feat(debug): GUI toggle for DRED verbose logs + macOS mic permission

DRED verbose logs (off by default — keeps logcat clean in normal use):
- wzp-codec: DRED_VERBOSE_LOGS atomic flag with dred_verbose_logs() /
  set_dred_verbose_logs() helpers
- opus_enc: gate "DRED enabled" + libopus version logs behind the flag
- desktop/src-tauri/engine.rs: gate DredRecvState parse log,
  reconstruction log, classical PLC log, and DRED-counter fields in
  the Android recv heartbeat (non-verbose path still logs basic recv
  stats)
- Tauri commands set_dred_verbose_logs / get_dred_verbose_logs
- Settings panel gets a "DRED debug logs (verbose, dev only)"
  checkbox; preference persists in wzp-settings localStorage and is
  pushed to Rust on save and on app boot

macOS mic permission:
- Add desktop/src-tauri/Info.plist with NSMicrophoneUsageDescription.
  Without it, modern macOS silently denies CoreAudio capture for
  ad-hoc-signed Tauri builds — capture starts but every callback
  hands you zeros. Symptom: phones could not hear desktop client,
  desktop could still hear phones (playout has no TCC gate). The
  Tauri 2 bundler auto-merges this file into WarzonePhone.app's
  Contents/Info.plist on the next build, so first launch will pop
  the standard mic prompt.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

desktop/src-tauri/src/lib.rs

@@ -110,6 +110,22 @@ struct PingResult {
     server_fingerprint: String,
 }
 
+/// Toggle DRED verbose logging at runtime (gates the chatty per-frame
+/// reconstruction + parse logs in opus_enc and engine.rs). Wired to the
+/// "DRED debug logs" checkbox in the GUI settings panel.
+#[tauri::command]
+fn set_dred_verbose_logs(enabled: bool) {
+    wzp_codec::set_dred_verbose_logs(enabled);
+    tracing::info!(enabled, "DRED verbose logs toggled");
+}
+
+/// Read the current DRED verbose logging flag (so the GUI can hydrate
+/// its checkbox on startup without trusting localStorage alone).
+#[tauri::command]
+fn get_dred_verbose_logs() -> bool {
+    wzp_codec::dred_verbose_logs()
+}
+
 /// Ping a relay to check if it's online, measure RTT, and get server identity.
 #[tauri::command]
 async fn ping_relay(relay: String) -> Result<PingResult, String> {
@@ -687,6 +703,7 @@ pub fn run() {
             deregister,
             set_speakerphone, is_speakerphone_on,
             get_call_history, get_recent_contacts, clear_call_history,
+            set_dred_verbose_logs, get_dred_verbose_logs,
         ])
         .run(tauri::generate_context!())
         .expect("error while running WarzonePhone");