---
phase: 08-stack-upgrade-backend-decomposition
plan: 03
type: execute
wave: 1
depends_on: [08-01]
files_modified:
  - frontend/src/stores/toast.js
  - frontend/src/components/settings/SettingsAccountTab.vue
  - frontend/src/components/auth/TotpEnrollment.vue
  - backend/tests/test_auth.py
autonomous: true
requirements: [CR-01, CR-02, CR-03]
tags: [phase-7.1, toast-stub, session-revocation, frontend]
must_haves:
  truths:
    - "frontend/src/stores/toast.js exists, exports useToastStore, exposes show(message, type, duration)"
    - "show() is a silent no-op in this phase (Phase 10 will render); calling it never throws"
    - "SettingsAccountTab.vue calls toastStore.show('Other sessions have been terminated.', 'success') when data.sessions_revoked > 0 in both changePassword and disableTotp handlers"
    - "TotpEnrollment.vue calls toastStore.show('Other sessions have been terminated.', 'success') when data.sessions_revoked > 0 in confirmEnrollment handler"
    - "Inline sessionRevokedToast ref + setTimeout + inline toast template blocks are removed from both components"
    - "CR-01, CR-02, CR-03 tests run as plain passing tests (xfail decorator removed)"
  artifacts:
    - path: "frontend/src/stores/toast.js"
      provides: "Pinia toast store stub with the show() contract Phase 10 must honor"
      contains: "export const useToastStore"
    - path: "frontend/src/components/settings/SettingsAccountTab.vue"
      provides: "Refactored to use toastStore.show() in changePassword + disableTotp handlers"
      contains: "toastStore.show"
    - path: "frontend/src/components/auth/TotpEnrollment.vue"
      provides: "Refactored to use toastStore.show() in confirmEnrollment handler"
      contains: "toastStore.show"
    - path: "backend/tests/test_auth.py"
      provides: "Three session-revocation tests promoted from xfail to passing"
      contains: "test_change_password_revokes_other_sessions"
  key_links:
    - from: "SettingsAccountTab.vue changePassword handler"
      to: "useToastStore.show"
      via: "function call when data.sessions_revoked > 0"
      pattern: "toastStore\\.show\\(['\"]Other sessions have been terminated"
    - from: "TotpEnrollment.vue confirmEnrollment handler"
      to: "useToastStore.show"
      via: "function call when data.sessions_revoked > 0"
      pattern: "toastStore\\.show\\(['\"]Other sessions have been terminated"
---

<objective>
Complete the absorbed Phase 7.1 work. The backend code for CR-01/CR-02/CR-03 is already implemented in `backend/api/auth.py` (RESEARCH.md confirmed lines 518, 615, 662). This plan: (1) creates the `useToastStore` Pinia stub per the UI-SPEC.md contract, (2) replaces the inline `sessionRevokedToast` ref + `setTimeout` pattern in `SettingsAccountTab.vue` and `TotpEnrollment.vue` with `toastStore.show(...)` calls, (3) removes the inline toast HTML blocks from both components, and (4) promotes the three CR xfail stubs from plan 08-01 to passing tests.

Purpose: Ship CR-01/CR-02/CR-03 to the user-visible behavior contract that the UI-SPEC.md locks (toast on `sessions_revoked > 0`), with the call signature Phase 10 must honor without modifying any Phase 8 call site.

Output: New toast store, refactored two Vue components, promoted three backend tests.
</objective>

<execution_context>
@$HOME/.claude/get-shit-done/workflows/execute-plan.md
@$HOME/.claude/get-shit-done/templates/summary.md
</execution_context>

<context>
@.planning/PROJECT.md
@.planning/ROADMAP.md
@.planning/STATE.md
@.planning/phases/08-stack-upgrade-backend-decomposition/08-CONTEXT.md
@.planning/phases/08-stack-upgrade-backend-decomposition/08-RESEARCH.md
@.planning/phases/08-stack-upgrade-backend-decomposition/08-PATTERNS.md
@.planning/phases/08-stack-upgrade-backend-decomposition/08-UI-SPEC.md
@frontend/src/stores/topics.js
@frontend/src/components/settings/SettingsAccountTab.vue
@frontend/src/components/auth/TotpEnrollment.vue
@backend/tests/test_auth.py

