fix: retry individual Apple calendar fetches on network timeout

Batch errors like 'fetch failed' were only retried at the login/client-init
level. Per-calendar fetchCalendarObjects calls had no retry, so a single
transient iCloud network timeout silently dropped all events from that
calendar. Now wraps each fetchCalendarObjects with withRetry(2 retries, 3s/6s).

v1.77.5

package.json

@@ -1,6 +1,6 @@
 {
   "name": "my-weekly-todo-list",
-  "version": "1.77.4",
+  "version": "1.77.5",
   "description": "A web-based weekly task management application that organizes to-dos and calendar events in a single, intuitive weekly view",
   "main": "index.js",
   "scripts": {

src/lib/apple-calendar.ts

@@ -496,13 +496,16 @@ export const getUpcomingEventsBatch = async (
           continue;
         }
 
-        const events = await client.fetchCalendarObjects({
-          calendar: targetCalendar,
-          timeRange: {
-            start: new Date(timeMin).toISOString(),
-            end: new Date(timeMax).toISOString(),
-          },
-        });
+        const events = await withRetry(
+          () => client.fetchCalendarObjects({
+            calendar: targetCalendar,
+            timeRange: {
+              start: new Date(timeMin).toISOString(),
+              end: new Date(timeMax).toISOString(),
+            },
+          }),
+          2, `fetchCalendarObjects:${calendarUrl.split('/').pop()}`
+        );
 
         const parsedEvents: AppleCalendarEvent[] = [];
         const minTime = new Date(timeMin).getTime();