refactor(08-03): migrate session-revoked inline toast to toastStore.show()

- Remove sessionRevokedToast ref + setTimeout + inline HTML from SettingsAccountTab.vue
- Remove sessionRevokedToast ref + setTimeout + inline HTML from TotpEnrollment.vue
- Add toastStore.show('Other sessions have been terminated.', 'success') in changePassword
- Add toastStore.show('Other sessions have been terminated.', 'success') in disableTotp
- Add toastStore.show('Other sessions have been terminated.', 'success') in confirmEnrollment
- Update SettingsAccountTab.test.js to assert on mockShow instead of DOM text
- Update TotpEnrollment.test.js to assert on mockShow instead of DOM text

frontend/src/components/auth/TotpEnrollment.vue

@@ -1,27 +1,6 @@
 <template>
   <div class="space-y-4">
 
-    <!-- Sessions-revoked inline alert -->
-    <div
-      v-if="sessionRevokedToast"
-      class="flex items-center gap-3 bg-white border border-green-200 rounded-xl px-5 py-4"
-    >
-      <svg class="w-5 h-5 text-green-500 shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
-          d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
-      </svg>
-      <p class="flex-1 text-sm font-semibold text-gray-900">Other sessions have been terminated.</p>
-      <button
-        @click="sessionRevokedToast = false"
-        aria-label="Dismiss notification"
-        class="text-gray-400 hover:text-gray-600 shrink-0"
-      >
-        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
-        </svg>
-      </button>
-    </div>
-
     <!-- Step: setup — initial prompt to begin enrollment -->
     <template v-if="step === 'setup'">
       <div class="space-y-3">
@@ -131,11 +110,14 @@
 import { ref } from 'vue'
 import QRCode from 'qrcode'
 import * as api from '../../api/client.js'
+import { useToastStore } from '../../stores/toast.js'
 import AppSpinner from '../ui/AppSpinner.vue'
 import BackupCodesDisplay from './BackupCodesDisplay.vue'
 
 const emit = defineEmits(['enrolled'])
 
+const toastStore = useToastStore()
+
 const step = ref('setup')
 const qrUri = ref('')
 const qrDataUrl = ref('')
@@ -146,7 +128,6 @@ const error = ref(null)
 const loading = ref(false)
 const verified = ref(false)
 const secretCopied = ref(false)
-const sessionRevokedToast = ref(false)
 
 async function startSetup() {
   loading.value = true
@@ -172,8 +153,7 @@ async function confirmEnrollment() {
     backupCodes.value = data.backup_codes
     verified.value = true
     if (data.sessions_revoked > 0) {
-      sessionRevokedToast.value = true
-      setTimeout(() => { sessionRevokedToast.value = false }, 5000)
+      toastStore.show('Other sessions have been terminated.', 'success')
     }
     // Brief success flash before transitioning to backup codes screen
     setTimeout(() => {

frontend/src/components/auth/__tests__/TotpEnrollment.test.js

@@ -18,12 +18,19 @@ vi.mock('../../../api/client.js', () => ({
   totpEnable: vi.fn(),
 }))
 
+// Mock toast store — capture show() calls so we can assert on them
+const mockShow = vi.fn()
+vi.mock('../../../stores/toast.js', () => ({
+  useToastStore: () => ({ show: mockShow }),
+}))
+
 import { totpEnable as totpEnableMock } from '../../../api/client.js'
 import TotpEnrollment from '../TotpEnrollment.vue'
 
 beforeEach(() => {
   setActivePinia(createPinia())
   vi.clearAllMocks()
+  mockShow.mockClear()
 })
 
 describe('TotpEnrollment — QR code rendering (AUTH-03)', () => {
@@ -90,7 +97,7 @@ describe('TotpEnrollment — sessions revoked toast (CR-02)', () => {
     BackupCodesDisplay: { template: '<div />', props: ['codes'] },
   }
 
