fix(13-02): eliminate all ESLint violations — pnpm lint exits 0

- eslint.config.js: disable React Compiler rules (v7 flat.recommended enables
  them; codebase does not use the Compiler); add e2e/ to disableTypeChecked
  block; promote exhaustive-deps to error
- API broker: remove redundant as-casts (outboxWorker, poller, reminderScheduler,
  expand, sync, vevent, spike); add targeted ical.js no-unsafe-assignment/argument
  disables with justifying comments inside try blocks
- API routes/sse.ts: fix no-misused-promises on async writeSSE callback with
  void+IIFE+catch pattern
- API routes/lists.ts: let → const for updateValues
- API tests: remove unused imports (beforeEach, eq, vi); rename unused vars
  with _ prefix; remove unused lastActiveId assignment
- PWA components: void navigate() and void queryClient.invalidateQueries() on
  all fire-and-forget call sites; fix CalendarShell explicit-type-casts;
  Couldn't → HTML entity
- PWA test files: as unknown as Response for partial mock objects; string | null
  type annotation on mockLastSyncedUid; remove async from test callbacks without
  await; act(() => {}) not await act(async () => {}) for sync ops
- sw.ts: restructure Notification.data?.url access as let+if so disable
  comments land on the exact violation lines; void self.skipWaiting()

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

@@ -12,7 +12,7 @@
 
 import React from 'react'
 import { describe, it, expect, vi, beforeEach } from 'vitest'
-import { render, screen, waitFor } from '@testing-library/react'
+import { render, screen } from '@testing-library/react'
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 
 // ── Module mocks ────────────────────────────────────────────────────────────

apps/pwa/src/components/CalendarShell.tsx

@@ -156,7 +156,7 @@ export function CalendarShell() {
   // IANATimezone (the config's timezone type) is declared but not exported by @schedule-x/calendar,
   // so derive it from useCalendarApp's config parameter rather than importing it.
   type SxTimeZone = NonNullable<Parameters<typeof useCalendarApp>[0]['timezone']>
-  const displayTimeZone = Intl.DateTimeFormat().resolvedOptions().timeZone as SxTimeZone
+  const displayTimeZone: SxTimeZone = Intl.DateTimeFormat().resolvedOptions().timeZone
 
   // useCalendarApp — config is stable; plugins passed as second argument
   const calendar = useCalendarApp(
@@ -169,7 +169,7 @@ export function CalendarShell() {
       ],
       defaultView,
       timezone: displayTimeZone,
-      firstDayOfWeek: SX_FIRST_DAY_OF_WEEK as 7,
+      firstDayOfWeek: SX_FIRST_DAY_OF_WEEK,
       calendars: calendarsConfig,
       callbacks: {
         onRangeUpdate(range) {
@@ -197,7 +197,7 @@ export function CalendarShell() {
   useEffect(() => {
     if (!eventsQuery.data) return
     const sxEvents = hydrateEvents(eventsQuery.data.occurrences)
-    eventsService.set(sxEvents as Parameters<typeof eventsService.set>[0])
+    eventsService.set(sxEvents)
   }, [eventsQuery.data, eventsService])
 
   // Auth redirect — one-shot full-page nav to /api/login when /api/me fails.
@@ -351,7 +351,7 @@ export function CalendarShell() {
                   color: 'var(--color-text-primary)',
                 }}
               >
-                Couldn't load events
+                Couldn&apos;t load events
               </h2>
               <p
                 style={{
@@ -363,7 +363,7 @@ export function CalendarShell() {
                 Check your connection and try again.
               </p>
               <button
-                onClick={() => queryClient.refetchQueries({ queryKey: ['events'] })}
+                onClick={() => { void queryClient.refetchQueries({ queryKey: ['events'] }) }}
                 style={{
                   background: 'var(--color-surface-dim)',
                   border: '1px solid var(--color-border)',

apps/pwa/src/components/CreateListSheet.tsx

@@ -22,7 +22,7 @@
 import { useEffect, useRef, useState } from 'react'
 import { useMutation, useQueryClient } from '@tanstack/react-query'
 import { createList } from '../api/listsClient.js'
-import type { List, ListsResponse } from '../api/listsClient.js'
+import type { ListsResponse } from '../api/listsClient.js'
 import { useListsStore } from '../store/listsStore.js'
 
 export function CreateListSheet() {
@@ -82,7 +82,7 @@ export function CreateListSheet() {
             ownerId: 0, // unknown until response
             activeCount: 0,
             doneCount: 0,
-          } as List,
+          },
         ],
       }))
       return { previous }
@@ -94,8 +94,8 @@ export function CreateListSheet() {
       }
     },
     onSettled: () => {
-      // Always invalidate to get canonical server state
-      queryClient.invalidateQueries({ queryKey: ['lists'] })
+      // Always invalidate to get canonical server state; fire-and-forget (React Query handles cache update)
+      void queryClient.invalidateQueries({ queryKey: ['lists'] })
     },
     onSuccess: () => {
       handleClose()

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

@@ -33,7 +33,7 @@ const {
   mockSetLastSyncedUid: vi.fn(),
   mockSetOpenEventId: vi.fn(),
   mockDeleteDialogOpen: { value: true },
-  mockDeleteDialogUid: { value: 'event-uid-to-delete' as string | null },
+  mockDeleteDialogUid: { value: 'event-uid-to-delete' },
 }))
 
 vi.mock('../store/calendarStore.js', () => ({

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

@@ -332,7 +332,7 @@ describe('EventForm', () => {
     const tomorrow = new Date(today)
     tomorrow.setDate(today.getDate() + 1)
     const todayStr = today.toISOString().slice(0, 10)
-    const yesterdayStr = new Date(today.setDate(today.getDate() - 1)).toISOString().slice(0, 10)
+    const _yesterdayStr = new Date(today.setDate(today.getDate() - 1)).toISOString().slice(0, 10)
 
     if (dateInputs.length >= 2) {
       fireEvent.change(dateInputs[0], { target: { value: todayStr } })
@@ -462,7 +462,7 @@ describe('EventForm', () => {
       eventOccurrence: EDIT_OCCURRENCE,
     })
 
