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/core/src/main/java/com/ts3client/config/Settings.java

@@ -95,6 +95,12 @@ public final class Settings {
     public boolean music = false;
     /** Master playback gain, 0..1 (may exceed 1 for boost up to 2). */
     public double outputVolume = 1.0;
+    /**
+     * Global multiplier on top of {@link #outputVolume} and {@link #soundVolume},
+     * controlled from the toolbar's Master Volume slider so both can be ridden
+     * with one control. 0..2, same boost headroom as the other volumes.
+     */
+    public double masterVolume = 1.0;
     /** Microphone input gain multiplier applied before VAD/encode. */
     public double inputVolume = 1.0;
     /** Remove steady background noise from the microphone (spectral denoise). */
@@ -119,6 +125,12 @@ public final class Settings {
     /** Extra folder to look for icon packs in, on top of the well-known locations. */
     public String iconPackDir = "";
 
+    // ---- window chrome ----
+    /** Whether the status bar at the bottom of the window is shown. */
+    public boolean showStatusBar = true;
+    /** Whether the Master Volume slider is shown on the toolbar. */
+    public boolean showMasterVolumeSlider = true;
+
     /** Which actions make a sound, and which ones are important enough to survive muting. */
     public final NotificationSettings notifications = new NotificationSettings();
 
@@ -155,6 +167,16 @@ public final class Settings {
         return new File(identityFile);
     }
 
+    /** {@link #outputVolume} scaled by the Master Volume slider. */
+    public double effectiveOutputVolume() {
+        return outputVolume * masterVolume;
+    }
+
+    /** {@link #soundVolume} scaled by the Master Volume slider. */
+    public double effectiveSoundVolume() {
+        return soundVolume * masterVolume;
+    }
+
     /** The directory holding all persistent client state (settings, identities, caches). */
     public static File configDir() {
         return DIR;
@@ -185,6 +207,7 @@ public final class Settings {
         packetLoss = parseI(props.getProperty("packetLoss"), packetLoss);
         music = parseB(props.getProperty("music"), music);
         outputVolume = parseD(props.getProperty("outputVolume"), outputVolume);
+        masterVolume = parseD(props.getProperty("masterVolume"), masterVolume);
         inputVolume = parseD(props.getProperty("inputVolume"), inputVolume);
         denoise = parseB(props.getProperty("denoise"), denoise);
         denoiserLevel = parseD(props.getProperty("denoiserLevel"), denoiserLevel);
@@ -195,6 +218,8 @@ public final class Settings {
         soundPackDir = props.getProperty("soundPackDir", soundPackDir);
         iconPack = props.getProperty("iconPack", iconPack);
         iconPackDir = props.getProperty("iconPackDir", iconPackDir);
+        showStatusBar = parseB(props.getProperty("showStatusBar"), showStatusBar);
+        showMasterVolumeSlider = parseB(props.getProperty("showMasterVolumeSlider"), showMasterVolumeSlider);
         notifications.load(props);
     }
 
@@ -223,6 +248,7 @@ public final class Settings {
         props.setProperty("packetLoss", Integer.toString(packetLoss));
         props.setProperty("music", Boolean.toString(music));
         props.setProperty("outputVolume", Double.toString(outputVolume));
+        props.setProperty("masterVolume", Double.toString(masterVolume));
         props.setProperty("inputVolume", Double.toString(inputVolume));
         props.setProperty("denoise", Boolean.toString(denoise));
         props.setProperty("denoiserLevel", Double.toString(denoiserLevel));
@@ -233,6 +259,8 @@ public final class Settings {
         props.setProperty("soundPackDir", soundPackDir);
         props.setProperty("iconPack", iconPack);
         props.setProperty("iconPackDir", iconPackDir);
+        props.setProperty("showStatusBar", Boolean.toString(showStatusBar));
+        props.setProperty("showMasterVolumeSlider", Boolean.toString(showMasterVolumeSlider));
         notifications.store(props);
     }
 

ts3-client/core/src/main/java/com/ts3client/sound/SoundNotifier.java

@@ -113,7 +113,7 @@ public final class SoundNotifier {
         if (script == null) return;
 
         String resolved = script.resolve(withDefaults(variables));
-        double volume = Math.max(0, Math.min(1.0, settings.soundVolume));
+        double volume = Math.max(0, Math.min(1.0, settings.effectiveSoundVolume()));
         if (volume <= 0) return;
 
         if (script.kind() == SoundScript.Kind.SAY) {