Switch chat tabs by clicking them, and tighten their padding

A custom tab component swallows the press, so the tabbed pane never selected
the tab itself; the reorder listener already on every tab part now does it.

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

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

@@ -20,6 +20,7 @@ import java.awt.Component;
 import java.awt.Cursor;
 import java.awt.Dimension;
 import java.awt.FlowLayout;
+import java.awt.Insets;
 import java.awt.Point;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
@@ -77,6 +78,9 @@ public final class ChatPanel extends JPanel {
 
         tabs.setFont(Theme.uiFont());
         tabs.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
+        // Half the look and feel's leading padding: these tabs carry a name that is worth
+        // the width, and their headers bring their own spacing.
+        tabs.putClientProperty("JTabbedPane.tabInsets", new Insets(4, 6, 4, 12));
         addTab(serverTab, false);
         addTab(channelTab, false);
         tabs.setSelectedIndex(0);
@@ -346,10 +350,11 @@ public final class ChatPanel extends JPanel {
         }
 
         Component header(boolean closable) {
-            JPanel p = new JPanel(new FlowLayout(FlowLayout.LEFT, 4, 0));
+            JPanel p = new JPanel(new FlowLayout(FlowLayout.LEFT, 2, 0));
             p.setOpaque(false);
             titleLabel = new JLabel(title, icon, JLabel.LEADING);
             titleLabel.setFont(Theme.uiFont());
+            titleLabel.setIconTextGap(3);
             p.add(titleLabel);
             dragReorder.attach(p);
             dragReorder.attach(titleLabel);
@@ -367,13 +372,6 @@ public final class ChatPanel extends JPanel {
                 });
                 p.add(close);
             }
-            // Clicking the header itself must still switch tabs.
-            p.addMouseListener(new MouseAdapter() {
-                @Override
-                public void mousePressed(MouseEvent e) {
-                    tabs.setSelectedComponent(scroll);
-                }
-            });
             p.setPreferredSize(new Dimension(p.getPreferredSize().width, 20));
             return p;
         }

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

@@ -89,6 +89,12 @@ final class TabDragReorder {
             @Override
             public void mouseReleased(MouseEvent e) {
                 if (dragging) endDrag();
+                // A custom tab component swallows the press, so the tabbed pane never gets
+                // to select the tab itself — a plain click has to do it here.
+                else if (pressSlot >= 0 && pressSlot < tabbed.getTabCount()
+                        && SwingUtilities.isLeftMouseButton(e)) {
+                    tabbed.setSelectedIndex(pressSlot);
+                }
                 pressSlot = -1;
                 dragging = false;
             }