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/api/src/broker/expand.ts

@@ -180,11 +180,13 @@ export function expandOccurrences(
   // --- 1. Parse VCALENDAR — return [] on malformed input (matches sync.ts pattern) ---
   let parsed: ReturnType<typeof ICAL.parse>
   try {
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment -- ical.js parse() returns 'any'; result is only passed to ICAL.Component which accepts it
     parsed = ICAL.parse(rawVevent)
   } catch {
     return []
   }
 
+  // eslint-disable-next-line @typescript-eslint/no-unsafe-argument -- ical.js parse() output is 'any'; ICAL.Component is the correct consumer of this value
   const comp = new ICAL.Component(parsed)
 
   // --- 2. Register VTIMEZONE components BEFORE constructing RecurExpansion (MANDATORY) ---
@@ -230,7 +232,7 @@ export function expandOccurrences(
       // Use ICAL.Event.endDate which derives end from DTEND, or DTSTART+DURATION, or sensible default.
       // Do NOT use getFirstPropertyValue('dtend') directly — events with only DURATION set return null,
       // producing zero-duration occurrences (BUG 1).
-      let occEnd: ICAL.Time = (event.endDate ?? dtstart) as ICAL.Time
+      let occEnd: ICAL.Time = event.endDate ?? dtstart
 
       // Positive-duration guard: ensure timed events have non-zero height in Schedule-X.
       if (!allDay && occEnd.compare(dtstart) <= 0) {