feat(highlights): increase fetch limits for better explore page coverage

- Increase friends highlights limit from 200 to 1000
- Add 1000 limit to nostrverse highlights on initial load
- Ensures users see more highlights from friends and nostrverse
- Incremental syncs continue to use 'since' filter without limit

src/services/highlights/fetchFromAuthors.ts

@@ -28,7 +28,7 @@ export const fetchHighlightsFromAuthors = async (
     const seenIds = new Set<string>()
     const rawEvents = await queryEvents(
       relayPool,
-      { kinds: [9802], authors: pubkeys, limit: 200 },
+      { kinds: [9802], authors: pubkeys, limit: 1000 },
       {
         onEvent: (event: NostrEvent) => {
           if (!seenIds.has(event.id)) {

src/services/nostrverseHighlightsController.ts

@@ -89,8 +89,13 @@ class NostrverseHighlightsController {
     )
 
     const lastSyncedAt = force ? null : this.getLastSyncedAt()
-    const filter: { kinds: number[]; since?: number } = { kinds: [KINDS.Highlights] }
-    if (lastSyncedAt) filter.since = lastSyncedAt
+    const filter: { kinds: number[]; since?: number; limit?: number } = { kinds: [KINDS.Highlights] }
+    if (lastSyncedAt) {
+      filter.since = lastSyncedAt
+    } else {
+      // On initial load, fetch more highlights
+      filter.limit = 1000
+    }
 
       const events = await queryEvents(
         relayPool,