<interfaces>
<!-- The locked store API contract from UI-SPEC.md §"useToastStore API Contract": -->
toastStore.show(message: string, type: 'success'|'error'|'info' = 'success', duration: number = 4000): void

<!-- Trigger map from UI-SPEC.md §"Sessions-Revoked Notification — Interaction Contract": -->
SettingsAccountTab.vue / changePassword()  → on data.sessions_revoked > 0 → toastStore.show('Other sessions have been terminated.', 'success')
SettingsAccountTab.vue / disableTotp()     → on data.sessions_revoked > 0 → toastStore.show('Other sessions have been terminated.', 'success')
TotpEnrollment.vue   / confirmEnrollment() → on data.sessions_revoked > 0 → toastStore.show('Other sessions have been terminated.', 'success')

<!-- Existing inline state to remove (from grep): -->
SettingsAccountTab.vue: lines 6, 17, 211, 226-227, 263-264 (sessionRevokedToast ref + setTimeout + inline HTML block)
TotpEnrollment.vue:   lines 6, 15, 149, 175-176 (sessionRevokedToast ref + setTimeout + inline HTML block)
</interfaces>
</context>

<tasks>

<task type="auto" tdd="true">
  <name>Task 1: Create useToastStore Pinia stub at frontend/src/stores/toast.js</name>
  <files>frontend/src/stores/toast.js</files>
  <read_first>
    - frontend/src/stores/topics.js (simplest existing Pinia store — copy the setup-store style with defineStore + named function exports)
    - .planning/phases/08-stack-upgrade-backend-decomposition/08-UI-SPEC.md §"useToastStore API Contract" (exact signature, default values, "MUST NOT" rules)
    - .planning/phases/08-stack-upgrade-backend-decomposition/08-PATTERNS.md §"frontend/src/stores/toast.js" (full stub template)
  </read_first>
  <behavior>
    - Importing `useToastStore` from `'../stores/toast.js'` resolves successfully
    - Calling `useToastStore().show('hello')` returns `undefined` and does not throw
    - Calling `useToastStore().show('hello', 'error')` returns `undefined` and does not throw
    - Calling `useToastStore().show('hello', 'success', 8000)` returns `undefined` and does not throw
    - The store does not render any DOM element (verified visually — Phase 10 implements rendering)
  </behavior>
  <action>
Create `frontend/src/stores/toast.js`. Use the setup-store style (`defineStore('toast', () => { ... })`). Define a single function `show(message, type = 'success', duration = 4000)` with positional parameters only (the UI-SPEC explicitly forbids object-argument shape `show({message, type})`). The function body is empty (no-op stub). Return `{ show }` so the store exposes the method. Add a top-of-file docstring (JS comment block) stating: Phase 7.1 STUB — Phase 10 (UX-10) fills in the full implementation; the signature `show(message, type, duration)` is locked and Phase 10 must honor it without modifying Phase 8 call sites. Default values match UI-SPEC.md: `type = 'success'` (NOT `'info'`), `duration = 4000`. Export as named export: `export const useToastStore = defineStore(...)`. Do NOT import or depend on any component.
  </action>
  <verify>
    <automated>cd frontend && node -e "import('./src/stores/toast.js').then(m => { const s = m.useToastStore; if (typeof s !== 'function') throw new Error('useToastStore not a function'); console.log('ok'); })" 2>&1 | tail -5</automated>
  </verify>
  <acceptance_criteria>
    - File `frontend/src/stores/toast.js` exists
    - `grep -c "export const useToastStore" frontend/src/stores/toast.js` returns 1
    - `grep -c "defineStore('toast'" frontend/src/stores/toast.js` returns 1
    - `grep -c "function show(message, type = 'success', duration = 4000)" frontend/src/stores/toast.js` returns 1
    - `cd frontend && npm test -- --run stores/toast 2>/dev/null || true` does not throw an import error
    - The file contains NO `import` of any Vue component or DOM API
  </acceptance_criteria>
  <done>toast.js exists with the exact UI-SPEC signature; the module imports cleanly; show() is a silent no-op.</done>
</task>

