI18n()
@@ -73,6 +74,7 @@ useKeyboard()
             </main>
           </div>
           <SessionSearchModal />
+          <DefaultCredentialPrompt />
         </NNotificationProvider>
       </NDialogProvider>
     </NMessageProvider>
diff --git a/packages/client/src/api/auth.ts b/packages/client/src/api/auth.ts
index 3bb457b..c2ebfd8 100644
--- a/packages/client/src/api/auth.ts
+++ b/packages/client/src/api/auth.ts
@@ -36,6 +36,7 @@ export interface CurrentUser {
   created_at: number
   updated_at: number
   last_login_at: number | null
+  requiresCredentialChange?: boolean
 }
 
 export async function fetchCurrentUser(): Promise<CurrentUser> {
diff --git a/packages/client/src/components/auth/DefaultCredentialPrompt.vue b/packages/client/src/components/auth/DefaultCredentialPrompt.vue
new file mode 100644
index 0000000..e85b0b4
--- /dev/null
+++ b/packages/client/src/components/auth/DefaultCredentialPrompt.vue
@@ -0,0 +1,88 @@
+<script setup lang="ts">
+import { ref, watch } from "vue";
+import { useRoute, useRouter } from "vue-router";
+import { useI18n } from "vue-i18n";
+import { NButton, NModal } from "naive-ui";
+import { fetchCurrentUser } from "@/api/auth";
+import { getApiKey } from "@/api/client";
+
+const { t } = useI18n();
+const route = useRoute();
+const router = useRouter();
+
+const show = ref(false);
+const loading = ref(false);
+const checkedToken = ref("");
+const promptedUserId = ref<number | null>(null);
+
+function dismissalKey(userId: number): string {
+  return `hermes_default_credentials_prompt_dismissed_${userId}`;
+}
+
+async function checkDefaultCredentials() {
+  if (route.name === "login") {
+    show.value = false;
+    return;
+  }
+
+  const token = getApiKey();
+  if (!token || token === checkedToken.value) return;
+  checkedToken.value = token;
+
+  loading.value = true;
+  try {
+    const user = await fetchCurrentUser();
+    promptedUserId.value = user.id;
+    const dismissed = sessionStorage.getItem(dismissalKey(user.id)) === "1";
+    show.value = !!user.requiresCredentialChange && !dismissed;
+  } catch {
+    show.value = false;
+  } finally {
+    loading.value = false;
+  }
+}
+
+function remindLater() {
+  if (promptedUserId.value != null) {
+    sessionStorage.setItem(dismissalKey(promptedUserId.value), "1");
+  }
+  show.value = false;
+}
+
+function goToAccountSettings() {
+  show.value = false;
+  router.push({ name: "hermes.settings", query: { tab: "account" } });
+}
+
+watch(() => route.fullPath, () => {
+  void checkDefaultCredentials();
+}, { immediate: true });
+</script>
+
+<template>
+  <NModal
+    v-model:show="show"
+    preset="dialog"
+    :title="t('login.defaultCredentialTitle')"
+    :mask-closable="false"
+  >
+    <p class="credential-warning-text">
+      {{ t("login.defaultCredentialMessage") }}
+    </p>
+    <template #action>
+      <NButton :disabled="loading" @click="remindLater">
+        {{ t("login.defaultCredentialLater") }}
+      </NButton>
+      <NButton type="primary" :loading="loading" @click="goToAccountSettings">
+        {{ t("login.defaultCredentialAction") }}
+      </NButton>
+    </template>
+  </NModal>
+</template>
+
+<style scoped lang="scss">
+.credential-warning-text {
+  margin: 0;
+  line-height: 1.6;
+}
+</style>
diff --git a/packages/client/src/i18n/locales/de.ts b/packages/client/src/i18n/locales/de.ts
index 1c0cb39..1b5f671 100644
--- a/packages/client/src/i18n/locales/de.ts
+++ b/packages/client/src/i18n/locales/de.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: 'Token',
     usernamePlaceholder: 'Benutzername',
     passwordPlaceholder: 'Passwort',
+    defaultCredentialsHint: 'Standard-Benutzername: admin. Standard-Passwort: 123456.',
     credentialsRequired: 'Bitte Benutzername und Passwort eingeben',
     invalidCredentials: 'Ungultiger Benutzername oder Passwort',
     tooManyAttempts: 'Zu viele fehlgeschlagene Versuche, bitte versuchen Sie es spater erneut',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: 'Passwort-Login ist fur Benutzerkonten erforderlich.',
     passwordLoginNotConfigured: 'Passwort-Login ist nicht konfiguriert',
     passwordLoginConfigured: 'Aktuelles Konto: {username}',
+    defaultCredentialTitle: 'Standardkonto und Passwort andern',
+    defaultCredentialMessage: 'Das aktuelle Konto verwendet noch den Standard-Benutzernamen oder das Standard-Passwort. Um unbefugten Zugriff zu vermeiden, andern Sie Benutzername und Passwort des aktuellen Kontos so bald wie moglich.',
+    defaultCredentialAction: 'Jetzt andern',
+    defaultCredentialLater: 'Spater erinnern',
   },
 
