zap updates

amethyst/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -25,6 +25,7 @@ import androidx.compose.runtime.Stable
 import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.commons.model.cache.ICacheProvider
 import com.vitorpamplona.amethyst.commons.model.cache.IChannel
+import com.vitorpamplona.amethyst.commons.services.nwc.NwcPaymentTracker
 import com.vitorpamplona.amethyst.isDebug
 import com.vitorpamplona.amethyst.model.emphChat.EphemeralChatChannel
 import com.vitorpamplona.amethyst.model.nip28PublicChats.PublicChatChannel
@@ -225,7 +226,7 @@ object LocalCache : ILocalCache, ICacheProvider {
     val liveChatChannels = LargeCache<Address, LiveActivitiesChannel>()
     val ephemeralChannels = LargeCache<RoomId, EphemeralChatChannel>()
 
-    val awaitingPaymentRequests = ConcurrentHashMap<HexKey, Pair<Note?, suspend (LnZapPaymentResponseEvent) -> Unit>>(10)
+    val paymentTracker = NwcPaymentTracker()
 
     val relayHints = HintIndexer()
 
@@ -308,7 +309,7 @@ object LocalCache : ILocalCache, ICacheProvider {
 
     fun load(keys: Set<String>): Set<User> = keys.mapNotNullTo(mutableSetOf(), ::checkGetOrCreateUser)
 
-    fun getOrCreateUser(key: HexKey): User {
+    override fun getOrCreateUser(key: HexKey): User {
         require(isValidHex(key = key)) { "$key is not a valid hex" }
 
         return users.getOrCreate(key) {
@@ -1976,7 +1977,7 @@ object LocalCache : ILocalCache, ICacheProvider {
 
             zappedNote?.addZapPayment(note, null)
 
-            awaitingPaymentRequests.put(event.id, Pair(zappedNote, onResponse))
+            paymentTracker.registerRequest(event.id, zappedNote, onResponse)
 
             refreshNewNoteObservers(note)
 
@@ -1992,9 +1993,10 @@ object LocalCache : ILocalCache, ICacheProvider {
         wasVerified: Boolean,
     ): Boolean {
         val requestId = event.requestId()
-        val pair = awaitingPaymentRequests[requestId] ?: return false
+        val pending = paymentTracker.onResponseReceived(requestId) ?: return false
 
-        val (zappedNote, responseCallback) = pair
+        val zappedNote = pending.zappedNote
+        val responseCallback = pending.onResponse
 
         val requestNote = requestId?.let { checkGetOrCreateNote(requestId) }
 

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/icons/Bookmark.kt

@@ -0,0 +1,121 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.icons
+
+import androidx.compose.foundation.Image
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.PathFillType.Companion.NonZero
+import androidx.compose.ui.graphics.SolidColor
+import androidx.compose.ui.graphics.StrokeCap.Companion.Butt
+import androidx.compose.ui.graphics.StrokeJoin.Companion.Miter
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.graphics.vector.path
+import androidx.compose.ui.unit.dp
+import org.jetbrains.compose.ui.tooling.preview.Preview
+
+@Preview
+@Composable
+private fun VectorPreview() {
+    Image(Bookmark, null)
+}
+
+@Preview
+@Composable
+private fun FilledPreview() {
+    Image(BookmarkFilled, null)
+}
+
+private var bookmark: ImageVector? = null
+private var bookmarkFilled: ImageVector? = null
+
+val Bookmark: ImageVector
+    get() =
+        bookmark ?: ImageVector
+            .Builder(
+                name = "Bookmark",
+                defaultWidth = 24.0.dp,
+                defaultHeight = 24.0.dp,
+                viewportWidth = 24.0f,
+                viewportHeight = 24.0f,
+            ).apply {
+                path(
+                    fill = SolidColor(Color(0xFF000000)),
+                    stroke = null,
+                    strokeLineWidth = 0.0f,
+                    strokeLineCap = Butt,
+                    strokeLineJoin = Miter,
+                    strokeLineMiter = 4.0f,
+                    pathFillType = NonZero,
+                ) {
+                    // Material bookmark outline
+                    moveTo(17.0f, 3.0f)
+                    horizontalLineTo(7.0f)
+                    curveToRelative(-1.1f, 0.0f, -2.0f, 0.9f, -2.0f, 2.0f)
+                    verticalLineToRelative(16.0f)
+                    lineToRelative(7.0f, -3.0f)
+                    lineToRelative(7.0f, 3.0f)
+                    verticalLineTo(5.0f)
+                    curveToRelative(0.0f, -1.1f, -0.9f, -2.0f, -2.0f, -2.0f)
+                    close()
+                    moveTo(17.0f, 18.0f)
+                    lineToRelative(-5.0f, -2.18f)
+                    lineTo(7.0f, 18.0f)
+                    verticalLineTo(5.0f)
+                    horizontalLineToRelative(10.0f)
+                    verticalLineToRelative(13.0f)
+                    close()
+                }
+            }.build()
+            .also { bookmark = it }
+
+val BookmarkFilled: ImageVector
+    get() =
+        bookmarkFilled ?: ImageVector
+            .Builder(
+                name = "BookmarkFilled",
+                defaultWidth = 24.0.dp,
+                defaultHeight = 24.0.dp,
+                viewportWidth = 24.0f,
+                viewportHeight = 24.0f,
+            ).apply {
+                path(
+                    fill = SolidColor(Color(0xFF000000)),
+                    stroke = null,
+                    strokeLineWidth = 0.0f,
+                    strokeLineCap = Butt,
+                    strokeLineJoin = Miter,
+                    strokeLineMiter = 4.0f,
+                    pathFillType = NonZero,
+                ) {
+                    // Material bookmark filled
+                    moveTo(17.0f, 3.0f)
+                    horizontalLineTo(7.0f)
+                    curveToRelative(-1.1f, 0.0f, -2.0f, 0.9f, -2.0f, 2.0f)
+                    verticalLineToRelative(16.0f)
+                    lineToRelative(7.0f, -3.0f)
+                    lineToRelative(7.0f, 3.0f)
+                    verticalLineTo(5.0f)
+                    curveToRelative(0.0f, -1.1f, -0.9f, -2.0f, -2.0f, -2.0f)
+                    close()
+                }
+            }.build()
+            .also { bookmarkFilled = it }

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/cache/ICacheProvider.kt

@@ -96,6 +96,28 @@ interface ICacheProvider {
      * @return true if the event has been deleted, false otherwise
      */
     fun hasBeenDeleted(event: Any): Boolean
+
+    /**
+     * Finds users whose name, displayName, nip05, or lud16 starts with the given prefix.
+     * Used by search functionality to find users by name.
+     *
+     * @param prefix The search prefix to match against user names
+     * @param limit Maximum number of results to return
+     * @return List of Users matching the prefix
+     */
+    fun findUsersStartingWith(
+        prefix: String,
+        limit: Int = 50,
+    ): List<Any> = emptyList()
+
+    /**
+     * Gets or creates a User by public key hex.
+     * Used when processing events that reference users.
+     *
+     * @param pubkey The user's public key in hex format
+     * @return The User (existing or newly created)
+     */
+    fun getOrCreateUser(pubkey: HexKey): Any?
 }
 
 /**

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/search/SearchParser.kt

@@ -0,0 +1,127 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.search
+
+import com.vitorpamplona.quartz.nip19Bech32.Nip19Parser
+import com.vitorpamplona.quartz.nip19Bech32.entities.NAddress
+import com.vitorpamplona.quartz.nip19Bech32.entities.NEvent
+import com.vitorpamplona.quartz.nip19Bech32.entities.NNote
+import com.vitorpamplona.quartz.nip19Bech32.entities.NProfile
+import com.vitorpamplona.quartz.nip19Bech32.entities.NPub
+import com.vitorpamplona.quartz.nip19Bech32.entities.NSec
+import com.vitorpamplona.quartz.utils.Hex
+
+/**
+ * Parses search input and returns matching results.
+ * Supports: npub, nprofile, nsec (extracts pubkey), note, nevent, naddr, hex keys, hashtags
+ *
+ * Shared between Android and Desktop for consistent Bech32 parsing.
+ */
+fun parseSearchInput(input: String): List<SearchResult> {
+    if (input.isBlank()) return emptyList()
+
+    val trimmed = input.trim()
+    val results = mutableListOf<SearchResult>()
+
+    // Check for hashtag
+    if (trimmed.startsWith("#") && trimmed.length > 1) {
+        results.add(SearchResult.HashtagResult(trimmed.substring(1)))
+        return results
+    }
+
+    // Try to parse as Bech32 (npub, nevent, naddr, etc.)
+    val parsed = Nip19Parser.uriToRoute(trimmed)?.entity
+    if (parsed != null) {
+        when (parsed) {
+            is NPub -> {
+                results.add(
+                    SearchResult.UserResult(
+                        pubKeyHex = parsed.hex,
+                        displayId = trimmed.take(20) + "...",
+                    ),
+                )
+            }
+            is NProfile -> {
+                results.add(
+                    SearchResult.UserResult(
+                        pubKeyHex = parsed.hex,
+                        displayId = trimmed.take(20) + "...",
+                    ),
+                )
+            }
+            is NSec -> {
+                results.add(
+                    SearchResult.UserResult(
+                        pubKeyHex = parsed.toPubKeyHex(),
+                        displayId = "User from nsec",
+                    ),
+                )
+            }
+            is NNote -> {
+                results.add(
+                    SearchResult.NoteResult(
+                        noteIdHex = parsed.hex,
+                        displayId = trimmed.take(20) + "...",
+                    ),
+                )
+            }
+            is NEvent -> {
+                results.add(
+                    SearchResult.NoteResult(
+                        noteIdHex = parsed.hex,
+                        displayId = trimmed.take(20) + "...",
+                    ),
+                )
+            }
+            is NAddress -> {
+                results.add(
+                    SearchResult.AddressResult(
+                        kind = parsed.kind,
+                        pubKeyHex = parsed.author,
+                        dTag = parsed.dTag,
+                        displayId = trimmed.take(20) + "...",
+                    ),
+                )
+            }
+            else -> { }
+        }
+        return results
+    }
+
+    // Try to parse as hex (64-char pubkey or event id)
+    if (trimmed.length == 64 && Hex.isHex(trimmed)) {
+        results.add(
+            SearchResult.UserResult(
+                pubKeyHex = trimmed,
+                displayId = trimmed.take(16) + "..." + trimmed.takeLast(8),
+            ),
+        )
+        results.add(
+            SearchResult.NoteResult(
+                noteIdHex = trimmed,
+                displayId = trimmed.take(16) + "..." + trimmed.takeLast(8),
+            ),
+        )
+        return results
+    }
+
+    return results
+}

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/search/SearchResult.kt

@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.search
+
+import com.vitorpamplona.amethyst.commons.model.User
+
+/**
+ * Represents a parsed search result from Bech32/hex input.
+ * Shared between Android and Desktop for consistent search behavior.
+ */
+sealed class SearchResult {
+    /**
+     * Direct user lookup from npub, nprofile, nsec, or hex pubkey.
+     */
+    data class UserResult(
+        val pubKeyHex: String,
+        val displayId: String,
+    ) : SearchResult()
+
+    /**
+     * User from local cache with full metadata.
+     */
+    data class CachedUserResult(
+        val user: User,
+    ) : SearchResult()
+
+    /**
+     * Note lookup from note1 or nevent.
+     */
+    data class NoteResult(
+        val noteIdHex: String,
+        val displayId: String,
+    ) : SearchResult()
+
+    /**
+     * Addressable event lookup from naddr.
+     */
+    data class AddressResult(
+        val kind: Int,
+        val pubKeyHex: String,
+        val dTag: String,
+        val displayId: String,
+    ) : SearchResult()
+
+    /**
+     * Hashtag search.
+     */
+    data class HashtagResult(
+        val hashtag: String,
+    ) : SearchResult()
+}

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/state/EventCollectionState.kt

@@ -90,6 +90,7 @@ class EventCollectionState<T : Any>(
             mutex.withLock {
                 val itemId = getId(item)
                 if (itemId !in seenIds) {
+                    seenIds.add(itemId)
                     pendingItems.add(item)
                     scheduleBatchUpdate()
                 }
@@ -108,6 +109,7 @@ class EventCollectionState<T : Any>(
             mutex.withLock {
                 val newItems = items.filter { getId(it) !in seenIds }
                 if (newItems.isNotEmpty()) {
+                    newItems.forEach { seenIds.add(getId(it)) }
                     pendingItems.addAll(newItems)
                     scheduleBatchUpdate()
                 }
@@ -191,8 +193,7 @@ class EventCollectionState<T : Any>(
         mutex.withLock {
             if (pendingItems.isEmpty()) return
 
-            // Add pending IDs to seenIds
-            pendingItems.forEach { seenIds.add(getId(it)) }
+            // seenIds already updated in addItem/addItems
 
             // Merge with existing items
             val merged = _items.value + pendingItems

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/ui/components/UserAvatar.kt

@@ -21,6 +21,7 @@
 package com.vitorpamplona.amethyst.commons.ui.components
 
 import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Face
@@ -62,8 +63,10 @@ fun UserAvatar(
     loadRobohash: Boolean = true,
 ) {
     val avatarModifier =
-        remember(size) {
-            modifier.clip(shape = CircleShape)
+        remember(size, modifier) {
+            modifier
+                .size(size)
+                .clip(shape = CircleShape)
         }
 
     if (pictureUrl != null && loadProfilePicture) {

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/ui/components/UserSearchCard.kt

@@ -0,0 +1,105 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.ui.components
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowForward
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.commons.model.User
+
+/**
+ * A card displaying user search result with avatar, name, and nip05/pubkey.
+ * Shared between Android and Desktop search screens.
+ */
+@Composable
+fun UserSearchCard(
+    user: User,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Card(
+        modifier =
+            modifier
+                .fillMaxWidth()
+                .clickable(onClick = onClick),
+        colors =
+            CardDefaults.cardColors(
+                containerColor = MaterialTheme.colorScheme.surfaceVariant,
+            ),
+    ) {
+        Row(
+            modifier = Modifier.padding(12.dp).fillMaxWidth(),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            UserAvatar(
+                userHex = user.pubkeyHex,
+                pictureUrl = user.profilePicture(),
+                size = 40.dp,
+                contentDescription = "Profile picture",
+            )
+
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    user.toBestDisplayName(),
+                    style = MaterialTheme.typography.titleSmall,
+                    color = MaterialTheme.colorScheme.onSurface,
+                )
+                val nip05 = user.nip05()
+                if (nip05 != null) {
+                    Text(
+                        nip05,
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.primary,
+                    )
+                } else {
+                    Text(
+                        user.pubkeyDisplayHex(),
+                        style = MaterialTheme.typography.bodySmall,
+                        fontFamily = FontFamily.Monospace,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+
+            Icon(
+                Icons.AutoMirrored.Filled.ArrowForward,
+                contentDescription = "Navigate",
+                tint = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+    }
+}

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/viewmodels/SearchBarState.kt

@@ -0,0 +1,130 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.viewmodels
+
+import com.vitorpamplona.amethyst.commons.model.User
+import com.vitorpamplona.amethyst.commons.model.cache.ICacheProvider
+import com.vitorpamplona.amethyst.commons.search.SearchResult
+import com.vitorpamplona.amethyst.commons.search.parseSearchInput
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+
+/**
+ * State holder for search bar functionality.
+ * Shared between Android and Desktop search screens.
+ *
+ * Handles:
+ * - Search text input
+ * - Bech32/hex parsing
+ * - Local cache search (with debounce)
+ * - Relay search results aggregation
+ *
+ * Platform-specific concerns (relay subscriptions, navigation) remain in the UI layer.
+ */
+class SearchBarState(
+    private val cache: ICacheProvider,
+    private val scope: CoroutineScope,
+    private val debounceMs: Long = 300L,
+) {
+    private val _searchText = MutableStateFlow("")
+    val searchText: StateFlow<String> = _searchText.asStateFlow()
+
+    private val _bech32Results = MutableStateFlow<List<SearchResult>>(emptyList())
+    val bech32Results: StateFlow<List<SearchResult>> = _bech32Results.asStateFlow()
+
+    private val _cachedUserResults = MutableStateFlow<List<User>>(emptyList())
+    val cachedUserResults: StateFlow<List<User>> = _cachedUserResults.asStateFlow()
+
+    private val _relaySearchResults = MutableStateFlow<List<User>>(emptyList())
+    val relaySearchResults: StateFlow<List<User>> = _relaySearchResults.asStateFlow()
+
+    private val _isSearchingRelays = MutableStateFlow(false)
+    val isSearchingRelays: StateFlow<Boolean> = _isSearchingRelays.asStateFlow()
+
+    val hasResults: Boolean
+        get() =
+            _bech32Results.value.isNotEmpty() ||
+                _cachedUserResults.value.isNotEmpty() ||
+                _relaySearchResults.value.isNotEmpty()
+
+    val shouldSearchRelays: Boolean
+        get() =
+            _searchText.value.length >= 2 &&
+                _bech32Results.value.isEmpty() &&
+                _cachedUserResults.value.size < 5
+
+    init {
+        setupSearchTextObserver()
+    }
+
+    @OptIn(FlowPreview::class)
+    private fun setupSearchTextObserver() {
+        // Debounced cache search
+        _searchText
+            .debounce(debounceMs)
+            .onEach { query ->
+                if (query.length >= 2 && _bech32Results.value.isEmpty()) {
+                    @Suppress("UNCHECKED_CAST")
+                    _cachedUserResults.value = cache.findUsersStartingWith(query, 20) as List<User>
+                } else {
+                    _cachedUserResults.value = emptyList()
+                }
+            }.launchIn(scope)
+    }
+
+    fun updateSearchText(text: String) {
+        _searchText.value = text
+        _relaySearchResults.value = emptyList()
+        _isSearchingRelays.value = false
+
+        // Parse Bech32/hex immediately (no debounce)
+        _bech32Results.value = parseSearchInput(text)
+
+        // Clear cached results if query too short or is bech32
+        if (text.length < 2 || _bech32Results.value.isNotEmpty()) {
+            _cachedUserResults.value = emptyList()
+        }
+    }
+
+    fun clearSearch() {
+        updateSearchText("")
+    }
+
+    fun startRelaySearch() {
+        _isSearchingRelays.value = true
+    }
+
+    fun endRelaySearch() {
+        _isSearchingRelays.value = false
+    }
+
+    fun addRelaySearchResult(user: User) {
+        if (!_relaySearchResults.value.any { it.pubkeyHex == user.pubkeyHex }) {
+            _relaySearchResults.value = _relaySearchResults.value + user
+        }
+    }
+}

