Messages tab: Chats/Groups section headings

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/src/main/kotlin/io/flamenet/messenger/app/MessagesScreen.kt

@@ -83,8 +83,26 @@ fun ColumnScope.MessagesScreen(
     Divider()
     Spacer(Modifier.height(Space.sm))
 
-    // The kit's listing holds every conversation — groups included.
+    // The kit's listing holds every conversation — groups included. Two kinds
+    // of thing share the list, so each gets the kit's muted label.
+    Text(
+        "GROUPS",
+        fontSize = 12.sp,
+        fontWeight = FontWeight.Medium,
+        color = Palette.SecondaryText,
+        letterSpacing = androidx.compose.ui.unit.TextUnit(
+            0.8f, androidx.compose.ui.unit.TextUnitType.Sp),
+    )
     GroupsSection(model, phase, query.value, creatingGroup.value) { creatingGroup.value = it }
+    Spacer(Modifier.height(Space.sm))
+    Text(
+        "CHATS",
+        fontSize = 12.sp,
+        fontWeight = FontWeight.Medium,
+        color = Palette.SecondaryText,
+        letterSpacing = androidx.compose.ui.unit.TextUnit(
+            0.8f, androidx.compose.ui.unit.TextUnitType.Sp),
+    )
 
     val shown = phase.buddies
         .filter {