fix: honor Profile UI toggles in subscriptions and pager state

- Gate WatchLifecycleAndUpdateModel(appRecommendations) on the
  showProfileAppRecommendations toggle so the viewmodel no longer
  refreshes when the section is hidden.
- Thread loadFollowers / loadZapsReceived through UserProfileQueryState
  and the matching sub-assemblers. When the user hides those tabs,
  UserProfileFilterAssembler stops emitting their relay filters and
  the live REQs drop.
- Re-pin the profile pager to the tab the user was viewing whenever
  the visible-tabs list changes, using key(visibleTabs) +
  rememberPagerState(initialPage = ...) and a snapshotFlow that tracks
  the currently-viewed ProfileTab. Prevents the pager from silently
  shifting to a different tab when one is toggled off in settings.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/ProfileScreen.kt

@@ -46,10 +46,12 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.key
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
+import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.graphics.Color
@@ -288,15 +290,27 @@ fun ProfileScreen(
     accountViewModel: AccountViewModel,
     nav: INav,
 ) {
+    val ui = accountViewModel.settings.uiSettingsFlow
+    val showAppRecommendations by ui.showProfileAppRecommendations.collectAsStateWithLifecycle()
+    val showFollowersFeed by ui.showProfileFollowersFeed.collectAsStateWithLifecycle()
+    val showZapReceivedFeed by ui.showProfileZapReceivedFeed.collectAsStateWithLifecycle()
+
     WatchLifecycleAndUpdateModel(threadsViewModel)
     WatchLifecycleAndUpdateModel(repliesViewModel)
     WatchLifecycleAndUpdateModel(mutualViewModel)
-    WatchLifecycleAndUpdateModel(appRecommendations)
+    if (showAppRecommendations) {
+        WatchLifecycleAndUpdateModel(appRecommendations)
+    }
     WatchLifecycleAndUpdateModel(bookmarksFeedViewModel)
     WatchLifecycleAndUpdateModel(pinnedNotesFeedViewModel)
     WatchLifecycleAndUpdateModel(galleryFeedViewModel)
 
-    UserProfileFilterAssemblerSubscription(baseUser, accountViewModel.dataSources().profile)
+    UserProfileFilterAssemblerSubscription(
+        user = baseUser,
+        loadFollowers = showFollowersFeed,
+        loadZapsReceived = showZapReceivedFeed,
+        assembler = accountViewModel.dataSources().profile,
+    )
 
     val scrollState = rememberScrollState()
     val coroutineScope = rememberCoroutineScope()
@@ -461,54 +475,74 @@ private fun RenderScreen(
             }
         }
 
-    val pagerState = rememberPagerState(pageCount = { visibleTabs.size })
+    // Track the tab the user was viewing so we can re-pin to it when the
+    // visible-tabs list changes (e.g. they hid Followers from settings while
+    // standing on the Zaps tab).
+    var viewedTab by remember { mutableStateOf(visibleTabs.first()) }
 
