fix(library): name nested directory entries, and read the schema.org spelling

Two things a real bookshelf turned up.

**A nested directory read "Untitled section".** `Library.kt` reuses
`PublicationSectionRow`, whose title `when` knew only the publication kinds, so a
directory listing another directory fell to `else -> null` and then to the
section placeholder -- both the wrong name and the wrong noun. A directory lists
whatever it likes, so the row now names the library kinds too, learning resources
and piece indexes included.

**A learning resource read as its `d` slug.** `title()` looked only at `title`,
but publishers that tag themselves `type: LearningResource` follow schema.org and
emit `name`/`description`. Both spellings are accepted now, `title`/`summary`
winning where an event carries both, so nothing that renders today changes.

Not a bug, checked and left alone: Laeserin's directory shows `my-book-collection`
because that event carries no `title` *or* `name` at all -- the `d` fallback is
the right answer there.

Verified on device against the same two events that showed the defects: entry 3
of `my-book-collection` now reads "nostr" instead of "Untitled section", and the
German resource reads "Caesar-Scheibe - 30 Buchstaben: A-Z plus Ae Oe Ue ss"
instead of "17xu8qb7". Two tests added for the vocabulary split, including the
precedence case; LibraryEventsTest 11/11 green.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wwk8tDEaEvsNoGbtrjZavz

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/Publication.kt

@@ -73,6 +73,9 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.stringRes
 import com.vitorpamplona.amethyst.ui.theme.Size5dp
 import com.vitorpamplona.amethyst.ui.theme.grayText
+import com.vitorpamplona.quartz.experimental.library.BlossomPieceIndexEvent
+import com.vitorpamplona.quartz.experimental.library.BookshelfDirectoryEvent
+import com.vitorpamplona.quartz.experimental.library.LearningResourceEvent
 import com.vitorpamplona.quartz.experimental.publications.PublicationContentEvent
 import com.vitorpamplona.quartz.experimental.publications.PublicationIndexEvent
 import com.vitorpamplona.quartz.experimental.publications.PublicationSectionRef
@@ -335,6 +338,12 @@ private fun ObservedSectionRow(
             is PublicationContentEvent -> event.titleOrIdentifier()
             is LongTextNoteEvent -> event.title()
             is WikiNoteEvent -> event.title()
+            // A bookshelf directory lists whatever it likes, including another directory, so the
+            // row has to name the library kinds too -- otherwise a nested entry falls through to
+            // the section placeholder and reads "Untitled section", which it is not.
+            is BookshelfDirectoryEvent -> event.titleOrIdentifier()
+            is LearningResourceEvent -> event.titleOrIdentifier()
+            is BlossomPieceIndexEvent -> event.titleOrIdentifier()
             else -> null
         } ?: ref.title
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/experimental/library/LearningResourceEvent.kt

@@ -33,6 +33,8 @@ import com.vitorpamplona.quartz.nip23LongContent.tags.ImageTag
 import com.vitorpamplona.quartz.nip23LongContent.tags.SummaryTag
 import com.vitorpamplona.quartz.nip23LongContent.tags.TitleTag
 import com.vitorpamplona.quartz.nip50Search.SearchableEvent
+import com.vitorpamplona.quartz.nip51Lists.tags.DescriptionTag
+import com.vitorpamplona.quartz.nip51Lists.tags.NameTag
 import com.vitorpamplona.quartz.utils.TimeUtils
 
 /**
@@ -55,9 +57,15 @@ class LearningResourceEvent(
     SearchableEvent {
     override fun indexableContent() = listOfNotNull(title(), summary(), content).joinToString("\n")
 
-    fun title() = tags.firstNotNullOfOrNull(TitleTag::parse)
+    /**
+     * Publishers split on which vocabulary they use: most emit `title`/`summary`, but the ones
+     * that tag themselves `type: LearningResource` follow schema.org and emit `name`/`description`
+     * instead. Reading only the first spelling left those rendering as their `d` slug, so both are
+     * accepted with `title`/`summary` winning where an event carries both.
+     */
+    fun title() = tags.firstNotNullOfOrNull(TitleTag::parse) ?: tags.firstNotNullOfOrNull(NameTag::parse)
 
-    fun summary() = tags.firstNotNullOfOrNull(SummaryTag::parse)
+    fun summary() = tags.firstNotNullOfOrNull(SummaryTag::parse) ?: tags.firstNotNullOfOrNull(DescriptionTag::parse)
 
     fun image() = tags.firstNotNullOfOrNull(ImageTag::parse)
 

quartz/src/commonTest/kotlin/com/vitorpamplona/quartz/experimental/library/LibraryEventsTest.kt

@@ -65,6 +65,53 @@ class LibraryEventsTest {
         assertEquals("Intro to Nostr\nThe basics.\nLesson one.", event.indexableContent())
     }
 
+    @Test
+    fun aLearningResourceReadsTheSchemaOrgNameAndDescription() {
+        // The `type: LearningResource` publishers emit schema.org's spelling. Shape taken from a
+        // real event (`4fa5d1c4...`, d=17xu8qb7), which rendered as its slug before this.
+        val event =
+            LearningResourceEvent(
+                "id",
+                author,
+                0L,
+                arrayOf(
+                    arrayOf("d", "17xu8qb7"),
+                    arrayOf("type", "LearningResource"),
+                    arrayOf("name", "Caesar-Scheibe"),
+                    arrayOf("description", "Eine Anleitung."),
+                ),
+                "Body.",
+                "sig",
+            )
+
+        assertEquals("Caesar-Scheibe", event.title())
+        assertEquals("Eine Anleitung.", event.summary())
+        assertEquals("Caesar-Scheibe", event.titleOrIdentifier())
+        assertEquals("Caesar-Scheibe\nEine Anleitung.\nBody.", event.indexableContent())
+    }
+
+    @Test
+    fun titleAndSummaryWinOverNameAndDescription() {
+        val event =
+            LearningResourceEvent(
+                "id",
+                author,
+                0L,
+                arrayOf(
+                    arrayOf("d", "both"),
+                    arrayOf("title", "Preferred"),
+                    arrayOf("name", "Ignored"),
+                    arrayOf("summary", "Preferred summary."),
+                    arrayOf("description", "Ignored description."),
+                ),
+                "",
+                "sig",
+            )
+
+        assertEquals("Preferred", event.title())
+        assertEquals("Preferred summary.", event.summary())
+    }
+
     @Test
     fun aLearningResourceFallsBackToItsIdentifier() {
         val event = LearningResourceEvent("id", author, 0L, arrayOf(arrayOf("d", "untitled-course")), "", "sig")