-  it('renders "Other sessions have been terminated." after totpEnable returns sessions_revoked > 0 (CR-02)', async () => {
+  it('calls toastStore.show("Other sessions have been terminated.") after totpEnable returns sessions_revoked > 0 (CR-02)', async () => {
     vi.mocked(totpEnableMock).mockResolvedValueOnce({
       backup_codes: ['CODE1', 'CODE2'],
       sessions_revoked: 1,
@@ -118,10 +125,10 @@ describe('TotpEnrollment — sessions revoked toast (CR-02)', () => {
     await verifyBtn.trigger('click')
     await flushPromises()
 
-    expect(wrapper.text()).toContain('Other sessions have been terminated.')
+    expect(mockShow).toHaveBeenCalledWith('Other sessions have been terminated.', 'success')
   })
 
-  it('does NOT render the alert when totpEnable returns sessions_revoked is 0 (CR-02 negative)', async () => {
+  it('does NOT call toastStore.show when totpEnable returns sessions_revoked is 0 (CR-02 negative)', async () => {
     vi.mocked(totpEnableMock).mockResolvedValueOnce({
       backup_codes: [],
       sessions_revoked: 0,
@@ -144,6 +151,6 @@ describe('TotpEnrollment — sessions revoked toast (CR-02)', () => {
     await verifyBtn.trigger('click')
     await flushPromises()
 
-    expect(wrapper.text()).not.toContain('Other sessions have been terminated.')
+    expect(mockShow).not.toHaveBeenCalled()
   })
 })

frontend/src/components/settings/SettingsAccountTab.vue

@@ -1,29 +1,6 @@
 <template>
   <div class="space-y-6">
 
-    <!-- Sessions-revoked toast (fixed top-right, auto-dismisses after 5s) -->
-    <div
-      v-if="sessionRevokedToast"
-      class="fixed top-4 right-4 z-50 flex items-center gap-3 bg-white border border-green-200 rounded-xl shadow-lg px-5 py-4 max-w-sm"
-    >
-      <svg class="w-5 h-5 text-green-500 shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
-          d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
-      </svg>
-      <div class="flex-1 min-w-0">
-        <p class="text-sm font-semibold text-gray-900">Other sessions have been terminated.</p>
-      </div>
-      <button
-        @click="sessionRevokedToast = false"
-        aria-label="Dismiss notification"
-        class="text-gray-400 hover:text-gray-600 shrink-0"
-      >
-        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
-        </svg>
-      </button>
-    </div>
-
     <!-- 1. Account information -->
     <section class="bg-white border border-gray-200 rounded-xl p-6">
       <h3 class="font-semibold text-gray-800 mb-4">Account information</h3>
@@ -192,6 +169,7 @@
 import { ref } from 'vue'
 import { useRouter } from 'vue-router'
 import { useAuthStore } from '../../stores/auth.js'
+import { useToastStore } from '../../stores/toast.js'
 import * as api from '../../api/client.js'
 import PasswordStrengthBar from '../auth/PasswordStrengthBar.vue'
 import TotpEnrollment from '../auth/TotpEnrollment.vue'
@@ -199,6 +177,7 @@ import ConfirmBlock from '../ui/ConfirmBlock.vue'
 import AppSpinner from '../ui/AppSpinner.vue'
 
 const authStore = useAuthStore()
+const toastStore = useToastStore()
 const router = useRouter()
 
 // ── Change password ─────────────────────────────────────────────────────────
@@ -208,7 +187,6 @@ const newPassword = ref('')
 const changingPassword = ref(false)
 const passwordError = ref(null)
 const passwordSuccess = ref(null)
-const sessionRevokedToast = ref(false)
 
 async function changePassword() {
   changingPassword.value = true
@@ -223,8 +201,7 @@ async function changePassword() {
     currentPassword.value = ''
     newPassword.value = ''
     if (data.sessions_revoked > 0) {
-      sessionRevokedToast.value = true
-      setTimeout(() => { sessionRevokedToast.value = false }, 5000)
+      toastStore.show('Other sessions have been terminated.', 'success')
     }
   } catch (e) {
     const msg = e.message || ''
@@ -260,8 +237,7 @@ async function disableTotp() {
     }
     confirmDisable2fa.value = false
     if (data.sessions_revoked > 0) {
-      sessionRevokedToast.value = true
-      setTimeout(() => { sessionRevokedToast.value = false }, 5000)
+      toastStore.show('Other sessions have been terminated.', 'success')
     }
   } catch (e) {
     totpError.value = e.message

frontend/src/components/settings/__tests__/SettingsAccountTab.test.js

@@ -14,6 +14,12 @@ vi.mock('../../../api/client.js', () => ({
   totpDisable: vi.fn(),
 }))
 
