feat(desktop): 12dp horizontal gutter around feed/list content

Content cards were butting up against the nav rail / window edge.
Added contentPadding = PaddingValues(horizontal = 12.dp) to every
scroll container so items sit inset by the same amount the header
row already uses — a consistent gutter the eye can anchor to.

Applied to: FeedScreen, ReadsScreen, NotificationsScreen,
BookmarksScreen, DraftsScreen, SearchScreen, MyHighlightsScreen,
UserProfileScreen, ThreadScreen, ChessScreen, RelayMetricsTab.
RelayConfigTab (verticalScroll Column) got the same horizontal
padding via its content modifier.

Messages is untouched — its two-pane layout with an internal
VerticalDivider already provides its own visual separation.

https://claude.ai/code/session_01NufduPfZvYQVYwLkbCjCUo

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/chess/ChessScreen.kt

@@ -24,6 +24,7 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.BoxWithConstraints
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
@@ -416,6 +417,7 @@ private fun ChessLobby(
 
     LazyColumn(
         state = listState,
+        contentPadding = PaddingValues(horizontal = 12.dp),
         verticalArrangement = Arrangement.spacedBy(8.dp),
     ) {
         // Active games section (user is participant)

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

@@ -22,6 +22,7 @@ package com.vitorpamplona.amethyst.desktop.ui
 
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -303,6 +304,7 @@ fun BookmarksScreen(
             else -> {
                 LazyColumn(
                     modifier = Modifier.fillMaxSize(),
+                    contentPadding = PaddingValues(horizontal = 12.dp),
                 ) {
                     items(currentEvents, key = { it.id }) { event ->
                         Column(

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

@@ -23,6 +23,7 @@ package com.vitorpamplona.amethyst.desktop.ui
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -96,6 +97,7 @@ fun DraftsScreen(
             )
         } else {
             LazyColumn(
+                contentPadding = PaddingValues(horizontal = 12.dp),
                 verticalArrangement = Arrangement.spacedBy(8.dp),
             ) {
                 items(drafts, key = { it.slug }) { entry ->

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

@@ -25,6 +25,7 @@ import androidx.compose.foundation.TooltipArea
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -546,6 +547,7 @@ fun FeedScreen(
                 is FeedState.Loaded -> {
                     val loadedState by state.feed.collectAsState()
                     LazyColumn(
+                        contentPadding = PaddingValues(horizontal = 12.dp),
                         verticalArrangement = Arrangement.spacedBy(8.dp),
                     ) {
                         items(loadedState.list, key = { it.idHex }) { note ->

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

@@ -22,6 +22,7 @@ package com.vitorpamplona.amethyst.desktop.ui
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -256,6 +257,7 @@ fun NotificationsScreen(
             )
         } else {
             LazyColumn(
+                contentPadding = PaddingValues(horizontal = 12.dp),
                 verticalArrangement = Arrangement.spacedBy(8.dp),
             ) {
                 items(notifications.distinctBy { it.event.id }, key = { it.event.id }) { notification ->

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

@@ -23,6 +23,7 @@ package com.vitorpamplona.amethyst.desktop.ui
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -359,6 +360,7 @@ fun ReadsScreen(
 
             else -> {
                 LazyColumn(
+                    contentPadding = PaddingValues(horizontal = 12.dp),
                     verticalArrangement = Arrangement.spacedBy(12.dp),
                 ) {
                     items(events, key = { it.id }) { event ->

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

@@ -28,6 +28,7 @@ import androidx.compose.animation.shrinkVertically
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -523,6 +524,7 @@ private fun SearchEmptyState(
 ) {
     LazyColumn(
         modifier = Modifier.fillMaxWidth(),
+        contentPadding = PaddingValues(horizontal = 12.dp),
         verticalArrangement = Arrangement.spacedBy(4.dp),
     ) {
         // Saved searches

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

@@ -24,6 +24,7 @@ import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -239,6 +240,7 @@ fun ThreadScreen(
 
                 else -> {
                     LazyColumn(
+                        contentPadding = PaddingValues(horizontal = 12.dp),
                         verticalArrangement = Arrangement.spacedBy(0.dp),
                     ) {
                         // Root note

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

@@ -27,6 +27,7 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -441,6 +442,7 @@ fun UserProfileScreen(
         } else {
             LazyColumn(
                 state = listState,
+                contentPadding = PaddingValues(horizontal = 12.dp),
                 verticalArrangement = Arrangement.spacedBy(8.dp),
                 modifier = Modifier.fillMaxSize(),
             ) {

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

@@ -23,6 +23,7 @@ package com.vitorpamplona.amethyst.desktop.ui.highlights
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -88,6 +89,7 @@ fun MyHighlightsScreen(
             )
         } else {
             LazyColumn(
+                contentPadding = PaddingValues(horizontal = 12.dp),
                 verticalArrangement = Arrangement.spacedBy(8.dp),
             ) {
                 allHighlights.forEach { (addressTag, highlights) ->

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

@@ -73,7 +73,7 @@ fun RelayConfigTab(
             modifier
                 .fillMaxSize()
                 .verticalScroll(rememberScrollState())
-                .padding(top = 8.dp),
+                .padding(horizontal = 12.dp, vertical = 8.dp),
     ) {
         // 1. Connected Relays (collapsed by default to show other sections)
         CollapsibleSection(

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

@@ -22,6 +22,7 @@ package com.vitorpamplona.amethyst.desktop.ui.relay
 
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -92,6 +93,7 @@ fun RelayMetricsTab(
 
         LazyColumn(
             modifier = Modifier.fillMaxSize(),
+            contentPadding = PaddingValues(horizontal = 12.dp),
             verticalArrangement = Arrangement.spacedBy(8.dp),
         ) {
             items(statuses, key = { it.url.url }) { status ->