fix: Add proper empty states with EOSE tracking

- NotificationsScreen: Show "No notifications yet" after EOSE instead of infinite loading
- FeedScreen: Show "No notes found" after EOSE for both Global and Following feeds
- ThreadScreen: Show "Note not found" if root note missing after EOSE, "No replies yet" for empty threads

Uses existing EmptyState component from commons. Tracks EOSE (End of Stored Events) from relays to distinguish between "still loading" and "no data".

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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

@@ -59,6 +59,7 @@ import com.vitorpamplona.amethyst.commons.subscriptions.createContactListSubscri
 import com.vitorpamplona.amethyst.commons.subscriptions.createFollowingFeedSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.createGlobalFeedSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.rememberSubscription
+import com.vitorpamplona.amethyst.commons.ui.components.EmptyState
 import com.vitorpamplona.amethyst.commons.ui.components.LoadingState
 import com.vitorpamplona.amethyst.commons.ui.note.NoteCard
 import com.vitorpamplona.amethyst.commons.util.toNoteDisplayData
@@ -127,6 +128,10 @@ fun FeedScreen(
     var feedMode by remember { mutableStateOf(FeedMode.GLOBAL) }
     var followedUsers by remember { mutableStateOf<Set<String>>(emptySet()) }
 
+    // Track EOSE to know when initial load is complete
+    var eoseReceivedCount by remember { mutableStateOf(0) }
+    val initialLoadComplete = eoseReceivedCount > 0
+
     // Load followed users for Following feed mode
     rememberSubscription(relayStatuses, account, feedMode, relayManager = relayManager) {
         val configuredRelays = relayStatuses.keys
@@ -145,9 +150,10 @@ fun FeedScreen(
         }
     }
 
-    // Clear events when feed mode changes
+    // Clear events and reset EOSE when feed mode changes
     remember(feedMode) {
         eventState.clear()
+        eoseReceivedCount = 0
     }
 
     // Subscribe to feed based on mode
@@ -164,6 +170,9 @@ fun FeedScreen(
                     onEvent = { event, _, _, _ ->
                         eventState.addItem(event)
                     },
+                    onEose = { _, _ ->
+                        eoseReceivedCount++
+                    },
                 )
             }
             FeedMode.FOLLOWING -> {
@@ -174,6 +183,9 @@ fun FeedScreen(
                         onEvent = { event, _, _, _ ->
                             eventState.addItem(event)
                         },
+                        onEose = { _, _ ->
+                            eoseReceivedCount++
+                        },
                     )
                 } else {
                     null
@@ -263,13 +275,23 @@ fun FeedScreen(
             LoadingState("Connecting to relays...")
         } else if (feedMode == FeedMode.FOLLOWING && followedUsers.isEmpty()) {
             LoadingState("Loading followed users...")
-        } else if (events.isEmpty()) {
-            LoadingState(
-                if (feedMode == FeedMode.FOLLOWING) {
-                    "No notes from followed users yet"
-                } else {
-                    "Loading notes..."
-                },
+        } else if (events.isEmpty() && !initialLoadComplete) {
+            LoadingState("Loading notes...")
+        } else if (events.isEmpty() && initialLoadComplete) {
+            EmptyState(
+                title =
+                    if (feedMode == FeedMode.FOLLOWING) {
+                        "No notes from followed users"
+                    } else {
+                        "No notes found"
+                    },
+                description =
+                    if (feedMode == FeedMode.FOLLOWING) {
+                        "Notes from people you follow will appear here"
+                    } else {
+                        "Notes from the network will appear here"
+                    },
+                onRefresh = { relayManager.connect() },
             )
         } else {
             LazyColumn(

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

@@ -41,8 +41,10 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
@@ -53,6 +55,7 @@ import com.vitorpamplona.amethyst.commons.icons.Zap
 import com.vitorpamplona.amethyst.commons.state.EventCollectionState
 import com.vitorpamplona.amethyst.commons.subscriptions.createNotificationsSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.rememberSubscription
+import com.vitorpamplona.amethyst.commons.ui.components.EmptyState
 import com.vitorpamplona.amethyst.commons.ui.components.LoadingState
 import com.vitorpamplona.amethyst.commons.ui.feed.FeedHeader
 import com.vitorpamplona.amethyst.commons.util.toTimeAgo
@@ -120,6 +123,10 @@ fun NotificationsScreen(
         }
     val notifications by notificationState.items.collectAsState()
 