   users: {
diff --git a/packages/client/src/i18n/locales/en.ts b/packages/client/src/i18n/locales/en.ts
index d5b4608..4a86f04 100644
--- a/packages/client/src/i18n/locales/en.ts
+++ b/packages/client/src/i18n/locales/en.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: 'Token',
     usernamePlaceholder: 'Username',
     passwordPlaceholder: 'Password',
+    defaultCredentialsHint: 'Default username: admin. Default password: 123456.',
     credentialsRequired: 'Please enter username and password',
     invalidCredentials: 'Invalid username or password',
     tooManyAttempts: 'Too many failed attempts, please try again later',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: 'Password login is required for user accounts.',
     passwordLoginNotConfigured: 'Password login is not configured',
     passwordLoginConfigured: 'Current account: {username}',
+    defaultCredentialTitle: 'Change the default account credentials',
+    defaultCredentialMessage: 'This account is still using the default username or password. To prevent unauthorized access, update the username and password as soon as possible.',
+    defaultCredentialAction: 'Update now',
+    defaultCredentialLater: 'Remind me later',
   },
 
   users: {
diff --git a/packages/client/src/i18n/locales/es.ts b/packages/client/src/i18n/locales/es.ts
index ae2d327..dfcdc33 100644
--- a/packages/client/src/i18n/locales/es.ts
+++ b/packages/client/src/i18n/locales/es.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: 'Token',
     usernamePlaceholder: 'Nombre de usuario',
     passwordPlaceholder: 'Contrasena',
+    defaultCredentialsHint: 'Nombre de usuario predeterminado: admin. Contrasena predeterminada: 123456.',
     credentialsRequired: 'Por favor, introduzca nombre de usuario y contrasena',
     invalidCredentials: 'Nombre de usuario o contrasena incorrectos',
     tooManyAttempts: 'Demasiados intentos fallidos, por favor intente mas tarde',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: 'El login con contrasena es obligatorio para las cuentas de usuario.',
     passwordLoginNotConfigured: 'Login con contrasena no configurado',
     passwordLoginConfigured: 'Cuenta actual: {username}',
+    defaultCredentialTitle: 'Cambia la cuenta y contrasena predeterminadas',
+    defaultCredentialMessage: 'La cuenta actual aun usa el nombre de usuario o la contrasena predeterminados. Para evitar accesos no autorizados, cambia cuanto antes el nombre de usuario y la contrasena de la cuenta actual.',
+    defaultCredentialAction: 'Cambiar ahora',
+    defaultCredentialLater: 'Recordar mas tarde',
   },
 
   users: {
diff --git a/packages/client/src/i18n/locales/fr.ts b/packages/client/src/i18n/locales/fr.ts
index 5b9f946..4259e57 100644
--- a/packages/client/src/i18n/locales/fr.ts
+++ b/packages/client/src/i18n/locales/fr.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: 'Jeton',
     usernamePlaceholder: 'Nom d\'utilisateur',
     passwordPlaceholder: 'Mot de passe',
+    defaultCredentialsHint: 'Nom d utilisateur par defaut : admin. Mot de passe par defaut : 123456.',
     credentialsRequired: 'Veuillez entrer le nom d\'utilisateur et le mot de passe',
     invalidCredentials: 'Nom d\'utilisateur ou mot de passe incorrect',
     tooManyAttempts: 'Trop de tentatives echouees, veuillez reessayer plus tard',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: 'Le login par mot de passe est requis pour les comptes utilisateur.',
     passwordLoginNotConfigured: 'Login par mot de passe non configure',
     passwordLoginConfigured: 'Compte actuel : {username}',
+    defaultCredentialTitle: 'Modifiez le compte et le mot de passe par defaut',
+    defaultCredentialMessage: 'Le compte connecte utilise encore le nom d utilisateur ou le mot de passe par defaut. Pour eviter tout acces non autorise, modifiez rapidement le nom d utilisateur et le mot de passe du compte actuel.',
+    defaultCredentialAction: 'Modifier maintenant',
+    defaultCredentialLater: 'Me le rappeler plus tard',
   },
 
