feat: show open polls at top of notification screen

Adds an "Open Polls" section at the top of the notification feed that
displays the user's PollEvent (NIP-88) and ZapPollEvent (kind 6969)
that are still active. Polls without a closing time are assumed to
expire 1 day after creation.

https://claude.ai/code/session_01LLLN5MDA5nJFYx38MVo81Q

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/notifications/CardFeedView.kt

@@ -165,6 +165,7 @@ private fun FeedLoaded(
     nav: INav,
 ) {
     val items by loaded.feed.collectAsStateWithLifecycle()
+    val openPolls by openPollsState(accountViewModel)
 
     LazyColumn(
         modifier = Modifier.fillMaxSize(),
@@ -175,6 +176,34 @@ private fun FeedLoaded(
             ShowDonationCard(accountViewModel, nav)
         }
 
+        if (openPolls.isNotEmpty()) {
+            item {
+                OpenPollsSectionHeader()
+            }
+
+            itemsIndexed(
+                items = openPolls,
+                key = { _, item -> "open-poll-${item.idHex}" },
+                contentType = { _, _ -> "OpenPoll" },
+            ) { _, note ->
+                Row(Modifier.fillMaxWidth().animateItem()) {
+                    NoteCompose(
+                        baseNote = note,
+                        modifier = Modifier.fillMaxWidth(),
+                        routeForLastRead = routeForLastRead,
+                        isBoostedNote = false,
+                        isQuotedNote = false,
+                        quotesLeft = 3,
+                        accountViewModel = accountViewModel,
+                        nav = nav,
+                    )
+                }
+                HorizontalDivider(
+                    thickness = DividerThickness,
+                )
+            }
+        }
+
         itemsIndexed(
             items = items.list,
             key = { _, item -> item.id() },

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/notifications/OpenPollsSection.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.ui.screen.loggedIn.notifications
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.produceState
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.quartz.experimental.zapPolls.ZapPollEvent
+import com.vitorpamplona.quartz.nip88Polls.poll.PollEvent
+import com.vitorpamplona.quartz.utils.TimeUtils
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+@Composable
+fun openPollsState(accountViewModel: AccountViewModel) =
+    produceState(initialValue = emptyList<Note>(), accountViewModel) {
+        value =
+            withContext(Dispatchers.IO) {
+                findOpenPolls(accountViewModel)
+            }
+    }
+
+private fun findOpenPolls(accountViewModel: AccountViewModel): List<Note> {
+    val userPubkeyHex = accountViewModel.account.userProfile().pubkeyHex
+    val now = TimeUtils.now()
+    val oneDayInSeconds = TimeUtils.ONE_DAY
+
+    val openPolls = mutableListOf<Note>()
+
+    LocalCache.notes.forEach { _, note ->
+        val event = note.event ?: return@forEach
+
+        when (event) {
+            is PollEvent -> {
+                if (event.pubKey == userPubkeyHex) {
+                    val endsAt = event.endsAt()
+                    val isOpen =
+                        if (endsAt != null) {
+                            endsAt > now
+                        } else {
+                            event.createdAt + oneDayInSeconds > now
+                        }
+                    if (isOpen) {
+                        openPolls.add(note)
+                    }
+                }
+            }
+
+            is ZapPollEvent -> {
+                if (event.pubKey == userPubkeyHex) {
+                    val closedAt = event.closedAt()
+                    val isOpen =
+                        if (closedAt != null) {
+                            closedAt > now
+                        } else {
+                            event.createdAt + oneDayInSeconds > now
+                        }
+                    if (isOpen) {
+                        openPolls.add(note)
+                    }
+                }
+            }
+        }
+    }
+
+    return openPolls.sortedByDescending { it.createdAt() }
+}
+
+@Composable
+fun OpenPollsSectionHeader() {
+    Text(
+        text = stringRes(R.string.open_polls),
+        style = MaterialTheme.typography.titleSmall,
+        fontWeight = FontWeight.Bold,
+        modifier = Modifier.padding(horizontal = 12.dp, vertical = 8.dp),
+    )
+}

amethyst/src/main/res/values/strings.xml

@@ -258,6 +258,7 @@
     <string name="error_loading_replies">"Error loading replies: "</string>
     <string name="try_again">Try again</string>
     <string name="notification_feed_is_empty">No notifications yet.</string>
+    <string name="open_polls">Open Polls</string>
     <string name="feed_is_empty">Feed is empty.</string>
     <string name="refresh">Refresh</string>
     <string name="created">created</string>