feat: add "Mine" to the Podcasts and Podcast Episodes feed filters

The two podcast feeds used kind3GlobalPeopleRoutes, which omits the "Mine"
option — so a creator had no way to filter the feed down to their own published
shows/episodes (and the default follow-list view is usually empty for podcasts,
since NIP-F4 shows are their own keypairs you rarely kind:3-follow).

Add a podcastRoutes catalog in TopNavFilterState that mirrors musicRoutes
(content catalog + Mine + interests + mute list) and point both podcast top bars
at it. "Mine" resolves to an AuthorsTopNavPerRelayFilterSet of the user's own
pubkey, which the podcast SubAssemblyHelper already dispatches through
filterPodcastEventsByAuthors — so selecting it actually fetches the creator's
own catalog, not a dead option.

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/TopNavFilterState.kt

@@ -328,6 +328,24 @@ class TopNavFilterState(
             )
         }
 
+    private val _podcastRoutes =
+        combineTransform(
+            livePeopleListsFlow,
+            liveInterestFlows,
+        ) { peopleLists, interests ->
+            checkNotInMainThread()
+            emit(
+                listOf(
+                    // Same content-style catalog as kind3GlobalPeopleRoutes, plus "Mine" so the
+                    // podcasts + episodes screens can show only the user's own published shows/episodes.
+                    listOf(allFollows, userFollows, kind3Follows, aroundMe, globalFollow, mineFollow),
+                    peopleLists,
+                    interests,
+                    listOf(muteListFollow),
+                ).flatten().toImmutableList(),
+            )
+        }
+
     private val _kind3GlobalPeople =
         livePeopleListsFlow.transform { peopleLists ->
             checkNotInMainThread()
@@ -408,6 +426,11 @@ class TopNavFilterState(
             .flowOn(Dispatchers.IO)
             .stateIn(scope, SharingStarted.Eagerly, persistentListOf(allFollows, userFollows, kind3Follows, aroundMe, globalFollow, mineFollow, muteListFollow))
 
+    val podcastRoutes =
+        _podcastRoutes
+            .flowOn(Dispatchers.IO)
+            .stateIn(scope, SharingStarted.Eagerly, persistentListOf(allFollows, userFollows, kind3Follows, aroundMe, globalFollow, mineFollow, muteListFollow))
+
     fun destroy() {
         Log.d("Init") { "OnCleared: ${this.javaClass.simpleName}" }
     }

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

@@ -62,9 +62,10 @@ private fun PodcastEpisodesTopNavFilterBar(
     accountViewModel: AccountViewModel,
     onChange: (FeedDefinition) -> Unit,
 ) {
-    // Same content-style catalog as Music/Articles — All Follows, Your Follows, kind3
-    // Follows, Around Me, Global, people lists, interest sets, mute list.
-    val allLists by followListsModel.kind3GlobalPeopleRoutes.collectAsStateWithLifecycle()
+    // Same content-style catalog as Music — All Follows, Your Follows, kind3 Follows,
+    // Around Me, Global, Mine (the user's own published shows/episodes), people lists,
+    // interest sets, mute list.
+    val allLists by followListsModel.podcastRoutes.collectAsStateWithLifecycle()
 
     FeedFilterSpinner(
         placeholderCode = listName,

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

@@ -62,7 +62,7 @@ private fun PodcastsTopNavFilterBar(
     accountViewModel: AccountViewModel,
     onChange: (FeedDefinition) -> Unit,
 ) {
-    val allLists by followListsModel.kind3GlobalPeopleRoutes.collectAsStateWithLifecycle()
+    val allLists by followListsModel.podcastRoutes.collectAsStateWithLifecycle()
 
     FeedFilterSpinner(
         placeholderCode = listName,