-    Column {
-        ProfileHeader(baseUser, appRecommendations, externalIdentities, nav, accountViewModel)
-        SecondaryScrollableTabRow(
-            containerColor = Color.Transparent,
-            contentColor = MaterialTheme.colorScheme.onBackground,
-            selectedTabIndex = pagerState.currentPage,
-            edgePadding = Size8dp,
-            modifier = tabRowModifier,
-            divider = { HorizontalDivider(thickness = DividerThickness) },
-        ) {
-            CreateAndRenderTabs(
-                baseUser,
-                pagerState,
-                visibleTabs,
-                threadsViewModel,
-                repliesViewModel,
-                mutualViewModel,
-                followsFeedViewModel,
-                followersFeedViewModel,
-                zapFeedViewModel,
-                bookmarksFeedViewModel,
-                galleryFeedViewModel,
-                reportsFeedViewModel,
-                accountViewModel,
+    // key() rebuilds the pager state whenever the visible-tabs list changes,
+    // re-initializing it on the same tab the user was looking at.
+    key(visibleTabs) {
+        val pagerState =
+            rememberPagerState(
+                initialPage = visibleTabs.indexOf(viewedTab).coerceAtLeast(0),
+                pageCount = { visibleTabs.size },
             )
+
+        LaunchedEffect(pagerState, visibleTabs) {
+            snapshotFlow { pagerState.currentPage }
+                .collect { page ->
+                    visibleTabs.getOrNull(page)?.let { viewedTab = it }
+                }
         }
-        HorizontalPager(
-            state = pagerState,
-            modifier = pagerModifier,
-        ) { page ->
-            CreateAndRenderPages(
-                visibleTabs[page],
-                baseUser,
-                threadsViewModel,
-                repliesViewModel,
-                mutualViewModel,
-                followsFeedViewModel,
-                followersFeedViewModel,
-                zapFeedViewModel,
-                bookmarksFeedViewModel,
-                pinnedNotesFeedViewModel,
-                galleryFeedViewModel,
-                reportsFeedViewModel,
-                accountViewModel,
-                nav,
-            )
+
+        Column {
+            ProfileHeader(baseUser, appRecommendations, externalIdentities, nav, accountViewModel)
+            SecondaryScrollableTabRow(
+                containerColor = Color.Transparent,
+                contentColor = MaterialTheme.colorScheme.onBackground,
+                selectedTabIndex = pagerState.currentPage,
+                edgePadding = Size8dp,
+                modifier = tabRowModifier,
+                divider = { HorizontalDivider(thickness = DividerThickness) },
+            ) {
+                CreateAndRenderTabs(
+                    baseUser,
+                    pagerState,
+                    visibleTabs,
+                    threadsViewModel,
+                    repliesViewModel,
+                    mutualViewModel,
+                    followsFeedViewModel,
+                    followersFeedViewModel,
+                    zapFeedViewModel,
+                    bookmarksFeedViewModel,
+                    galleryFeedViewModel,
+                    reportsFeedViewModel,
+                    accountViewModel,
+                )
+            }
+            HorizontalPager(
+                state = pagerState,
+                modifier = pagerModifier,
+            ) { page ->
+                CreateAndRenderPages(
+                    visibleTabs[page],
+                    baseUser,
+                    threadsViewModel,
+                    repliesViewModel,
+                    mutualViewModel,
+                    followsFeedViewModel,
+                    followersFeedViewModel,
+                    zapFeedViewModel,
+                    bookmarksFeedViewModel,
+                    pinnedNotesFeedViewModel,
+                    galleryFeedViewModel,
+                    reportsFeedViewModel,
+                    accountViewModel,
+                    nav,
+                )
+            }
         }
     }
 }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/datasource/UserProfileFilterAssembler.kt

@@ -27,6 +27,8 @@ import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
 // This allows multiple screen to be listening to tags, even the same tag
 class UserProfileQueryState(
     val user: User,
+    val loadFollowers: Boolean,
+    val loadZapsReceived: Boolean,
 )
 
 class UserProfileFilterAssembler(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/datasource/UserProfileFilterAssemblerSubscription.kt

@@ -28,13 +28,15 @@ import com.vitorpamplona.amethyst.model.User
 @Composable
 fun UserProfileFilterAssemblerSubscription(
     user: User,
+    loadFollowers: Boolean,
+    loadZapsReceived: Boolean,
     assembler: UserProfileFilterAssembler,
 ) {
     // different screens get different states
     // even if they are tracking the same tag.
     val state =
-        remember(user) {
-            UserProfileQueryState(user)
+        remember(user, loadFollowers, loadZapsReceived) {
+            UserProfileQueryState(user, loadFollowers, loadZapsReceived)
         }
 
     LifecycleAwareKeyDataSourceSubscription(state, assembler)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/datasource/UserProfileFollowersFilterSubAssembler.kt

@@ -32,7 +32,12 @@ class UserProfileFollowersFilterSubAssembler(
     override fun updateFilter(
         key: UserProfileQueryState,
         since: SincePerRelayMap?,
-    ): List<RelayBasedFilter> = filterUserProfileFollowers(user(key), since)
+    ): List<RelayBasedFilter> =
+        if (key.loadFollowers) {
+            filterUserProfileFollowers(user(key), since)
+        } else {
+            emptyList()
+        }
 
     override fun user(key: UserProfileQueryState) = key.user
 }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/datasource/UserProfileZapsFilterSubAssembler.kt

@@ -33,9 +33,13 @@ class UserProfileZapsFilterSubAssembler(
         key: UserProfileQueryState,
         since: SincePerRelayMap?,
     ): List<RelayBasedFilter> =
-        listOfNotNull(
-            filterUserProfileZapsReceived(user(key), since),
-        ).flatten()
+        if (key.loadZapsReceived) {
+            listOfNotNull(
+                filterUserProfileZapsReceived(user(key), since),
+            ).flatten()
+        } else {
+            emptyList()
+        }
 
     override fun user(key: UserProfileQueryState) = key.user
 }