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/account/AccountManager.kt

@@ -32,6 +32,7 @@ import com.vitorpamplona.quartz.nip19Bech32.decodePrivateKeyAsHexOrNull
 import com.vitorpamplona.quartz.nip19Bech32.decodePublicKeyAsHexOrNull
 import com.vitorpamplona.quartz.nip19Bech32.toNpub
 import com.vitorpamplona.quartz.nip19Bech32.toNsec
+import com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
@@ -68,6 +69,9 @@ class AccountManager private constructor(
     private val _accountState = MutableStateFlow<AccountState>(AccountState.LoggedOut)
     val accountState: StateFlow<AccountState> = _accountState.asStateFlow()
 
+    private val _nwcConnection = MutableStateFlow<Nip47WalletConnect.Nip47URINorm?>(null)
+    val nwcConnection: StateFlow<Nip47WalletConnect.Nip47URINorm?> = _nwcConnection.asStateFlow()
+
     /**
      * Loads the last saved account from secure storage.
      * Call on app startup.
@@ -205,6 +209,47 @@ class AccountManager private constructor(
 
     fun currentAccount(): AccountState.LoggedIn? = _accountState.value as? AccountState.LoggedIn
 
+    // NWC (Nostr Wallet Connect) methods
+    fun hasNwcSetup(): Boolean = _nwcConnection.value != null
+
+    fun setNwcConnection(uri: String): Result<Nip47WalletConnect.Nip47URINorm> =
+        try {
+            val parsed = Nip47WalletConnect.parse(uri)
+            _nwcConnection.value = parsed
+            saveNwcUri(uri)
+            Result.success(parsed)
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+
+    fun clearNwcConnection() {
+        _nwcConnection.value = null
+        getNwcFile().delete()
+    }
+
+    fun loadNwcConnection() {
+        val uri = getNwcFile().takeIf { it.exists() }?.readText()?.trim()
+        if (!uri.isNullOrEmpty()) {
+            try {
+                _nwcConnection.value = Nip47WalletConnect.parse(uri)
+            } catch (e: Exception) {
+                // Invalid stored URI, clear it
+                getNwcFile().delete()
+            }
+        }
+    }
+
+    private fun saveNwcUri(uri: String) {
+        val file = getNwcFile()
+        file.parentFile?.mkdirs()
+        file.writeText(uri)
+    }
+
+    private fun getNwcFile(): java.io.File {
+        val homeDir = System.getProperty("user.home")
+        return java.io.File(homeDir, ".amethyst/nwc_connection.txt")
+    }
+
     // Simple file-based storage for last npub (non-sensitive data)
     private fun getLastNpub(): String? {
         val file = getPrefsFile()

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/model/nip51Bookmarks/BookmarkAction.kt

@@ -0,0 +1,149 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.model.nip51Bookmarks
+
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
+import com.vitorpamplona.quartz.nip51Lists.bookmarkList.BookmarkListEvent
+import com.vitorpamplona.quartz.nip51Lists.bookmarkList.tags.EventBookmark
+
+/**
+ * Handles NIP-51 bookmark operations.
+ * Shared between Android and Desktop.
+ */
+object BookmarkAction {
+    /**
+     * Creates a new bookmark list with a single event bookmarked.
+     */
+    suspend fun createWithBookmark(
+        eventId: HexKey,
+        relayHint: NormalizedRelayUrl? = null,
+        isPrivate: Boolean = false,
+        signer: NostrSigner,
+    ): BookmarkListEvent {
+        val bookmark = EventBookmark(eventId, relayHint)
+        return BookmarkListEvent.create(
+            bookmarkIdTag = bookmark,
+            isPrivate = isPrivate,
+            signer = signer,
+        )
+    }
+
+    /**
+     * Adds an event to an existing bookmark list.
+     */
+    suspend fun addBookmark(
+        existingList: BookmarkListEvent,
+        eventId: HexKey,
+        relayHint: NormalizedRelayUrl? = null,
+        isPrivate: Boolean = false,
+        signer: NostrSigner,
+    ): BookmarkListEvent {
+        val bookmark = EventBookmark(eventId, relayHint)
+        return BookmarkListEvent.add(
+            earlierVersion = existingList,
+            bookmarkIdTag = bookmark,
+            isPrivate = isPrivate,
+            signer = signer,
+        )
+    }
+
+    /**
+     * Removes an event from a bookmark list.
+     * Checks both public and private bookmarks.
+     */
+    suspend fun removeBookmark(
+        existingList: BookmarkListEvent,
+        eventId: HexKey,
+        signer: NostrSigner,
+    ): BookmarkListEvent {
+        val bookmark = EventBookmark(eventId)
+        return BookmarkListEvent.remove(
+            earlierVersion = existingList,
+            bookmarkIdTag = bookmark,
+            signer = signer,
+        )
+    }
+
+    /**
+     * Removes an event from a bookmark list (public or private specifically).
+     */
+    suspend fun removeBookmark(
+        existingList: BookmarkListEvent,
+        eventId: HexKey,
+        isPrivate: Boolean,
+        signer: NostrSigner,
+    ): BookmarkListEvent {
+        val bookmark = EventBookmark(eventId)
+        return BookmarkListEvent.remove(
+            earlierVersion = existingList,
+            bookmarkIdTag = bookmark,
+            isPrivate = isPrivate,
+            signer = signer,
+        )
+    }
+
+    /**
+     * Checks if an event ID is in the public bookmarks.
+     */
+    fun isInPublicBookmarks(
+        bookmarkList: BookmarkListEvent?,
+        eventId: HexKey,
+    ): Boolean {
+        if (bookmarkList == null) return false
+        return bookmarkList.publicBookmarks().any {
+            it is EventBookmark && it.eventId == eventId
+        }
+    }
+
+    /**
+     * Checks if an event ID is in the private bookmarks.
+     * Requires decryption via signer.
+     */
+    suspend fun isInPrivateBookmarks(
+        bookmarkList: BookmarkListEvent?,
+        eventId: HexKey,
+        signer: NostrSigner,
+    ): Boolean {
+        if (bookmarkList == null) return false
+        val privateBookmarks = bookmarkList.privateBookmarks(signer) ?: return false
+        return privateBookmarks.any {
+            it is EventBookmark && it.eventId == eventId
+        }
+    }
+
+    /**
+     * Checks if an event ID is bookmarked (public or private).
+     */
+    suspend fun isBookmarked(
+        bookmarkList: BookmarkListEvent?,
+        eventId: HexKey,
+        signer: NostrSigner,
+    ): Boolean =
+        isInPublicBookmarks(bookmarkList, eventId) ||
+            isInPrivateBookmarks(bookmarkList, eventId, signer)
+
+    /**
+     * Gets the bookmark list address for a user.
+     */
+    fun getBookmarkListAddress(pubKey: HexKey) = BookmarkListEvent.createBookmarkAddress(pubKey)
+}

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/model/nip57Zaps/ZapAction.kt

@@ -0,0 +1,163 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.model.nip57Zaps
+
+import com.vitorpamplona.amethyst.commons.services.lnurl.LightningAddressResolver
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
+import com.vitorpamplona.quartz.nip57Zaps.LnZapEvent
+import com.vitorpamplona.quartz.nip57Zaps.LnZapRequestEvent
+
+/**
+ * Handles NIP-57 zap requests and invoice fetching.
+ * Shared between Android and Desktop.
+ */
+object ZapAction {
+    /**
+     * Result of a zap operation.
+     */
+    sealed class ZapResult {
+        data class Invoice(
+            val bolt11: String,
+        ) : ZapResult()
+
+        data class Error(
+            val message: String,
+        ) : ZapResult()
+    }
+
+    /**
+     * Creates a zap request and fetches a BOLT11 invoice.
+     *
+     * @param targetEvent Event to zap
+     * @param lnAddress Lightning address of recipient
+     * @param amountSats Amount in satoshis
+     * @param message Optional zap message
+     * @param relays Relay hints (normalized URLs)
+     * @param signer Signer for the request
+     * @param resolver Lightning address resolver
+     * @param zapType Type of zap (default PUBLIC)
+     * @param onProgress Progress callback
+     */
+    suspend fun fetchZapInvoice(
+        targetEvent: Event,
+        lnAddress: String,
+        amountSats: Long,
+        message: String = "",
+        relays: Set<NormalizedRelayUrl>,
+        signer: NostrSigner,
+        resolver: LightningAddressResolver,
+        zapType: LnZapEvent.ZapType = LnZapEvent.ZapType.PUBLIC,
+        onProgress: (Float) -> Unit = {},
+    ): ZapResult {
+        if (!signer.isWriteable()) {
+            return ZapResult.Error("Signer is not writeable")
+        }
+
+        // Create zap request using quartz factory
+        val zapRequest =
+            try {
+                LnZapRequestEvent.create(
+                    zappedEvent = targetEvent,
+                    relays = relays,
+                    signer = signer,
+                    pollOption = null,
+                    message = message,
+                    zapType = zapType,
+                    toUserPubHex = null,
+                )
+            } catch (e: Exception) {
+                return ZapResult.Error("Failed to create zap request: ${e.message}")
+            }
+
+        onProgress(0.3f)
+
+        // Fetch invoice
+        val result =
+            resolver.fetchInvoice(
+                lnAddress = lnAddress,
+                milliSats = amountSats * 1000,
+                message = message,
+                zapRequest = zapRequest,
+                onProgress = { progress ->
+                    onProgress(0.3f + progress * 0.7f)
+                },
+            )
+
+        return when (result) {
+            is LightningAddressResolver.Result.Success -> ZapResult.Invoice(result.invoice)
+            is LightningAddressResolver.Result.Error -> ZapResult.Error(result.message)
+        }
+    }
+
+    /**
+     * Creates a zap request for a user profile (no event).
+     */
+    suspend fun fetchZapInvoiceForUser(
+        userPubHex: String,
+        lnAddress: String,
+        amountSats: Long,
+        message: String = "",
+        relays: Set<NormalizedRelayUrl>,
+        signer: NostrSigner,
+        resolver: LightningAddressResolver,
+        zapType: LnZapEvent.ZapType = LnZapEvent.ZapType.PUBLIC,
+        onProgress: (Float) -> Unit = {},
+    ): ZapResult {
+        if (!signer.isWriteable()) {
+            return ZapResult.Error("Signer is not writeable")
+        }
+
+        // Create zap request for user
+        val zapRequest =
+            try {
+                LnZapRequestEvent.create(
+                    userHex = userPubHex,
+                    relays = relays,
+                    signer = signer,
+                    message = message,
+                    zapType = zapType,
+                )
+            } catch (e: Exception) {
+                return ZapResult.Error("Failed to create zap request: ${e.message}")
+            }
+
+        onProgress(0.3f)
+
+        // Fetch invoice
+        val result =
+            resolver.fetchInvoice(
+                lnAddress = lnAddress,
+                milliSats = amountSats * 1000,
+                message = message,
+                zapRequest = zapRequest,
+                onProgress = { progress ->
+                    onProgress(0.3f + progress * 0.7f)
+                },
+            )
+
+        return when (result) {
+            is LightningAddressResolver.Result.Success -> ZapResult.Invoice(result.invoice)
+            is LightningAddressResolver.Result.Error -> ZapResult.Error(result.message)
+        }
+    }
+}

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/network/RelayConnectionManager.kt

@@ -107,6 +107,61 @@ open class RelayConnectionManager(
         send(event, connected)
     }
 
+    /**
+     * Sends an event to a specific relay (for NWC).
+     * Adds the relay if not already in the list.
+     */
+    fun sendToRelay(
+        relay: NormalizedRelayUrl,
+        event: Event,
+    ) {
+        if (relay !in availableRelays.value) {
+            updateRelayStatus(relay) { it.copy(connected = false, error = null) }
+        }
+        client.send(event, setOf(relay))
+    }
+
+    /**
+     * Subscribes on a specific relay (for NWC).
+     * Adds the relay if not already in the list.
+     */
+    fun subscribeOnRelay(
+        relay: NormalizedRelayUrl,
+        subId: String,
+        filters: List<Filter>,
+        onEvent: (Event, NormalizedRelayUrl) -> Unit,
+    ) {
+        if (relay !in availableRelays.value) {
+            updateRelayStatus(relay) { it.copy(connected = false, error = null) }
+        }
+        val filterMap = mapOf(relay to filters)
+        client.openReqSubscription(
+            subId = subId,
+            filters = filterMap,
+            listener =
+                object : IRequestListener {
+                    override fun onEvent(
+                        event: Event,
+                        isLive: Boolean,
+                        relay: NormalizedRelayUrl,
+                        forFilters: List<Filter>?,
+                    ) {
+                        onEvent(event, relay)
+                    }
+                },
+        )
+    }
+
+    /**
+     * Closes a subscription on a specific relay.
+     */
+    fun closeSubscription(
+        relay: NormalizedRelayUrl,
+        subId: String,
+    ) {
+        client.close(subId)
+    }
+
     private fun updateRelayStatus(
         url: NormalizedRelayUrl,
         update: (RelayStatus) -> RelayStatus,

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/services/lnurl/LightningAddressResolver.kt

@@ -0,0 +1,224 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.services.lnurl
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.vitorpamplona.quartz.lightning.LnInvoiceUtil
+import com.vitorpamplona.quartz.lightning.Lud06
+import com.vitorpamplona.quartz.nip57Zaps.LnZapRequestEvent
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import java.math.BigDecimal
+import java.math.RoundingMode
+import java.net.URLEncoder
+import kotlin.coroutines.cancellation.CancellationException
+
+/**
+ * Platform-agnostic Lightning Address resolver for LNURL-pay flow.
+ * Shared between Android and Desktop for zap functionality.
+ *
+ * Flow:
+ * 1. Lightning address (user@domain) → LNURL endpoint URL
+ * 2. Fetch LNURL-pay JSON → extract callback URL
+ * 3. Call callback with amount → get BOLT11 invoice
+ */
+class LightningAddressResolver(
+    private val httpClient: OkHttpClient,
+) {
+    private val mapper = jacksonObjectMapper()
+
+    /**
+     * Result of resolving a lightning address to a BOLT11 invoice.
+     */
+    sealed class Result {
+        data class Success(
+            val invoice: String,
+        ) : Result()
+
+        data class Error(
+            val message: String,
+        ) : Result()
+    }
+
+    /**
+     * Converts a lightning address to its LNURL-pay endpoint URL.
+     * Supports: user@domain, LNURL bech32
+     */
+    fun assembleUrl(lnAddress: String): String? {
+        val parts = lnAddress.split("@")
+
+        if (parts.size == 2) {
+            return "https://${parts[1]}/.well-known/lnurlp/${parts[0]}"
+        }
+
+        if (lnAddress.lowercase().startsWith("lnurl")) {
+            return Lud06().toLnUrlp(lnAddress)
+        }
+
+        return null
+    }
+
+    /**
+     * Resolves a lightning address to a BOLT11 invoice.
+     *
+     * @param lnAddress Lightning address (user@domain) or LNURL
+     * @param milliSats Amount in millisatoshis
+     * @param message Optional comment for the payment
+     * @param zapRequest Optional NIP-57 zap request event
+     * @param onProgress Progress callback (0.0 to 1.0)
+     */
+    suspend fun fetchInvoice(
+        lnAddress: String,
+        milliSats: Long,
+        message: String = "",
+        zapRequest: LnZapRequestEvent? = null,
+        onProgress: (Float) -> Unit = {},
+    ): Result =
+        withContext(Dispatchers.IO) {
+            try {
+                // Step 1: Resolve LN address to LNURL endpoint
+                val url =
+                    assembleUrl(lnAddress)
+                        ?: return@withContext Result.Error("Invalid lightning address: $lnAddress")
+
+                onProgress(0.2f)
+
+                // Step 2: Fetch LNURL-pay JSON
+                val lnurlJson =
+                    fetchUrl(url)
+                        ?: return@withContext Result.Error("Failed to fetch LNURL endpoint: $url")
+
+                onProgress(0.4f)
+
+                val lnurlp =
+                    try {
+                        mapper.readTree(lnurlJson)
+                    } catch (e: Exception) {
+                        return@withContext Result.Error("Failed to parse LNURL response")
+                    }
+
+                val callbackUrl =
+                    lnurlp?.get("callback")?.asText()?.ifBlank { null }
+                        ?: return@withContext Result.Error("No callback URL in LNURL response")
+
+                val allowsNostr = lnurlp.get("allowsNostr")?.asBoolean() ?: false
+
+                onProgress(0.5f)
+
+                // Step 3: Fetch invoice from callback
+                val invoiceJson =
+                    fetchInvoiceFromCallback(
+                        callbackUrl = callbackUrl,
+                        milliSats = milliSats,
+                        message = message,
+                        zapRequest = if (allowsNostr) zapRequest else null,
+                    ) ?: return@withContext Result.Error("Failed to fetch invoice from callback")
+
+                onProgress(0.7f)
+
+                val invoiceResponse =
+                    try {
+                        mapper.readTree(invoiceJson)
+                    } catch (e: Exception) {
+                        return@withContext Result.Error("Failed to parse invoice response")
+                    }
+
+                val pr = invoiceResponse?.get("pr")?.asText()?.ifBlank { null }
+
+                if (pr == null) {
+                    val reason = invoiceResponse?.get("reason")?.asText()?.ifBlank { null }
+                    return@withContext Result.Error(reason ?: "No invoice in response")
+                }
+
+                // Step 4: Validate invoice amount
+                val expectedAmountInSats =
+                    BigDecimal(milliSats)
+                        .divide(BigDecimal(1000), RoundingMode.HALF_UP)
+                        .toLong()
+
+                val invoiceAmount = LnInvoiceUtil.getAmountInSats(pr)
+
+                if (invoiceAmount.toLong() != expectedAmountInSats) {
+                    return@withContext Result.Error(
+                        "Invoice amount mismatch: got ${invoiceAmount.toLong()} sats, expected $expectedAmountInSats sats",
+                    )
+                }
+
+                onProgress(1.0f)
+
+                Result.Success(pr)
+            } catch (e: CancellationException) {
+                throw e
+            } catch (e: Exception) {
+                Result.Error(e.message ?: "Unknown error")
+            }
+        }
+
+    private suspend fun fetchUrl(url: String): String? =
+        withContext(Dispatchers.IO) {
+            try {
+                val request = Request.Builder().url(url).build()
+                httpClient.newCall(request).execute().use { response ->
+                    if (response.isSuccessful) {
+                        response.body?.string()
+                    } else {
+                        null
+                    }
+                }
+            } catch (e: Exception) {
+                if (e is CancellationException) throw e
+                null
+            }
+        }
+
+    private suspend fun fetchInvoiceFromCallback(
+        callbackUrl: String,
+        milliSats: Long,
+        message: String,
+        zapRequest: LnZapRequestEvent?,
+    ): String? =
+        withContext(Dispatchers.IO) {
+            try {
+                val encodedMessage = URLEncoder.encode(message, "utf-8")
+                val urlBinder = if (callbackUrl.contains("?")) "&" else "?"
+                var url = "$callbackUrl${urlBinder}amount=$milliSats&comment=$encodedMessage"
+
+                if (zapRequest != null) {
+                    val encodedRequest = URLEncoder.encode(zapRequest.toJson(), "utf-8")
+                    url += "&nostr=$encodedRequest"
+                }
+
+                val request = Request.Builder().url(url).build()
+                httpClient.newCall(request).execute().use { response ->
+                    if (response.isSuccessful) {
+                        response.body?.string()
+                    } else {
+                        null
+                    }
+                }
+            } catch (e: Exception) {
+                if (e is CancellationException) throw e
+                null
+            }
+        }
+}

