feat(highlights): highlight-a-note menu action; drop composer preview

- Add a "Highlight" action to the note action menu (3-dot menu + chat long-press
  sheet). It opens the NIP-84 composer pre-tagged with the note as source — an
  `a` reference for an addressable article, else an `e` reference, plus the
  author `p` — with the passage left for the user to type/paste. Prose kinds
  only (text notes, long-form), and never a private rumor (a public highlight
  would leak an e-tag of the unsigned rumor). This is the in-app entry point for
  "post with the source as an event".
- Remove the live preview from the New Highlight screen per review.
- Add two real-world regression tests for the shared-highlight parser: Chrome
  "copy link to highlight" with a prefix/suffix fragment (incl. an encoded
  hyphen inside the prefix) and a long start-only fragment with encoded commas.

Verified with :quartz:jvmTest and :amethyst:compileFdroidDebugKotlin.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/elements/NoteActionSections.kt

@@ -171,6 +171,25 @@ fun noteActionSections(
                     }
                 },
             )
+            // Highlight this note/article as its source: opens the NIP-84 composer with the
+            // nostr source pre-tagged (`a` for an addressable article, else `e`) plus the author,
+            // and the passage left for the user to type or paste. Prose kinds only, and never a
+            // private rumor (a public highlight would e-tag the unsigned rumor onto relays).
+            if (!isPrivateRumor && (note.event is TextNoteEvent || note.event is LongTextNoteEvent)) {
+                add(
+                    NoteAction(MaterialSymbols.FormatQuote, stringRes(R.string.highlight_action)) {
+                        val author = note.author?.pubkeyHex
+                        val route =
+                            if (note is AddressableNote) {
+                                Route.NewHighlight(sourceAddress = note.address.toValue(), author = author)
+                            } else {
+                                Route.NewHighlight(sourceEventId = note.idHex, author = author)
+                            }
+                        nav.nav(route)
+                        handlers.onDismiss()
+                    },
+                )
+            }
             if (!isPrivateRumor) {
                 add(NoteAction(MaterialSymbols.Share, stringRes(R.string.quick_action_share), onClick = handlers.onShare))
             }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/highlights/NewHighlightScreen.kt

@@ -66,7 +66,6 @@ import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.icons.symbols.Icon
 import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbol
 import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
-import com.vitorpamplona.amethyst.commons.ui.note.HighlightedQuote
 import com.vitorpamplona.amethyst.ui.navigation.navs.Nav
 import com.vitorpamplona.amethyst.ui.navigation.topbars.PostingTopBar
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
@@ -140,10 +139,6 @@ fun NewHighlightScreen(
                 onPassageChange = { postViewModel.quote = it },
             )
 
-            if (postViewModel.quote.isNotBlank()) {
-                HighlightPreview(passage = postViewModel.quote)
-            }
-
             IconField(
                 symbol = MaterialSymbols.Link,
                 value = postViewModel.url,
@@ -248,30 +243,6 @@ private fun HighlightEditorCard(
     }
 }
 
-/** A live render of the passage exactly as it will appear in the feed — the highlighter pen. */
-@Composable
-private fun HighlightPreview(passage: String) {
-    Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-        Text(
-            text = stringRes(R.string.new_highlight_preview_label),
-            style = MaterialTheme.typography.labelSmall,
-            color = MaterialTheme.colorScheme.onSurfaceVariant,
-        )
-        Surface(
-            shape = RoundedCornerShape(16.dp),
-            color = MaterialTheme.colorScheme.surface,
-            tonalElevation = 1.dp,
-            modifier = Modifier.fillMaxWidth(),
-        ) {
-            HighlightedQuote(
-                text = passage,
-                highlight = passage.indices,
-                modifier = Modifier.padding(16.dp),
-            )
-        }
-    }
-}
-
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 private fun IconField(

amethyst/src/main/res/values/strings.xml

@@ -2771,7 +2771,7 @@
     <string name="new_highlight_source_label">Source URL</string>
     <string name="new_highlight_note_label">Your note (optional)</string>
     <string name="new_highlight_note_placeholder">Add your thoughts…</string>
-    <string name="new_highlight_preview_label">Preview</string>
+    <string name="highlight_action">Highlight</string>
     <string name="copy_url_to_clipboard">Copy URL to clipboard</string>
     <string name="copy_the_note_id_to_the_clipboard">Copy Note ID to clipboard</string>
     <string name="add_media_to_gallery">Add Media to Gallery</string>

quartz/src/commonTest/kotlin/com/vitorpamplona/quartz/nip84Highlights/parse/SharedHighlightParserTest.kt

@@ -171,4 +171,40 @@ class SharedHighlightParserTest {
         assertNull(result.prefix)
         assertNull(result.suffix)
     }
+
+    @Test
+    fun realWorldChromeCopyLinkWithPrefixSuffixAndEncodedHyphen() {
+        // Chrome "copy link to highlight": a short selection with prefix/suffix anchors, and an
+        // encoded hyphen (%2D "pró-Irã") inside the prefix that must not be read as a delimiter.
+        val result =
+            SharedHighlightParser.parse(
+                "\"baseados\"\n https://g1.globo.com/mundo/noticia/2026/07/28/ira-rompe-tregua-e-lanca-misseis-balisticos-contra-bases-dos-eua-no-oriente-medio.ghtml" +
+                    "#:~:text=Saudita%20lan%C3%A7aram%20ataques%20em%20conjunto%20contra%20militantes%20pr%C3%B3%2DIr%C3%A3-,baseados,-no%20Iraque.",
+            )
+        assertEquals("baseados", result.quote)
+        assertEquals(
+            "https://g1.globo.com/mundo/noticia/2026/07/28/ira-rompe-tregua-e-lanca-misseis-balisticos-contra-bases-dos-eua-no-oriente-medio.ghtml",
+            result.url,
+        )
+        assertEquals("Saudita lançaram ataques em conjunto contra militantes pró-Irã", result.prefix)
+        assertEquals("no Iraque", result.suffix)
+    }
+
+    @Test
+    fun realWorldChromeCopyLinkStartOnlyWithEncodedCommas() {
+        // A long start-only fragment whose commas are encoded (%2C) so they don't split the
+        // directive, and whose apostrophe (’) inside the passage must survive quote-trimming.
+        val passage =
+            "cherish those corners. Geohot’s blog is one such corner that I rediscovered recently. " +
+                "Oh, what a joy to read something human from an actual human. His stuff makes me cry, laugh, and everything in"
+        val result =
+            SharedHighlightParser.parse(
+                "\"$passage\"\n https://dergigi.com/2026/07/28/typing/" +
+                    "#:~:text=cherish%20those%20corners.%20Geohot%E2%80%99s%20blog%20is%20one%20such%20corner%20that%20I%20rediscovered%20recently.%20Oh%2C%20what%20a%20joy%20to%20read%20something%20human%20from%20an%20actual%20human.%20His%20stuff%20makes%20me%20cry%2C%20laugh%2C%20and%20everything%20in",
+            )
+        assertEquals(passage, result.quote)
+        assertEquals("https://dergigi.com/2026/07/28/typing/", result.url)
+        assertNull(result.prefix)
+        assertNull(result.suffix)
+    }
 }