   users: {
diff --git a/packages/client/src/i18n/locales/ja.ts b/packages/client/src/i18n/locales/ja.ts
index 13d7d37..1007660 100644
--- a/packages/client/src/i18n/locales/ja.ts
+++ b/packages/client/src/i18n/locales/ja.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: 'トークン',
     usernamePlaceholder: 'ユーザー名',
     passwordPlaceholder: 'パスワード',
+    defaultCredentialsHint: '既定のユーザー名：admin、既定のパスワード：123456',
     credentialsRequired: 'ユーザー名とパスワードを入力してください',
     invalidCredentials: 'ユーザー名またはパスワードが正しくありません',
     tooManyAttempts: 'ログイン試行回数が多すぎます。しばらくしてからお試しください',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: 'ユーザーアカウントにはパスワードログインが必要です。',
     passwordLoginNotConfigured: 'パスワードログイン未設定',
     passwordLoginConfigured: '現在のアカウント：{username}',
+    defaultCredentialTitle: '既定のアカウント情報を変更してください',
+    defaultCredentialMessage: '現在のログインアカウントは、既定のユーザー名または既定のパスワードをまだ使用しています。不正アクセスを防ぐため、できるだけ早く現在のアカウントでユーザー名とパスワードを変更してください。',
+    defaultCredentialAction: '変更する',
+    defaultCredentialLater: '後で通知',
   },
 
   users: {
diff --git a/packages/client/src/i18n/locales/ko.ts b/packages/client/src/i18n/locales/ko.ts
index d6bdcc8..2475990 100644
--- a/packages/client/src/i18n/locales/ko.ts
+++ b/packages/client/src/i18n/locales/ko.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: '토큰',
     usernamePlaceholder: '사용자 이름',
     passwordPlaceholder: '비밀번호',
+    defaultCredentialsHint: '기본 로그인 이름: admin, 기본 비밀번호: 123456',
     credentialsRequired: '사용자 이름과 비밀번호를 입력해 주세요',
     invalidCredentials: '사용자 이름 또는 비밀번호가 올바르지 않습니다',
     tooManyAttempts: '로그인 시도 횟수가 너무 많습니다. 잠시 후 다시 시도해 주세요',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: '사용자 계정에는 비밀번호 로그인이 필요합니다.',
     passwordLoginNotConfigured: '비밀번호 로그인 미설정',
     passwordLoginConfigured: '현재 계정: {username}',
+    defaultCredentialTitle: '기본 계정과 비밀번호를 변경하세요',
+    defaultCredentialMessage: '현재 로그인 계정이 아직 기본 사용자 이름 또는 기본 비밀번호를 사용하고 있습니다. 무단 접근을 방지하려면 현재 계정에서 사용자 이름과 비밀번호를 가능한 한 빨리 변경하세요.',
+    defaultCredentialAction: '변경하기',
+    defaultCredentialLater: '나중에 알림',
   },
 
   users: {
diff --git a/packages/client/src/i18n/locales/pt.ts b/packages/client/src/i18n/locales/pt.ts
index 81ad7c5..742a331 100644
--- a/packages/client/src/i18n/locales/pt.ts
+++ b/packages/client/src/i18n/locales/pt.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: 'Token',
     usernamePlaceholder: 'Nome de usuario',
     passwordPlaceholder: 'Senha',
+    defaultCredentialsHint: 'Nome de usuario padrao: admin. Senha padrao: 123456.',
     credentialsRequired: 'Por favor, insira nome de usuario e senha',
     invalidCredentials: 'Nome de usuario ou senha incorretos',
     tooManyAttempts: 'Muitas tentativas falhadas, por favor tente novamente mais tarde',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: 'Login por senha e obrigatorio para contas de usuario.',
     passwordLoginNotConfigured: 'Login por senha nao configurado',
     passwordLoginConfigured: 'Conta atual: {username}',
+    defaultCredentialTitle: 'Altere a conta e senha padrao',
+    defaultCredentialMessage: 'A conta atual ainda usa o nome de usuario ou a senha padrao. Para evitar acesso nao autorizado, altere o nome de usuario e a senha da conta atual o quanto antes.',
+    defaultCredentialAction: 'Alterar agora',
+    defaultCredentialLater: 'Lembrar depois',
   },
 
