Fix ShareExtension "Open Marks first" + add widget + BookmarkListRow polish

- Save serverConfig to App Group on every app launch so ShareExtension
  can always find credentials without requiring a disconnect/reconnect flow
- Add MarksWidget target with RandomBookmarkWidget (random saved bookmark,
  reloads hourly) using file-based App Group storage to avoid CFPreferences issues
- Extract BookmarkListRow as shared component with editorial typography tweaks
  (17pt semibold title, 13pt domain, relative date, 32×32 favicon, italic AI summary,
  20pt podcast icon, 16pt horizontal insets)
- Add MarksWidget and ShareExtension Xcode schemes for direct run/debug

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

Marks/Views/SearchView.swift

@@ -2,30 +2,22 @@ import SwiftUI
 
 struct SearchView: View {
     @Bindable var viewModel: BookmarksViewModel
-    @Environment(\.openURL) private var openURL
 
     @State private var searchText = ""
     @State private var useSemanticSearch = false
     @State private var semanticResults: [Bookmark]? = nil
     @State private var searchTask: Task<Void, Never>?
+    @State private var browsingBookmark: Bookmark?
 
     var body: some View {
         NavigationStack {
             List {
                 ForEach(results) { bookmark in
-                    BookmarkRow(bookmark: bookmark)
-                        .onTapGesture {
-                            if let url = URL(string: bookmark.url) { openURL(url) }
-                        }
-                        .listRowInsets(EdgeInsets(top: 0, leading: 20, bottom: 0, trailing: 20))
-                        .listRowSeparator(.visible)
-                        .swipeActions(edge: .trailing, allowsFullSwipe: true) {
-                            Button(role: .destructive) {
-                                Task { await viewModel.delete(bookmark) }
-                            } label: {
-                                Label("Delete", systemImage: "trash")
-                            }
-                        }
+                    BookmarkListRow(
+                        bookmark: bookmark,
+                        viewModel: viewModel,
+                        onOpen: { browsingBookmark = bookmark }
+                    )
                 }
             }
             .listStyle(.plain)
@@ -49,6 +41,19 @@ struct SearchView: View {
                     ProgressView()
                 }
             }
+            .sensoryFeedback(.selection, trigger: browsingBookmark?.id)
+            .sheet(item: $browsingBookmark) { bookmark in
+                if let url = URL(string: bookmark.url) {
+                    BrowserView(
+                        url: url,
+                        title: bookmark.displayTitle,
+                        claude: viewModel.claude,
+                        podcastPlayer: viewModel.podcastPlayer
+                    ) {
+                        await viewModel.archive(bookmark)
+                    }
+                }
+            }
         }
         .searchable(text: $searchText, prompt: "Titles, URLs, tags…")
         .onChange(of: searchText) { _, _ in scheduleSearch() }