Collapsible folders, long-press link menu, YouTube thumbnails, strip more Ars sequel chrome

- Feed list: folders now collapse (start collapsed, with a per-folder unread
  count so collapsing doesn't hide "is there anything new")
- Long-pressing a link inside an article shows an action menu (open in
  browser, share, save to Stash, save for later) instead of WebView's
  default text-selection popup -- confirmed live end to end, including the
  Stash/save-for-later paths creating a real standalone article
- New shared ensureStandaloneArticle() helper (data/ArticleSaving.kt),
  factored out of ShareReceiverActivity, now also used by the long-press menu
- YouTube iframe embeds become tap-to-open thumbnails (JS is off in the
  reader WebView, so the real player never worked anyway); tapping one goes
  straight to the YouTube app/browser instead of our own article-extraction
  pipeline
- Fixed back navigation through a chain of links-within-links: each hop was
  stacking a new backstack entry, so back stepped through the chain one link
  at a time instead of returning straight to the source article. Confirmed
  live: A -> link -> B -> link -> C, one back-press now goes straight to A
- Extended the <header> chrome-stripping from last round: also strip
  <footer>, an author bio card, and a "Most Read" trending-stories widget --
  confirmed live one of the latter showed up as a giant unrelated photo plus
  an empty numbered list (its lazy-loaded items never populate in this
  hidden, off-screen extraction WebView)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EZ7ikw2ukGJFTHE3bJS7zL

1 files changed, 44 insertions, 5 deletions

diff --git a/app/src/main/java/org/terst/feedreader/ui/LinkReaderScreen.kt b/app/src/main/java/org/terst/feedreader/ui/LinkReaderScreen.kt
index 4c7251f..c001b69 100644
--- a/app/src/main/java/org/terst/feedreader/ui/LinkReaderScreen.kt
+++ b/app/src/main/java/org/terst/feedreader/ui/LinkReaderScreen.kt
@@ -46,14 +46,12 @@ import org.terst.feedreader.data.AppDatabase
 import org.terst.feedreader.data.ArticleEntity
 import org.terst.feedreader.data.Net
 import org.terst.feedreader.data.Settings
+import org.terst.feedreader.data.ensureStandaloneArticle
+import org.terst.feedreader.data.urlToArticleId
 import org.terst.feedreader.readability.ReaderExtractor
 import org.terst.feedreader.stash.StashClient
 import org.terst.feedreader.stash.StashSaveResult
 import java.net.URLEncoder
-import java.security.MessageDigest
-
-private fun urlToArticleId(url: String): String =
-    MessageDigest.getInstance("SHA-256").digest(url.toByteArray()).joinToString("") { "%02x".format(it) }
 
 /**
  * A reader view for links tapped inside an article's WebView -- extracts the linked
@@ -83,6 +81,7 @@ fun LinkReaderScreen(url: String, onBack: () -> Unit, onOpenLink: (String) -> Un
     var isReaderMode by remember(url) { mutableStateOf(true) }
     var isSaving by remember(url) { mutableStateOf(false) }
     var moreMenuExpanded by remember(url) { mutableStateOf(false) }
+    var longPressedLink by remember(url) { mutableStateOf<String?>(null) }
 
     LaunchedEffect(url) {
         val existing = db.articleDao().getById(articleId)
@@ -223,7 +222,7 @@ fun LinkReaderScreen(url: String, onBack: () -> Unit, onOpenLink: (String) -> Un
                     AndroidView(
                         modifier = Modifier.fillMaxSize(),
                         factory = { ctx ->
-                            newReaderWebView(ctx, onOpenLink).apply {
+                            newReaderWebView(ctx, onOpenLink, onLongPressLink = { longPressedLink = it }).apply {
                                 loadDataWithBaseURL(url, wrapReaderHtml(currentExtractedContent, extractedTitle), "text/html", "UTF-8", null)
                                 loadedContent.value = currentExtractedContent
                             }
@@ -255,5 +254,45 @@ fun LinkReaderScreen(url: String, onBack: () -> Unit, onOpenLink: (String) -> Un
                 else -> CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
             }
         }
+        longPressedLink?.let { linkUrl ->
+            LinkActionsDialog(
+                url = linkUrl,
+                onDismiss = { longPressedLink = null },
+                onOpenInBrowser = { context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(linkUrl))) },
+                onShare = {
+                    val send = Intent(Intent.ACTION_SEND).apply {
+                        type = "text/plain"
+                        putExtra(Intent.EXTRA_TEXT, linkUrl)
+                    }
+                    context.startActivity(Intent.createChooser(send, null))
+                },
+                onSaveToStash = {
+                    scope.launch {
+                        val entity = ensureStandaloneArticle(context, db, linkUrl)
+                        val settings = Settings(context)
+                        val client = StashClient(Net.client, settings.stashBaseUrlNow(), settings.stashApiKeyNow())
+                        when (val result = client.saveArticle(linkUrl, entity.title)) {
+                            is StashSaveResult.Saved -> {
+                                db.articleDao().setStashArtifactId(entity.id, result.artifact.id)
+                                snackbarHostState.showSnackbar("Saved to Stash")
+                            }
+                            is StashSaveResult.AlreadySaved -> {
+                                db.articleDao().setStashArtifactId(entity.id, result.existingId)
+                                snackbarHostState.showSnackbar("Already in Stash")
+                            }
+                            is StashSaveResult.Failed ->
+                                snackbarHostState.showSnackbar("Save failed: ${result.message}")
+                        }
+                    }
+                },
+                onSaveForLater = {
+                    scope.launch {
+                        val entity = ensureStandaloneArticle(context, db, linkUrl)
+                        if (!entity.isSaved) db.articleDao().setSaved(entity.id, true)
+                        snackbarHostState.showSnackbar("Saved for later")
+                    }
+                }
+            )
+        }
     }
 }