-    const titleInput = screen.getByPlaceholderText('Event title') as HTMLInputElement
+    const titleInput = screen.getByPlaceholderText<HTMLInputElement>('Event title')
     expect(titleInput.value).toBe('Existing Meeting')
   })
 })
@@ -560,7 +560,7 @@ describe('EventForm — Plan 03-12 gap closures', () => {
     )
 
     // Title should be empty (occurrence not yet in cache)
-    const titleInput = screen.getByPlaceholderText('Event title') as HTMLInputElement
+    const titleInput = screen.getByPlaceholderText<HTMLInputElement>('Event title')
     expect(titleInput.value).toBe('')
 
     // Phase 2: occurrence arrives in cache (simulating TanStack Query resolving)
@@ -576,7 +576,7 @@ describe('EventForm — Plan 03-12 gap closures', () => {
     // WR-03 fix: the reset effect must re-run because occurrence changed,
     // so the title should now be populated
     await waitFor(() => {
-      const titleInputAfter = screen.getByPlaceholderText('Event title') as HTMLInputElement
+      const titleInputAfter = screen.getByPlaceholderText<HTMLInputElement>('Event title')
       expect(titleInputAfter.value).toBe('Late-Arriving Meeting')
     })
   })
@@ -676,7 +676,7 @@ describe('EventForm — Plan 03-12 gap closures', () => {
 
   it('IN-03: todayIso is exported from calendarStore (single source of truth)', async () => {
     // Use importActual to bypass the vi.mock() and test the real module export
-    const actualModule = await vi.importActual('../store/calendarStore.js') as Record<string, unknown>
+    const actualModule = await vi.importActual('../store/calendarStore.js')
     expect(typeof actualModule.todayIso).toBe('function')
     const result = (actualModule.todayIso as () => string)()
     // Should return a YYYY-MM-DD string
@@ -950,9 +950,11 @@ describe('EventForm — Plan 06-06 end-tracking + recurrence-bound', () => {
 
     await waitFor(() => {
       expect(mockCreateEvent).toHaveBeenCalledWith(
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment -- expect.anything() returns 'any' (Vitest asymmetric matcher); safe in assertion context
         expect.not.objectContaining({ recurrenceUntil: expect.anything() }),
       )
       expect(mockCreateEvent).toHaveBeenCalledWith(
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment -- expect.anything() returns 'any' (Vitest asymmetric matcher); safe in assertion context
         expect.not.objectContaining({ recurrenceCount: expect.anything() }),
       )
     })

apps/pwa/src/components/EventForm.tsx

@@ -271,7 +271,7 @@ export function EventForm() {
       // read it if a future API version adds it, and default to 'none' when not present
       // (WR-03 v1 comment: occurrence edits whose recurrence is not in the cache default
       // to 'none'; this will be addressed when the occurrence/expand contract is extended).
-      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/no-unsafe-member-access -- occurrence.recurrence is not in CalendarOccurrence v1 type; cast to any to read a future API field, default 'none' when absent
       const derivedRecurrence = (occurrence as any)?.recurrence as RecurrencePreset | undefined
       setRecurrence(derivedRecurrence ?? 'none')
       // D-06: reset bound state to defaults on form open/occurrence change

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

@@ -91,7 +91,7 @@ describe('useAndroidInstallPrompt', () => {
     vi.clearAllMocks()
   })
 
-  it('sets canInstall=true when a beforeinstallprompt event is dispatched', async () => {
+  it('sets canInstall=true when a beforeinstallprompt event is dispatched', () => {
     const { result } = renderHook(() => useAndroidInstallPrompt())
     expect(result.current.canInstall).toBe(false)
 
@@ -109,7 +109,7 @@ describe('useAndroidInstallPrompt', () => {
     expect(result.current.canInstall).toBe(true)
   })
 
-  it('sets canInstall=false when appinstalled event fires', async () => {
+  it('sets canInstall=false when appinstalled event fires', () => {
     const { result } = renderHook(() => useAndroidInstallPrompt())
 
     // First fire beforeinstallprompt to set canInstall=true

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

@@ -14,7 +14,7 @@ import { render, screen, fireEvent } from '@testing-library/react'
 
 vi.mock('../hooks/usePushSubscription.js', () => ({
   usePushSubscription: vi.fn(() => ({
-    permission: 'denied' as NotificationPermission,
+    permission: 'denied',
     isSubscribed: false,
     subscribe: vi.fn(),
     setEnabled: vi.fn(),

apps/pwa/src/components/ListCard.tsx

@@ -39,7 +39,7 @@ export function ListCard({ list, onDelete }: ListCardProps) {
   const [showDelete, setShowDelete] = useState(false)
 
   const handleCardClick = () => {
-    navigate(`/lists/${list.id}`)
+    void navigate(`/lists/${list.id}`)
   }
 
   const handleDeleteClick = (e: React.MouseEvent) => {

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

@@ -78,7 +78,7 @@ describe('SyncStateToast', () => {
     vi.useRealTimers()
   })
 
-  it('renders nothing when lastSyncedUid is null', async () => {
+  it('renders nothing when lastSyncedUid is null', () => {
     mockLastSyncedUid.value = null
     const { container } = renderToast(queryClient)
     expect(container.firstChild).toBeNull()