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/routes/ListsIndex.tsx

@@ -66,10 +66,11 @@ export function ListsIndex() {
       // TODO: surface "Couldn't delete. Try again." toast (Plan 06 / notification layer)
     },
     onSettled: () => {
-      queryClient.invalidateQueries({ queryKey: ['lists'] })
+      // fire-and-forget: cache invalidation; React Query handles the refetch lifecycle
+      void queryClient.invalidateQueries({ queryKey: ['lists'] })
     },
     onSuccess: () => {
-      navigate('/lists')
+      void navigate('/lists')
       setDeleteTarget(null)
     },
   })
@@ -195,7 +196,7 @@ export function ListsIndex() {
               </div>
               <button
                 type="button"
-                onClick={() => refetch()}
+                onClick={() => { void refetch() }}
                 style={{
                   background: 'var(--color-member-0)',
                   color: '#fff',