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/services/nwc/NwcPaymentTracker.kt

@@ -0,0 +1,97 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.services.nwc
+
+import com.vitorpamplona.amethyst.commons.model.Note
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip47WalletConnect.LnZapPaymentResponseEvent
+import java.util.concurrent.ConcurrentHashMap
+
+/**
+ * Tracks pending NIP-47 (Nostr Wallet Connect) payment requests awaiting responses.
+ *
+ * Shared between Android and Desktop to provide consistent payment tracking behavior.
+ * Platform-specific caches (LocalCache, DesktopLocalCache) delegate to this tracker
+ * for the core request/response matching logic.
+ *
+ * Flow:
+ * 1. When sending payment request: [registerRequest] stores callback
+ * 2. When response arrives: [onResponseReceived] retrieves and removes pending request
+ * 3. Caller invokes callback and links notes via Note.addZapPayment()
+ */
+class NwcPaymentTracker {
+    /**
+     * Data for a pending payment request.
+     *
+     * @property zappedNote The note being zapped, if payment is for a zap
+     * @property onResponse Callback to invoke when wallet responds
+     */
+    data class PendingRequest(
+        val zappedNote: Note?,
+        val onResponse: suspend (LnZapPaymentResponseEvent) -> Unit,
+    )
+
+    private val awaitingRequests = ConcurrentHashMap<HexKey, PendingRequest>(10)
+
+    /**
+     * Registers a pending payment request.
+     *
+     * @param requestId Event ID of the LnZapPaymentRequestEvent
+     * @param zappedNote The note being zapped (null if not a zap payment)
+     * @param onResponse Callback invoked when response arrives
+     */
+    fun registerRequest(
+        requestId: HexKey,
+        zappedNote: Note?,
+        onResponse: suspend (LnZapPaymentResponseEvent) -> Unit,
+    ) {
+        awaitingRequests[requestId] = PendingRequest(zappedNote, onResponse)
+    }
+
+    /**
+     * Called when a payment response event is received.
+     * Retrieves and removes the pending request for the given request ID.
+     *
+     * @param requestId The 'e' tag from the response, pointing to original request
+     * @return PendingRequest if found, null otherwise
+     */
+    fun onResponseReceived(requestId: HexKey?): PendingRequest? {
+        if (requestId == null) return null
+        return awaitingRequests.remove(requestId)
+    }
+
+    /**
+     * Checks if there's a pending request for the given ID.
+     */
+    fun hasPendingRequest(requestId: HexKey): Boolean = awaitingRequests.containsKey(requestId)
+
+    /**
+     * Manually removes a pending request (e.g., on timeout).
+     */
+    fun cleanup(requestId: HexKey) {
+        awaitingRequests.remove(requestId)
+    }
+
+    /**
+     * Returns count of pending requests (for debugging/monitoring).
+     */
+    fun pendingCount(): Int = awaitingRequests.size
+}

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/subscriptions/FeedSubscription.kt

@@ -131,3 +131,187 @@ fun createThreadRepliesSubscription(
         onEvent = onEvent,
         onEose = onEose,
     )
+
+/**
+ * Creates a NIP-50 search subscription for user profiles.
+ * Requires NIP-50 compatible relays (e.g., relay.nostr.band, nostr.wine).
+ *
+ * @param searchQuery Text to search for in user profiles
+ * @param limit Maximum results to return
+ */
+fun createSearchPeopleSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    searchQuery: String,
+    limit: Int = 50,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig? {
+    if (searchQuery.isBlank()) return null
+
+    return SubscriptionConfig(
+        subId = generateSubId("search-people-${searchQuery.take(8)}"),
+        filters = listOf(FilterBuilders.searchPeople(searchQuery, limit)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+}
+
+/**
+ * Creates a NIP-50 search subscription for text notes.
+ * Requires NIP-50 compatible relays.
+ *
+ * @param searchQuery Text to search for in notes
+ * @param limit Maximum results to return
+ */
+fun createSearchNotesSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    searchQuery: String,
+    limit: Int = 50,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig? {
+    if (searchQuery.isBlank()) return null
+
+    return SubscriptionConfig(
+        subId = generateSubId("search-notes-${searchQuery.take(8)}"),
+        filters = listOf(FilterBuilders.searchNotes(searchQuery, limit)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+}
+
+/**
+ * Creates a subscription for zap receipts (kind 9735) for specific events.
+ *
+ * @param eventIds Event IDs to get zaps for
+ * @param limit Maximum zaps per event
+ */
+fun createZapsSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    eventIds: List<String>,
+    limit: Int = 100,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig? {
+    if (eventIds.isEmpty()) return null
+
+    return SubscriptionConfig(
+        subId = generateSubId("zaps-${eventIds.first().take(8)}"),
+        filters = listOf(FilterBuilders.zapsForEvents(eventIds, limit)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+}
+
+/**
+ * Creates a subscription for reactions (kind 7) for specific events.
+ *
+ * @param eventIds Event IDs to get reactions for
+ * @param limit Maximum reactions per event
+ */
+fun createReactionsSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    eventIds: List<String>,
+    limit: Int = 100,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig? {
+    if (eventIds.isEmpty()) return null
+
+    return SubscriptionConfig(
+        subId = generateSubId("reactions-${eventIds.first().take(8)}"),
+        filters = listOf(FilterBuilders.reactionsForEvents(eventIds, limit)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+}
+
+/**
+ * Creates a subscription for replies (kind 1) to specific events.
+ *
+ * @param eventIds Event IDs to get replies for
+ * @param limit Maximum replies per event
+ */
+fun createRepliesSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    eventIds: List<String>,
+    limit: Int = 100,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig? {
+    if (eventIds.isEmpty()) return null
+
+    return SubscriptionConfig(
+        subId = generateSubId("replies-${eventIds.first().take(8)}"),
+        filters = listOf(FilterBuilders.repliesForEvents(eventIds, limit)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+}
+
+/**
+ * Creates a subscription for reposts (kind 6) of specific events.
+ *
+ * @param eventIds Event IDs to get reposts for
+ * @param limit Maximum reposts per event
+ */
+fun createRepostsSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    eventIds: List<String>,
+    limit: Int = 100,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig? {
+    if (eventIds.isEmpty()) return null
+
+    return SubscriptionConfig(
+        subId = generateSubId("reposts-${eventIds.first().take(8)}"),
+        filters = listOf(FilterBuilders.repostsForEvents(eventIds, limit)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+}
+
+/**
+ * Creates a subscription config for global long-form content (kind 30023, NIP-23).
+ */
+fun createLongFormFeedSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    limit: Int = 30,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig =
+    SubscriptionConfig(
+        subId = generateSubId("longform-feed"),
+        filters = listOf(FilterBuilders.longFormGlobal(limit = limit)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+
+/**
+ * Creates a subscription config for long-form content from followed users.
+ */
+fun createFollowingLongFormFeedSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    followedUsers: List<String>,
+    limit: Int = 30,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig? {
+    if (followedUsers.isEmpty()) return null
+
+    return SubscriptionConfig(
+        subId = generateSubId("longform-following"),
+        filters = listOf(FilterBuilders.longFormFromAuthors(followedUsers, limit = limit)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+}

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/subscriptions/FilterBuilders.kt

@@ -83,6 +83,18 @@ object FilterBuilders {
             limit = 1,
         )
 
+    /**
+     * Creates a filter for user metadata (kind 0) from multiple authors.
+     *
+     * @param pubKeyHexList List of author public keys (hex-encoded, 64 chars each)
+     * @return Filter for user metadata
+     */
+    fun userMetadataBatch(pubKeyHexList: List<String>): Filter =
+        Filter(
+            kinds = listOf(0), // MetadataEvent.KIND
+            authors = pubKeyHexList,
+        )
+
     /**
      * Creates a filter for contact list (kind 3) from a specific author.
      *
@@ -256,6 +268,155 @@ object FilterBuilders {
             since = since,
             until = until,
         )
+
+    /**
+     * Creates a NIP-50 search filter for user metadata (kind 0).
+     * Searches user profiles by name, displayName, about, nip05, etc.
+     * Requires a NIP-50 compatible relay (e.g., relay.nostr.band, nostr.wine).
+     *
+     * @param searchQuery The text to search for in user profiles
+     * @param limit Maximum number of results to return
+     * @return Filter for NIP-50 search
+     */
+    fun searchPeople(
+        searchQuery: String,
+        limit: Int = 50,
+    ): Filter =
+        Filter(
+            kinds = listOf(0), // MetadataEvent.KIND
+            search = searchQuery,
+            limit = limit,
+        )
+
+    /**
+     * Creates a NIP-50 search filter for text notes (kind 1).
+     * Searches note content.
+     * Requires a NIP-50 compatible relay.
+     *
+     * @param searchQuery The text to search for in notes
+     * @param limit Maximum number of results to return
+     * @return Filter for NIP-50 search
+     */
+    fun searchNotes(
+        searchQuery: String,
+        limit: Int = 50,
+    ): Filter =
+        Filter(
+            kinds = listOf(1), // TextNoteEvent.KIND
+            search = searchQuery,
+            limit = limit,
+        )
+
+    /**
+     * Creates a filter for zap receipts (kind 9735) for specific events.
+     *
+     * @param eventIds List of event IDs to get zaps for
+     * @param limit Maximum number of events to request
+     * @return Filter for zap receipts
+     */
+    fun zapsForEvents(
+        eventIds: List<String>,
+        limit: Int? = null,
+    ): Filter =
+        Filter(
+            kinds = listOf(9735), // LnZapEvent.KIND
+            tags = mapOf("e" to eventIds),
+            limit = limit,
+        )
+
+    /**
+     * Creates a filter for reactions (kind 7) for specific events.
+     *
+     * @param eventIds List of event IDs to get reactions for
+     * @param limit Maximum number of events to request
+     * @return Filter for reactions
+     */
+    fun reactionsForEvents(
+        eventIds: List<String>,
+        limit: Int? = null,
+    ): Filter =
+        Filter(
+            kinds = listOf(7), // ReactionEvent.KIND
+            tags = mapOf("e" to eventIds),
+            limit = limit,
+        )
+
+    /**
+     * Creates a filter for replies (kind 1) to specific events.
+     *
+     * @param eventIds List of event IDs to get replies for
+     * @param limit Maximum number of events to request
+     * @return Filter for replies
+     */
+    fun repliesForEvents(
+        eventIds: List<String>,
+        limit: Int? = null,
+    ): Filter =
+        Filter(
+            kinds = listOf(1), // TextNoteEvent.KIND
+            tags = mapOf("e" to eventIds),
+            limit = limit,
+        )
+
+    /**
+     * Creates a filter for reposts (kind 6) of specific events.
+     *
+     * @param eventIds List of event IDs to get reposts for
+     * @param limit Maximum number of events to request
+     * @return Filter for reposts
+     */
+    fun repostsForEvents(
+        eventIds: List<String>,
+        limit: Int? = null,
+    ): Filter =
+        Filter(
+            kinds = listOf(6), // RepostEvent.KIND
+            tags = mapOf("e" to eventIds),
+            limit = limit,
+        )
+
+    /**
+     * Creates a filter for long-form content (kind 30023, NIP-23).
+     *
+     * @param limit Maximum number of events to request
+     * @param since Timestamp for events with publication time ≥ this value
+     * @param until Timestamp for events with publication time ≤ this value
+     * @return Filter for long-form content
+     */
+    fun longFormGlobal(
+        limit: Int? = null,
+        since: Long? = null,
+        until: Long? = null,
+    ): Filter =
+        Filter(
+            kinds = listOf(30023), // LongTextNoteEvent.KIND
+            limit = limit,
+            since = since,
+            until = until,
+        )
+
+    /**
+     * Creates a filter for long-form content (kind 30023) from specific authors.
+     *
+     * @param authors List of author public keys (hex-encoded, 64 chars each)
+     * @param limit Maximum number of events to request
+     * @param since Timestamp for events with publication time ≥ this value
+     * @param until Timestamp for events with publication time ≤ this value
+     * @return Filter for long-form content from specified authors
+     */
+    fun longFormFromAuthors(
+        authors: List<String>,
+        limit: Int? = null,
+        since: Long? = null,
+        until: Long? = null,
+    ): Filter =
+        Filter(
+            kinds = listOf(30023), // LongTextNoteEvent.KIND
+            authors = authors,
+            limit = limit,
+            since = since,
+            until = until,
+        )
 }
 
 /**

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/subscriptions/ProfileSubscription.kt

@@ -26,20 +26,50 @@ import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
 
 /**
  * Creates a subscription config for user metadata (kind 0).
+ * Returns null if the pubKeyHex is invalid (not 64 characters).
  */
 fun createMetadataSubscription(
     relays: Set<NormalizedRelayUrl>,
     pubKeyHex: String,
     onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
     onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
-): SubscriptionConfig =
-    SubscriptionConfig(
+): SubscriptionConfig? {
+    // Validate pubkey length
+    if (pubKeyHex.length != 64) {
+        return null
+    }
+    return SubscriptionConfig(
         subId = generateSubId("meta-${pubKeyHex.take(8)}"),
         filters = listOf(FilterBuilders.userMetadata(pubKeyHex)),
         relays = relays,
         onEvent = onEvent,
         onEose = onEose,
     )
+}
+
+/**
+ * Creates a subscription config for metadata of multiple users (kind 0).
+ * Useful for batch-fetching author profiles.
+ * Filters out any invalid pubkeys (not 64 characters).
+ */
+fun createBatchMetadataSubscription(
+    relays: Set<NormalizedRelayUrl>,
+    pubKeyHexList: List<String>,
+    onEvent: (Event, Boolean, NormalizedRelayUrl, List<Filter>?) -> Unit,
+    onEose: (NormalizedRelayUrl, List<Filter>?) -> Unit = { _, _ -> },
+): SubscriptionConfig? {
+    // Filter out invalid pubkeys
+    val validPubkeys = pubKeyHexList.filter { it.length == 64 }
+    if (validPubkeys.isEmpty()) return null
+
+    return SubscriptionConfig(
+        subId = generateSubId("meta-batch-${validPubkeys.size}"),
+        filters = listOf(FilterBuilders.userMetadataBatch(validPubkeys)),
+        relays = relays,
+        onEvent = onEvent,
+        onEose = onEose,
+    )
+}
 
 /**
  * Creates a subscription config for user posts (kind 1).

commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/util/EventExtensions.kt

@@ -20,6 +20,8 @@
  */
 package com.vitorpamplona.amethyst.commons.util
 
+import com.vitorpamplona.amethyst.commons.model.User
+import com.vitorpamplona.amethyst.commons.model.cache.ICacheProvider
 import com.vitorpamplona.amethyst.commons.ui.note.NoteDisplayData
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.core.hexToByteArrayOrNull
@@ -28,7 +30,7 @@ import com.vitorpamplona.quartz.nip19Bech32.toNpub
 /**
  * Extension to convert Event to NoteDisplayData for the shared NoteCard.
  */
-fun Event.toNoteDisplayData(): NoteDisplayData {
+fun Event.toNoteDisplayData(cache: ICacheProvider? = null): NoteDisplayData {
     val npub =
         try {
             pubKey.hexToByteArrayOrNull()?.toNpub() ?: pubKey.take(16) + "..."
@@ -36,10 +38,13 @@ fun Event.toNoteDisplayData(): NoteDisplayData {
             pubKey.take(16) + "..."
         }
 
+    val pictureUrl = (cache?.getUserIfExists(pubKey) as? User)?.profilePicture()
+
     return NoteDisplayData(
         id = id,
         pubKeyHex = pubKey,
         pubKeyDisplay = npub,
+        profilePictureUrl = pictureUrl,
         content = content,
         createdAt = createdAt,
     )

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/DesktopPreferences.kt

@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.desktop
+
+import com.vitorpamplona.amethyst.commons.subscriptions.FeedMode
+import java.util.prefs.Preferences
+
+/**
+ * Simple preferences storage using Java's Preferences API.
+ * Data is stored in platform-appropriate location:
+ * - macOS: ~/Library/Preferences/com.apple.java.util.prefs.plist
+ * - Linux: ~/.java/.userPrefs/
+ * - Windows: Registry under HKEY_CURRENT_USER\Software\JavaSoft\Prefs
+ */
+object DesktopPreferences {
+    private val prefs: Preferences = Preferences.userNodeForPackage(DesktopPreferences::class.java)
+
+    private const val KEY_FEED_MODE = "feed_mode"
+    private const val KEY_LAST_SCREEN = "last_screen"
+
+    var feedMode: FeedMode
+        get() {
+            val name = prefs.get(KEY_FEED_MODE, FeedMode.GLOBAL.name)
+            return try {
+                FeedMode.valueOf(name)
+            } catch (e: Exception) {
+                FeedMode.GLOBAL
+            }
+        }
+        set(value) {
+            prefs.put(KEY_FEED_MODE, value.name)
+        }
+
+    var lastScreen: String
+        get() = prefs.get(KEY_LAST_SCREEN, "Feed")
+        set(value) {
+            prefs.put(KEY_LAST_SCREEN, value)
+        }
+}

