feat(podcasts): surface NIP-22 comments on episode list rows

Episode comments already work end to end — replying to an episode routes to
the NIP-22 GenericCommentPost composer (kind 1111 scoped to the episode
address), the thread datasource fetches them via #a/#A, and the thread view
renders them with a full reactions row. The only gap was discoverability on
the podcast-specific surfaces.

Add a comments chip (comment glyph + live reply count via
observeNoteReplyCount) to PodcastEpisodeListItem. It reads "N comments" (or
"Comment" when empty) and opens the episode's thread, where the discussion
lives and new comments are composed. Reuses the existing thread/composer
machinery — no new event plumbing.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JGa1EM5KWyDo1o5Yr6sS18

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/podcasts/PodcastEpisodeListItem.kt

@@ -23,27 +23,34 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn.podcasts
 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.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.relayClient.reqCommand.event.observeNoteReplyCount
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.navigation.routes.routeFor
+import com.vitorpamplona.amethyst.ui.note.CommentIcon
 import com.vitorpamplona.amethyst.ui.note.timeAgo
 import com.vitorpamplona.amethyst.ui.note.types.PodcastEpisodeAudioPlayer
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.Size18Modifier
 import com.vitorpamplona.amethyst.ui.theme.Size5dp
 import com.vitorpamplona.amethyst.ui.theme.grayText
 import com.vitorpamplona.quartz.podcasts.PodcastEpisode
@@ -132,5 +139,44 @@ fun PodcastEpisodeListItem(
                 accountViewModel = accountViewModel,
             )
         }
+
+        EpisodeCommentsChip(note, accountViewModel, nav)
+    }
+}
+
+/**
+ * A "comments" affordance for an episode list row: the NIP-22 (kind 1111) reply count plus a comment
+ * glyph, opening the episode's thread where the discussion lives and new comments are composed.
+ * Everything downstream — fetching `#a`/`#A` comments, the reply composer, the count — already works
+ * through the standard thread; this just surfaces it on the podcast-specific list.
+ */
+@Composable
+private fun EpisodeCommentsChip(
+    note: Note,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val commentCount by observeNoteReplyCount(note, accountViewModel)
+
+    Row(
+        modifier =
+            Modifier
+                .clip(RoundedCornerShape(8.dp))
+                .clickable { routeFor(note, accountViewModel.account)?.let { nav.nav(it) } }
+                .padding(vertical = 4.dp),
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.spacedBy(6.dp),
+    ) {
+        CommentIcon(Size18Modifier, MaterialTheme.colorScheme.grayText)
+        Text(
+            text =
+                if (commentCount == 0) {
+                    stringRes(R.string.podcast_comment_action)
+                } else {
+                    pluralStringResource(R.plurals.podcast_comment_count, commentCount, commentCount)
+                },
+            style = MaterialTheme.typography.labelMedium,
+            color = MaterialTheme.colorScheme.grayText,
+        )
     }
 }

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

@@ -1011,6 +1011,11 @@
     <string name="podcast_value_for_value">Value-for-Value</string>
     <string name="podcast_value_split_percent">%1$d%%</string>
     <string name="podcast_value_zap_split_hint">Zaps to this are split between:</string>
+    <string name="podcast_comment_action">Comment</string>
+    <plurals name="podcast_comment_count">
+        <item quantity="one">%1$d comment</item>
+        <item quantity="other">%1$d comments</item>
+    </plurals>
     <string name="podcast_role_host">Host</string>
     <string name="podcast_role_cohost">Co-host</string>
     <string name="podcast_role_editor">Editor</string>