fix(03): WR-01/WR-02/IN-02 recurrence-edit helper text, all-day toggle clamp, edit-mode parse-failure guard

apps/pwa/src/components/EventForm.test.tsx

@@ -262,6 +262,36 @@ describe('EventForm', () => {
     expect(timeInputs.length).toBeGreaterThan(0)
   })
 
+  // WR-02 (iteration 2): toggling all-day ON deterministically clamps endDate to
+  // max(startDate, endDate). When the end day is BEHIND the start day, it snaps forward
+  // to a single-day event rather than validating as an inconsistent span, and any stale
+  // end-time error from the timed view is cleared.
+  it('toggling All-day ON clamps an end date that is behind the start date up to the start date', async () => {
+    renderForm()
+    fireEvent.change(screen.getByPlaceholderText('Event title'), {
+      target: { value: 'Span Title' },
+    })
+    const dateInputs = document.querySelectorAll('input[type="date"]')
+    expect(dateInputs.length).toBeGreaterThanOrEqual(2)
+    // Start 2026-06-10, end 2026-06-09 (end behind start) — invalid timed span
+    fireEvent.change(dateInputs[0], { target: { value: '2026-06-10' } })
+    fireEvent.change(dateInputs[1], { target: { value: '2026-06-09' } })
+
+    // Toggle all-day ON: endDate must clamp up to the start date (single-day event)
+    const allDaySwitch = screen.getByRole('switch')
+    fireEvent.click(allDaySwitch)
+
+    const dateInputsAfter = document.querySelectorAll('input[type="date"]')
+    expect((dateInputsAfter[1] as HTMLInputElement).value).toBe('2026-06-10')
+
+    // The clamped all-day event validates cleanly (no end-time error surfaced)
+    const saveButton = screen.getByText('Create Event')
+    fireEvent.click(saveButton)
+    await waitFor(() => {
+      expect(screen.queryByText('End time must be after start')).toBeNull()
+    })
+  })
+
   // ── Calendar picker D-02 ───────────────────────────────────────────────────
 
   it('calendar picker is absent when fetchWritableCalendars returns 1 calendar (D-02)', () => {
@@ -368,6 +398,39 @@ describe('EventForm', () => {
     })
   })
 
+  // WR-01 (iteration 2): edit mode shows explanatory helper text near the disabled
+  // recurrence select so the locked schedule is not a silent surprise.
+  it('WR-01: edit mode surfaces helper text that repeat cannot be changed', () => {
+    renderForm({ mode: 'edit', uid: 'edit-uid-456', eventOccurrence: EDIT_OCCURRENCE })
+    expect(screen.getByText(/Repeat can't be changed yet/i)).toBeDefined()
+  })
+
+  it('WR-01: create mode does NOT show the repeat helper text', () => {
+    renderForm({ mode: 'create' })
+    expect(screen.queryByText(/Repeat can't be changed yet/i)).toBeNull()
+  })
+
+  // IN-02 (iteration 2): in edit mode an unparseable cached start/end must leave the
+  // field blank and block submit, rather than silently rewriting the event to today/09:00.
+  it('IN-02: edit mode with an unparseable start leaves the date blank and blocks submit', async () => {
+    const corruptOccurrence: CalendarOccurrence = {
+      ...EDIT_OCCURRENCE,
+      start: 'not-a-real-date',
+    }
+    renderForm({ mode: 'edit', uid: 'edit-uid-456', eventOccurrence: corruptOccurrence })
+
+    // The start date input must be blank (not today's date)
+    const dateInputs = document.querySelectorAll('input[type="date"]')
+    expect((dateInputs[0] as HTMLInputElement).value).toBe('')
+
+    // Submit must be blocked with a guidance message; updateEvent must NOT fire.
+    fireEvent.click(screen.getByText('Save Changes'))
+    await waitFor(() => {
+      expect(screen.getByText(/Couldn't read this event's date/i)).toBeDefined()
+    })
+    expect(mockUpdateEvent).not.toHaveBeenCalled()
+  })
+
   // ── Close behaviors ────────────────────────────────────────────────────────
 
   it('pressing Escape closes the form', () => {