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/Main.kt

@@ -34,6 +34,7 @@ import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.Article
 import androidx.compose.material.icons.filled.Email
 import androidx.compose.material.icons.filled.Home
 import androidx.compose.material.icons.filled.Notifications
@@ -42,6 +43,7 @@ import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material.icons.filled.Search
 import androidx.compose.material.icons.filled.Settings
 import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
@@ -50,12 +52,15 @@ import androidx.compose.material3.NavigationRail
 import androidx.compose.material3.NavigationRailItem
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.SnackbarHost
+import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.VerticalDivider
 import androidx.compose.material3.darkColorScheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -78,14 +83,19 @@ import com.vitorpamplona.amethyst.commons.account.AccountState
 import com.vitorpamplona.amethyst.commons.ui.profile.ProfileInfoCard
 import com.vitorpamplona.amethyst.commons.ui.relay.RelayStatusCard
 import com.vitorpamplona.amethyst.commons.ui.screens.MessagesPlaceholder
-import com.vitorpamplona.amethyst.commons.ui.screens.SearchPlaceholder
+import com.vitorpamplona.amethyst.desktop.cache.DesktopLocalCache
 import com.vitorpamplona.amethyst.desktop.network.DesktopRelayConnectionManager
+import com.vitorpamplona.amethyst.desktop.ui.BookmarksScreen
 import com.vitorpamplona.amethyst.desktop.ui.ComposeNoteDialog
 import com.vitorpamplona.amethyst.desktop.ui.FeedScreen
 import com.vitorpamplona.amethyst.desktop.ui.LoginScreen
 import com.vitorpamplona.amethyst.desktop.ui.NotificationsScreen
+import com.vitorpamplona.amethyst.desktop.ui.ReadsScreen
+import com.vitorpamplona.amethyst.desktop.ui.SearchScreen
 import com.vitorpamplona.amethyst.desktop.ui.ThreadScreen
 import com.vitorpamplona.amethyst.desktop.ui.UserProfileScreen
+import com.vitorpamplona.amethyst.desktop.ui.ZapFeedback
+import com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
@@ -99,8 +109,12 @@ private val isMacOS = System.getProperty("os.name").lowercase().contains("mac")
 sealed class DesktopScreen {
     object Feed : DesktopScreen()
 
+    object Reads : DesktopScreen()
+
     object Search : DesktopScreen()
 
+    object Bookmarks : DesktopScreen()
+
     object Messages : DesktopScreen()
 
     object Notifications : DesktopScreen()
@@ -127,6 +141,8 @@ fun main() =
                 position = WindowPosition.Aligned(Alignment.Center),
             )
         var showComposeDialog by remember { mutableStateOf(false) }
+        var replyToNote by remember { mutableStateOf<com.vitorpamplona.quartz.nip01Core.core.Event?>(null) }
+        var currentScreen by remember { mutableStateOf<DesktopScreen>(DesktopScreen.Feed) }
 
         Window(
             onCloseRequest = ::exitApplication,
@@ -154,7 +170,7 @@ fun main() =
                             } else {
                                 KeyShortcut(Key.Comma, ctrl = true)
                             },
-                        onClick = { /* TODO: Open settings */ },
+                        onClick = { currentScreen = DesktopScreen.Settings },
                     )
                     Separator()
                     Item(
@@ -202,21 +218,35 @@ fun main() =
             }
 
             App(
+                currentScreen = currentScreen,
+                onScreenChange = { currentScreen = it },
                 showComposeDialog = showComposeDialog,
                 onShowComposeDialog = { showComposeDialog = true },
-                onDismissComposeDialog = { showComposeDialog = false },
+                onShowReplyDialog = { event ->
+                    replyToNote = event
+                    showComposeDialog = true
+                },
+                onDismissComposeDialog = {
+                    showComposeDialog = false
+                    replyToNote = null
+                },
+                replyToNote = replyToNote,
             )
         }
     }
 
 @Composable
 fun App(
+    currentScreen: DesktopScreen,
+    onScreenChange: (DesktopScreen) -> Unit,
     showComposeDialog: Boolean,
     onShowComposeDialog: () -> Unit,
+    onShowReplyDialog: (com.vitorpamplona.quartz.nip01Core.core.Event) -> Unit,
     onDismissComposeDialog: () -> Unit,
+    replyToNote: com.vitorpamplona.quartz.nip01Core.core.Event?,
 ) {
-    var currentScreen by remember { mutableStateOf<DesktopScreen>(DesktopScreen.Feed) }
     val relayManager = remember { DesktopRelayConnectionManager() }
+    val localCache = remember { DesktopLocalCache() }
     val accountManager = remember { AccountManager.create() }
     val accountState by accountManager.accountState.collectAsState()
     val scope = remember { CoroutineScope(SupervisorJob() + Dispatchers.Main) }
@@ -246,19 +276,28 @@ fun App(
                 is AccountState.LoggedOut -> {
                     LoginScreen(
                         accountManager = accountManager,
-                        onLoginSuccess = { currentScreen = DesktopScreen.Feed },
+                        onLoginSuccess = { onScreenChange(DesktopScreen.Feed) },
                     )
                 }
                 is AccountState.LoggedIn -> {
                     val account = accountState as AccountState.LoggedIn
+                    val nwcConnection by accountManager.nwcConnection.collectAsState()
+
+                    // Load NWC connection on first composition
+                    LaunchedEffect(Unit) {
+                        accountManager.loadNwcConnection()
+                    }
 
                     MainContent(
                         currentScreen = currentScreen,
-                        onScreenChange = { currentScreen = it },
+                        onScreenChange = onScreenChange,
                         relayManager = relayManager,
+                        localCache = localCache,
                         accountManager = accountManager,
                         account = account,
+                        nwcConnection = nwcConnection,
                         onShowComposeDialog = onShowComposeDialog,
+                        onShowReplyDialog = onShowReplyDialog,
                     )
 
                     // Compose dialog
@@ -267,6 +306,7 @@ fun App(
                             onDismiss = onDismissComposeDialog,
                             relayManager = relayManager,
                             account = account,
+                            replyTo = replyToNote,
                         )
                     }
                 }
@@ -280,10 +320,31 @@ fun MainContent(
     currentScreen: DesktopScreen,
     onScreenChange: (DesktopScreen) -> Unit,
     relayManager: DesktopRelayConnectionManager,
+    localCache: DesktopLocalCache,
     accountManager: AccountManager,
     account: AccountState.LoggedIn,
+    nwcConnection: Nip47WalletConnect.Nip47URINorm?,
     onShowComposeDialog: () -> Unit,
+    onShowReplyDialog: (com.vitorpamplona.quartz.nip01Core.core.Event) -> Unit,
 ) {
+    val snackbarHostState = remember { SnackbarHostState() }
+    val scope = rememberCoroutineScope()
+
+    val onZapFeedback: (ZapFeedback) -> Unit = { feedback ->
+        scope.launch {
+            val message =
+                when (feedback) {
+                    is ZapFeedback.Success -> "Zapped ${feedback.amountSats} sats"
+                    is ZapFeedback.ExternalWallet -> "Invoice sent to wallet (${feedback.amountSats} sats)"
+                    is ZapFeedback.Error -> "Zap failed: ${feedback.message}"
+                    is ZapFeedback.Timeout -> "Zap timed out"
+                    is ZapFeedback.NoLightningAddress -> "User has no lightning address"
+                }
+            snackbarHostState.showSnackbar(message)
+        }
+    }
+
+    Box(Modifier.fillMaxSize()) {
         Row(Modifier.fillMaxSize()) {
             // Sidebar Navigation
             NavigationRail(
@@ -299,6 +360,13 @@ fun MainContent(
                     onClick = { onScreenChange(DesktopScreen.Feed) },
                 )
 
+                NavigationRailItem(
+                    icon = { Icon(Icons.AutoMirrored.Filled.Article, contentDescription = "Reads") },
+                    label = { Text("Reads") },
+                    selected = currentScreen == DesktopScreen.Reads,
+                    onClick = { onScreenChange(DesktopScreen.Reads) },
+                )
+
                 NavigationRailItem(
                     icon = { Icon(Icons.Default.Search, contentDescription = "Search") },
                     label = { Text("Search") },
@@ -306,6 +374,13 @@ fun MainContent(
                     onClick = { onScreenChange(DesktopScreen.Search) },
                 )
 
+                NavigationRailItem(
+                    icon = { Icon(com.vitorpamplona.amethyst.commons.icons.Bookmark, contentDescription = "Bookmarks") },
+                    label = { Text("Bookmarks") },
+                    selected = currentScreen == DesktopScreen.Bookmarks,
+                    onClick = { onScreenChange(DesktopScreen.Bookmarks) },
+                )
+
                 NavigationRailItem(
                     icon = { Icon(Icons.Default.Email, contentDescription = "Messages") },
                     label = { Text("DMs") },
@@ -351,7 +426,9 @@ fun MainContent(
                     DesktopScreen.Feed ->
                         FeedScreen(
                             relayManager = relayManager,
+                            localCache = localCache,
                             account = account,
+                            nwcConnection = nwcConnection,
                             onCompose = onShowComposeDialog,
                             onNavigateToProfile = { pubKeyHex ->
                                 onScreenChange(DesktopScreen.UserProfile(pubKeyHex))
@@ -359,37 +436,82 @@ fun MainContent(
                             onNavigateToThread = { noteId ->
                                 onScreenChange(DesktopScreen.Thread(noteId))
                             },
+                            onZapFeedback = onZapFeedback,
+                        )
+                    DesktopScreen.Reads ->
+                        ReadsScreen(
+                            relayManager = relayManager,
+                            localCache = localCache,
+                            account = account,
+                            onNavigateToProfile = { pubKeyHex ->
+                                onScreenChange(DesktopScreen.UserProfile(pubKeyHex))
+                            },
+                            onNavigateToArticle = { noteId ->
+                                onScreenChange(DesktopScreen.Thread(noteId))
+                            },
+                        )
+                    DesktopScreen.Search ->
+                        SearchScreen(
+                            localCache = localCache,
+                            relayManager = relayManager,
+                            onNavigateToProfile = { pubKeyHex ->
+                                onScreenChange(DesktopScreen.UserProfile(pubKeyHex))
+                            },
+                            onNavigateToThread = { noteId ->
+                                onScreenChange(DesktopScreen.Thread(noteId))
+                            },
+                        )
+                    DesktopScreen.Bookmarks ->
+                        BookmarksScreen(
+                            relayManager = relayManager,
+                            localCache = localCache,
+                            account = account,
+                            nwcConnection = nwcConnection,
+                            onNavigateToProfile = { pubKeyHex ->
+                                onScreenChange(DesktopScreen.UserProfile(pubKeyHex))
+                            },
+                            onNavigateToThread = { noteId ->
+                                onScreenChange(DesktopScreen.Thread(noteId))
+                            },
+                            onZapFeedback = onZapFeedback,
                         )
-                DesktopScreen.Search -> SearchPlaceholder()
                     DesktopScreen.Messages -> MessagesPlaceholder()
                     DesktopScreen.Notifications -> NotificationsScreen(relayManager, account)
                     DesktopScreen.MyProfile ->
                         UserProfileScreen(
                             pubKeyHex = account.pubKeyHex,
                             relayManager = relayManager,
+                            localCache = localCache,
                             account = account,
+                            nwcConnection = nwcConnection,
                             onBack = { onScreenChange(DesktopScreen.Feed) },
                             onCompose = onShowComposeDialog,
                             onNavigateToProfile = { pubKeyHex ->
                                 onScreenChange(DesktopScreen.UserProfile(pubKeyHex))
                             },
+                            onZapFeedback = onZapFeedback,
                         )
                     is DesktopScreen.UserProfile ->
                         UserProfileScreen(
                             pubKeyHex = currentScreen.pubKeyHex,
                             relayManager = relayManager,
+                            localCache = localCache,
                             account = account,
+                            nwcConnection = nwcConnection,
                             onBack = { onScreenChange(DesktopScreen.Feed) },
                             onCompose = onShowComposeDialog,
                             onNavigateToProfile = { pubKeyHex ->
                                 onScreenChange(DesktopScreen.UserProfile(pubKeyHex))
                             },
+                            onZapFeedback = onZapFeedback,
                         )
                     is DesktopScreen.Thread ->
                         ThreadScreen(
                             noteId = currentScreen.noteId,
                             relayManager = relayManager,
+                            localCache = localCache,
                             account = account,
+                            nwcConnection = nwcConnection,
                             onBack = { onScreenChange(DesktopScreen.Feed) },
                             onNavigateToProfile = { pubKeyHex ->
                                 onScreenChange(DesktopScreen.UserProfile(pubKeyHex))
@@ -397,11 +519,20 @@ fun MainContent(
                             onNavigateToThread = { noteId ->
                                 onScreenChange(DesktopScreen.Thread(noteId))
                             },
+                            onZapFeedback = onZapFeedback,
+                            onReply = onShowReplyDialog,
                         )
-                DesktopScreen.Settings -> RelaySettingsScreen(relayManager, account)
+                    DesktopScreen.Settings -> RelaySettingsScreen(relayManager, account, accountManager)
                 }
             }
         }
+
+        // Snackbar for zap feedback
+        SnackbarHost(
+            hostState = snackbarHostState,
+            modifier = Modifier.align(Alignment.BottomCenter).padding(16.dp),
+        )
+    }
 }
 
 @Composable
@@ -443,10 +574,19 @@ fun ProfileScreen(
 fun RelaySettingsScreen(
     relayManager: DesktopRelayConnectionManager,
     account: AccountState.LoggedIn,
+    accountManager: AccountManager,
 ) {
     val relayStatuses by relayManager.relayStatuses.collectAsState()
     val connectedRelays by relayManager.connectedRelays.collectAsState()
+    val nwcConnection by accountManager.nwcConnection.collectAsState()
     var newRelayUrl by remember { mutableStateOf("") }
+    var nwcInput by remember { mutableStateOf("") }
+    var nwcError by remember { mutableStateOf<String?>(null) }
+
+    // Load NWC on first composition
+    LaunchedEffect(Unit) {
+        accountManager.loadNwcConnection()
+    }
 
     Column(modifier = Modifier.fillMaxSize()) {
         Text(
@@ -457,6 +597,88 @@ fun RelaySettingsScreen(
 
         Spacer(Modifier.height(24.dp))
 
+        // Wallet Connect Section
+        Text(
+            "Wallet Connect (NWC)",
+            style = MaterialTheme.typography.titleLarge,
+            color = MaterialTheme.colorScheme.onBackground,
+        )
+        Spacer(Modifier.height(8.dp))
+
+        Text(
+            "Connect a Lightning wallet to enable zaps. Get a connection string from Alby, Mutiny, or other NWC-compatible wallets.",
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+
+        Spacer(Modifier.height(12.dp))
+
+        if (nwcConnection != null) {
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween,
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Column {
+                    Text(
+                        "Wallet Connected",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.primary,
+                    )
+                    Text(
+                        "Relay: ${nwcConnection!!.relayUri.url}",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+                OutlinedButton(
+                    onClick = { accountManager.clearNwcConnection() },
+                    colors =
+                        ButtonDefaults.outlinedButtonColors(
+                            contentColor = MaterialTheme.colorScheme.error,
+                        ),
+                ) {
+                    Text("Disconnect")
+                }
+            }
+        } else {
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                OutlinedTextField(
+                    value = nwcInput,
+                    onValueChange = {
+                        nwcInput = it
+                        nwcError = null
+                    },
+                    label = { Text("NWC Connection String") },
+                    placeholder = { Text("nostr+walletconnect://...") },
+                    modifier = Modifier.weight(1f),
+                    singleLine = true,
+                    isError = nwcError != null,
+                    supportingText = nwcError?.let { { Text(it, color = MaterialTheme.colorScheme.error) } },
+                )
+                Button(
+                    onClick = {
+                        val result = accountManager.setNwcConnection(nwcInput)
+                        result.fold(
+                            onSuccess = { nwcInput = "" },
+                            onFailure = { nwcError = it.message ?: "Invalid connection string" },
+                        )
+                    },
+                    enabled = nwcInput.isNotBlank(),
+                ) {
+                    Text("Connect")
+                }
+            }
+        }
+
+        Spacer(Modifier.height(24.dp))
+        HorizontalDivider()
+        Spacer(Modifier.height(24.dp))
+
         // Developer Settings Section (only in debug mode)
         if (DebugConfig.isDebugMode) {
             com.vitorpamplona.amethyst.desktop.ui

