Move client tag display from feed to note detail view

Remove client tag from EventTop (feed header) and display it inline
next to the timestamp in SelectedEventView instead. Removes unused
ClientTagLabel struct. Applies lineLimit(1) with tail truncation to
guard against unbounded client tag names.

Closes: https://github.com/damus-io/damus/issues/3672
Signed-off-by: alltheseas

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

damus/Features/Events/Components/EventTop.swift

@@ -35,10 +35,7 @@ struct EventTop: View {
             ProfileName(is_anon: is_anon)
             TimeDot()
             RelativeTime(time: state.events.get_cache_data(event.id).relative_time, size: size, font_size: state.settings.font_size)
-            if let clientTag = event.clientTag {
+
-                TimeDot()
-                ClientTagLabel(clientTag: clientTag, size: size, font_size: state.settings.font_size)
-            }
             Spacer()
             if !options.contains(.no_context_menu) {
                 EventMenuContext(damus: state, event: event)
@@ -53,17 +50,3 @@ struct EventTop_Previews: PreviewProvider {
         EventTop(state: test_damus_state, event: test_note, pubkey: test_note.pubkey, is_anon: false, size: .normal, options: [])
     }
 }
-
-/// Displays the client name that published an event (e.g., "via Damus").
-struct ClientTagLabel: View {
-    let clientTag: ClientTagMetadata
-    let size: EventViewKind
-    let font_size: Double
-
-    var body: some View {
-        Text(String(format: NSLocalizedString("via %@", comment: "Label indicating which client published the event"), clientTag.name))
-            .font(eventviewsize_to_font(size, font_size: font_size))
-            .foregroundColor(.gray)
-            .lineLimit(1)
-    }
-}

damus/Features/Events/SelectedEventView.swift

@@ -58,10 +58,19 @@ struct SelectedEventView: View {
 
                 Mention
                 
+                HStack {
                     Text(verbatim: "\(format_date(created_at: event.created_at))")
-                    .padding([.top, .leading, .trailing])
                         .font(.footnote)
                         .foregroundColor(.gray)
+                    if let clientTag = event.clientTag {
+                        Text(String(format: NSLocalizedString("via %@", comment: "Label indicating which client published the event"), clientTag.name))
+                            .font(.footnote)
+                            .foregroundColor(.gray)
+                            .lineLimit(1)
+                            .truncationMode(.tail)
+                    }
+                }
+                .padding([.top, .leading, .trailing])
                 
                 Divider()
                     .padding([.bottom], 4)