+    // Track EOSE to know when initial load is complete
+    var eoseReceivedCount by remember { mutableStateOf(0) }
+    val initialLoadComplete = eoseReceivedCount > 0
+
     // Subscribe to notifications
     rememberSubscription(relayStatuses, account.pubKeyHex, relayManager = relayManager) {
         val configuredRelays = relayStatuses.keys
@@ -168,6 +175,9 @@ fun NotificationsScreen(
 
                     notificationState.addItem(notification)
                 },
+                onEose = { _, _ ->
+                    eoseReceivedCount++
+                },
             )
         } else {
             null
@@ -185,8 +195,14 @@ fun NotificationsScreen(
 
         if (connectedRelays.isEmpty()) {
             LoadingState("Connecting to relays...")
-        } else if (notifications.isEmpty()) {
+        } else if (notifications.isEmpty() && !initialLoadComplete) {
             LoadingState("Loading notifications...")
+        } else if (notifications.isEmpty() && initialLoadComplete) {
+            EmptyState(
+                title = "No notifications yet",
+                description = "When someone interacts with your posts, you'll see it here",
+                onRefresh = { relayManager.connect() },
+            )
         } else {
             LazyColumn(
                 verticalArrangement = Arrangement.spacedBy(8.dp),

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

@@ -55,6 +55,7 @@ import com.vitorpamplona.amethyst.commons.state.EventCollectionState
 import com.vitorpamplona.amethyst.commons.subscriptions.createNoteSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.createThreadRepliesSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.rememberSubscription
+import com.vitorpamplona.amethyst.commons.ui.components.EmptyState
 import com.vitorpamplona.amethyst.commons.ui.components.LoadingState
 import com.vitorpamplona.amethyst.commons.ui.note.NoteCard
 import com.vitorpamplona.amethyst.commons.ui.thread.drawReplyLevel
@@ -98,6 +99,10 @@ fun ThreadScreen(
     // Cache for calculating reply levels
     val levelCache = remember(noteId) { mutableMapOf<String, Int>() }
 
+    // Track EOSE to know when initial load is complete
+    var rootNoteEoseReceived by remember(noteId) { mutableStateOf(false) }
+    var repliesEoseReceived by remember(noteId) { mutableStateOf(false) }
+
     // Subscribe to the root note
     rememberSubscription(relayStatuses, noteId, relayManager = relayManager) {
         val configuredRelays = relayStatuses.keys
@@ -111,6 +116,9 @@ fun ThreadScreen(
                         levelCache[event.id] = 0
                     }
                 },
+                onEose = { _, _ ->
+                    rootNoteEoseReceived = true
+                },
             )
         } else {
             null
@@ -127,6 +135,9 @@ fun ThreadScreen(
                 onEvent = { event, _, _, _ ->
                     replyEventState.addItem(event)
                 },
+                onEose = { _, _ ->
+                    repliesEoseReceived = true
+                },
             )
         } else {
             null
@@ -172,8 +183,15 @@ fun ThreadScreen(
 
         if (connectedRelays.isEmpty()) {
             LoadingState("Connecting to relays...")
-        } else if (rootNote == null) {
+        } else if (rootNote == null && !rootNoteEoseReceived) {
             LoadingState("Loading thread...")
+        } else if (rootNote == null && rootNoteEoseReceived) {
+            EmptyState(
+                title = "Note not found",
+                description = "This note may have been deleted or is not available from connected relays",
+                onRefresh = onBack,
+                refreshLabel = "Go back",
+            )
         } else {
             LazyColumn(
                 verticalArrangement = Arrangement.spacedBy(0.dp),
@@ -241,7 +259,7 @@ fun ThreadScreen(
                 }
 
                 // Empty state for no replies
-                if (replyEvents.isEmpty()) {
+                if (replyEvents.isEmpty() && repliesEoseReceived) {
                     item {
                         Spacer(Modifier.height(32.dp))
                         Text(
@@ -251,6 +269,16 @@ fun ThreadScreen(
                             modifier = Modifier.padding(16.dp),
                         )
                     }
+                } else if (replyEvents.isEmpty() && !repliesEoseReceived) {
+                    item {
+                        Spacer(Modifier.height(32.dp))
+                        Text(
+                            "Loading replies...",
+                            style = MaterialTheme.typography.bodyMedium,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            modifier = Modifier.padding(16.dp),
+                        )
+                    }
                 }
             }
         }