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/cache/DesktopLocalCache.kt

@@ -0,0 +1,262 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.desktop.cache
+
+import com.vitorpamplona.amethyst.commons.model.Note
+import com.vitorpamplona.amethyst.commons.model.User
+import com.vitorpamplona.amethyst.commons.model.cache.ICacheEventStream
+import com.vitorpamplona.amethyst.commons.model.cache.ICacheProvider
+import com.vitorpamplona.amethyst.commons.model.cache.IChannel
+import com.vitorpamplona.amethyst.commons.services.nwc.NwcPaymentTracker
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import com.vitorpamplona.quartz.nip19Bech32.decodePublicKeyAsHexOrNull
+import com.vitorpamplona.quartz.nip47WalletConnect.LnZapPaymentRequestEvent
+import com.vitorpamplona.quartz.nip47WalletConnect.LnZapPaymentResponseEvent
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.launch
+import java.util.concurrent.ConcurrentHashMap
+
+/**
+ * Desktop implementation of ICacheProvider.
+ *
+ * Provides in-memory caching of Users and Notes for the desktop application.
+ * Supports searching users by name prefix for the search functionality.
+ */
+class DesktopLocalCache : ICacheProvider {
+    private val users = ConcurrentHashMap<HexKey, User>()
+    private val notes = ConcurrentHashMap<HexKey, Note>()
+    private val deletedEvents = ConcurrentHashMap.newKeySet<HexKey>()
+
+    private val eventStream = DesktopCacheEventStream()
+
+    val paymentTracker = NwcPaymentTracker()
+
+    // ----- User operations -----
+
+    override fun getUserIfExists(pubkey: HexKey): User? = users[pubkey]
+
+    override fun getOrCreateUser(pubkey: HexKey): User =
+        users.getOrPut(pubkey) {
+            // Create placeholder notes for relay lists
+            val nip65Note = getOrCreateNote("nip65:$pubkey")
+            val dmNote = getOrCreateNote("dm:$pubkey")
+            User(pubkey, nip65Note, dmNote, this)
+        }
+
+    override fun countUsers(predicate: (String, Any) -> Boolean): Int = users.count { (key, user) -> predicate(key, user) }
+
+    override fun findUsersStartingWith(
+        prefix: String,
+        limit: Int,
+    ): List<User> {
+        if (prefix.isBlank()) return emptyList()
+
+        // Check if it's a valid pubkey/npub first
+        val pubkeyHex = decodePublicKeyAsHexOrNull(prefix)
+        if (pubkeyHex != null) {
+            val user = getUserIfExists(pubkeyHex)
+            if (user != null) return listOf(user)
+        }
+
+        // Search by name/displayName/nip05/lud16
+        return users.values
+            .filter { user ->
+                user.anyNameStartsWith(prefix) ||
+                    user.pubkeyHex.startsWith(prefix, ignoreCase = true) ||
+                    user.pubkeyNpub().startsWith(prefix, ignoreCase = true)
+            }.sortedWith(
+                compareBy(
+                    { !it.toBestDisplayName().startsWith(prefix, ignoreCase = true) },
+                    { it.toBestDisplayName().lowercase() },
+                    { it.pubkeyHex },
+                ),
+            ).take(limit)
+    }
+
+    /**
+     * Updates user metadata from a MetadataEvent.
+     * Called when receiving kind 0 events from relays.
+     */
+    fun consumeMetadata(event: MetadataEvent) {
+        val user = getOrCreateUser(event.pubKey)
+
+        // Only update if newer
+        val currentMetadata = user.latestMetadata
+        if (currentMetadata == null || event.createdAt > currentMetadata.createdAt) {
+            user.latestMetadata = event
+            user.info = event.contactMetaData()
+        }
+    }
+
+    // ----- NWC Payment operations -----
+
+    /**
+     * Consumes a NIP-47 payment request event.
+     * Registers the request with the tracker and links it to the zapped note.
+     *
+     * @param event The payment request event
+     * @param zappedNote The note being zapped (if this payment is for a zap)
+     * @param relay The relay this event came from
+     * @param onResponse Callback invoked when wallet responds
+     * @return true if event was processed, false if already seen
+     */
+    fun consume(
+        event: LnZapPaymentRequestEvent,
+        zappedNote: Note?,
+        relay: NormalizedRelayUrl?,
+        onResponse: suspend (LnZapPaymentResponseEvent) -> Unit,
+    ): Boolean {
+        val note = getOrCreateNote(event.id)
+        val author = getOrCreateUser(event.pubKey)
+
+        // Already processed this event
+        if (note.event != null) return false
+
+        note.loadEvent(event, author, emptyList())
+        relay?.let { note.addRelay(it) }
+
+        zappedNote?.addZapPayment(note, null)
+        paymentTracker.registerRequest(event.id, zappedNote, onResponse)
+
+        return true
+    }
+
+    /**
+     * Consumes a NIP-47 payment response event.
+     * Matches to pending request, links notes, and invokes callback.
+     *
+     * @param event The payment response event
+     * @param relay The relay this event came from
+     * @return true if event was processed, false if no matching request
+     */
+    fun consume(
+        event: LnZapPaymentResponseEvent,
+        relay: NormalizedRelayUrl?,
+    ): Boolean {
+        val requestId = event.requestId()
+        val pending = paymentTracker.onResponseReceived(requestId) ?: return false
+
+        val requestNote = requestId?.let { getNoteIfExists(it) }
+        val note = getOrCreateNote(event.id)
+        val author = getOrCreateUser(event.pubKey)
+
+        // Already processed this event
+        if (note.event != null) return false
+
+        note.loadEvent(event, author, emptyList())
+        relay?.let { note.addRelay(it) }
+
+        // Link response to zapped note via request
+        requestNote?.let { req -> pending.zappedNote?.addZapPayment(req, note) }
+
+        // Invoke callback on IO dispatcher
+        GlobalScope.launch(Dispatchers.IO) {
+            pending.onResponse(event)
+        }
+
+        return true
+    }
+
+    // ----- Note operations -----
+
+    override fun getNoteIfExists(hexKey: HexKey): Note? = notes[hexKey]
+
+    override fun checkGetOrCreateNote(hexKey: HexKey): Note = getOrCreateNote(hexKey)
+
+    fun getOrCreateNote(hexKey: HexKey): Note =
+        notes.getOrPut(hexKey) {
+            Note(hexKey, this)
+        }
+
+    // ----- Channel operations -----
+
+    override fun getAnyChannel(note: Any?): IChannel? {
+        // Desktop doesn't support channels yet
+        return null
+    }
+
+    // ----- Deletion tracking -----
+
+    override fun hasBeenDeleted(event: Any): Boolean =
+        when (event) {
+            is Note -> deletedEvents.contains(event.idHex)
+            is com.vitorpamplona.quartz.nip01Core.core.Event -> deletedEvents.contains(event.id)
+            else -> false
+        }
+
+    fun markAsDeleted(eventId: HexKey) {
+        deletedEvents.add(eventId)
+    }
+
+    // ----- Event stream -----
+
+    override fun getEventStream(): ICacheEventStream = eventStream
+
+    /**
+     * Emits a new note bundle to observers.
+     */
+    suspend fun emitNewNotes(notes: Set<Note>) {
+        eventStream.emitNewNotes(notes)
+    }
+
+    /**
+     * Emits deleted notes to observers.
+     */
+    suspend fun emitDeletedNotes(notes: Set<Note>) {
+        eventStream.emitDeletedNotes(notes)
+    }
+
+    // ----- Stats -----
+
+    fun userCount(): Int = users.size
+
+    fun noteCount(): Int = notes.size
+
+    fun clear() {
+        users.clear()
+        notes.clear()
+        deletedEvents.clear()
+    }
+}
+
+/**
+ * Desktop implementation of ICacheEventStream.
+ */
+class DesktopCacheEventStream : ICacheEventStream {
+    private val _newEventBundles = MutableSharedFlow<Set<Note>>(replay = 0)
+    private val _deletedEventBundles = MutableSharedFlow<Set<Note>>(replay = 0)
+
+    override val newEventBundles: SharedFlow<Set<Note>> = _newEventBundles
+    override val deletedEventBundles: SharedFlow<Set<Note>> = _deletedEventBundles
+
+    suspend fun emitNewNotes(notes: Set<Note>) {
+        _newEventBundles.emit(notes)
+    }
+
+    suspend fun emitDeletedNotes(notes: Set<Note>) {
+        _deletedEventBundles.emit(notes)
+    }
+}

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/nwc/NwcPaymentHandler.kt

@@ -0,0 +1,181 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.desktop.nwc
+
+import com.vitorpamplona.amethyst.commons.model.Note
+import com.vitorpamplona.amethyst.desktop.cache.DesktopLocalCache
+import com.vitorpamplona.amethyst.desktop.network.DesktopRelayConnectionManager
+import com.vitorpamplona.quartz.nip01Core.core.hexToByteArray
+import com.vitorpamplona.quartz.nip01Core.crypto.KeyPair
+import com.vitorpamplona.quartz.nip01Core.relay.filters.Filter
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSignerInternal
+import com.vitorpamplona.quartz.nip47WalletConnect.LnZapPaymentRequestEvent
+import com.vitorpamplona.quartz.nip47WalletConnect.LnZapPaymentResponseEvent
+import com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect
+import com.vitorpamplona.quartz.nip47WalletConnect.PayInvoiceErrorResponse
+import com.vitorpamplona.quartz.nip47WalletConnect.PayInvoiceSuccessResponse
+import com.vitorpamplona.quartz.nip47WalletConnect.Response
+import kotlinx.coroutines.suspendCancellableCoroutine
+import kotlinx.coroutines.withTimeoutOrNull
+import kotlin.coroutines.resume
+
+/**
+ * Handles NIP-47 (Nostr Wallet Connect) payments for desktop.
+ *
+ * Flow:
+ * 1. Create payment request event with BOLT11 invoice
+ * 2. Register with tracker for persistent tracking in Note.zapPayments
+ * 3. Send to wallet's relay
+ * 4. Subscribe and wait for wallet response
+ *
+ * @param relayManager Manages relay connections for sending/subscribing
+ * @param localCache Cache for persistent payment tracking
+ */
+class NwcPaymentHandler(
+    private val relayManager: DesktopRelayConnectionManager,
+    private val localCache: DesktopLocalCache,
+) {
+    sealed class PaymentResult {
+        data class Success(
+            val preimage: String?,
+        ) : PaymentResult()
+
+        data class Error(
+            val message: String,
+        ) : PaymentResult()
+
+        data object Timeout : PaymentResult()
+    }
+
+    /**
+     * Sends a payment request via NWC and waits for response.
+     * Payment is tracked in Note.zapPayments for the zapped note.
+     *
+     * @param bolt11 The BOLT11 invoice to pay
+     * @param nwcConnection The NWC connection details (pubkey, relay, secret)
+     * @param zappedNote The note being zapped (for tracking in Note.zapPayments)
+     * @param timeoutMs How long to wait for payment response (default 60s)
+     * @return PaymentResult indicating success, error, or timeout
+     */
+    suspend fun payInvoice(
+        bolt11: String,
+        nwcConnection: Nip47WalletConnect.Nip47URINorm,
+        zappedNote: Note? = null,
+        timeoutMs: Long = 60_000,
+    ): PaymentResult {
+        val secret = nwcConnection.secret ?: return PaymentResult.Error("NWC connection has no secret")
+
+        // Create signer from NWC secret
+        val nwcSigner = NostrSignerInternal(KeyPair(secret.hexToByteArray()))
+
+        // Create payment request event
+        val requestEvent =
+            LnZapPaymentRequestEvent.create(
+                lnInvoice = bolt11,
+                walletServicePubkey = nwcConnection.pubKeyHex,
+                signer = nwcSigner,
+            )
+
+        // Register request note in cache for tracking
+        val requestNote = localCache.getOrCreateNote(requestEvent.id)
+        requestNote.loadEvent(requestEvent, localCache.getOrCreateUser(requestEvent.pubKey), emptyList())
+        requestNote.addRelay(nwcConnection.relayUri)
+
+        // Link to zapped note for persistent tracking
+        zappedNote?.addZapPayment(requestNote, null)
+
+        // Send request to wallet's relay
+        relayManager.sendToRelay(nwcConnection.relayUri, requestEvent)
+
+        // Subscribe and wait for response with timeout
+        return withTimeoutOrNull(timeoutMs) {
+            waitForResponse(requestEvent.id, nwcConnection, nwcSigner, zappedNote, requestNote)
+        } ?: PaymentResult.Timeout
+    }
+
+    private suspend fun waitForResponse(
+        requestId: String,
+        nwcConnection: Nip47WalletConnect.Nip47URINorm,
+        nwcSigner: NostrSignerInternal,
+        zappedNote: Note?,
+        requestNote: Note,
+    ): PaymentResult =
+        suspendCancellableCoroutine { continuation ->
+            val filter =
+                Filter(
+                    kinds = listOf(LnZapPaymentResponseEvent.KIND),
+                    authors = listOf(nwcConnection.pubKeyHex),
+                    tags = mapOf("e" to listOf(requestId)),
+                )
+
+            val subId = "nwc-response-${requestId.take(8)}"
+
+            relayManager.subscribeOnRelay(
+                relay = nwcConnection.relayUri,
+                subId = subId,
+                filters = listOf(filter),
+                onEvent = { event, relay ->
+                    if (event is LnZapPaymentResponseEvent && event.requestId() == requestId) {
+                        // Unsubscribe
+                        relayManager.closeSubscription(nwcConnection.relayUri, subId)
+
+                        // Store response note and link to zapped note
+                        val responseNote = localCache.getOrCreateNote(event.id)
+                        responseNote.loadEvent(event, localCache.getOrCreateUser(event.pubKey), emptyList())
+                        responseNote.addRelay(relay)
+                        zappedNote?.addZapPayment(requestNote, responseNote)
+
+                        // Decrypt and process response
+                        try {
+                            kotlinx.coroutines.runBlocking {
+                                val response = event.decrypt(nwcSigner)
+                                val result = processResponse(response)
+                                if (continuation.isActive) {
+                                    continuation.resume(result)
+                                }
+                            }
+                        } catch (e: Exception) {
+                            if (continuation.isActive) {
+                                continuation.resume(PaymentResult.Error("Failed to decrypt response: ${e.message}"))
+                            }
+                        }
+                    }
+                },
+            )
+
+            continuation.invokeOnCancellation {
+                relayManager.closeSubscription(nwcConnection.relayUri, subId)
+            }
+        }
+
+    private fun processResponse(response: Response): PaymentResult =
+        when (response) {
+            is PayInvoiceSuccessResponse -> {
+                PaymentResult.Success(response.result?.preimage)
+            }
+            is PayInvoiceErrorResponse -> {
+                PaymentResult.Error(response.error?.message ?: "Unknown error")
+            }
+            else -> {
+                PaymentResult.Error("Unexpected response type: ${response.resultType}")
+            }
+        }
+}

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

@@ -0,0 +1,336 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.desktop.ui
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+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
+import com.vitorpamplona.amethyst.commons.account.AccountState
+import com.vitorpamplona.amethyst.commons.state.EventCollectionState
+import com.vitorpamplona.amethyst.commons.subscriptions.FilterBuilders
+import com.vitorpamplona.amethyst.commons.subscriptions.SubscriptionConfig
+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
+import com.vitorpamplona.amethyst.desktop.cache.DesktopLocalCache
+import com.vitorpamplona.amethyst.desktop.network.DesktopRelayConnectionManager
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip51Lists.bookmarkList.BookmarkListEvent
+import com.vitorpamplona.quartz.nip51Lists.bookmarkList.tags.EventBookmark
+import kotlinx.coroutines.launch
+
+private enum class BookmarkTab { PUBLIC, PRIVATE }
+
+/**
+ * Screen displaying user's bookmarked notes (public and private).
+ */
+@Composable
+fun BookmarksScreen(
+    relayManager: DesktopRelayConnectionManager,
+    localCache: DesktopLocalCache,
+    account: AccountState.LoggedIn,
+    nwcConnection: com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect.Nip47URINorm? = null,
+    onNavigateToProfile: (String) -> Unit = {},
+    onNavigateToThread: (String) -> Unit = {},
+    onZapFeedback: (ZapFeedback) -> Unit = {},
+) {
+    val relayStatuses by relayManager.relayStatuses.collectAsState()
+    val scope = rememberCoroutineScope()
+
+    // Tab state
+    var selectedTab by remember { mutableStateOf(BookmarkTab.PUBLIC) }
+
+    // State for bookmark list
+    var bookmarkList by remember { mutableStateOf<BookmarkListEvent?>(null) }
+    var publicBookmarkIds by remember { mutableStateOf<List<String>>(emptyList()) }
+    var privateBookmarkIds by remember { mutableStateOf<List<String>>(emptyList()) }
+    var isLoading by remember { mutableStateOf(true) }
+    var hasReceivedEose by remember { mutableStateOf(false) }
+
+    // State for fetched bookmark events
+    val publicEventState =
+        remember(account.pubKeyHex) {
+            EventCollectionState<Event>(
+                getId = { it.id },
+                maxSize = 100,
+                scope = scope,
+            )
+        }
+    val publicEvents by publicEventState.items.collectAsState()
+
+    val privateEventState =
+        remember(account.pubKeyHex) {
+            EventCollectionState<Event>(
+                getId = { it.id },
+                maxSize = 100,
+                scope = scope,
+            )
+        }
+    val privateEvents by privateEventState.items.collectAsState()
+
+    // Subscribe to user's bookmark list (kind 30001)
+    rememberSubscription(relayStatuses, account.pubKeyHex, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isNotEmpty()) {
+            SubscriptionConfig(
+                subId = "bookmarks-list-${account.pubKeyHex.take(8)}",
+                filters =
+                    listOf(
+                        FilterBuilders.byAuthors(
+                            authors = listOf(account.pubKeyHex),
+                            kinds = listOf(BookmarkListEvent.KIND),
+                            limit = 1,
+                        ),
+                    ),
+                relays = configuredRelays,
+                onEvent = { event, _, _, _ ->
+                    if (event is BookmarkListEvent) {
+                        bookmarkList = event
+                        // Extract public bookmarked event IDs
+                        val pubIds =
+                            event
+                                .publicBookmarks()
+                                .filterIsInstance<EventBookmark>()
+                                .map { it.eventId }
+                        publicBookmarkIds = pubIds
+                    }
+                },
+                onEose = { _, _ ->
+                    hasReceivedEose = true
+                    isLoading = false
+                },
+            )
+        } else {
+            isLoading = false
+            null
+        }
+    }
+
+    // Decrypt private bookmarks when bookmark list changes
+    LaunchedEffect(bookmarkList) {
+        bookmarkList?.let { list ->
+            scope.launch {
+                try {
+                    val privateBookmarks = list.privateBookmarks(account.signer)
+                    val privIds =
+                        privateBookmarks
+                            ?.filterIsInstance<EventBookmark>()
+                            ?.map { it.eventId }
+                            ?: emptyList()
+                    privateBookmarkIds = privIds
+                } catch (e: Exception) {
+                    println("Failed to decrypt private bookmarks: ${e.message}")
+                    privateBookmarkIds = emptyList()
+                }
+            }
+        }
+    }
+
+    // Subscribe to fetch the actual public bookmarked events
+    rememberSubscription(relayStatuses, publicBookmarkIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isNotEmpty() && publicBookmarkIds.isNotEmpty()) {
+            publicEventState.clear()
+            SubscriptionConfig(
+                subId = "public-bookmarked-events-${System.currentTimeMillis()}",
+                filters =
+                    listOf(
+                        FilterBuilders.byIds(publicBookmarkIds),
+                    ),
+                relays = configuredRelays,
+                onEvent = { event, _, _, _ ->
+                    publicEventState.addItem(event)
+                },
+                onEose = { _, _ -> },
+            )
+        } else {
+            null
+        }
+    }
+
+    // Subscribe to fetch the actual private bookmarked events
+    rememberSubscription(relayStatuses, privateBookmarkIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isNotEmpty() && privateBookmarkIds.isNotEmpty()) {
+            privateEventState.clear()
+            SubscriptionConfig(
+                subId = "private-bookmarked-events-${System.currentTimeMillis()}",
+                filters =
+                    listOf(
+                        FilterBuilders.byIds(privateBookmarkIds),
+                    ),
+                relays = configuredRelays,
+                onEvent = { event, _, _, _ ->
+                    privateEventState.addItem(event)
+                },
+                onEose = { _, _ -> },
+            )
+        } else {
+            null
+        }
+    }
+
+    val currentEvents = if (selectedTab == BookmarkTab.PUBLIC) publicEvents else privateEvents
+    val currentBookmarkIds = if (selectedTab == BookmarkTab.PUBLIC) publicBookmarkIds else privateBookmarkIds
+
+    Column(modifier = Modifier.fillMaxSize()) {
+        // Header with tabs
+        Row(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .padding(16.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Text(
+                text = "Bookmarks",
+                style = MaterialTheme.typography.headlineMedium,
+                color = MaterialTheme.colorScheme.onBackground,
+            )
+
+            Spacer(Modifier.weight(1f))
+
+            // Tab selector
+            Row(
+                horizontalArrangement =
+                    androidx.compose.foundation.layout.Arrangement
+                        .spacedBy(8.dp),
+            ) {
+                FilterChip(
+                    selected = selectedTab == BookmarkTab.PUBLIC,
+                    onClick = { selectedTab = BookmarkTab.PUBLIC },
+                    label = { Text("Public (${publicBookmarkIds.size})") },
+                )
+                FilterChip(
+                    selected = selectedTab == BookmarkTab.PRIVATE,
+                    onClick = { selectedTab = BookmarkTab.PRIVATE },
+                    label = { Text("Private (${privateBookmarkIds.size})") },
+                )
+            }
+        }
+
+        // Content
+        when {
+            isLoading && !hasReceivedEose -> {
+                LoadingState(message = "Loading bookmarks...")
+            }
+            currentBookmarkIds.isEmpty() && hasReceivedEose -> {
+                EmptyState(
+                    title = if (selectedTab == BookmarkTab.PUBLIC) "No public bookmarks" else "No private bookmarks",
+                    description =
+                        if (selectedTab == BookmarkTab.PUBLIC) {
+                            "Bookmark notes publicly to save them here"
+                        } else {
+                            "Private bookmarks are encrypted and only visible to you"
+                        },
+                )
+            }
+            else -> {
+                LazyColumn(
+                    modifier = Modifier.fillMaxSize(),
+                ) {
+                    items(currentEvents, key = { it.id }) { event ->
+                        Column(
+                            modifier =
+                                Modifier.clickable {
+                                    onNavigateToThread(event.id)
+                                },
+                        ) {
+                            NoteCard(
+                                note = event.toNoteDisplayData(localCache),
+                                onAuthorClick = onNavigateToProfile,
+                            )
+                            NoteActionsRow(
+                                event = event,
+                                relayManager = relayManager,
+                                localCache = localCache,
+                                account = account,
+                                nwcConnection = nwcConnection,
+                                onReplyClick = { onNavigateToThread(event.id) },
+                                onZapFeedback = onZapFeedback,
+                                modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),
+                                isBookmarked = true,
+                                bookmarkList = bookmarkList,
+                                onBookmarkChanged = { newList ->
+                                    bookmarkList = newList
+                                    // Update public bookmark IDs
+                                    val pubIds =
+                                        newList
+                                            .publicBookmarks()
+                                            .filterIsInstance<EventBookmark>()
+                                            .map { it.eventId }
+                                    publicBookmarkIds = pubIds
+
+                                    // Decrypt and update private bookmark IDs
+                                    scope.launch {
+                                        try {
+                                            val privateBookmarks = newList.privateBookmarks(account.signer)
+                                            val privIds =
+                                                privateBookmarks
+                                                    ?.filterIsInstance<EventBookmark>()
+                                                    ?.map { it.eventId }
+                                                    ?: emptyList()
+                                            privateBookmarkIds = privIds
+                                        } catch (e: Exception) {
+                                            // Keep existing private IDs if decryption fails
+                                        }
+                                    }
+
+                                    // Remove unbookmarked event from appropriate list
+                                    if (!pubIds.contains(event.id)) {
+                                        publicEventState.removeItem(event.id)
+                                    }
+                                    if (!privateBookmarkIds.contains(event.id)) {
+                                        privateEventState.removeItem(event.id)
+                                    }
+                                },
+                            )
+                        }
+                        HorizontalDivider(thickness = 1.dp)
+                    }
+                }
+            }
+        }
+    }
+}

