perf(note types): second pass — fix more missing remember keys

Follow-up to the first perf pass. Same goal: cut allocation cost for
note rows that scroll inside LazyColumn feeds.

- AppDefinition: key the `remember { tags.toImmutableListOfLists() }`
  block by `note` so it actually invalidates when the note changes
- NIP90ContentDiscoveryResponse: drop the `remember(note) {
  Modifier.fillMaxWidth() }` wrapper — `Modifier.fillMaxWidth()` is a
  constant call
- PeopleList: key the `derivedStateOf` for `name` by `noteEvent`, and
  switch `LaunchedEffect(Unit)` to `LaunchedEffect(noteEvent)` so the
  participants reload when the underlying event changes
- PinList: replace `val pins by remember { mutableStateOf(noteEvent
  .pinnedEvents()) }` with `val pins = remember(noteEvent) { … }` —
  the `mutableStateOf` wrapper was unnecessary and the missing key
  meant `pins` could go stale on event updates
- LongForm: return the `topics` list as `ImmutableList` so Compose
  treats it as a stable parameter to the consuming `forEach`
- RelayList: drop the `mutableStateOf(RelayListCard(…))` wrap inside
  4 `remember` blocks (DisplayRelaySet, DisplayNIP65RelayList write/
  read, DisplayDMRelayList) — the value never changes after creation;
  also key by `noteEvent` rather than `baseNote`, and cache
  `noteEvent.description()`
- Torrent: wrap `noteEvent.title() + totalSizeBytes()`, content
  comparison and `files().toImmutableList()` in `remember(noteEvent)`
  so they don't recompute and reallocate on every recomposition

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/AppDefinition.kt

@@ -216,7 +216,7 @@ fun RenderAppDefinition(
                         CreateTextWithEmoji(
                             text = it,
                             tags =
-                                remember {
+                                remember(note) {
                                     (note.event?.tags ?: emptyArray()).toImmutableListOfLists()
                                 },
                             fontWeight = FontWeight.Bold,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/LongForm.kt

@@ -64,6 +64,7 @@ import com.vitorpamplona.amethyst.ui.theme.Size5dp
 import com.vitorpamplona.amethyst.ui.theme.grayText
 import com.vitorpamplona.amethyst.ui.theme.replyModifier
 import com.vitorpamplona.quartz.nip23LongContent.LongTextNoteEvent
+import kotlinx.collections.immutable.toImmutableList
 
 private const val WORDS_PER_MINUTE = 225
 private val COVER_ASPECT_RATIO = 16f / 9f
@@ -92,7 +93,14 @@ fun LongFormHeader(
         remember(noteEvent) {
             noteEvent.summary()?.ifBlank { null } ?: noteEvent.content.take(200).ifBlank { null }
         }
-    val topics = remember(noteEvent) { noteEvent.topics().distinct().take(3) }
+    val topics =
+        remember(noteEvent) {
+            noteEvent
+                .topics()
+                .distinct()
+                .take(3)
+                .toImmutableList()
+        }
     val readingMinutes = remember(noteEvent) { estimateReadingMinutes(noteEvent.content) }
 
     Column(MaterialTheme.colorScheme.replyModifier) {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/NIP90ContentDiscoveryResponse.kt

@@ -54,7 +54,6 @@ fun RenderNIP90ContentDiscoveryResponse(
         note = note,
         accountViewModel = accountViewModel,
     ) {
-        val modifier = remember(note) { Modifier.fillMaxWidth() }
         val tags =
             remember(note) { note.event?.tags?.toImmutableListOfLists() ?: EmptyTagList }
 
@@ -62,7 +61,7 @@ fun RenderNIP90ContentDiscoveryResponse(
             content = noteEvent.content,
             canPreview = canPreview && !makeItShort,
             quotesLeft = quotesLeft,
-            modifier = modifier,
+            modifier = Modifier.fillMaxWidth(),
             tags = tags,
             backgroundColor = backgroundColor,
             id = note.idHex,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/PeopleList.kt

@@ -81,7 +81,7 @@ fun DisplayPeopleList(
             members.take(3)
         }
 
-    val name by remember { derivedStateOf { "#${noteEvent.titleOrName() ?: noteEvent.dTag()}" } }
+    val name by remember(noteEvent) { derivedStateOf { "#${noteEvent.titleOrName() ?: noteEvent.dTag()}" } }
 
