Process the microphone like TS3, and tell it about key presses

The capture path now runs the ported WebRTC chain in place of the
home-made noise, typing and gain stages, which are removed.

- As in TS3, the speech detector judges the raw microphone signal, while
  the level meter and volume gate see the processed one.
- Noise removal takes TS3's four levels (6, 12, 18 or 21 dB); a stored
  0..1 level falls back to TS3's default of 12 dB.
- Every key press from the global input hook reaches the connected
  microphones and the microphone test, so typing attenuation engages
  while the user types.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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

@@ -95,6 +95,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         this.soundPlayer = audio.createSoundPlayer(settings);
         this.sounds.setPlayer(soundPlayer);
         this.hotkeys = new HotkeyService(new HotkeyActions(this), this::hotkeyArgumentChoices);
+        hotkeys.addKeyPressListener(() -> SwingUtilities.invokeLater(this::keyPressed));
         contacts.addListener(() -> SwingUtilities.invokeLater(this::contactsChanged));
 
         setIconImages(Icons.appImages());
@@ -482,6 +483,15 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         tab.connection().getMicrophone().setPushToTalk(talking);
     }
 
+    /** Tells every connected microphone about a key press, as TS3 tells all its connections. */
+    private void keyPressed() {
+        for (ServerTab tab : tabs) {
+            if (tab.isConnected() && tab.connection().getMicrophone() != null) {
+                tab.connection().getMicrophone().keyPressed();
+            }
+        }
+    }
+
     void moveMicrophoneToSelectedTab() {
         if (selected != null && selected.isConnected()) setMicTab(selected);
         updateToolbar();