Remember how tall the user made the info panel

Kept as a share of the tree/info column, so it survives new tabs, a resized
window and the next session.

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

ts3-client/core/src/main/java/com/ts3client/config/Settings.java

@@ -139,6 +139,8 @@ public final class Settings {
     public boolean showStatusBar = true;
     /** Whether the Master Volume slider is shown on the toolbar. */
     public boolean showMasterVolumeSlider = true;
+    /** Share of the tree/info column the tree takes, i.e. where their divider sits. */
+    public double infoSplitRatio = 0.68;
 
     /** Which actions make a sound, and which ones are important enough to survive muting. */
     public final NotificationSettings notifications = new NotificationSettings();
@@ -230,6 +232,7 @@ public final class Settings {
         appearance = parseAppearance(props.getProperty("appearance"), appearance);
         showStatusBar = parseB(props.getProperty("showStatusBar"), showStatusBar);
         showMasterVolumeSlider = parseB(props.getProperty("showMasterVolumeSlider"), showMasterVolumeSlider);
+        infoSplitRatio = parseD(props.getProperty("infoSplitRatio"), infoSplitRatio);
         notifications.load(props);
     }
 
@@ -272,6 +275,7 @@ public final class Settings {
         props.setProperty("appearance", appearance.name());
         props.setProperty("showStatusBar", Boolean.toString(showStatusBar));
         props.setProperty("showMasterVolumeSlider", Boolean.toString(showMasterVolumeSlider));
+        props.setProperty("infoSplitRatio", Double.toString(infoSplitRatio));
         notifications.store(props);
     }
 

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

@@ -723,6 +723,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
     private void shutdown() {
         if (!shuttingDown.compareAndSet(false, true)) return;
         if (statusTimer != null) statusTimer.stop();
+        settings.save(); // keeps the layout the user left behind (info panel height, …)
         try {
             Runtime.getRuntime().removeShutdownHook(shutdownHook);
         } catch (IllegalStateException ignored) {

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

@@ -16,6 +16,8 @@ import javax.swing.SwingUtilities;
 import java.util.ArrayList;
 import java.util.List;
 import java.awt.Component;
+import java.awt.event.ComponentAdapter;
+import java.awt.event.ComponentEvent;
 
 /**
  * One server connection and the views bound to it (tree, info and chat). The
@@ -45,6 +47,8 @@ final class ServerTab implements ServerTabConnectionEvents.Listener {
     private JSplitPane leftColumn;
     private int normalDividerSize;
     private int savedDividerLocation = -1;
+    /** Whether the saved divider share has been applied; before that, layout is not the user's doing. */
+    private boolean splitRestored;
 
     /** Label shown in the tab bar: the server name once known, the address before that. */
     private String title = "New connection";
@@ -109,6 +113,16 @@ final class ServerTab implements ServerTabConnectionEvents.Listener {
         leftColumn.setResizeWeight(0.68);
         leftColumn.setContinuousLayout(true);
         normalDividerSize = leftColumn.getDividerSize();
+        // The info panel keeps the height the user gave it, in this tab and the next session.
+        leftColumn.addComponentListener(new ComponentAdapter() {
+            @Override
+            public void componentResized(ComponentEvent e) {
+                if (splitRestored) return;
+                splitRestored = true;
+                leftColumn.setDividerLocation(settings.infoSplitRatio);
+            }
+        });
+        leftColumn.addPropertyChangeListener(JSplitPane.DIVIDER_LOCATION_PROPERTY, e -> rememberSplit());
 
         JSplitPane split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, leftColumn, chatPanel);
         split.setResizeWeight(0.55);
@@ -377,6 +391,19 @@ final class ServerTab implements ServerTabConnectionEvents.Listener {
         treeActions.browseFiles(channel);
     }
 
+    /**
+     * Records where the user put the divider, as a share of the column. Collapsed and
+     * pre-layout positions are not the user's choice, so they are left out.
+     */
+    private void rememberSplit() {
+        if (!splitRestored || !infoPanel.isVisible()) return;
+        int span = leftColumn.getHeight() - leftColumn.getDividerSize();
+        if (span <= 0) return;
+        double ratio = leftColumn.getDividerLocation() / (double) span;
+        if (ratio <= 0.05 || ratio >= 0.98) return;
+        settings.infoSplitRatio = ratio;
+    }
+
     /** Collapses the info panel to nothing while its content lives in the chat tab, or restores it. */
     private void setInfoPanelHidden(boolean hidden) {
         if (hidden == !infoPanel.isVisible()) return;