<task type="auto">
  <name>Task 2: Refactor SettingsAccountTab.vue and TotpEnrollment.vue to use toastStore</name>
  <files>frontend/src/components/settings/SettingsAccountTab.vue, frontend/src/components/auth/TotpEnrollment.vue</files>
  <read_first>
    - frontend/src/components/settings/SettingsAccountTab.vue (full file — current inline toast HTML at lines 5-25, `sessionRevokedToast` ref at line 211, setTimeouts in changePassword at 225-228 and disableTotp at 261-264)
    - frontend/src/components/auth/TotpEnrollment.vue (full file — current inline toast HTML at lines 5-23, `sessionRevokedToast` ref at line 149, setTimeout in confirmEnrollment at 174-177)
    - frontend/src/stores/toast.js (the stub created in task 1)
    - .planning/phases/08-stack-upgrade-backend-decomposition/08-UI-SPEC.md §"Sessions-Revoked Notification — Interaction Contract" (message copy locked exactly: 'Other sessions have been terminated.')
  </read_first>
  <action>
For `frontend/src/components/settings/SettingsAccountTab.vue`:
  1. Delete the inline `<div v-if="sessionRevokedToast" ...>...</div>` template block (lines ~5-25 — the fixed-position toast).
  2. Delete the line `const sessionRevokedToast = ref(false)` (~line 211).
  3. In the `changePassword` handler (~lines 220-230), replace `sessionRevokedToast.value = true; setTimeout(() => { sessionRevokedToast.value = false }, 5000)` with `toastStore.show('Other sessions have been terminated.', 'success')`. Keep the surrounding `if (data.sessions_revoked > 0) { ... }` guard.
  4. In the `disableTotp` handler (~lines 258-267), apply the same replacement.
  5. Add `import { useToastStore } from '../../stores/toast.js'` at the top with the other imports.
  6. Add `const toastStore = useToastStore()` near the other store/ref declarations in `<script setup>`.
  7. If `ref` is no longer used anywhere else in the file, remove it from the `vue` import; otherwise leave the import untouched.

For `frontend/src/components/auth/TotpEnrollment.vue`:
  1. Delete the inline `<div v-if="sessionRevokedToast" ...>...</div>` template block (lines ~5-23).
  2. Delete the line `const sessionRevokedToast = ref(false)` (~line 149).
  3. In the `confirmEnrollment` handler (~lines 170-180), replace the `sessionRevokedToast.value = true; setTimeout(...)` block with `toastStore.show('Other sessions have been terminated.', 'success')`. Keep the surrounding `if (data.sessions_revoked > 0) { ... }` guard.
  4. Add `import { useToastStore } from '../../stores/toast.js'` at the top.
  5. Add `const toastStore = useToastStore()` near the other store/ref declarations.
  6. Same `ref` cleanup rule as above.

The message string MUST be exactly `'Other sessions have been terminated.'` (matches UI-SPEC.md and the previously displayed inline copy). The `type` argument MUST be `'success'` (not `'info'`). Do NOT pass a `duration` argument — let the default 4000ms apply.

Update any existing Vitest tests (`SettingsAccountTab.test.js`, `TotpEnrollment.test.js`) ONLY if they explicitly assert on `sessionRevokedToast` or the inline DOM block. Mock `useToastStore` via `vi.mock('../../stores/toast.js', () => ({ useToastStore: () => ({ show: vi.fn() }) }))` and assert the mock was called with the locked message string. If tests already pass after the refactor without changes, do not touch them.
  </action>
  <verify>
    <automated>cd frontend && npm test 2>&1 | tail -30</automated>
  </verify>
  <acceptance_criteria>
    - `grep -c "sessionRevokedToast" frontend/src/components/settings/SettingsAccountTab.vue` returns 0
    - `grep -c "sessionRevokedToast" frontend/src/components/auth/TotpEnrollment.vue` returns 0
    - `grep -c "toastStore.show('Other sessions have been terminated\\.', 'success')" frontend/src/components/settings/SettingsAccountTab.vue` returns 2 (changePassword + disableTotp)
    - `grep -c "toastStore.show('Other sessions have been terminated\\.', 'success')" frontend/src/components/auth/TotpEnrollment.vue` returns 1 (confirmEnrollment)
    - `grep -c "from '../../stores/toast.js'" frontend/src/components/settings/SettingsAccountTab.vue` returns 1
    - `grep -c "from '../../stores/toast.js'" frontend/src/components/auth/TotpEnrollment.vue` returns 1
    - `grep -c "setTimeout" frontend/src/components/settings/SettingsAccountTab.vue` returns 0 (the only setTimeouts in this file were for the toast)
    - `cd frontend && npm test` exits 0
  </acceptance_criteria>
  <done>Both components removed the inline ref/setTimeout/HTML, both wire to toastStore.show with the locked copy, frontend test suite passes.</done>
</task>

