feat(desktop): tabs-first header for Home / Reads, compact Notifications header

Refactored the three feed screen headers so they all match the Messages
pattern — single compact row padded horizontal = 12, vertical = 8, no
oversized titles, no multi-row metadata.

FeedScreen (Home):
- Replaced the `headlineMedium` "Global Feed" / "Following Feed" title
  plus a redundant Global/Following chip row plus a separate relay-count
  meta-line plus a large "New Post" button with:
    [ Following | Global ]   [relays] [refresh] [+ compose]
  The selected tab IS the screen title. Relay count + followed-user
  count surface through a hover tooltip on the relays icon (desktop
  convention; info is preserved without taking a whole row).
- Relays icon click opens the picker when the account can edit, falls
  through to navigate-to-relays otherwise.

ReadsScreen:
- Same treatment: dropped the "Reads" label, lifted Following/Global
  chips to the left, single refresh icon on the right. "N relays
  connected" moved to the refresh button's content description.

commons/FeedHeader (used by NotificationsScreen):
- Dropped the RelayStatusIndicator (icon + count text + refresh button,
  took 3 slots). Now just titleMedium on the left + a single refresh
  IconButton on the right with relay count in its content description,
  matching the Messages "titleMedium + icon buttons" rhythm.
- Internal padding(horizontal = 12, vertical = 8) baked in so callers
  don't need a trailing Spacer.

https://claude.ai/code/session_01NufduPfZvYQVYwLkbCjCUo

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

@@ -20,12 +20,11 @@
  */
 package com.vitorpamplona.amethyst.desktop.ui
 
-import androidx.compose.foundation.clickable
+import androidx.compose.foundation.ExperimentalFoundationApi
+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.ExperimentalLayoutApi
-import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -33,15 +32,14 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.AlertDialog
-import androidx.compose.material3.Button
 import androidx.compose.material3.FilterChip
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
@@ -489,7 +487,6 @@ fun FeedScreen(
         onDispose { subId?.let { coordinator.releaseInteractions(it) } }
     }
 
-    @OptIn(ExperimentalLayoutApi::class)
     Box(modifier = Modifier.fillMaxSize()) {
         Column(modifier = Modifier.fillMaxSize()) {
             // Header with compose button
@@ -629,9 +626,15 @@ fun FeedScreen(
 }
 
