Global hotkeys, in TeamSpeak's own shape

Bindings are captured system-wide rather than only while the window has
focus: X11's RECORD extension where the X server sees every key, and a
/dev/input reader as the Wayland fallback. Any key can act as a modifier,
mouse buttons included, as TS3 allows.

The action catalogue, its three categories and the "advanced actions"
split are reverse-engineered from the original client; actions this
client cannot perform are listed but greyed out. Push-to-talk becomes one
of these hotkeys, so the old focus-bound pushToTalkKey setting is gone and
the Voice Activation button edits that binding instead.

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

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

@@ -0,0 +1,170 @@
+package com.ts3client.ui;
+
+import com.ts3client.hotkey.Hotkey;
+
+import javax.swing.BorderFactory;
+import javax.swing.JButton;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTable;
+import javax.swing.ListSelectionModel;
+import javax.swing.SwingUtilities;
+import javax.swing.table.AbstractTableModel;
+import java.awt.BorderLayout;
+import java.awt.Font;
+import java.awt.Window;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The options dialog's hotkey tab: the list of bindings with the buttons to add, edit
+ * and remove them. Edits happen on a working copy and only reach the running engine
+ * when the dialog is applied.
+ */
+final class HotkeysPanel extends JPanel {
+
+    private static final String[] COLUMNS = {"Action", "Hotkey", "Trigger", "Active server", "On"};
+
+    private final HotkeyService service;
+    private final List<Hotkey> working = new ArrayList<>();
+    private final Model model = new Model();
+    private final JTable table = new JTable(model);
+
+    HotkeysPanel(HotkeyService service) {
+        super(new BorderLayout(6, 6));
+        this.service = service;
+        setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
+
+        synchronized (service.all()) {
+            for (Hotkey h : service.all()) working.add(h.copy());
+        }
+
+        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
+        table.setRowHeight(table.getRowHeight() + 4);
+        table.getColumnModel().getColumn(0).setPreferredWidth(240);
+        table.getColumnModel().getColumn(1).setPreferredWidth(150);
+        table.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                if (e.getClickCount() == 2) edit();
+            }
+        });
+
+        JButton add = new JButton("Add…");
+        JButton edit = new JButton("Edit…");
+        JButton remove = new JButton("Remove");
+        add.addActionListener(e -> add());
+        edit.addActionListener(e -> edit());
+        remove.addActionListener(e -> remove());
+
+        JPanel buttons = new JPanel();
+        buttons.add(add);
+        buttons.add(edit);
+        buttons.add(remove);
+
+        JLabel status = new JLabel(service.status());
+        status.setFont(status.getFont().deriveFont(Font.ITALIC, status.getFont().getSize2D() - 1f));
+
+        add(new JScrollPane(table), BorderLayout.CENTER);
+        JPanel south = new JPanel(new BorderLayout());
+        south.add(buttons, BorderLayout.WEST);
+        south.add(status, BorderLayout.SOUTH);
+        add(south, BorderLayout.SOUTH);
+    }
+
+    private void add() {
+        HotkeyDialog dlg = new HotkeyDialog(owner(), service, null);
+        dlg.setVisible(true);
+        if (!dlg.isConfirmed()) return;
+        working.add(dlg.result());
+        model.fireTableDataChanged();
+    }
+
+    private void edit() {
+        int row = table.getSelectedRow();
+        if (row < 0) return;
+        HotkeyDialog dlg = new HotkeyDialog(owner(), service, working.get(row));
+        dlg.setVisible(true);
+        if (!dlg.isConfirmed()) return;
+        working.set(row, dlg.result());
+        model.fireTableRowsUpdated(row, row);
+    }
+
+    private void remove() {
+        int row = table.getSelectedRow();
+        if (row < 0) return;
+        working.remove(row);
+        model.fireTableDataChanged();
+    }
+
+    private Window owner() {
+        return SwingUtilities.getWindowAncestor(this);
+    }
+
+    /** Commits the edited list to the engine and to disk. */
+    void apply() {
+        service.replaceAll(working);
+    }
+
+    /** Picks the stored bindings up again after something else changed them. */
+    void reload() {
+        working.clear();
+        synchronized (service.all()) {
+            for (Hotkey h : service.all()) working.add(h.copy());
+        }
+        model.fireTableDataChanged();
+    }
+
+    private final class Model extends AbstractTableModel {
+
+        @Override
+        public int getRowCount() {
+            return working.size();
+        }
+
+        @Override
+        public int getColumnCount() {
+            return COLUMNS.length;
+        }
+
+        @Override
+        public String getColumnName(int column) {
+            return COLUMNS[column];
+        }
+
+        @Override
+        public Class<?> getColumnClass(int column) {
+            return column >= 3 ? Boolean.class : String.class;
+        }
+
+        @Override
+        public boolean isCellEditable(int row, int column) {
+            return column == 4 || (column == 3 && working.get(row).isServerScoped());
+        }
+
+        @Override
+        public Object getValueAt(int row, int column) {
+            Hotkey h = working.get(row);
+            return switch (column) {
+                case 0 -> h.path();
+                case 1 -> service.display(h.combo);
+                case 2 -> h.action.momentary() ? "While held" : h.trigger.label();
+                case 3 -> h.isServerScoped() && h.activeServerOnly;
+                default -> h.enabled;
+            };
+        }
+
+        @Override
+        public void setValueAt(Object value, int row, int column) {
+            Hotkey h = working.get(row);
+            if (column == 3) {
+                h.activeServerOnly = Boolean.TRUE.equals(value);
+            } else if (column == 4) {
+                h.enabled = Boolean.TRUE.equals(value);
+            }
+        }
+    }
+}