ios: add multi-polling support

ios/Packages/Sybil/Sources/Sybil/SybilSidebarView.swift

@@ -104,6 +104,13 @@ struct SybilSidebarView: View {
                                         Text(item.title)
                                             .font(.sybil(.subheadline, weight: .semibold))
                                             .lineLimit(1)
+                                            .layoutPriority(1)
+
+                                        Spacer(minLength: 8)
+
+                                        if item.isRunning {
+                                            SybilSidebarActivityIndicator()
+                                        }
                                     }
 
                                     HStack(spacing: 8) {
@@ -205,3 +212,15 @@ struct SybilSidebarView: View {
         .buttonStyle(.plain)
     }
 }
+
+struct SybilSidebarActivityIndicator: View {
+    var body: some View {
+        ProgressView()
+            .progressViewStyle(.circular)
+            .controlSize(.small)
+            .tint(SybilTheme.accent)
+            .scaleEffect(0.82)
+            .frame(width: 16, height: 16)
+            .accessibilityLabel("Generating")
+    }
+}