     Text(
         text = name,
@@ -95,7 +95,7 @@ fun DisplayPeopleList(
         textAlign = TextAlign.Center,
     )
 
-    LaunchedEffect(Unit) {
+    LaunchedEffect(noteEvent) {
         accountViewModel.loadUsers(noteEvent.taggedUserIds()) {
             members = it
         }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/PinList.kt

@@ -65,7 +65,7 @@ fun RenderPinListEvent(
 ) {
     val noteEvent = baseNote.event as? PinListEvent ?: return
 
-    val pins by remember { mutableStateOf(noteEvent.pinnedEvents()) }
+    val pins = remember(noteEvent) { noteEvent.pinnedEvents() }
 
     var expanded by remember { mutableStateOf(false) }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/RelayList.kt

@@ -75,12 +75,10 @@ fun DisplayRelaySet(
 ) {
     val noteEvent = baseNote.event as? RelaySetEvent ?: return
 
-    val relays by
+    val relays =
         remember(noteEvent) {
-            mutableStateOf(
-                RelayListCard(
-                    noteEvent.relays().toImmutableList(),
-                ),
+            RelayListCard(
+                noteEvent.relays().toImmutableList(),
             )
         }
 
@@ -89,10 +87,12 @@ fun DisplayRelaySet(
             noteEvent.tags.firstTagValueFor("title", "name") ?: "#${noteEvent.dTag()}"
         }
 
+    val description = remember(noteEvent) { noteEvent.description() }
+
     DisplayRelaySet(
         relays,
         relayListName,
-        noteEvent.description(),
+        description,
         backgroundColor,
         accountViewModel,
         nav,
@@ -108,21 +108,17 @@ fun DisplayNIP65RelayList(
 ) {
     val noteEvent = baseNote.event as? AdvertisedRelayListEvent ?: return
 
-    val writeRelays by
-        remember(baseNote) {
-            mutableStateOf(
-                RelayListCard(
-                    noteEvent.writeRelaysNorm() ?: emptyList(),
-                ),
+    val writeRelays =
+        remember(noteEvent) {
+            RelayListCard(
+                noteEvent.writeRelaysNorm() ?: emptyList(),
             )
         }
 
-    val readRelays by
-        remember(baseNote) {
-            mutableStateOf(
-                RelayListCard(
-                    noteEvent.readRelaysNorm() ?: emptyList(),
-                ),
+    val readRelays =
+        remember(noteEvent) {
+            RelayListCard(
+                noteEvent.readRelaysNorm() ?: emptyList(),
             )
         }
 
@@ -154,12 +150,10 @@ fun DisplayDMRelayList(
 ) {
     val noteEvent = baseNote.event as? ChatMessageRelayListEvent ?: return
 
-    val relays by
-        remember(baseNote) {
-            mutableStateOf(
-                RelayListCard(
-                    noteEvent.relays(),
-                ),
+    val relays =
+        remember(noteEvent) {
+            RelayListCard(
+                noteEvent.relays(),
             )
         }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/Torrent.kt

@@ -153,19 +153,24 @@ fun RenderTorrent(
 ) {
     val noteEvent = note.event as? TorrentEvent ?: return
 
-    val name = (noteEvent.title() ?: TorrentEvent.ALT_DESCRIPTION)
-    val size = " (" + countToHumanReadableBytes(noteEvent.totalSizeBytes()) + ")"
-
-    val description =
-        if (noteEvent.content != name) {
-            noteEvent.content
-        } else {
-            null
+    val title =
+        remember(noteEvent) {
+            val name = noteEvent.title() ?: TorrentEvent.ALT_DESCRIPTION
+            val size = " (" + countToHumanReadableBytes(noteEvent.totalSizeBytes()) + ")"
+            name + size
         }
 
+    val description =
+        remember(noteEvent) {
+            val name = noteEvent.title() ?: TorrentEvent.ALT_DESCRIPTION
+            if (noteEvent.content != name) noteEvent.content else null
+        }
+
+    val files = remember(noteEvent) { noteEvent.files().toImmutableList() }
+
     DisplayFileList(
-        noteEvent.files().toImmutableList(),
-        name + size,
+        files,
+        title,
         description,
         noteEvent::toMagnetLink,
         backgroundColor,