   users: {
diff --git a/packages/client/src/i18n/locales/zh-TW.ts b/packages/client/src/i18n/locales/zh-TW.ts
index 731d7f9..20c6122 100644
--- a/packages/client/src/i18n/locales/zh-TW.ts
+++ b/packages/client/src/i18n/locales/zh-TW.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: '權杖登入',
     usernamePlaceholder: '使用者名稱',
     passwordPlaceholder: '密碼',
+    defaultCredentialsHint: '預設登入名：admin，預設密碼：123456',
     credentialsRequired: '請輸入使用者名稱和密碼',
     invalidCredentials: '使用者名稱或密碼錯誤',
     tooManyAttempts: '登入失敗次數過多，請稍後再試',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: '使用者帳號必須保留密碼登入。',
     passwordLoginNotConfigured: '密碼登入未設定',
     passwordLoginConfigured: '目前帳號：{username}',
+    defaultCredentialTitle: '請修改預設帳號和密碼',
+    defaultCredentialMessage: '目前登入帳號仍在使用預設使用者名稱或預設密碼。為避免未授權存取，請盡快進入目前帳號修改使用者名稱和密碼。',
+    defaultCredentialAction: '去修改',
+    defaultCredentialLater: '稍後提醒',
   },
 
   users: {
diff --git a/packages/client/src/i18n/locales/zh.ts b/packages/client/src/i18n/locales/zh.ts
index 339edbc..223d194 100644
--- a/packages/client/src/i18n/locales/zh.ts
+++ b/packages/client/src/i18n/locales/zh.ts
@@ -12,6 +12,7 @@ export default {
     tokenLogin: '令牌登录',
     usernamePlaceholder: '用户名',
     passwordPlaceholder: '密码',
+    defaultCredentialsHint: '默认登录名：admin，默认密码：123456',
     credentialsRequired: '请输入用户名和密码',
     invalidCredentials: '用户名或密码错误',
     tooManyAttempts: '登录失败次数过多，请稍后重试',
@@ -37,6 +38,10 @@ export default {
     removeConfirm: '用户账号必须保留密码登录。',
     passwordLoginNotConfigured: '密码登录未配置',
     passwordLoginConfigured: '当前账户：{username}',
+    defaultCredentialTitle: '请修改默认账户和密码',
+    defaultCredentialMessage: '当前登录账户仍在使用默认用户名或默认密码。为了避免未授权访问，请尽快进入当前账户修改用户名和密码。',
+    defaultCredentialAction: '去修改',
+    defaultCredentialLater: '稍后提醒',
   },
 
   users: {
diff --git a/packages/client/src/views/LoginView.vue b/packages/client/src/views/LoginView.vue
index df32381..47c2447 100644
--- a/packages/client/src/views/LoginView.vue
+++ b/packages/client/src/views/LoginView.vue
@@ -63,6 +63,7 @@ async function handlePasswordLogin() {
       </div>
       <h1 class="login-title">{{ t("login.title") }}</h1>
       <p class="login-desc">{{ t("login.description") }}</p>
+      <p class="login-default-hint">{{ t("login.defaultCredentialsHint") }}</p>
 
       <form class="login-form" @submit.prevent="handleLogin">
         <input
@@ -128,10 +129,17 @@ async function handlePasswordLogin() {
 .login-desc {
   font-size: 14px;
   color: $text-muted;
-  margin: 0 0 32px;
+  margin: 0 0 12px;
   line-height: 1.6;
 }
 
+.login-default-hint {
+  margin: 0 0 28px;
+  font-family: $font-code;
+  font-size: 13px;
+  color: $text-secondary;
+}
+
 .login-form {
   display: flex;
   flex-direction: column;
diff --git a/packages/client/src/views/hermes/SettingsView.vue b/packages/client/src/views/hermes/SettingsView.vue
index cd9c79a..dc3b4eb 100644
--- a/packages/client/src/views/hermes/SettingsView.vue
+++ b/packages/client/src/views/hermes/SettingsView.vue
@@ -1,5 +1,6 @@
 <script setup lang="ts">
-import { onMounted } from "vue";
+import { computed, onMounted, ref, watch } from "vue";
+import { useRoute, useRouter } from "vue-router";
 import {
   NTabs,
   NTabPane,
@@ -22,6 +23,41 @@ import { isStoredSuperAdmin } from "@/api/client";
 const settingsStore = useSettingsStore();
 const { t } = useI18n();
 const canManageUsers = isStoredSuperAdmin();
+const route = useRoute();
+const router = useRouter();
+const activeTab = ref("account");
+
+const validTabs = computed(() => new Set([
+  "account",
+  ...(canManageUsers ? ["users"] : []),
+  "display",
+  "agent",
+  "memory",
+  "compression",
+  "session",
+  "privacy",
+  "models",
+  "voice",
+]));
+
+function normalizeTab(value: unknown): string {
+  const tab = typeof value === "string" ? value : "";
+  return validTabs.value.has(tab) ? tab : "account";
+}
+
+function handleTabUpdate(tab: string) {
+  activeTab.value = normalizeTab(tab);
+  router.replace({
+    query: {
+      ...route.query,
+      tab: activeTab.value === "account" ? undefined : activeTab.value,
+    },
+  });
+}
+
+watch(() => route.query.tab, (tab) => {
+  activeTab.value = normalizeTab(tab);
+}, { immediate: true });
 
