fix: one notepad on the quiz page, not two

Per-question notes were already built and saved on blur. The global
notes tab was still floating over the same screen beside them, so it was
never clear which notepad a note was going into. The global note stays
where it belongs, on the dashboard.

The quiz test mock had no `put`, which is why nothing had ever covered
the per-question note path; it does now.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TqXevQJhxFrM7jJg82cgZN

docs/TODO.md

@@ -217,8 +217,10 @@ Captured so nothing is lost while the article writing runs.
 
 ## Quiz runner
 
-- [ ] **Per-question notes in study mode**, replacing the global notes tab that is
-      currently on the quiz page.
+- [x] **Per-question notes** — done. The notes themselves were already built
+      (`question_notes`, saved on blur); what was missing was removing the
+      global notes tab that floated over the same screen, so it was never clear
+      which notepad you were writing in. The global note stays on the dashboard.
 - [ ] **Per-question feedback** to the educator.
 - [ ] **Tutorial mode** — first-run coach marks ("Step 2 of 6", Skip / Next).
 

frontend/src/pages/QuizPage.jsx

@@ -9,7 +9,6 @@ import { useAuth } from '../context/AuthContext'
 import api from '../api/client'
 import useMediaQuery from '../hooks/useMediaQuery'
 import FigureStrip from '../components/FigureStrip'
-import MyNote from '../components/MyNote'
 import QuizTools, { QuizDialog } from '../components/QuizTools'
 import './QuizPlayer.css'
 
@@ -1112,7 +1111,11 @@ const timerStarted = timeLeft !== null
 
   return (
     <div className="quiz-bottom quiz-player">
-      <MyNote variant="tab" />
+      {/* The floating global-notes tab is gone. A note taken while sitting a
+          question is about that question, and there is a per-question note in
+          the toolbar below; a second, unrelated notepad floating over the same
+          screen only made it ambiguous which one you were writing in. The
+          global note still lives on the dashboard. */}
       {tool && <QuizTools tool={tool} onClose={() => setTool(null)} />}
       {showReview && <QuizDialog title="Review & Complete" onClose={() => setShowReview(false)}>
         <p>{answeredCount} of {totalCount} questions answered. Unanswered questions count as incorrect.</p>

frontend/src/pages/QuizPage.test.jsx

@@ -5,9 +5,8 @@ import { MemoryRouter, Route, Routes } from 'react-router-dom'
 import QuizPage from './QuizPage'
 import api from '../api/client'
 
-vi.mock('../api/client', () => ({ default: { get: vi.fn(), post: vi.fn(), delete: vi.fn() } }))
+vi.mock('../api/client', () => ({ default: { get: vi.fn(), post: vi.fn(), put: vi.fn(), delete: vi.fn() } }))
 vi.mock('../context/AuthContext', () => ({ useAuth: () => ({ user: { id: 1, name: 'Learner', role: 'user' } }) }))
-vi.mock('../components/MyNote', () => ({ default: () => null }))
 vi.mock('../components/TeachChat', () => ({ default: ({ attemptId }) => <div data-testid="tutor-context">Study tutor {attemptId}</div> }))
 
 const questions = [
@@ -249,6 +248,23 @@ describe('quiz player', () => {
     expect(screen.queryByText('Full first clinical question.')).not.toBeInTheDocument()
   })
 
+  it('keeps notes with the question, not in a second notepad floating over it', async () => {
+    await begin()
+    const bar = await screen.findByRole('toolbar', { name: 'Question actions' })
+    // The global note tab used to float over the player alongside this one, so
+    // it was never clear which notepad you were typing into.
+    expect(document.querySelector('.mynote-tab')).toBeNull()
+
+    await userEvent.click(within(bar).getByRole('button', { name: /Add notes/ }))
+    const box = screen.getByRole('textbox', { name: /note/i })
+    await userEvent.type(box, 'Ask about vaccination status')
+    expect(screen.getByText('Unsaved')).toBeInTheDocument()
+    // Saved on blur, so a note is not written on every keystroke.
+    await userEvent.click(screen.getByRole('button', { name: 'Save note' }))
+    await waitFor(() => expect(api.put).toHaveBeenCalledWith(
+      '/questions/detail/1/note', { content: 'Ask about vaccination status' }))
+  })
+
   it('shows per-option explanations in study feedback behind a toggle', async () => {
     const originalGet = api.get.getMockImplementation()
     api.get.mockImplementation(async (url, ...args) => {