Add Master Volume slider, status bar toggle, and toolbar customization menu

The toolbar now has a right-click menu to hide/show the status bar and
a short Master Volume slider (drag or scroll) that multiplies both
voice and notification volume via new Settings.effectiveOutputVolume()/
effectiveSoundVolume() helpers.

Also splits MainFrame's toolbar, menu bar and status bar construction
into their own MainToolbar/MainMenuBar/StatusBar classes, each talking
back to MainFrame only through a Listener interface.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

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

@@ -0,0 +1,155 @@
+package com.ts3client.ui;
+
+import com.ts3client.config.Bookmark;
+import com.ts3client.config.Bookmarks;
+
+import javax.swing.JCheckBoxMenuItem;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.KeyStroke;
+
+/**
+ * The main window's menu bar: Connections, Bookmarks, Self, Tools and Help.
+ * Talks to {@link MainFrame} only through {@link Listener}; the away/commander
+ * item states are pushed in by {@link #refresh}, mirroring how {@link MainToolbar}
+ * is kept in sync.
+ */
+final class MainMenuBar extends JMenuBar {
+
+    interface Listener {
+        void onConnect();
+
+        void onDisconnect();
+
+        void onCloseTab();
+
+        void onQuit();
+
+        void onToggleMic();
+
+        void onToggleSpeaker();
+
+        /** The plain toggle carries no message; "Set away status…" is where messages are chosen. */
+        void onAwayToggle(boolean away);
+
+        void onAwayStatus();
+
+        void onCommanderToggle(boolean commander);
+
+        void onChangeNickname();
+
+        void onShowIdentities();
+
+        void onShowSettings();
+
+        void onShowAbout();
+
+        void onConnectBookmark(Bookmark bookmark);
+
+        void onAddCurrentServerBookmark();
+
+        void onManageBookmarks();
+    }
+
+    private final Bookmarks bookmarks;
+    private final Listener listener;
+
+    private JMenu bookmarksMenu;
+    private JCheckBoxMenuItem awayItem;
+    private JMenuItem awayStatusItem;
+    private JCheckBoxMenuItem commanderItem;
+
+    MainMenuBar(Bookmarks bookmarks, Listener listener) {
+        this.bookmarks = bookmarks;
+        this.listener = listener;
+
+        JMenu connections = new JMenu("Connections");
+        JMenuItem connect = new JMenuItem("Connect…", Icons.of("CONNECT"));
+        connect.setAccelerator(KeyStroke.getKeyStroke("control S"));
+        connect.addActionListener(e -> listener.onConnect());
+        JMenuItem disconnect = new JMenuItem("Disconnect", Icons.of("DISCONNECT"));
+        disconnect.addActionListener(e -> listener.onDisconnect());
+        JMenuItem closeTab = new JMenuItem("Close tab", Icons.of("CLOSE_BUTTON"));
+        closeTab.setAccelerator(KeyStroke.getKeyStroke("control W"));
+        closeTab.addActionListener(e -> listener.onCloseTab());
+        JMenuItem quit = new JMenuItem("Quit", Icons.of("QUIT"));
+        quit.addActionListener(e -> listener.onQuit());
+        connections.add(connect);
+        connections.add(disconnect);
+        connections.add(closeTab);
+        connections.addSeparator();
+        connections.add(quit);
+
+        bookmarksMenu = new JMenu("Bookmarks");
+        rebuildBookmarks();
+
+        JMenu self = new JMenu("Self");
+        JMenuItem mute = new JMenuItem("Toggle microphone", Icons.of("CAPTURE"));
+        mute.addActionListener(e -> listener.onToggleMic());
+        JMenuItem deaf = new JMenuItem("Toggle speakers", Icons.of("PLAYBACK"));
+        deaf.addActionListener(e -> listener.onToggleSpeaker());
+        awayItem = new JCheckBoxMenuItem("Away", Icons.of("AWAY"), false);
+        awayItem.addActionListener(e -> listener.onAwayToggle(awayItem.isSelected()));
+        awayStatusItem = new JMenuItem("Set away status…", Icons.of("EDIT"));
+        awayStatusItem.addActionListener(e -> listener.onAwayStatus());
+        commanderItem = new JCheckBoxMenuItem("Channel commander", Icons.of("CHANNEL_COMMANDER"), false);
+        commanderItem.addActionListener(e -> listener.onCommanderToggle(commanderItem.isSelected()));
+        JMenuItem nick = new JMenuItem("Change nickname…", Icons.of("CHANGE_NICKNAME"));
+        nick.addActionListener(e -> listener.onChangeNickname());
+        self.add(mute);
+        self.add(deaf);
+        self.addSeparator();
+        self.add(awayItem);
+        self.add(awayStatusItem);
+        self.add(commanderItem);
+        self.addSeparator();
+        self.add(nick);
+
+        JMenu tools = new JMenu("Tools");
+        JMenuItem identitiesItem = new JMenuItem("Identities…", Icons.of("IDENTITY_MANAGER"));
+        identitiesItem.addActionListener(e -> listener.onShowIdentities());
+        JMenuItem options = new JMenuItem("Options…", Icons.of("SETTINGS"));
+        options.addActionListener(e -> listener.onShowSettings());
+        tools.add(identitiesItem);
+        tools.addSeparator();
+        tools.add(options);
+
+        JMenu help = new JMenu("Help");
+        JMenuItem about = new JMenuItem("About", Icons.of("ABOUT"));
+        about.addActionListener(e -> listener.onShowAbout());
+        help.add(about);
+
+        add(connections);
+        add(bookmarksMenu);
+        add(self);
+        add(tools);
+        add(help);
+    }
+
+    /** Reflects the current tab's away/commander state on the menu items. */
+    void refresh(boolean connected, boolean away, boolean commander) {
+        awayItem.setEnabled(connected);
+        awayStatusItem.setEnabled(connected);
+        commanderItem.setEnabled(connected);
+        awayItem.setSelected(away);
+        commanderItem.setSelected(commander);
+    }
+
+    /** Re-lists the saved bookmarks; called after they change (add, remove, manage…). */
+    void rebuildBookmarks() {
+        bookmarksMenu.removeAll();
+        for (Bookmark b : bookmarks.all()) {
+            JMenuItem item = new JMenuItem(b.displayName(), Icons.of("SERVER_GREEN"));
+            item.addActionListener(e -> listener.onConnectBookmark(b));
+            bookmarksMenu.add(item);
+        }
+        if (!bookmarks.all().isEmpty()) bookmarksMenu.addSeparator();
+        JMenuItem addCurrent = new JMenuItem("Add current server…", Icons.of("BOOKMARK_ADD"));
+        addCurrent.addActionListener(e -> listener.onAddCurrentServerBookmark());
+        JMenuItem manage = new JMenuItem("Manage bookmarks…", Icons.of("BOOKMARK_MANAGER"));
+        manage.addActionListener(e -> listener.onManageBookmarks());
+        bookmarksMenu.add(addCurrent);
+        bookmarksMenu.add(manage);
+    }
+}