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/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()