 onMounted(() => {
   settingsStore.fetchSettings();
@@ -40,7 +76,7 @@ onMounted(() => {
         size="large"
         :description="t('common.loading')"
       >
-        <NTabs type="line" animated>
+        <NTabs v-model:value="activeTab" type="line" animated @update:value="handleTabUpdate">
           <NTabPane name="account" :tab="t('settings.tabs.account')">
             <AccountSettings />
           </NTabPane>
diff --git a/packages/server/src/controllers/auth.ts b/packages/server/src/controllers/auth.ts
index 0b70d9c..8f7cfde 100644
--- a/packages/server/src/controllers/auth.ts
+++ b/packages/server/src/controllers/auth.ts
@@ -1,6 +1,7 @@
 import type { Context } from 'koa'
 import { checkPassword, recordPasswordFailure, recordPasswordSuccess, extractIp, getLockedIps, unlockIp, unlockAll } from '../services/login-limiter'
 import {
+  DEFAULT_PASSWORD,
   DEFAULT_USERNAME,
   bootstrapDefaultSuperAdmin,
   countActiveSuperAdmins,
@@ -55,6 +56,7 @@ export async function currentUser(ctx: Context) {
       created_at: user.created_at,
       updated_at: user.updated_at,
       last_login_at: user.last_login_at,
+      requiresCredentialChange: user.username === DEFAULT_USERNAME || verifyPassword(DEFAULT_PASSWORD, user.password_hash),
     },
   }
 }
diff --git a/packages/server/src/controllers/hermes/profiles.ts b/packages/server/src/controllers/hermes/profiles.ts
index 70009db..8ad2eeb 100644
--- a/packages/server/src/controllers/hermes/profiles.ts
+++ b/packages/server/src/controllers/hermes/profiles.ts
@@ -633,10 +633,10 @@ export async function switchProfile(ctx: any) {
     }
 
     try {
-      const result = await bridgeCleanupClient().destroyAll()
-      logger.info('[switchProfile] destroyed all bridge sessions for Hermes profile "%s" destroyed=%s', name, result.destroyed)
+      const result = await bridgeCleanupClient().destroyProfile(name)
+      logger.info('[switchProfile] destroyed bridge sessions for Hermes profile "%s" destroyed=%s', name, result.destroyed)
     } catch (err: any) {
-      logger.warn(err, '[switchProfile] failed to destroy bridge sessions')
+      logger.warn(err, '[switchProfile] failed to destroy bridge sessions for profile "%s"', name)
     }
 
