Import bookmarks and identities from the TeamSpeak 3 client

The official client keeps what a myTeamSpeak account synchronises as protobuf
Item_Data blobs in the ProtobufItems table of settings.db. Decode them, adopt
them on first run when we have no identity yet, and offer a re-import from
Manage Bookmarks and Identities. The settings.db reader moves from contacts to
a new teamspeak package.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ts3-client/swing/src/main/java/com/ts3client/ui/MainFrame.java

@@ -8,6 +8,7 @@ import com.ts3client.config.Bookmark;
 import com.ts3client.config.Bookmarks;
 import com.ts3client.config.IdentityStore;
 import com.ts3client.config.Settings;
+import com.ts3client.teamspeak.TeamSpeakImporter;
 import com.ts3client.contacts.ContactStore;
 import com.ts3client.net.ChannelNode;
 import com.ts3client.sound.SoundNotifier;
@@ -85,6 +86,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         super("TS3J — TeamSpeak 3 Java Client");
         this.settings = settings;
         this.identities = IdentityStore.load(settings);
+        new TeamSpeakImporter(identities, bookmarks, settings).seedIfFresh();
         this.sounds = new SoundNotifier(settings);
         this.soundPlayer = audio.createSoundPlayer(settings);
         this.sounds.setPlayer(soundPlayer);
@@ -235,7 +237,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
 
             @Override
             public void onManageBookmarks() {
-                new BookmarksDialog(MainFrame.this, bookmarks, identities,
+                new BookmarksDialog(MainFrame.this, bookmarks, identities, settings,
                         MainFrame.this::connectToBookmark, menuBar::rebuildBookmarks).setVisible(true);
             }
         });