fix: ensure secondary sort by id ascending when sorting by createdAt descending

When events share the same createdAt timestamp, the tiebreaker sort by id
must be ascending to produce a stable, deterministic order. Fixed several
locations that either had no secondary sort, used descending id sort, or
used .reversed() which incorrectly flipped both sort directions.

https://claude.ai/code/session_01RvuyPf1x9wLf2DCgsSXLGz

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/ui/ReadsScreen.kt

@@ -196,7 +196,7 @@ fun ReadsScreen(
         remember {
             EventCollectionState<LongTextNoteEvent>(
                 getId = { it.id },
-                sortComparator = compareByDescending { it.publishedAt() ?: it.createdAt },
+                sortComparator = compareByDescending<LongTextNoteEvent> { it.publishedAt() ?: it.createdAt }.thenBy { it.id },
                 maxSize = 100,
                 scope = scope,
             )

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/ui/UserProfileScreen.kt

@@ -829,7 +829,7 @@ fun UserProfileScreen(
                             }
                         } else {
                             items(
-                                articleEvents.sortedByDescending { it.publishedAt() ?: it.createdAt },
+                                articleEvents.sortedWith(compareByDescending<LongTextNoteEvent> { it.publishedAt() ?: it.createdAt }.thenBy { it.id }),
                                 key = { "art-${it.id}" },
                             ) { article ->
                                 LongFormCard(
@@ -871,7 +871,7 @@ fun UserProfileScreen(
                             }
                         } else {
                             items(
-                                highlightEvents.sortedByDescending { it.createdAt },
+                                highlightEvents.sortedWith(compareByDescending<HighlightEvent> { it.createdAt }.thenBy { it.id }),
                                 key = { "hl-${it.id}" },
                             ) { highlight ->
                                 PublishedHighlightCard(