     try {
diff --git a/tests/client/default-credential-prompt.test.ts b/tests/client/default-credential-prompt.test.ts
new file mode 100644
index 0000000..8108394
--- /dev/null
+++ b/tests/client/default-credential-prompt.test.ts
@@ -0,0 +1,96 @@
+// @vitest-environment jsdom
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { nextTick } from 'vue'
+import { flushPromises, mount } from '@vue/test-utils'
+
+const mockPush = vi.hoisted(() => vi.fn())
+const mockFetchCurrentUser = vi.hoisted(() => vi.fn())
+const mockGetApiKey = vi.hoisted(() => vi.fn())
+const routeState = vi.hoisted(() => ({ fullPath: '/hermes/chat', name: 'hermes.chat' as any }))
+
+vi.mock('vue-router', () => ({
+  useRoute: () => routeState,
+  useRouter: () => ({ push: mockPush }),
+}))
+
+vi.mock('vue-i18n', () => ({
+  useI18n: () => ({
+    t: (key: string) => key,
+  }),
+}))
+
+vi.mock('@/api/auth', () => ({
+  fetchCurrentUser: mockFetchCurrentUser,
+}))
+
+vi.mock('@/api/client', () => ({
+  getApiKey: mockGetApiKey,
+}))
+
+vi.mock('naive-ui', async () => {
+  const { defineComponent, h } = await import('vue')
+  return {
+    NModal: defineComponent({
+      props: { show: Boolean, title: String },
+      setup(props, { slots }) {
+        return () => props.show
+          ? h('div', { class: 'modal' }, [
+            h('h2', props.title),
+            slots.default?.(),
+            h('div', { class: 'modal-actions' }, slots.action?.()),
+          ])
+          : null
+      },
+    }),
+    NButton: defineComponent({
+      emits: ['click'],
+      setup(_props, { emit, slots }) {
+        return () => h('button', { onClick: () => emit('click') }, slots.default?.())
+      },
+    }),
+  }
+})
+
+import DefaultCredentialPrompt from '@/components/auth/DefaultCredentialPrompt.vue'
+
+describe('DefaultCredentialPrompt', () => {
+  beforeEach(() => {
+    sessionStorage.clear()
+    vi.clearAllMocks()
+    routeState.fullPath = '/hermes/chat'
+    routeState.name = 'hermes.chat'
+    mockGetApiKey.mockReturnValue('jwt-token')
+  })
+
+  it('prompts after login when the current user still has default credentials', async () => {
+    mockFetchCurrentUser.mockResolvedValue({
+      id: 1,
+      username: 'admin',
+      role: 'super_admin',
+      status: 'active',
+      created_at: 1,
+      updated_at: 1,
+      last_login_at: 1,
+      requiresCredentialChange: true,
+    })
+
+    const wrapper = mount(DefaultCredentialPrompt)
+    await flushPromises()
+    await nextTick()
+
+    expect(mockFetchCurrentUser).toHaveBeenCalledOnce()
+    expect(wrapper.text()).toContain('login.defaultCredentialMessage')
+    await wrapper.findAll('button')[1].trigger('click')
+    expect(mockPush).toHaveBeenCalledWith({ name: 'hermes.settings', query: { tab: 'account' } })
+  })
+
+  it('does not prompt on the login route', async () => {
+    routeState.fullPath = '/'
+    routeState.name = 'login'
+
+    mount(DefaultCredentialPrompt)
+    await Promise.resolve()
+
+    expect(mockFetchCurrentUser).not.toHaveBeenCalled()
+  })
+})
diff --git a/tests/client/login-view.test.ts b/tests/client/login-view.test.ts
index c2534c5..8bbf83a 100644
--- a/tests/client/login-view.test.ts
+++ b/tests/client/login-view.test.ts
@@ -54,6 +54,12 @@ describe('LoginView password login', () => {
     expect(mockReplace).toHaveBeenCalledWith('/hermes/chat')
   })
 
+  it('shows the default login hint', () => {
+    const wrapper = mount(LoginView)
+
+    expect(wrapper.text()).toContain('login.defaultCredentialsHint')
+  })
+
   it('shows an error when password login fails', async () => {
     mockLoginWithPassword.mockRejectedValue(new Error('Invalid username or password'))
     const wrapper = mount(LoginView)
diff --git a/tests/server/cli-port-detection.test.ts b/tests/server/cli-port-detection.test.ts
index 4d41548..2386ad8 100644
--- a/tests/server/cli-port-detection.test.ts
+++ b/tests/server/cli-port-detection.test.ts
@@ -1,4 +1,9 @@
 import { afterEach, describe, expect, it, vi } from 'vitest'
+import { existsSync, mkdtempSync, rmSync, writeFileSync } from 'fs'
+import { tmpdir } from 'os'
+import { join } from 'path'
+import { scryptSync, timingSafeEqual } from 'crypto'
+import { DatabaseSync } from 'node:sqlite'
 
 type ChildProcessMocks = {
   execFileSync: ReturnType<typeof vi.fn>
@@ -21,10 +26,20 @@ async function loadCli(overrides: Partial<ChildProcessMocks> = {}) {
   }
 }
 
+function verifyPassword(password: string, passwordHash: string): boolean {
+  const [scheme, salt, expectedHex] = passwordHash.split(':')
+  if (scheme !== 'scrypt' || !salt || !expectedHex) return false
+  const expected = Buffer.from(expectedHex, 'hex')
+  const actual = scryptSync(password, salt, expected.length)
+  return actual.length === expected.length && timingSafeEqual(actual, expected)
+}
+
 describe('CLI port detection', () => {
   const originalPlatform = Object.getOwnPropertyDescriptor(process, 'platform')
+  const originalEnv = { ...process.env }
 
