Add mini-player, per-row podcast button, and resume-from-position

- MiniPlayerView: persistent bar above tab bar, shows title/progress,
  play/pause and close buttons, slides in when audio starts
- PodcastPlayerViewModel lifted to BookmarksViewModel so it persists
  across sheet dismissals — audio keeps playing in background
- Headphone button on every bookmark row (filled = cached, outline = not)
- start() is idempotent: re-tapping same article resumes without restart
- stop() saves playback position before teardown (PodcastProgress)
- setupPlayer restores saved position on next open
- BrowserView keeps its own local VM (stopOnDismiss: true)

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

Marks/Views/BookmarksView.swift

@@ -10,17 +10,28 @@ struct BookmarksView: View {
     @State private var showAddBookmark = false
     @State private var editingBookmark: Bookmark?
     @State private var browsingBookmark: Bookmark?
-    @State private var podcastBookmark: Bookmark?
+    @State private var showFullPlayer = false
     @State private var readingProgress: [String: Double] = ReadingProgress.all()
 
     var body: some View {
         NavigationStack {
             List {
                 ForEach(viewModel.bookmarks) { bookmark in
-                    BookmarkRow(bookmark: bookmark, readingProgress: readingProgress[bookmark.url] ?? 0)
-                        .onTapGesture {
-                            browsingBookmark = bookmark
+                    BookmarkRow(
+                        bookmark: bookmark,
+                        readingProgress: readingProgress[bookmark.url] ?? 0,
+                        onPodcast: {
+                            viewModel.podcastPlayer.start(
+                                articleUrl: bookmark.url,
+                                articleTitle: bookmark.displayTitle,
+                                claude: viewModel.claude
+                            )
+                            showFullPlayer = true
                         }
+                    )
+                    .onTapGesture {
+                        browsingBookmark = bookmark
+                    }
                         .onAppear { maybeLoadMore(bookmark) }
                         .listRowInsets(EdgeInsets(top: 0, leading: 20, bottom: 0, trailing: 20))
                         .listRowSeparator(.visible)
@@ -62,7 +73,12 @@ struct BookmarksView: View {
                                 Label("Open in Safari", systemImage: "safari")
                             }
                             Button {
-                                podcastBookmark = bookmark
+                                viewModel.podcastPlayer.start(
+                                    articleUrl: bookmark.url,
+                                    articleTitle: bookmark.displayTitle,
+                                    claude: viewModel.claude
+                                )
+                                showFullPlayer = true
                             } label: {
                                 Label("Convert to Podcast", systemImage: "headphones")
                             }
@@ -133,9 +149,19 @@ struct BookmarksView: View {
                 }
             }
             .overlay(alignment: .bottom) {
-                if viewModel.enrichmentProgress > 0 {
-                    enrichmentBanner
+                VStack(spacing: 8) {
+                    if viewModel.podcastPlayer.player != nil {
+                        MiniPlayerView(vm: viewModel.podcastPlayer) {
+                            showFullPlayer = true
+                        }
+                        .transition(.move(edge: .bottom).combined(with: .opacity))
+                    }
+                    if viewModel.enrichmentProgress > 0 {
+                        enrichmentBanner
+                    }
                 }
+                .animation(.spring(duration: 0.3), value: viewModel.podcastPlayer.player != nil)
+                .padding(.bottom, 8)
             }
         }
         .sheet(isPresented: $showSettings) {
@@ -158,8 +184,14 @@ struct BookmarksView: View {
         .onChange(of: browsingBookmark) { _, new in
             if new == nil { readingProgress = ReadingProgress.all() }
         }
-        .sheet(item: $podcastBookmark) { bookmark in
-            PodcastPlayerView(articleUrl: bookmark.url, claude: viewModel.claude)
+        .sheet(isPresented: $showFullPlayer) {
+            PodcastPlayerView(
+                vm: viewModel.podcastPlayer,
+                articleUrl: viewModel.podcastPlayer.currentArticleUrl,
+                articleTitle: viewModel.podcastPlayer.currentArticleTitle,
+                claude: viewModel.claude,
+                stopOnDismiss: false
+            )
         }
         .refreshable {
             await viewModel.load()
@@ -193,7 +225,6 @@ struct BookmarksView: View {
         .background(.regularMaterial)
         .clipShape(RoundedRectangle(cornerRadius: 12))
         .padding(.horizontal, 16)
-        .padding(.bottom, 8)
     }
 
     private func maybeLoadMore(_ bookmark: Bookmark) {