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>

crates/wzp-codec/src/lib.rs

@@ -28,6 +28,26 @@ pub use denoise::NoiseSupressor;
 pub use silence::{ComfortNoise, SilenceDetector};
 pub use wzp_proto::{AudioDecoder, AudioEncoder, CodecId, QualityProfile};
 
+use std::sync::atomic::{AtomicBool, Ordering};
+
+/// Global verbose-logging flag for DRED. Off by default — when enabled
+/// (via the GUI debug toggle wired through Tauri), the encoder logs its
+/// DRED config + libopus version, and the recv path logs every DRED
+/// reconstruction, classical PLC fill, and parse heartbeat. Off in
+/// "normal" mode keeps logcat clean.
+static DRED_VERBOSE_LOGS: AtomicBool = AtomicBool::new(false);
+
+/// Returns whether DRED verbose logging is currently enabled.
+#[inline]
+pub fn dred_verbose_logs() -> bool {
+    DRED_VERBOSE_LOGS.load(Ordering::Relaxed)
+}
+
+/// Enable/disable DRED verbose logging at runtime.
+pub fn set_dred_verbose_logs(enabled: bool) {
+    DRED_VERBOSE_LOGS.store(enabled, Ordering::Relaxed);
+}
+
 /// Create an adaptive encoder starting at the given quality profile.
 ///
 /// The returned encoder accepts 48 kHz mono PCM regardless of the active

crates/wzp-codec/src/opus_enc.rs

@@ -186,25 +186,26 @@ impl OpusEncoder {
             .set_packet_loss(DRED_LOSS_FLOOR_PCT)
             .map_err(|e| CodecError::EncodeFailed(format!("set packet loss floor: {e:?}")))?;
 
-        // Bumped from debug! to info! so the DRED config is visible in
-        // logcat without enabling debug-level filtering. Each call's
-        // first OpusEncoder construction will log this; subsequent
-        // profile switches log it again with the new tier.
-        info!(
-            codec = ?codec,
-            dred_frames,
-            dred_ms = dred_frames as u32 * 10,
-            loss_floor_pct = DRED_LOSS_FLOOR_PCT,
-            "opus encoder: DRED enabled"
-        );
+        // Both of these are gated behind the GUI debug toggle so logcat
+        // stays clean in normal mode. Flip "DRED verbose logs" in the
+        // settings panel to see the per-encoder config + libopus version.
+        if crate::dred_verbose_logs() {
+            info!(
+                codec = ?codec,
+                dred_frames,
+                dred_ms = dred_frames as u32 * 10,
+                loss_floor_pct = DRED_LOSS_FLOOR_PCT,
+                "opus encoder: DRED enabled"
+            );
 
-        // One-shot logging of the linked libopus version so we can
-        // confirm at a glance that opusic-c (libopus 1.5.2) is loaded.
-        // Pre-Phase-0 audiopus shipped libopus 1.3 which has no DRED;
-        // if this log says "libopus 1.3" something is very wrong.
-        LIBOPUS_VERSION_LOGGED.get_or_init(|| {
-            info!(libopus_version = %opusic_c::version(), "linked libopus version");
-        });
+            // One-shot logging of the linked libopus version so we can
+            // confirm at a glance that opusic-c (libopus 1.5.2) is loaded.
+            // Pre-Phase-0 audiopus shipped libopus 1.3 which has no DRED;
+            // if this log says "libopus 1.3" something is very wrong.
+            LIBOPUS_VERSION_LOGGED.get_or_init(|| {
+                info!(libopus_version = %opusic_c::version(), "linked libopus version");
+            });
+        }
 
         Ok(())
     }