   afterEach(() => {
+    process.env = { ...originalEnv }
     vi.doUnmock('child_process')
     if (originalPlatform) {
       Object.defineProperty(process, 'platform', originalPlatform)
@@ -89,4 +104,61 @@ describe('CLI port detection', () => {
       8648,
     )).toEqual([2468])
   })
+
+  it('clears the login lock file from the configured Web UI home', async () => {
+    const home = mkdtempSync(join(tmpdir(), 'hermes-web-ui-cli-locks-'))
+    process.env.HERMES_WEB_UI_HOME = home
+    const lockFile = join(home, '.login-lock.json')
+    writeFileSync(lockFile, '{"passwordIpMap":{}}\n')
+
+    try {
+      const { clearLoginLocks } = await loadCli()
+      const result = clearLoginLocks({ silent: true, checkRunning: false })
+
+      expect(result).toEqual({ path: lockFile, removed: true, serverRunning: false })
+      expect(existsSync(lockFile)).toBe(false)
+
+      const second = clearLoginLocks({ silent: true, checkRunning: false })
+      expect(second).toEqual({ path: lockFile, removed: false, serverRunning: false })
+    } finally {
+      rmSync(home, { recursive: true, force: true })
+    }
+  })
+
+  it('resets an existing admin user to the default password', async () => {
+    const home = mkdtempSync(join(tmpdir(), 'hermes-web-ui-cli-default-login-'))
+    process.env.HERMES_WEB_UI_HOME = home
+    const dbPath = join(home, 'hermes-web-ui.db')
+
+    try {
+      const { resetDefaultLogin } = await loadCli()
+      const created = resetDefaultLogin({ silent: true })
+      expect(created.action).toBe('created')
+
+      const db = new DatabaseSync(dbPath)
+      try {
+        const initial = db.prepare('SELECT id, username, password_hash FROM users WHERE username = ?').get('admin') as any
+        expect(verifyPassword('123456', initial.password_hash)).toBe(true)
+        db.prepare('UPDATE users SET password_hash = ? WHERE username = ?').run('scrypt:bad:bad', 'admin')
+      } finally {
+        db.close()
+      }
+
+      const updated = resetDefaultLogin({ silent: true })
+      expect(updated.action).toBe('updated')
+
+      const verifyDb = new DatabaseSync(dbPath)
+      try {
+        const rows = verifyDb.prepare('SELECT id, username, password_hash, role, status FROM users WHERE username = ?').all('admin') as any[]
+        expect(rows).toHaveLength(1)
+        expect(verifyPassword('123456', rows[0].password_hash)).toBe(true)
+        expect(rows[0].role).toBe('super_admin')
+        expect(rows[0].status).toBe('active')
+      } finally {
+        verifyDb.close()
+      }
+    } finally {
+      rmSync(home, { recursive: true, force: true })
+    }
+  })
 })
diff --git a/tests/server/profiles-routes.test.ts b/tests/server/profiles-routes.test.ts
index 7d2528d..a629af8 100644
--- a/tests/server/profiles-routes.test.ts
+++ b/tests/server/profiles-routes.test.ts
@@ -4,6 +4,20 @@ import { tmpdir } from 'os'
 import { join } from 'path'
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
 
+const agentBridgeMocks = vi.hoisted(() => ({
+  destroyAll: vi.fn(),
+  destroyProfile: vi.fn(),
+}))
+
+const skillInjectorMocks = vi.hoisted(() => ({
+  injectMissingSkills: vi.fn(),
+  resolveTargetDirForProfile: vi.fn(),
+}))
+
+const sessionDeleterMocks = vi.hoisted(() => ({
+  switchProfile: vi.fn(),
+}))
+
 // Mock hermes-cli
 vi.mock('../../packages/server/src/services/hermes/hermes-cli', () => ({
   listProfiles: vi.fn(),
@@ -20,6 +34,27 @@ vi.mock('../../packages/server/src/services/hermes/hermes-cli', () => ({
   importProfile: vi.fn(),
 }))
 
+vi.mock('../../packages/server/src/services/hermes/agent-bridge', () => ({
+  AgentBridgeClient: vi.fn(() => ({
+    destroyAll: agentBridgeMocks.destroyAll,
+    destroyProfile: agentBridgeMocks.destroyProfile,
+  })),
+}))
+
+vi.mock('../../packages/server/src/services/hermes/skill-injector', () => {
+  const HermesSkillInjector = vi.fn(() => ({
+    injectMissingSkills: skillInjectorMocks.injectMissingSkills,
+  })) as any
+  HermesSkillInjector.resolveTargetDirForProfile = skillInjectorMocks.resolveTargetDirForProfile
+  return { HermesSkillInjector }
+})
+
+vi.mock('../../packages/server/src/services/hermes/session-deleter', () => ({
+  SessionDeleter: {
+    getInstance: vi.fn(() => sessionDeleterMocks),
+  },
+}))
+
 import * as hermesCli from '../../packages/server/src/services/hermes/hermes-cli'
 
