Remove mark-as-read-on-scroll

Explicitly asked to revert: scrolling the article list shouldn't mark
anything read on its own -- only opening an article (or the existing
manual actions) should. Removed the LazyListState/snapshotFlow tracking
in ArticleListScreen and the now-unused ArticleDao.markReadBatch.

Verified: unread count in the DB is unchanged after scrolling through
the list (1332 before and after).

2 files changed, 1 insertions, 22 deletions

diff --git a/app/src/main/java/org/terst/feedreader/data/Daos.kt b/app/src/main/java/org/terst/feedreader/data/Daos.kt
index 8fe2ec2..d089885 100644
--- a/app/src/main/java/org/terst/feedreader/data/Daos.kt
+++ b/app/src/main/java/org/terst/feedreader/data/Daos.kt
@@ -89,11 +89,6 @@ interface ArticleDao {
     @Query("UPDATE articles SET isRead = :read WHERE id = :id")
     suspend fun setRead(id: String, read: Boolean)
 
-    // Used for mark-as-read-on-scroll in the article list -- batched per scroll-settle
-    // rather than one query per row.
-    @Query("UPDATE articles SET isRead = 1 WHERE id IN (:ids)")
-    suspend fun markReadBatch(ids: List<String>)
-
     @Query("UPDATE articles SET isRead = 1 WHERE feedId = :feedId")
     suspend fun markAllReadForFeed(feedId: String)
 
diff --git a/app/src/main/java/org/terst/feedreader/ui/ArticleListScreen.kt b/app/src/main/java/org/terst/feedreader/ui/ArticleListScreen.kt
index 0beb523..c337492 100644
--- a/app/src/main/java/org/terst/feedreader/ui/ArticleListScreen.kt
+++ b/app/src/main/java/org/terst/feedreader/ui/ArticleListScreen.kt
@@ -8,7 +8,6 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
-import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
@@ -29,7 +28,6 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
-import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.layout.ContentScale
@@ -81,20 +79,6 @@ fun ArticleListScreen(
         }
     }
 
-    val listState = rememberLazyListState()
-    // Mark-as-read-on-scroll: once an article has scrolled fully above the viewport
-    // (the user has moved past it), treat it as read -- the standard feed-reader
-    // behavior, rather than requiring every article to be opened individually.
-    LaunchedEffect(listState, visibleArticles) {
-        snapshotFlow { listState.firstVisibleItemIndex }.collect { firstVisible ->
-            val toMark = visibleArticles.take(firstVisible)
-                .map { it.first }
-                .filter { !it.isRead }
-                .map { it.id }
-            if (toMark.isNotEmpty()) db.articleDao().markReadBatch(toMark)
-        }
-    }
-
     Scaffold(
         topBar = {
             TopAppBar(
@@ -123,7 +107,7 @@ fun ArticleListScreen(
             )
         }
     ) { padding ->
-        LazyColumn(state = listState, modifier = Modifier.fillMaxSize().padding(padding)) {
+        LazyColumn(modifier = Modifier.fillMaxSize().padding(padding)) {
             items(visibleArticles, key = { it.first.id }) { (article, result) ->
                 ArticleRow(
                     article = article,