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

@@ -55,17 +55,30 @@ import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.commons.account.AccountState
 import com.vitorpamplona.amethyst.commons.state.EventCollectionState
 import com.vitorpamplona.amethyst.commons.subscriptions.FeedMode
+import com.vitorpamplona.amethyst.commons.subscriptions.FilterBuilders
+import com.vitorpamplona.amethyst.commons.subscriptions.createBatchMetadataSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.createContactListSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.createFollowingFeedSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.createGlobalFeedSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createReactionsSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createRepliesSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createRepostsSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createZapsSubscription
 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
+import com.vitorpamplona.amethyst.desktop.DesktopPreferences
+import com.vitorpamplona.amethyst.desktop.cache.DesktopLocalCache
 import com.vitorpamplona.amethyst.desktop.network.DesktopRelayConnectionManager
 import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
 import com.vitorpamplona.quartz.nip02FollowList.ContactListEvent
+import com.vitorpamplona.quartz.nip18Reposts.RepostEvent
+import com.vitorpamplona.quartz.nip25Reactions.ReactionEvent
+import com.vitorpamplona.quartz.nip51Lists.bookmarkList.BookmarkListEvent
+import com.vitorpamplona.quartz.nip57Zaps.LnZapEvent
 
 /**
  * Note card with action buttons.
@@ -74,11 +87,23 @@ import com.vitorpamplona.quartz.nip02FollowList.ContactListEvent
 fun FeedNoteCard(
     event: Event,
     relayManager: DesktopRelayConnectionManager,
+    localCache: DesktopLocalCache,
     account: AccountState.LoggedIn?,
+    nwcConnection: com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect.Nip47URINorm? = null,
     onReply: () -> Unit,
+    onZapFeedback: (ZapFeedback) -> Unit,
     onNavigateToProfile: (String) -> Unit = {},
     onNavigateToThread: (String) -> Unit = {},
+    zapReceipts: List<ZapReceipt> = emptyList(),
+    reactionCount: Int = 0,
+    replyCount: Int = 0,
+    repostCount: Int = 0,
+    bookmarkList: BookmarkListEvent? = null,
+    isBookmarked: Boolean = false,
+    onBookmarkChanged: (BookmarkListEvent) -> Unit = {},
 ) {
+    val zapAmountSats = zapReceipts.sumOf { it.amountSats }
+
     Column(
         modifier =
             Modifier.clickable {
@@ -86,7 +111,7 @@ fun FeedNoteCard(
             },
     ) {
         NoteCard(
-            note = event.toNoteDisplayData(),
+            note = event.toNoteDisplayData(localCache),
             onAuthorClick = onNavigateToProfile,
         )
 
@@ -95,9 +120,21 @@ fun FeedNoteCard(
             NoteActionsRow(
                 event = event,
                 relayManager = relayManager,
+                localCache = localCache,
                 account = account,
+                nwcConnection = nwcConnection,
                 onReplyClick = onReply,
+                onZapFeedback = onZapFeedback,
                 modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),
+                zapCount = zapReceipts.size,
+                zapAmountSats = zapAmountSats,
+                zapReceipts = zapReceipts,
+                reactionCount = reactionCount,
+                replyCount = replyCount,
+                repostCount = repostCount,
+                bookmarkList = bookmarkList,
+                isBookmarked = isBookmarked,
+                onBookmarkChanged = onBookmarkChanged,
             )
         }
     }
@@ -106,10 +143,13 @@ fun FeedNoteCard(
 @Composable
 fun FeedScreen(
     relayManager: DesktopRelayConnectionManager,
+    localCache: DesktopLocalCache,
     account: AccountState.LoggedIn? = null,
+    nwcConnection: com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect.Nip47URINorm? = null,
     onCompose: () -> Unit = {},
     onNavigateToProfile: (String) -> Unit = {},
     onNavigateToThread: (String) -> Unit = {},
+    onZapFeedback: (ZapFeedback) -> Unit = {},
 ) {
     val connectedRelays by relayManager.connectedRelays.collectAsState()
     val relayStatuses by relayManager.relayStatuses.collectAsState()
@@ -125,8 +165,14 @@ fun FeedScreen(
         }
     val events by eventState.items.collectAsState()
     var replyToEvent by remember { mutableStateOf<Event?>(null) }
-    var feedMode by remember { mutableStateOf(FeedMode.GLOBAL) }
+    var feedMode by remember { mutableStateOf(DesktopPreferences.feedMode) }
     var followedUsers by remember { mutableStateOf<Set<String>>(emptySet()) }
+    var zapsByEvent by remember { mutableStateOf<Map<String, List<ZapReceipt>>>(emptyMap()) }
+    var reactionsByEvent by remember { mutableStateOf<Map<String, Int>>(emptyMap()) }
+    var repliesByEvent by remember { mutableStateOf<Map<String, Int>>(emptyMap()) }
+    var repostsByEvent by remember { mutableStateOf<Map<String, Int>>(emptyMap()) }
+    var bookmarkList by remember { mutableStateOf<BookmarkListEvent?>(null) }
+    var bookmarkedEventIds by remember { mutableStateOf<Set<String>>(emptySet()) }
 
     // Track EOSE to know when initial load is complete
     var eoseReceivedCount by remember { mutableStateOf(0) }
@@ -150,6 +196,41 @@ fun FeedScreen(
         }
     }
 
+    // Load user's bookmark list
+    rememberSubscription(relayStatuses, account, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isNotEmpty() && account != null) {
+            com.vitorpamplona.amethyst.commons.subscriptions.SubscriptionConfig(
+                subId = "bookmarks-${account.pubKeyHex.take(8)}",
+                filters =
+                    listOf(
+                        FilterBuilders.byAuthors(
+                            authors = listOf(account.pubKeyHex),
+                            kinds = listOf(BookmarkListEvent.KIND),
+                            limit = 1,
+                        ),
+                    ),
+                relays = configuredRelays,
+                onEvent = { event, _, _, _ ->
+                    if (event is BookmarkListEvent) {
+                        bookmarkList = event
+                        // Extract public bookmarked event IDs
+                        val pubIds =
+                            event
+                                .publicBookmarks()
+                                .filterIsInstance<com.vitorpamplona.quartz.nip51Lists.bookmarkList.tags.EventBookmark>()
+                                .map { it.eventId }
+                                .toSet()
+                        bookmarkedEventIds = pubIds
+                    }
+                },
+                onEose = { _, _ -> },
+            )
+        } else {
+            null
+        }
+    }
+
     // Clear events and reset EOSE when feed mode changes
     remember(feedMode) {
         eventState.clear()
@@ -168,6 +249,10 @@ fun FeedScreen(
                 createGlobalFeedSubscription(
                     relays = configuredRelays,
                     onEvent = { event, _, _, _ ->
+                        // Store metadata events in cache
+                        if (event is MetadataEvent) {
+                            localCache.consumeMetadata(event)
+                        }
                         eventState.addItem(event)
                     },
                     onEose = { _, _ ->
@@ -181,6 +266,10 @@ fun FeedScreen(
                         relays = configuredRelays,
                         followedUsers = followedUsers.toList(),
                         onEvent = { event, _, _, _ ->
+                            // Store metadata events in cache
+                            if (event is MetadataEvent) {
+                                localCache.consumeMetadata(event)
+                            }
                             eventState.addItem(event)
                         },
                         onEose = { _, _ ->
@@ -194,6 +283,164 @@ fun FeedScreen(
         }
     }
 
+    // Subscribe to zaps for visible events
+    val eventIds = events.map { it.id }
+    rememberSubscription(relayStatuses, eventIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || eventIds.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createZapsSubscription(
+            relays = configuredRelays,
+            eventIds = eventIds,
+            onEvent = { event, _, _, _ ->
+                if (event is LnZapEvent) {
+                    val receipt = event.toZapReceipt(localCache) ?: return@createZapsSubscription
+                    val targetEventId = event.zappedPost().firstOrNull() ?: return@createZapsSubscription
+                    zapsByEvent =
+                        zapsByEvent.toMutableMap().apply {
+                            val existing = this[targetEventId] ?: emptyList()
+                            if (existing.none { it.createdAt == receipt.createdAt && it.senderPubKey == receipt.senderPubKey }) {
+                                this[targetEventId] = existing + receipt
+                            }
+                        }
+                }
+            },
+        )
+    }
+
+    // Subscribe to metadata for zap senders (to show display names)
+    val zapSenderPubkeys =
+        zapsByEvent.values
+            .flatten()
+            .map { it.senderPubKey }
+            .distinct()
+    rememberSubscription(relayStatuses, zapSenderPubkeys, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || zapSenderPubkeys.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        // Only fetch metadata for users we don't have yet
+        val missingPubkeys =
+            zapSenderPubkeys.filter { pubkey ->
+                localCache.getUserIfExists(pubkey)?.info == null
+            }
+        if (missingPubkeys.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createBatchMetadataSubscription(
+            relays = configuredRelays,
+            pubKeyHexList = missingPubkeys,
+            onEvent = { event, _, _, _ ->
+                if (event is MetadataEvent) {
+                    localCache.consumeMetadata(event)
+                }
+            },
+        )
+    }
+
+    // Subscribe to reactions for visible events
+    rememberSubscription(relayStatuses, eventIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || eventIds.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createReactionsSubscription(
+            relays = configuredRelays,
+            eventIds = eventIds,
+            onEvent = { event, _, _, _ ->
+                if (event is ReactionEvent) {
+                    val targetEventId = event.originalPost().firstOrNull() ?: return@createReactionsSubscription
+                    reactionsByEvent =
+                        reactionsByEvent.toMutableMap().apply {
+                            this[targetEventId] = (this[targetEventId] ?: 0) + 1
+                        }
+                }
+            },
+        )
+    }
+
+    // Subscribe to replies for visible events
+    rememberSubscription(relayStatuses, eventIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || eventIds.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createRepliesSubscription(
+            relays = configuredRelays,
+            eventIds = eventIds,
+            onEvent = { event, _, _, _ ->
+                // Find the event this is replying to
+                val replyToId =
+                    event.tags
+                        .filter { it.size >= 2 && it[0] == "e" }
+                        .lastOrNull()
+                        ?.get(1) ?: return@createRepliesSubscription
+                if (replyToId in eventIds) {
+                    repliesByEvent =
+                        repliesByEvent.toMutableMap().apply {
+                            this[replyToId] = (this[replyToId] ?: 0) + 1
+                        }
+                }
+            },
+        )
+    }
+
+    // Subscribe to reposts for visible events
+    rememberSubscription(relayStatuses, eventIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || eventIds.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createRepostsSubscription(
+            relays = configuredRelays,
+            eventIds = eventIds,
+            onEvent = { event, _, _, _ ->
+                if (event is RepostEvent) {
+                    val targetEventId = event.boostedEventId() ?: return@createRepostsSubscription
+                    repostsByEvent =
+                        repostsByEvent.toMutableMap().apply {
+                            this[targetEventId] = (this[targetEventId] ?: 0) + 1
+                        }
+                }
+            },
+        )
+    }
+
+    // Subscribe to metadata for note authors (to enable zaps and populate search cache)
+    val authorPubkeys = events.map { it.pubKey }.distinct()
+    rememberSubscription(relayStatuses, authorPubkeys, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || authorPubkeys.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        // Only fetch metadata for users we don't have yet
+        val missingPubkeys =
+            authorPubkeys.filter { pubkey ->
+                localCache.getUserIfExists(pubkey)?.info == null
+            }
+        if (missingPubkeys.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createBatchMetadataSubscription(
+            relays = configuredRelays,
+            pubKeyHexList = missingPubkeys,
+            onEvent = { event, _, _, _ ->
+                if (event is MetadataEvent) {
+                    localCache.consumeMetadata(event)
+                }
+            },
+        )
+    }
+
     Column(modifier = Modifier.fillMaxSize()) {
         // Header with compose button
         Row(
@@ -217,12 +464,18 @@ fun FeedScreen(
                         Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
                             FilterChip(
                                 selected = feedMode == FeedMode.GLOBAL,
-                                onClick = { feedMode = FeedMode.GLOBAL },
+                                onClick = {
+                                    feedMode = FeedMode.GLOBAL
+                                    DesktopPreferences.feedMode = FeedMode.GLOBAL
+                                },
                                 label = { Text("Global") },
                             )
                             FilterChip(
                                 selected = feedMode == FeedMode.FOLLOWING,
-                                onClick = { feedMode = FeedMode.FOLLOWING },
+                                onClick = {
+                                    feedMode = FeedMode.FOLLOWING
+                                    DesktopPreferences.feedMode = FeedMode.FOLLOWING
+                                },
                                 label = { Text("Following") },
                             )
                         }
@@ -301,10 +554,29 @@ fun FeedScreen(
                     FeedNoteCard(
                         event = event,
                         relayManager = relayManager,
+                        localCache = localCache,
                         account = account,
+                        nwcConnection = nwcConnection,
                         onReply = { replyToEvent = event },
+                        onZapFeedback = onZapFeedback,
                         onNavigateToProfile = onNavigateToProfile,
                         onNavigateToThread = onNavigateToThread,
+                        zapReceipts = zapsByEvent[event.id] ?: emptyList(),
+                        reactionCount = reactionsByEvent[event.id] ?: 0,
+                        replyCount = repliesByEvent[event.id] ?: 0,
+                        repostCount = repostsByEvent[event.id] ?: 0,
+                        bookmarkList = bookmarkList,
+                        isBookmarked = bookmarkedEventIds.contains(event.id),
+                        onBookmarkChanged = { newList ->
+                            bookmarkList = newList
+                            val pubIds =
+                                newList
+                                    .publicBookmarks()
+                                    .filterIsInstance<com.vitorpamplona.quartz.nip51Lists.bookmarkList.tags.EventBookmark>()
+                                    .map { it.eventId }
+                                    .toSet()
+                            bookmarkedEventIds = pubIds
+                        },
                     )
                 }
             }