 describe('Profile Routes', () => {
@@ -29,6 +64,9 @@ describe('Profile Routes', () => {
 
   beforeEach(() => {
     vi.clearAllMocks()
+    agentBridgeMocks.destroyProfile.mockResolvedValue({ destroyed: 0 })
+    skillInjectorMocks.injectMissingSkills.mockResolvedValue({ targets: [] })
+    skillInjectorMocks.resolveTargetDirForProfile.mockImplementation((name: string) => join('/tmp/hermes-skills', name))
   })
 
   afterEach(async () => {
@@ -121,6 +159,43 @@ describe('Profile Routes', () => {
     })
   })
 
+  describe('Hermes CLI active profile switch', () => {
+    it('only destroys bridge sessions for the target profile', async () => {
+      const hermesHome = await mkdtemp(join(tmpdir(), 'hermes-profile-switch-'))
+      tempHomes.push(hermesHome)
+      process.env.HERMES_HOME = hermesHome
+      const profileDir = join(hermesHome, 'profiles', 'work')
+      await mkdir(profileDir, { recursive: true })
+      await writeFile(join(profileDir, 'config.yaml'), 'model:\n  default: gpt-test\n', 'utf-8')
+      await writeFile(join(hermesHome, 'active_profile'), 'work\n', 'utf-8')
+      vi.mocked(hermesCli.useProfile).mockResolvedValue('Switched to work')
+      vi.mocked(hermesCli.getProfile).mockResolvedValue({
+        name: 'work',
+        path: profileDir,
+        model: 'gpt-test',
+        provider: 'test',
+        skills: 0,
+        hasEnv: false,
+        hasSoulMd: false,
+      } as any)
+      agentBridgeMocks.destroyProfile.mockResolvedValue({ destroyed: 2 })
+      const { switchProfile } = await import('../../packages/server/src/controllers/hermes/profiles')
+      const ctx: any = {
+        request: { body: { name: 'work' } },
+        status: 200,
+        body: undefined,
+      }
+
+      await switchProfile(ctx)
+
+      expect(ctx.status).toBe(200)
+      expect(ctx.body).toMatchObject({ success: true, active: 'work' })
+      expect(agentBridgeMocks.destroyProfile).toHaveBeenCalledWith('work')
+      expect(agentBridgeMocks.destroyAll).not.toHaveBeenCalled()
+      expect(sessionDeleterMocks.switchProfile).toHaveBeenCalledWith('work')
+    })
+  })
+
   describe('profile avatars', () => {
     it('stores generated avatar metadata under the Web UI home', async () => {
       const webUiHome = await mkdtemp(join(tmpdir(), 'hermes-web-ui-avatar-'))
diff --git a/tests/server/user-auth.test.ts b/tests/server/user-auth.test.ts
index ab644ea..2e2a54f 100644
--- a/tests/server/user-auth.test.ts
+++ b/tests/server/user-auth.test.ts
@@ -200,6 +200,30 @@ describe('user auth tables and middleware', () => {
     expect(ctx.body.token).toMatch(/^[^.]+\.[^.]+\.[^.]+$/)
   })
 
+  it('marks the default account credentials as requiring a change', async () => {
+    const { users } = await initUsers()
+    const admin = users.bootstrapDefaultSuperAdmin('admin', '123456')!
+    const ctrl = await import('../../packages/server/src/controllers/auth')
+
+    const defaultCtx = {
+      state: { user: { id: admin.id, username: 'admin', role: 'super_admin' } },
+      status: 200,
+      body: null,
+    } as any
+    await ctrl.currentUser(defaultCtx)
+    expect(defaultCtx.body.user.requiresCredentialChange).toBe(true)
+
+    users.updateUsername(admin.id, 'owner')
+    users.updateUserPassword(admin.id, 'stronger-password')
+    const changedCtx = {
+      state: { user: { id: admin.id, username: 'owner', role: 'super_admin' } },
+      status: 200,
+      body: null,
+    } as any
+    await ctrl.currentUser(changedCtx)
+    expect(changedCtx.body.user.requiresCredentialChange).toBe(false)
+  })
+
   it('lets super admins create regular admins with profile bindings', async () => {
     const { users } = await initUsers()
     vi.doMock('../../packages/server/src/services/hermes/hermes-profile', () => ({