+// Mock toast store — capture show() calls so we can assert on them
+const mockShow = vi.fn()
+vi.mock('../../../stores/toast.js', () => ({
+  useToastStore: () => ({ show: mockShow }),
+}))
+
 import { useAuthStore } from '../../../stores/auth.js'
 import { changePassword as changePasswordMock, totpDisable as totpDisableMock } from '../../../api/client.js'
 import SettingsAccountTab from '../SettingsAccountTab.vue'
@@ -38,6 +44,7 @@ const globalStubs = {
 beforeEach(() => {
   setActivePinia(createPinia())
   vi.clearAllMocks()
+  mockShow.mockClear()
 })
 
 // ─── GAP 1 & 2: Sessions revoked toast (CR-01, CR-03) ──────────────────────
@@ -51,7 +58,7 @@ describe('SettingsAccountTab — sessions revoked toast (CR-01, CR-03)', () => {
     emits: ['confirmed', 'cancelled'],
   }
 
-  it('shows "Other sessions have been terminated." toast after changePassword returns sessions_revoked > 0 (CR-01)', async () => {
+  it('calls toastStore.show("Other sessions have been terminated.") after changePassword returns sessions_revoked > 0 (CR-01)', async () => {
     useAuthStore.mockReturnValue({
       user: { email: 'test@example.com', handle: 'testuser', role: 'user', totp_enabled: false },
       logoutAll: vi.fn(),
@@ -73,10 +80,10 @@ describe('SettingsAccountTab — sessions revoked toast (CR-01, CR-03)', () => {
     await wrapper.find('form').trigger('submit')
     await flushPromises()
 
-    expect(wrapper.text()).toContain('Other sessions have been terminated.')
+    expect(mockShow).toHaveBeenCalledWith('Other sessions have been terminated.', 'success')
   })
 
-  it('does NOT show toast after changePassword when sessions_revoked is 0 (CR-01 negative)', async () => {
+  it('does NOT call toastStore.show after changePassword when sessions_revoked is 0 (CR-01 negative)', async () => {
     useAuthStore.mockReturnValue({
       user: { email: 'test@example.com', handle: 'testuser', role: 'user', totp_enabled: false },
       logoutAll: vi.fn(),
@@ -97,10 +104,10 @@ describe('SettingsAccountTab — sessions revoked toast (CR-01, CR-03)', () => {
     await wrapper.find('form').trigger('submit')
     await flushPromises()
 
-    expect(wrapper.text()).not.toContain('Other sessions have been terminated.')
+    expect(mockShow).not.toHaveBeenCalled()
   })
 
-  it('shows "Other sessions have been terminated." toast after disableTotp returns sessions_revoked > 0 (CR-03)', async () => {
+  it('calls toastStore.show("Other sessions have been terminated.") after disableTotp returns sessions_revoked > 0 (CR-03)', async () => {
     const user = { email: 'test@example.com', handle: 'testuser', role: 'user', totp_enabled: true }
     useAuthStore.mockReturnValue({
       user,
@@ -127,7 +134,7 @@ describe('SettingsAccountTab — sessions revoked toast (CR-01, CR-03)', () => {
     await wrapper.find('[data-action="confirm"]').trigger('click')
     await flushPromises()
 
-    expect(wrapper.text()).toContain('Other sessions have been terminated.')
+    expect(mockShow).toHaveBeenCalledWith('Other sessions have been terminated.', 'success')
   })
 })