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

@@ -0,0 +1,364 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+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.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+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.material.icons.Icons
+import androidx.compose.material.icons.filled.Refresh
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.FilterChip
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+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.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.commons.account.AccountState
+import com.vitorpamplona.amethyst.commons.state.EventCollectionState
+import com.vitorpamplona.amethyst.commons.subscriptions.FeedMode
+import com.vitorpamplona.amethyst.commons.subscriptions.createContactListSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createFollowingLongFormFeedSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createLongFormFeedSubscription
+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.desktop.cache.DesktopLocalCache
+import com.vitorpamplona.amethyst.desktop.network.DesktopRelayConnectionManager
+import com.vitorpamplona.quartz.nip02FollowList.ContactListEvent
+import com.vitorpamplona.quartz.nip23LongContent.LongTextNoteEvent
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+
+private val dateFormat = SimpleDateFormat("MMM d, yyyy", Locale.getDefault())
+
+private fun formatDate(timestamp: Long): String = dateFormat.format(Date(timestamp * 1000))
+
+/**
+ * Card displaying long-form content (NIP-23) with title, summary, and image.
+ */
+@Composable
+fun LongFormCard(
+    event: LongTextNoteEvent,
+    localCache: DesktopLocalCache,
+    onAuthorClick: (String) -> Unit = {},
+    onClick: () -> Unit = {},
+) {
+    val author = localCache.getUserIfExists(event.pubKey)
+    val authorName = author?.info?.bestName() ?: event.pubKey.take(8)
+    val publishedAt = event.publishedAt() ?: event.createdAt
+
+    Card(
+        modifier =
+            Modifier
+                .fillMaxWidth()
+                .clickable(onClick = onClick),
+        colors =
+            CardDefaults.cardColors(
+                containerColor = MaterialTheme.colorScheme.surface,
+            ),
+        elevation = CardDefaults.cardElevation(defaultElevation = 1.dp),
+    ) {
+        Column(modifier = Modifier.padding(16.dp)) {
+            // Title
+            event.title()?.let { title ->
+                Text(
+                    text = title,
+                    style = MaterialTheme.typography.titleMedium,
+                    color = MaterialTheme.colorScheme.onSurface,
+                    maxLines = 2,
+                    overflow = TextOverflow.Ellipsis,
+                )
+                Spacer(Modifier.height(8.dp))
+            }
+
+            // Summary
+            event.summary()?.let { summary ->
+                Text(
+                    text = summary,
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    maxLines = 3,
+                    overflow = TextOverflow.Ellipsis,
+                )
+                Spacer(Modifier.height(12.dp))
+            }
+
+            // Footer with author and date
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween,
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Text(
+                    text = authorName,
+                    style = MaterialTheme.typography.labelMedium,
+                    color = MaterialTheme.colorScheme.primary,
+                    modifier = Modifier.clickable { onAuthorClick(event.pubKey) },
+                )
+
+                Text(
+                    text = formatDate(publishedAt),
+                    style = MaterialTheme.typography.labelSmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+
+            // Topics/hashtags
+            val topics = event.topics()
+            if (topics.isNotEmpty()) {
+                Spacer(Modifier.height(8.dp))
+                Row(
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                ) {
+                    topics.take(3).forEach { topic ->
+                        Text(
+                            text = "#$topic",
+                            style = MaterialTheme.typography.labelSmall,
+                            color = MaterialTheme.colorScheme.tertiary,
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun ReadsScreen(
+    relayManager: DesktopRelayConnectionManager,
+    localCache: DesktopLocalCache,
+    account: AccountState.LoggedIn? = null,
+    onNavigateToProfile: (String) -> Unit = {},
+    onNavigateToArticle: (String) -> Unit = {},
+) {
+    val connectedRelays by relayManager.connectedRelays.collectAsState()
+    val relayStatuses by relayManager.relayStatuses.collectAsState()
+    val scope = rememberCoroutineScope()
+
+    val eventState =
+        remember {
+            EventCollectionState<LongTextNoteEvent>(
+                getId = { it.id },
+                sortComparator = compareByDescending { it.publishedAt() ?: it.createdAt },
+                maxSize = 100,
+                scope = scope,
+            )
+        }
+    val events by eventState.items.collectAsState()
+
+    var feedMode by remember { mutableStateOf(FeedMode.GLOBAL) }
+    var followedUsers by remember { mutableStateOf<Set<String>>(emptySet()) }
+    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
+        if (configuredRelays.isNotEmpty() && account != null && feedMode == FeedMode.FOLLOWING) {
+            createContactListSubscription(
+                relays = configuredRelays,
+                pubKeyHex = account.pubKeyHex,
+                onEvent = { event, _, _, _ ->
+                    if (event is ContactListEvent) {
+                        followedUsers = event.verifiedFollowKeySet()
+                    }
+                },
+            )
+        } else {
+            null
+        }
+    }
+
+    // Clear events when feed mode changes
+    remember(feedMode) {
+        eventState.clear()
+        eoseReceivedCount = 0
+    }
+
+    // Subscribe to long-form content feed
+    rememberSubscription(relayStatuses, feedMode, followedUsers, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        when (feedMode) {
+            FeedMode.GLOBAL -> {
+                createLongFormFeedSubscription(
+                    relays = configuredRelays,
+                    onEvent = { event, _, _, _ ->
+                        if (event is LongTextNoteEvent) {
+                            eventState.addItem(event)
+                        }
+                    },
+                    onEose = { _, _ ->
+                        eoseReceivedCount++
+                    },
+                )
+            }
+            FeedMode.FOLLOWING -> {
+                if (followedUsers.isNotEmpty()) {
+                    createFollowingLongFormFeedSubscription(
+                        relays = configuredRelays,
+                        followedUsers = followedUsers.toList(),
+                        onEvent = { event, _, _, _ ->
+                            if (event is LongTextNoteEvent) {
+                                eventState.addItem(event)
+                            }
+                        },
+                        onEose = { _, _ ->
+                            eoseReceivedCount++
+                        },
+                    )
+                } else {
+                    null
+                }
+            }
+        }
+    }
+
+    Column(modifier = Modifier.fillMaxSize()) {
+        // Header
+        Row(
+            modifier = Modifier.fillMaxWidth().padding(bottom = 16.dp),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Column {
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                ) {
+                    Text(
+                        "Reads",
+                        style = MaterialTheme.typography.headlineMedium,
+                        color = MaterialTheme.colorScheme.onBackground,
+                    )
+
+                    // 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") },
+                            )
+                        }
+                    }
+                }
+
+                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(
+                            Icons.Default.Refresh,
+                            contentDescription = "Refresh",
+                            tint = MaterialTheme.colorScheme.primary,
+                            modifier = Modifier.size(18.dp),
+                        )
+                    }
+                }
+            }
+        }
+
+        Spacer(Modifier.height(8.dp))
+
+        when {
+            connectedRelays.isEmpty() -> {
+                LoadingState("Connecting to relays...")
+            }
+            feedMode == FeedMode.FOLLOWING && followedUsers.isEmpty() -> {
+                LoadingState("Loading followed users...")
+            }
+            events.isEmpty() && !initialLoadComplete -> {
+                LoadingState("Loading articles...")
+            }
+            events.isEmpty() && initialLoadComplete -> {
+                EmptyState(
+                    title =
+                        if (feedMode == FeedMode.FOLLOWING) {
+                            "No articles from followed users"
+                        } else {
+                            "No articles found"
+                        },
+                    description =
+                        if (feedMode == FeedMode.FOLLOWING) {
+                            "Long-form articles from people you follow will appear here"
+                        } else {
+                            "Long-form articles from the network will appear here"
+                        },
+                    onRefresh = { relayManager.connect() },
+                )
+            }
+            else -> {
+                LazyColumn(
+                    verticalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    items(events, key = { it.id }) { event ->
+                        LongFormCard(
+                            event = event,
+                            localCache = localCache,
+                            onAuthorClick = onNavigateToProfile,
+                            onClick = { onNavigateToArticle(event.id) },
+                        )
+                    }
+                }
+            }
+        }
+    }
+}

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

@@ -0,0 +1,451 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+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.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+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.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowForward
+import androidx.compose.material.icons.filled.Clear
+import androidx.compose.material.icons.filled.Description
+import androidx.compose.material.icons.filled.Person
+import androidx.compose.material.icons.filled.Search
+import androidx.compose.material.icons.filled.Tag
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.commons.search.SearchResult
+import com.vitorpamplona.amethyst.commons.subscriptions.createMetadataSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createSearchPeopleSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.rememberSubscription
+import com.vitorpamplona.amethyst.commons.ui.components.UserSearchCard
+import com.vitorpamplona.amethyst.commons.viewmodels.SearchBarState
+import com.vitorpamplona.amethyst.desktop.cache.DesktopLocalCache
+import com.vitorpamplona.amethyst.desktop.network.DesktopRelayConnectionManager
+import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
+import com.vitorpamplona.quartz.nip19Bech32.decodePublicKeyAsHexOrNull
+
+@Composable
+fun SearchScreen(
+    localCache: DesktopLocalCache,
+    relayManager: DesktopRelayConnectionManager,
+    onNavigateToProfile: (String) -> Unit,
+    onNavigateToThread: (String) -> Unit,
+    onNavigateToHashtag: (String) -> Unit = {},
+    modifier: Modifier = Modifier,
+) {
+    val scope = rememberCoroutineScope()
+    val searchState = remember { SearchBarState(localCache, scope) }
+    val focusRequester = remember { FocusRequester() }
+    val relayStatuses by relayManager.relayStatuses.collectAsState()
+
+    // Collect state from SearchBarState
+    val searchText by searchState.searchText.collectAsState()
+    val bech32Results by searchState.bech32Results.collectAsState()
+    val cachedUserResults by searchState.cachedUserResults.collectAsState()
+    val relaySearchResults by searchState.relaySearchResults.collectAsState()
+    val isSearchingRelays by searchState.isSearchingRelays.collectAsState()
+
+    // NIP-50 relay search when local cache has few/no results
+    rememberSubscription(relayStatuses, searchText, cachedUserResults.size, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty()) return@rememberSubscription null
+
+        // Only search relays if we have a real query and limited local results
+        if (searchState.shouldSearchRelays) {
+            searchState.startRelaySearch()
+            createSearchPeopleSubscription(
+                relays = configuredRelays,
+                searchQuery = searchText,
+                limit = 20,
+                onEvent = { event, _, _, _ ->
+                    if (event is MetadataEvent) {
+                        localCache.consumeMetadata(event)
+                        val user = localCache.getUserIfExists(event.pubKey)
+                        if (user != null) {
+                            searchState.addRelaySearchResult(user)
+                        }
+                    }
+                },
+                onEose = { _, _ ->
+                    searchState.endRelaySearch()
+                },
+            )
+        } else {
+            null
+        }
+    }
+
+    // Subscribe to metadata for searched users (to populate cache)
+    rememberSubscription(relayStatuses, searchText, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || searchText.length < 2) {
+            return@rememberSubscription null
+        }
+
+        // If it's a specific pubkey search, fetch that user's metadata
+        val pubkeyHex = decodePublicKeyAsHexOrNull(searchText)
+        if (pubkeyHex != null) {
+            createMetadataSubscription(
+                relays = configuredRelays,
+                pubKeyHex = pubkeyHex,
+                onEvent = { event, _, _, _ ->
+                    if (event is MetadataEvent) {
+                        localCache.consumeMetadata(event)
+                    }
+                },
+            )
+        } else {
+            null
+        }
+    }
+
+    // Auto-focus the search field
+    LaunchedEffect(Unit) {
+        focusRequester.requestFocus()
+    }
+
+    Column(
+        modifier = modifier.fillMaxSize(),
+    ) {
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Text(
+                "Search",
+                style = MaterialTheme.typography.headlineMedium,
+                color = MaterialTheme.colorScheme.onBackground,
+            )
+            Text(
+                "${localCache.userCount()} users cached",
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+
+        Spacer(Modifier.height(16.dp))
+
+        // Search input field
+        OutlinedTextField(
+            value = searchText,
+            onValueChange = { searchState.updateSearchText(it) },
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .focusRequester(focusRequester),
+            placeholder = { Text("Search by name, npub, nevent, or #hashtag") },
+            leadingIcon = {
+                Icon(
+                    Icons.Default.Search,
+                    contentDescription = "Search",
+                    tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            },
+            trailingIcon = {
+                if (searchText.isNotEmpty()) {
+                    IconButton(onClick = { searchState.clearSearch() }) {
+                        Icon(
+                            Icons.Default.Clear,
+                            contentDescription = "Clear",
+                            tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
+                }
+            },
+            singleLine = true,
+            shape = RoundedCornerShape(12.dp),
+        )
+
+        Spacer(Modifier.height(16.dp))
+
+        // Results
+        val hasResults = bech32Results.isNotEmpty() || cachedUserResults.isNotEmpty() || relaySearchResults.isNotEmpty()
+
+        if (!hasResults && searchText.isNotEmpty() && searchText.length >= 2 && !isSearchingRelays) {
+            Text(
+                "No matches found. Try a name, npub, nevent, or #hashtag.",
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                style = MaterialTheme.typography.bodyMedium,
+            )
+        } else if (isSearchingRelays && !hasResults) {
+            Text(
+                "Searching relays...",
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                style = MaterialTheme.typography.bodyMedium,
+            )
+        } else if (hasResults) {
+            LazyColumn(
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+            ) {
+                // Bech32/hex results first
+                if (bech32Results.isNotEmpty()) {
+                    item {
+                        Text(
+                            "Direct lookup",
+                            style = MaterialTheme.typography.labelMedium,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            modifier = Modifier.padding(vertical = 4.dp),
+                        )
+                    }
+                    items(bech32Results) { result ->
+                        SearchResultCard(
+                            result = result,
+                            onNavigateToProfile = onNavigateToProfile,
+                            onNavigateToThread = onNavigateToThread,
+                            onNavigateToHashtag = onNavigateToHashtag,
+                        )
+                    }
+                }
+
+                // Cached user results
+                if (cachedUserResults.isNotEmpty()) {
+                    if (bech32Results.isNotEmpty()) {
+                        item {
+                            HorizontalDivider(Modifier.padding(vertical = 8.dp))
+                        }
+                    }
+                    item {
+                        Text(
+                            "Cached users (${cachedUserResults.size})",
+                            style = MaterialTheme.typography.labelMedium,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            modifier = Modifier.padding(vertical = 4.dp),
+                        )
+                    }
+                    items(cachedUserResults, key = { "cached-${it.pubkeyHex}" }) { user ->
+                        UserSearchCard(
+                            user = user,
+                            onClick = { onNavigateToProfile(user.pubkeyHex) },
+                        )
+                    }
+                }
+
+                // Relay search results (NIP-50)
+                if (relaySearchResults.isNotEmpty()) {
+                    if (bech32Results.isNotEmpty() || cachedUserResults.isNotEmpty()) {
+                        item {
+                            HorizontalDivider(Modifier.padding(vertical = 8.dp))
+                        }
+                    }
+                    item {
+                        Row(
+                            verticalAlignment = Alignment.CenterVertically,
+                            horizontalArrangement = Arrangement.spacedBy(8.dp),
+                        ) {
+                            Text(
+                                "From relays (${relaySearchResults.size})",
+                                style = MaterialTheme.typography.labelMedium,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                modifier = Modifier.padding(vertical = 4.dp),
+                            )
+                            if (isSearchingRelays) {
+                                Text(
+                                    "searching...",
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.primary,
+                                )
+                            }
+                        }
+                    }
+                    items(relaySearchResults, key = { "relay-${it.pubkeyHex}" }) { user ->
+                        UserSearchCard(
+                            user = user,
+                            onClick = { onNavigateToProfile(user.pubkeyHex) },
+                        )
+                    }
+                } else if (isSearchingRelays && cachedUserResults.isEmpty()) {
+                    item {
+                        Text(
+                            "Searching relays...",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            modifier = Modifier.padding(vertical = 8.dp),
+                        )
+                    }
+                }
+            }
+        } else {
+            // Empty state
+            Column(
+                modifier = Modifier.fillMaxWidth().padding(top = 32.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                Text(
+                    "Search for users or notes",
+                    style = MaterialTheme.typography.titleMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+                Spacer(Modifier.height(8.dp))
+                Text(
+                    "Enter a name or Nostr identifier:",
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    style = MaterialTheme.typography.bodyMedium,
+                )
+                Spacer(Modifier.height(16.dp))
+                Column(
+                    verticalArrangement = Arrangement.spacedBy(4.dp),
+                ) {
+                    SearchHint("vitor", "Search by name")
+                    SearchHint("npub1...", "User profile")
+                    SearchHint("note1...", "Single note")
+                    SearchHint("nevent1...", "Note with metadata")
+                    SearchHint("#hashtag", "Hashtag search")
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun SearchHint(
+    identifier: String,
+    description: String,
+) {
+    Row(
+        modifier = Modifier.fillMaxWidth(0.6f),
+        horizontalArrangement = Arrangement.SpaceBetween,
+    ) {
+        Text(
+            identifier,
+            style = MaterialTheme.typography.bodySmall,
+            fontFamily = FontFamily.Monospace,
+            color = MaterialTheme.colorScheme.primary,
+        )
+        Spacer(Modifier.width(16.dp))
+        Text(
+            description,
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+    }
+}
+
+@Composable
+private fun SearchResultCard(
+    result: SearchResult,
+    onNavigateToProfile: (String) -> Unit,
+    onNavigateToThread: (String) -> Unit,
+    onNavigateToHashtag: (String) -> Unit,
+) {
+    Card(
+        modifier =
+            Modifier
+                .fillMaxWidth()
+                .clickable {
+                    when (result) {
+                        is SearchResult.UserResult -> onNavigateToProfile(result.pubKeyHex)
+                        is SearchResult.CachedUserResult -> onNavigateToProfile(result.user.pubkeyHex)
+                        is SearchResult.NoteResult -> onNavigateToThread(result.noteIdHex)
+                        is SearchResult.AddressResult -> {
+                            onNavigateToThread("${result.kind}:${result.pubKeyHex}:${result.dTag}")
+                        }
+                        is SearchResult.HashtagResult -> onNavigateToHashtag(result.hashtag)
+                    }
+                },
+        colors =
+            CardDefaults.cardColors(
+                containerColor = MaterialTheme.colorScheme.surfaceVariant,
+            ),
+    ) {
+        Row(
+            modifier = Modifier.padding(16.dp).fillMaxWidth(),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(12.dp),
+        ) {
+            Icon(
+                imageVector =
+                    when (result) {
+                        is SearchResult.UserResult -> Icons.Default.Person
+                        is SearchResult.CachedUserResult -> Icons.Default.Person
+                        is SearchResult.NoteResult -> Icons.Default.Description
+                        is SearchResult.AddressResult -> Icons.Default.Description
+                        is SearchResult.HashtagResult -> Icons.Default.Tag
+                    },
+                contentDescription = null,
+                modifier = Modifier.size(24.dp),
+                tint = MaterialTheme.colorScheme.primary,
+            )
+
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    when (result) {
+                        is SearchResult.UserResult -> "User Profile"
+                        is SearchResult.CachedUserResult -> result.user.toBestDisplayName()
+                        is SearchResult.NoteResult -> "Note"
+                        is SearchResult.AddressResult -> "Event (kind ${result.kind})"
+                        is SearchResult.HashtagResult -> "#${result.hashtag}"
+                    },
+                    style = MaterialTheme.typography.titleSmall,
+                    color = MaterialTheme.colorScheme.onSurface,
+                )
+                Text(
+                    when (result) {
+                        is SearchResult.UserResult -> result.displayId
+                        is SearchResult.CachedUserResult -> result.user.pubkeyDisplayHex()
+                        is SearchResult.NoteResult -> result.displayId
+                        is SearchResult.AddressResult -> result.displayId
+                        is SearchResult.HashtagResult -> "Search posts with this hashtag"
+                    },
+                    style = MaterialTheme.typography.bodySmall,
+                    fontFamily = if (result is SearchResult.HashtagResult) null else FontFamily.Monospace,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+
+            Icon(
+                Icons.AutoMirrored.Filled.ArrowForward,
+                contentDescription = "Navigate",
+                tint = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+    }
+}

