fix(thread): restore long-press on root note + anchor popup to the card

Two related fixes to the thread quick-action popup:

- ThreadFeedView.FullBleedNoteCompose declared a `modifier` parameter
  that NoteMaster used to attach `combinedClickable(onLongClick = showPopup)`,
  but the body built a fresh `Modifier.fillMaxWidth().padding(top = 10.dp)`
  for its root Column and discarded the incoming modifier. Long-press on
  the root note in thread view never fired. Spread the incoming modifier
  onto the Column.

- LongPressToQuickAction emitted the Popup as a sibling of the content
  with no wrapping layout. The Popup's `parentLayoutCoordinates` then
  resolved to the enclosing LazyColumn, so `alignment = Alignment.Center`
  centered the menu on the whole list (visually middle of the screen)
  instead of the long-pressed card. Wrap content + Popup in a Box so the
  popup's parent bounds match the note card.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteQuickActionMenu.kt

@@ -24,6 +24,7 @@ import android.content.Intent
 import android.widget.Toast
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.IntrinsicSize
 import androidx.compose.foundation.layout.PaddingValues
@@ -136,15 +137,19 @@ fun LongPressToQuickAction(
 ) {
     val popupExpanded = remember { mutableStateOf(false) }
 
-    content { popupExpanded.value = true }
+    // Box anchors the Popup to the note card; otherwise its parent resolves to the
+    // enclosing LazyColumn and `Alignment.Center` centers on the whole list.
+    Box {
+        content { popupExpanded.value = true }
 
-    if (popupExpanded.value) {
-        NoteQuickActionMenu(
-            note = baseNote,
-            onDismiss = { popupExpanded.value = false },
-            accountViewModel = accountViewModel,
-            nav = nav,
-        )
+        if (popupExpanded.value) {
+            NoteQuickActionMenu(
+                note = baseNote,
+                onDismiss = { popupExpanded.value = false },
+                accountViewModel = accountViewModel,
+                nav = nav,
+            )
+        }
     }
 }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/threadview/ThreadFeedView.kt

@@ -483,7 +483,7 @@ private fun FullBleedNoteCompose(
         )
 
     Column(
-        Modifier
+        modifier
             .fillMaxWidth()
             .padding(top = 10.dp),
     ) {