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, 6 insertions, 19 deletions

diff --git a/app/src/main/java/org/terst/feedreader/ui/ShareReceiverActivity.kt b/app/src/main/java/org/terst/feedreader/ui/ShareReceiverActivity.kt
index 656bebc..1a383ae 100644
--- a/app/src/main/java/org/terst/feedreader/ui/ShareReceiverActivity.kt
+++ b/app/src/main/java/org/terst/feedreader/ui/ShareReceiverActivity.kt
@@ -22,13 +22,11 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 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.readability.ReaderExtractor
+import org.terst.feedreader.data.ensureStandaloneArticle
 import org.terst.feedreader.stash.StashClient
 import org.terst.feedreader.stash.StashSaveResult
-import java.security.MessageDigest
 
 private val URL_REGEX = Regex("""https?://\S+""")
 
@@ -63,29 +61,18 @@ private fun ShareReceiverContent(url: String?, onDone: () -> Unit) {
         if (url == null) return@LaunchedEffect
         val db = AppDatabase.get(context)
 
-        val extracted = ReaderExtractor.extract(context, url)
-        val id = MessageDigest.getInstance("SHA-256").digest(url.toByteArray()).joinToString("") { "%02x".format(it) }
-        db.articleDao().upsert(
-            ArticleEntity(
-                id = id,
-                feedId = null,
-                title = extracted?.title ?: url,
-                link = url,
-                extractedContent = extracted?.content,
-                isSaved = true,
-                createdAt = System.currentTimeMillis()
-            )
-        )
+        val entity = ensureStandaloneArticle(context, db, url)
+        if (!entity.isSaved) db.articleDao().setSaved(entity.id, true)
 
         val settings = Settings(context)
         val client = StashClient(Net.client, settings.stashBaseUrlNow(), settings.stashApiKeyNow())
-        status = when (val result = client.saveArticle(url, extracted?.title)) {
+        status = when (val result = client.saveArticle(url, entity.title)) {
             is StashSaveResult.Saved -> {
-                db.articleDao().setStashArtifactId(id, result.artifact.id)
+                db.articleDao().setStashArtifactId(entity.id, result.artifact.id)
                 "Saved for offline reading and archived to Stash"
             }
             is StashSaveResult.AlreadySaved -> {
-                db.articleDao().setStashArtifactId(id, result.existingId)
+                db.articleDao().setStashArtifactId(entity.id, result.existingId)
                 "Saved for offline reading (already in Stash)"
             }
             is StashSaveResult.Failed ->