feat: integrate chat voice and diagnostics client

apps/chanora_flutter/android/app/proguard-rules.pro

@@ -11,8 +11,8 @@
 #      the app module — these are looked up by signature from C/Rust.
 #   3. The Android voice foreground service (SDD-107) — referenced from
 #      the manifest by FQN and from JNI via static start/stop helpers.
-#   4. The Android audio mode controller (SDD-108) — referenced from
-#      JNI via GlobalRef.
+#   4. The Android audio mode controller (SDD-108) — audio mode is
+#      managed in Rust via direct JNI (engine.rs), not a Kotlin class.
 #   5. Kotlin metadata required by FRB-generated bindings (SDD-079).
 
 # --- 1. chanora_bridge / flutter_rust_bridge JNI surface (SDD-105) -----------
@@ -46,21 +46,18 @@
 }
 
 # --- 3. AndroidVoiceForegroundService (SDD-107) ------------------------------
-# The service is referenced by FQN from AndroidManifest.xml and by JNI from
-# the Rust audio engine (start/stop helpers per SDD-107 item 10). Keep the
-# class and its public/static members.
--keep class app.chanora.chanora_flutter.AndroidVoiceForegroundService { *; }
+# Covered by the JNI-surface keep block above.
 
-# --- 4. AndroidAudioModeController (SDD-108) ---------------------------------
-# Referenced from Rust via GlobalRef + static method invocation.
-# Wave 2B-2 owns the class; keep rule is forward-looking but harmless if
-# the class does not yet exist (R8 ignores keep rules for missing classes).
--keep class app.chanora.chanora_flutter.AndroidAudioModeController { *; }
+# --- 4. Android Audio Mode Controller (SDD-108) -------------------------
+# SDD-108 in-call audio mode (AudioManager.setMode) is implemented in the
+# Rust audio engine (crates/chanora_audio/src/engine.rs) via direct JNI,
+# not through a Kotlin controller class. No keep rule is needed; the
+# engine.rs android_set_audio_mode / android_get_audio_mode helpers
+# resolve AudioManager at runtime via ndk_context.
 
 # --- 5. Kotlin metadata + serialisation (SDD-079) ----------------------------
 -keepattributes *Annotation*, Signature, InnerClasses, EnclosingMethod
 -keep class kotlin.Metadata { *; }
 
 # Defer to Flutter's own keep rules for the embedding layer; the Flutter
-# Gradle plugin contributes those automatically. If a future SDD revision
-# disables R8 entirely, this file can be reduced to a single TODO comment.
+# Gradle plugin contributes those automatically.