 /**
- * Feed header with title, mode selector, relay count, and compose button.
+ * Feed header \u2014 Messages-style single row: Following/Global tabs on the left,
+ * compact icon buttons on the right (relays, refresh, compose). The selected
+ * tab IS the title; no redundant "Global Feed" / "Following Feed" label.
+ *
+ * Relay count and followed-users count are surfaced via a hover tooltip on
+ * the relays icon (desktop convention \u2014 the at-a-glance info is preserved
+ * without stealing header real estate).
  */
-@OptIn(ExperimentalLayoutApi::class)
+@OptIn(ExperimentalFoundationApi::class)
 @Composable
 private fun FeedHeader(
     feedMode: FeedMode,
@@ -644,90 +647,96 @@ private fun FeedHeader(
     onNavigateToRelays: () -> Unit = {},
     onOpenRelayPicker: () -> Unit = {},
 ) {
-    FlowRow(
-        modifier = Modifier.fillMaxWidth().padding(bottom = 16.dp),
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(horizontal = 12.dp, vertical = 8.dp),
         horizontalArrangement = Arrangement.SpaceBetween,
-        verticalArrangement = Arrangement.spacedBy(8.dp),
+        verticalAlignment = Alignment.CenterVertically,
     ) {
-        Column {
-            FlowRow(
-                verticalArrangement = Arrangement.Center,
-                horizontalArrangement = Arrangement.spacedBy(8.dp),
-            ) {
-                Text(
-                    if (feedMode == FeedMode.GLOBAL) "Global Feed" else "Following Feed",
-                    style = MaterialTheme.typography.headlineMedium,
-                    color = MaterialTheme.colorScheme.onBackground,
+        // Tabs \u2014 the selected one is the screen title.
+        Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+            if (account != null) {
+                FilterChip(
+                    selected = feedMode == FeedMode.FOLLOWING,
+                    onClick = { onFeedModeChange(FeedMode.FOLLOWING) },
+                    label = { Text("Following") },
                 )
-
-                if (account != null) {
-                    Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
-                        FilterChip(
-                            selected = feedMode == FeedMode.GLOBAL,
-                            onClick = { onFeedModeChange(FeedMode.GLOBAL) },
-                            label = { Text("Global") },
-                        )
-                        FilterChip(
-                            selected = feedMode == FeedMode.FOLLOWING,
-                            onClick = { onFeedModeChange(FeedMode.FOLLOWING) },
-                            label = { Text("Following") },
-                        )
-                    }
-                }
-            }
-
-            Spacer(Modifier.height(4.dp))
-            Row(verticalAlignment = Alignment.CenterVertically) {
-                Text(
-                    "${feedRelays.size} relays",
-                    style = MaterialTheme.typography.bodyMedium,
-                    color = MaterialTheme.colorScheme.primary,
-                    modifier =
-                        Modifier.clickable { onNavigateToRelays() },
-                )
-                if (feedMode == FeedMode.FOLLOWING) {
-                    Text(
-                        " \u2022 $followedUsersCount followed",
-                        style = MaterialTheme.typography.bodyMedium,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                    )
-                }
-                Spacer(Modifier.width(8.dp))
-                if (account != null && !account.isReadOnly) {
-                    IconButton(
-                        onClick = onOpenRelayPicker,
-                        modifier = Modifier.size(24.dp),
-                    ) {
-                        Icon(
-                            MaterialSymbols.Dns,
-                            contentDescription = "Edit Feed Relays",
-                            tint = MaterialTheme.colorScheme.primary,
-                            modifier = Modifier.size(18.dp),
-                        )
-                    }
-                    Spacer(Modifier.width(4.dp))
-                }
-                IconButton(
-                    onClick = onRefresh,
-                    modifier = Modifier.size(24.dp),
-                ) {
-                    Icon(
-                        MaterialSymbols.Refresh,
-                        contentDescription = "Refresh",
-                        tint = MaterialTheme.colorScheme.primary,
-                        modifier = Modifier.size(18.dp),
-                    )
-                }
             }
+            FilterChip(
+                selected = feedMode == FeedMode.GLOBAL,
+                onClick = { onFeedModeChange(FeedMode.GLOBAL) },
+                label = { Text("Global") },
+            )
         }
 
-        Button(
-            onClick = onCompose,
-            enabled = account != null && !account.isReadOnly,
-        ) {
-            Icon(MaterialSymbols.Add, "New Post", Modifier.size(18.dp))
-            Spacer(Modifier.width(8.dp))
-            Text("New Post")
+        // Actions \u2014 compact icon buttons at the same scale as the Messages header.
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            val relaysTooltip =
+                buildString {
+                    append("${feedRelays.size} relays")
+                    if (feedMode == FeedMode.FOLLOWING) {
+                        append(" \u2022 $followedUsersCount followed")
+                    }
+                }
+            TooltipArea(
+                tooltip = {
+                    Surface(
+                        shape = MaterialTheme.shapes.small,
+                        color = MaterialTheme.colorScheme.surfaceContainerHigh,
+                        tonalElevation = 2.dp,
+                        shadowElevation = 4.dp,
+                    ) {
+                        Text(
+                            relaysTooltip,
+                            modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+                            style = MaterialTheme.typography.bodySmall,
+                        )
+                    }
+                },
+            ) {
+                IconButton(
+                    onClick = {
+                        if (account != null && !account.isReadOnly) {
+                            onOpenRelayPicker()
+                        } else {
+                            onNavigateToRelays()
+                        }
+                    },
+                    modifier = Modifier.size(32.dp),
+                ) {
+                    Icon(
+                        MaterialSymbols.Dns,
+                        contentDescription = relaysTooltip,
+                        tint = MaterialTheme.colorScheme.primary,
+                        modifier = Modifier.size(20.dp),
+                    )
+                }
+            }
+
+            IconButton(
+                onClick = onRefresh,
+                modifier = Modifier.size(32.dp),
+            ) {
+                Icon(
+                    MaterialSymbols.Refresh,
+                    contentDescription = "Refresh",
+                    tint = MaterialTheme.colorScheme.primary,
+                    modifier = Modifier.size(20.dp),
+                )
+            }
+
+            if (account != null && !account.isReadOnly) {
+                IconButton(
+                    onClick = onCompose,
+                    modifier = Modifier.size(32.dp),
+                ) {
+                    Icon(
+                        MaterialSymbols.Add,
+                        contentDescription = "New Post",
+                        tint = MaterialTheme.colorScheme.primary,
+                        modifier = Modifier.size(20.dp),
+                    )
+                }
+            }
         }
     }
 }