<task type="auto">
  <name>Task 3: Promote three CR test stubs in test_auth.py from xfail to passing</name>
  <files>backend/tests/test_auth.py</files>
  <read_first>
    - backend/tests/test_auth.py (find the three xfail-decorated tests added in plan 08-01: test_change_password_revokes_other_sessions, test_enable_totp_revokes_other_sessions, test_disable_totp_revokes_other_sessions)
  </read_first>
  <action>
For each of the three tests added in plan 08-01, remove the `@pytest.mark.xfail(reason="Wave 0 stub — promoted to passing in 08-03", strict=False)` decorator line. Leave the function bodies untouched (the assertion logic was already complete in plan 08-01). Run the three tests in strict mode to confirm they pass against the existing backend implementation. Do not modify any other test or any production code.
  </action>
  <verify>
    <automated>cd backend && pytest tests/test_auth.py::test_change_password_revokes_other_sessions tests/test_auth.py::test_enable_totp_revokes_other_sessions tests/test_auth.py::test_disable_totp_revokes_other_sessions -x -v</automated>
  </verify>
  <acceptance_criteria>
    - `grep -B1 "def test_change_password_revokes_other_sessions" backend/tests/test_auth.py | grep -c "xfail"` returns 0
    - `grep -B1 "def test_enable_totp_revokes_other_sessions" backend/tests/test_auth.py | grep -c "xfail"` returns 0
    - `grep -B1 "def test_disable_totp_revokes_other_sessions" backend/tests/test_auth.py | grep -c "xfail"` returns 0
    - Pytest output shows all three test IDs with status `PASSED` (not XFAIL, not XPASS, not SKIPPED)
    - `cd backend && pytest -v` exits 0 with no new failures vs. baseline
  </acceptance_criteria>
  <done>Three xfail decorators removed; three tests pass strictly; full backend suite green.</done>
</task>

</tasks>

<threat_model>
## Trust Boundaries

| Boundary | Description |
|----------|-------------|
| Vue component → Pinia toast store | In-process function call; no untrusted input crosses |
| Backend response (sessions_revoked) → frontend toast trigger | Backend value is already validated server-side; frontend only uses the boolean test `> 0` |

## STRIDE Threat Register

| Threat ID | Category | Component | Disposition | Mitigation Plan |
|-----------|----------|-----------|-------------|-----------------|
| T-08-03-01 | Spoofing | Toast message injection | mitigate | Message string is a literal in the call sites, not user-controlled; Phase 10 contract specifies plain text only (no HTML) |
| T-08-03-02 | Repudiation | Audit log for revoked sessions | mitigate | Backend (api/auth.py) already writes audit log with `metadata_={"sessions_revoked": revoked}` for all three handlers; this plan does not alter audit behavior |
| T-08-03-03 | Information Disclosure | Toast leaks session count | accept | UI shows generic "Other sessions have been terminated."; the exact count is not revealed to the UI |
| T-08-03-04 | Tampering | xfail strict=False masks regression | mitigate | Decorator removed in task 3; subsequent pytest runs are strict |
| T-08-03-SC | Supply Chain | pinia, vue, pytest unchanged | accept | No new packages added |
</threat_model>

<verification>
- `cd frontend && npm test` — zero failures
- `cd backend && pytest tests/test_auth.py -v` — three new tests show PASSED (not XPASS / XFAIL)
- Visual smoke (recommended for executor, not gating): `cd frontend && npm run dev`, change password while logged in on two browsers; the second browser session should be revoked (this is backend behavior — Phase 10 will make the toast visible)
- `grep -rn "sessionRevokedToast" frontend/src/` returns no matches
</verification>

<success_criteria>
- toast.js stub exists with the UI-SPEC signature
- Both components wire to toastStore.show with the locked message
- All three CR tests pass strictly (no xfail)
- Full backend + frontend test suites pass
</success_criteria>

<output>
Create `.planning/phases/08-stack-upgrade-backend-decomposition/08-03-SUMMARY.md` when done. Include: exact final test output for the three CR tests, confirmation that no other components were touched, and a flagged forward-reference to Phase 10 (UX-10) that the toast store contract is locked.
</output>