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

@@ -52,16 +52,28 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.commons.account.AccountState
 import com.vitorpamplona.amethyst.commons.state.EventCollectionState
+import com.vitorpamplona.amethyst.commons.subscriptions.FilterBuilders
+import com.vitorpamplona.amethyst.commons.subscriptions.SubscriptionConfig
 import com.vitorpamplona.amethyst.commons.subscriptions.createNoteSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createReactionsSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createRepliesSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createRepostsSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.createThreadRepliesSubscription
+import com.vitorpamplona.amethyst.commons.subscriptions.createZapsSubscription
 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
 import com.vitorpamplona.amethyst.commons.util.toNoteDisplayData
+import com.vitorpamplona.amethyst.desktop.cache.DesktopLocalCache
 import com.vitorpamplona.amethyst.desktop.network.DesktopRelayConnectionManager
 import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip18Reposts.RepostEvent
+import com.vitorpamplona.quartz.nip25Reactions.ReactionEvent
+import com.vitorpamplona.quartz.nip51Lists.bookmarkList.BookmarkListEvent
+import com.vitorpamplona.quartz.nip51Lists.bookmarkList.tags.EventBookmark
+import com.vitorpamplona.quartz.nip57Zaps.LnZapEvent
 
 /**
  * Desktop Thread Screen - displays a note and all its replies in a thread view.
@@ -72,10 +84,14 @@ import com.vitorpamplona.quartz.nip01Core.core.Event
 fun ThreadScreen(
     noteId: String,
     relayManager: DesktopRelayConnectionManager,
+    localCache: DesktopLocalCache,
     account: AccountState.LoggedIn?,
+    nwcConnection: com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect.Nip47URINorm? = null,
     onBack: () -> Unit,
     onNavigateToProfile: (String) -> Unit = {},
     onNavigateToThread: (String) -> Unit = {},
+    onZapFeedback: (ZapFeedback) -> Unit = {},
+    onReply: (Event) -> Unit = {},
 ) {
     val connectedRelays by relayManager.connectedRelays.collectAsState()
     val relayStatuses by relayManager.relayStatuses.collectAsState()
@@ -103,6 +119,50 @@ fun ThreadScreen(
     var rootNoteEoseReceived by remember(noteId) { mutableStateOf(false) }
     var repliesEoseReceived by remember(noteId) { mutableStateOf(false) }
 
+    // Track zaps per event
+    var zapsByEvent by remember(noteId) { mutableStateOf<Map<String, List<ZapReceipt>>>(emptyMap()) }
+    var reactionsByEvent by remember(noteId) { mutableStateOf<Map<String, Int>>(emptyMap()) }
+    var repliesByEvent by remember(noteId) { mutableStateOf<Map<String, Int>>(emptyMap()) }
+    var repostsByEvent by remember(noteId) { mutableStateOf<Map<String, Int>>(emptyMap()) }
+
+    // Bookmark state
+    var bookmarkList by remember { mutableStateOf<BookmarkListEvent?>(null) }
+    var bookmarkedEventIds by remember { mutableStateOf<Set<String>>(emptySet()) }
+
+    // Subscribe to user's bookmark list
+    rememberSubscription(relayStatuses, account, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isNotEmpty() && account != null) {
+            SubscriptionConfig(
+                subId = "thread-bookmarks-${account.pubKeyHex.take(8)}",
+                filters =
+                    listOf(
+                        FilterBuilders.byAuthors(
+                            authors = listOf(account.pubKeyHex),
+                            kinds = listOf(BookmarkListEvent.KIND),
+                            limit = 1,
+                        ),
+                    ),
+                relays = configuredRelays,
+                onEvent = { event, _, _, _ ->
+                    if (event is BookmarkListEvent) {
+                        bookmarkList = event
+                        val pubIds =
+                            event
+                                .publicBookmarks()
+                                .filterIsInstance<EventBookmark>()
+                                .map { it.eventId }
+                                .toSet()
+                        bookmarkedEventIds = pubIds
+                    }
+                },
+                onEose = { _, _ -> },
+            )
+        } else {
+            null
+        }
+    }
+
     // Subscribe to the root note
     rememberSubscription(relayStatuses, noteId, relayManager = relayManager) {
         val configuredRelays = relayStatuses.keys
@@ -144,6 +204,103 @@ fun ThreadScreen(
         }
     }
 
+    // Subscribe to zaps for thread events
+    val allEventIds = listOf(noteId) + replyEvents.map { it.id }
+    rememberSubscription(relayStatuses, allEventIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || allEventIds.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createZapsSubscription(
+            relays = configuredRelays,
+            eventIds = allEventIds,
+            onEvent = { event, _, _, _ ->
+                if (event is LnZapEvent) {
+                    val receipt = event.toZapReceipt(localCache) ?: return@createZapsSubscription
+                    val targetEventId = event.zappedPost().firstOrNull() ?: return@createZapsSubscription
+                    zapsByEvent =
+                        zapsByEvent.toMutableMap().apply {
+                            val existing = this[targetEventId] ?: emptyList()
+                            if (existing.none { it.createdAt == receipt.createdAt && it.senderPubKey == receipt.senderPubKey }) {
+                                this[targetEventId] = existing + receipt
+                            }
+                        }
+                }
+            },
+        )
+    }
+
+    // Subscribe to reactions for thread events
+    rememberSubscription(relayStatuses, allEventIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || allEventIds.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createReactionsSubscription(
+            relays = configuredRelays,
+            eventIds = allEventIds,
+            onEvent = { event, _, _, _ ->
+                if (event is ReactionEvent) {
+                    val targetEventId = event.originalPost().firstOrNull() ?: return@createReactionsSubscription
+                    reactionsByEvent =
+                        reactionsByEvent.toMutableMap().apply {
+                            this[targetEventId] = (this[targetEventId] ?: 0) + 1
+                        }
+                }
+            },
+        )
+    }
+
+    // Subscribe to replies for thread events (for counts)
+    rememberSubscription(relayStatuses, allEventIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || allEventIds.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createRepliesSubscription(
+            relays = configuredRelays,
+            eventIds = allEventIds,
+            onEvent = { event, _, _, _ ->
+                val replyToId =
+                    event.tags
+                        .filter { it.size >= 2 && it[0] == "e" }
+                        .lastOrNull()
+                        ?.get(1) ?: return@createRepliesSubscription
+                if (replyToId in allEventIds) {
+                    repliesByEvent =
+                        repliesByEvent.toMutableMap().apply {
+                            this[replyToId] = (this[replyToId] ?: 0) + 1
+                        }
+                }
+            },
+        )
+    }
+
+    // Subscribe to reposts for thread events
+    rememberSubscription(relayStatuses, allEventIds, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isEmpty() || allEventIds.isEmpty()) {
+            return@rememberSubscription null
+        }
+
+        createRepostsSubscription(
+            relays = configuredRelays,
+            eventIds = allEventIds,
+            onEvent = { event, _, _, _ ->
+                if (event is RepostEvent) {
+                    val targetEventId = event.boostedEventId() ?: return@createRepostsSubscription
+                    repostsByEvent =
+                        repostsByEvent.toMutableMap().apply {
+                            this[targetEventId] = (this[targetEventId] ?: 0) + 1
+                        }
+                }
+            },
+        )
+    }
+
     // Calculate reply level for an event based on e-tags
     fun calculateLevel(event: Event): Int {
         levelCache[event.id]?.let { return it }
@@ -205,16 +362,38 @@ fun ThreadScreen(
                             },
                     ) {
                         NoteCard(
-                            note = rootNote!!.toNoteDisplayData(),
+                            note = rootNote!!.toNoteDisplayData(localCache),
                             onAuthorClick = onNavigateToProfile,
                         )
                         if (account != null) {
+                            val rootZaps = zapsByEvent[noteId] ?: emptyList()
                             NoteActionsRow(
                                 event = rootNote!!,
                                 relayManager = relayManager,
+                                localCache = localCache,
                                 account = account,
-                                onReplyClick = { /* TODO: Open reply dialog */ },
+                                nwcConnection = nwcConnection,
+                                onReplyClick = { onReply(rootNote!!) },
+                                onZapFeedback = onZapFeedback,
                                 modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),
+                                zapCount = rootZaps.size,
+                                zapAmountSats = rootZaps.sumOf { it.amountSats },
+                                zapReceipts = rootZaps,
+                                reactionCount = reactionsByEvent[noteId] ?: 0,
+                                replyCount = repliesByEvent[noteId] ?: 0,
+                                repostCount = repostsByEvent[noteId] ?: 0,
+                                bookmarkList = bookmarkList,
+                                isBookmarked = bookmarkedEventIds.contains(noteId),
+                                onBookmarkChanged = { newList ->
+                                    bookmarkList = newList
+                                    val pubIds =
+                                        newList
+                                            .publicBookmarks()
+                                            .filterIsInstance<EventBookmark>()
+                                            .map { it.eventId }
+                                            .toSet()
+                                    bookmarkedEventIds = pubIds
+                                },
                             )
                         }
                     }
@@ -242,16 +421,38 @@ fun ThreadScreen(
                                 },
                     ) {
                         NoteCard(
-                            note = event.toNoteDisplayData(),
+                            note = event.toNoteDisplayData(localCache),
                             onAuthorClick = onNavigateToProfile,
                         )
                         if (account != null) {
+                            val eventZaps = zapsByEvent[event.id] ?: emptyList()
                             NoteActionsRow(
                                 event = event,
                                 relayManager = relayManager,
+                                localCache = localCache,
                                 account = account,
-                                onReplyClick = { /* TODO: Open reply dialog */ },
+                                nwcConnection = nwcConnection,
+                                onReplyClick = { onReply(event) },
+                                onZapFeedback = onZapFeedback,
                                 modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),
+                                zapCount = eventZaps.size,
+                                zapAmountSats = eventZaps.sumOf { it.amountSats },
+                                zapReceipts = eventZaps,
+                                reactionCount = reactionsByEvent[event.id] ?: 0,
+                                replyCount = repliesByEvent[event.id] ?: 0,
+                                repostCount = repostsByEvent[event.id] ?: 0,
+                                bookmarkList = bookmarkList,
+                                isBookmarked = bookmarkedEventIds.contains(event.id),
+                                onBookmarkChanged = { newList ->
+                                    bookmarkList = newList
+                                    val pubIds =
+                                        newList
+                                            .publicBookmarks()
+                                            .filterIsInstance<EventBookmark>()
+                                            .map { it.eventId }
+                                            .toSet()
+                                    bookmarkedEventIds = pubIds
+                                },
                             )
                         }
                     }

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

@@ -35,6 +35,8 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.ContentCopy
 import androidx.compose.material.icons.filled.PersonAdd
 import androidx.compose.material.icons.filled.PersonRemove
 import androidx.compose.material3.Button
@@ -46,6 +48,7 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -60,20 +63,26 @@ import com.vitorpamplona.amethyst.commons.account.AccountState
 import com.vitorpamplona.amethyst.commons.model.nip02FollowList.FollowAction
 import com.vitorpamplona.amethyst.commons.state.EventCollectionState
 import com.vitorpamplona.amethyst.commons.state.FollowState
+import com.vitorpamplona.amethyst.commons.subscriptions.FilterBuilders
+import com.vitorpamplona.amethyst.commons.subscriptions.SubscriptionConfig
 import com.vitorpamplona.amethyst.commons.subscriptions.createContactListSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.createMetadataSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.createUserPostsSubscription
 import com.vitorpamplona.amethyst.commons.subscriptions.rememberSubscription
 import com.vitorpamplona.amethyst.commons.ui.components.LoadingState
 import com.vitorpamplona.amethyst.commons.ui.components.UserAvatar
+import com.vitorpamplona.amethyst.desktop.cache.DesktopLocalCache
 import com.vitorpamplona.amethyst.desktop.network.DesktopRelayConnectionManager
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.core.hexToByteArrayOrNull
 import com.vitorpamplona.quartz.nip02FollowList.ContactListEvent
 import com.vitorpamplona.quartz.nip19Bech32.toNpub
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import java.awt.Toolkit
+import java.awt.datatransfer.StringSelection
 
 /**
  * User profile screen showing user info, follow button, and their posts.
@@ -82,10 +91,13 @@ import kotlinx.coroutines.withContext
 fun UserProfileScreen(
     pubKeyHex: String,
     relayManager: DesktopRelayConnectionManager,
+    localCache: DesktopLocalCache,
     account: AccountState.LoggedIn?,
+    nwcConnection: com.vitorpamplona.quartz.nip47WalletConnect.Nip47WalletConnect.Nip47URINorm? = null,
     onBack: () -> Unit,
     onCompose: () -> Unit = {},
     onNavigateToProfile: (String) -> Unit = {},
+    onZapFeedback: (ZapFeedback) -> Unit = {},
 ) {
     val connectedRelays by relayManager.connectedRelays.collectAsState()
     val relayStatuses by relayManager.relayStatuses.collectAsState()
@@ -188,6 +200,61 @@ fun UserProfileScreen(
         }
     }
 
+    // Subscribe to profile user's contact list (for following count)
+    rememberSubscription(relayStatuses, pubKeyHex, retryTrigger, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isNotEmpty()) {
+            createContactListSubscription(
+                relays = configuredRelays,
+                pubKeyHex = pubKeyHex,
+                onEvent = { event, _, _, _ ->
+                    if (event is ContactListEvent) {
+                        // Count the number of people this user follows
+                        followingCount = event.verifiedFollowKeySet().size
+                    }
+                },
+                onEose = { _, _ -> },
+            )
+        } else {
+            null
+        }
+    }
+
+    // Track unique followers (authors of contact lists that tag this pubkey)
+    val followerAuthors = remember(pubKeyHex) { mutableSetOf<String>() }
+
+    // Subscribe to followers (contact lists that tag this user)
+    rememberSubscription(relayStatuses, pubKeyHex, retryTrigger, relayManager = relayManager) {
+        val configuredRelays = relayStatuses.keys
+        if (configuredRelays.isNotEmpty()) {
+            // Clear previous followers when subscription restarts
+            followerAuthors.clear()
+            followersCount = 0
+
+            SubscriptionConfig(
+                subId = "followers-${pubKeyHex.take(8)}-${System.currentTimeMillis()}",
+                filters =
+                    listOf(
+                        FilterBuilders.byPTags(
+                            pubKeys = listOf(pubKeyHex),
+                            kinds = listOf(3), // ContactListEvent
+                            limit = 500,
+                        ),
+                    ),
+                relays = configuredRelays,
+                onEvent = { event, _, _, _ ->
+                    // Count unique authors who follow this user
+                    if (followerAuthors.add(event.pubKey)) {
+                        followersCount = followerAuthors.size
+                    }
+                },
+                onEose = { _, _ -> },
+            )
+        } else {
+            null
+        }
+    }
+
     // Subscribe to user posts
     rememberSubscription(relayStatuses, pubKeyHex, retryTrigger, relayManager = relayManager) {
         val configuredRelays = relayStatuses.keys
@@ -339,11 +406,49 @@ fun UserProfileScreen(
                                 fontWeight = FontWeight.Bold,
                             )
                             Spacer(Modifier.height(4.dp))
+                            val npub = pubKeyHex.hexToByteArrayOrNull()?.toNpub()
+                            var copied by remember { mutableStateOf(false) }
+
+                            // Reset copied state after delay
+                            LaunchedEffect(copied) {
+                                if (copied) {
+                                    delay(2000)
+                                    copied = false
+                                }
+                            }
+
+                            Row(
+                                verticalAlignment = Alignment.CenterVertically,
+                                horizontalArrangement = Arrangement.spacedBy(4.dp),
+                            ) {
                                 Text(
-                                (pubKeyHex.hexToByteArrayOrNull()?.toNpub()?.take(32) ?: pubKeyHex.take(32)) + "...",
+                                    (npub?.take(32) ?: pubKeyHex.take(32)) + "...",
                                     style = MaterialTheme.typography.bodySmall,
                                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                                 )
+                                if (npub != null) {
+                                    IconButton(
+                                        onClick = {
+                                            val clipboard = Toolkit.getDefaultToolkit().systemClipboard
+                                            clipboard.setContents(StringSelection(npub), null)
+                                            copied = true
+                                        },
+                                        modifier = Modifier.size(20.dp),
+                                    ) {
+                                        Icon(
+                                            if (copied) Icons.Default.Check else Icons.Default.ContentCopy,
+                                            contentDescription = if (copied) "Copied" else "Copy npub",
+                                            modifier = Modifier.size(14.dp),
+                                            tint =
+                                                if (copied) {
+                                                    MaterialTheme.colorScheme.primary
+                                                } else {
+                                                    MaterialTheme.colorScheme.onSurfaceVariant
+                                                },
+                                        )
+                                    }
+                                }
+                            }
                         }
                     }
 
@@ -461,8 +566,11 @@ fun UserProfileScreen(
                             FeedNoteCard(
                                 event = event,
                                 relayManager = relayManager,
+                                localCache = localCache,
                                 account = account,
+                                nwcConnection = nwcConnection,
                                 onReply = onCompose,
+                                onZapFeedback = onZapFeedback,
                                 onNavigateToProfile = onNavigateToProfile,
                             )
                         }