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

@@ -245,8 +245,6 @@ fun NotificationsScreen(
             onRefresh = { relayManager.connect() },
         )
 
-        Spacer(Modifier.height(16.dp))
-
         if (connectedRelays.isEmpty()) {
             LoadingState("Connecting to relays...")
         } else if (notifications.isEmpty() && !initialLoadComplete) {

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

@@ -23,8 +23,6 @@ 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.ExperimentalLayoutApi
-import androidx.compose.foundation.layout.FlowRow
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
@@ -32,7 +30,6 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.Card
@@ -290,70 +287,45 @@ fun ReadsScreen(
         }
     }
 
-    @OptIn(ExperimentalLayoutApi::class)
     Column(modifier = Modifier.fillMaxSize()) {
-        // Header — wraps on narrow columns
-        FlowRow(
+        // Header — Messages-style: tabs left, refresh right. The selected tab
+        // (Following / Global) acts as the screen title, so no separate label.
+        Row(
             modifier =
                 Modifier
                     .fillMaxWidth()
                     .padding(horizontal = 12.dp, vertical = 8.dp),
             horizontalArrangement = Arrangement.SpaceBetween,
-            verticalArrangement = Arrangement.spacedBy(8.dp),
+            verticalAlignment = Alignment.CenterVertically,
         ) {
-            Column {
-                FlowRow(
-                    verticalArrangement = Arrangement.Center,
-                    horizontalArrangement = Arrangement.spacedBy(8.dp),
-                ) {
-                    Text(
-                        "Reads",
-                        style = MaterialTheme.typography.titleMedium,
-                        color = MaterialTheme.colorScheme.onBackground,
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                if (account != null) {
+                    FilterChip(
+                        selected = feedMode == FeedMode.FOLLOWING,
+                        onClick = { feedMode = FeedMode.FOLLOWING },
+                        label = { Text("Following") },
                     )
-
-                    // Feed mode selector
-                    if (account != null) {
-                        Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
-                            FilterChip(
-                                selected = feedMode == FeedMode.GLOBAL,
-                                onClick = { feedMode = FeedMode.GLOBAL },
-                                label = { Text("Global") },
-                            )
-                            FilterChip(
-                                selected = feedMode == FeedMode.FOLLOWING,
-                                onClick = { feedMode = FeedMode.FOLLOWING },
-                                label = { Text("Following") },
-                            )
-                        }
-                    }
                 }
+                FilterChip(
+                    selected = feedMode == FeedMode.GLOBAL,
+                    onClick = { feedMode = FeedMode.GLOBAL },
+                    label = { Text("Global") },
+                )
+            }
 
-                Spacer(Modifier.height(4.dp))
-                Row(verticalAlignment = Alignment.CenterVertically) {
-                    Text(
-                        "${connectedRelays.size} relays connected",
-                        style = MaterialTheme.typography.bodyMedium,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                    )
-                    Spacer(Modifier.width(8.dp))
-                    IconButton(
-                        onClick = { relayManager.connect() },
-                        modifier = Modifier.size(24.dp),
-                    ) {
-                        Icon(
-                            MaterialSymbols.Refresh,
-                            contentDescription = "Refresh",
-                            tint = MaterialTheme.colorScheme.primary,
-                            modifier = Modifier.size(18.dp),
-                        )
-                    }
-                }
+            IconButton(
+                onClick = { relayManager.connect() },
+                modifier = Modifier.size(32.dp),
+            ) {
+                Icon(
+                    MaterialSymbols.Refresh,
+                    contentDescription = "Refresh (${connectedRelays.size} relays connected)",
+                    tint = MaterialTheme.colorScheme.primary,
+                    modifier = Modifier.size(20.dp),
+                )
             }
         }
 
-        Spacer(Modifier.height(8.dp))
-
         when {
             connectedRelays.isEmpty() -> {
                 LoadingState("Connecting to relays...")