feat: multi-platform bug fixes, Android audio path, and build tooling

Flutter UI fixes:
- Fix stale channel badge/speaker when moved by others (derive current
  channel from ownClientId instead of optimistic local state)
- Fix Linux PTT via focused fallback key handler
- Distinguish ServerQuery clients with terminal icon in client list
- Reduce duplicate current-channel badge display
- Prevent PTT key-bind save from permanently closing voice settings
- Fix Linux GTK reopen-after-close (quit app on window destroy)
- Fix focused PTT: consume key events, release held keys on
  disconnect/leave-channel/mode/backend changes, suppress stale errors

Flutter Rust bridge:
- Thread is_server_query flag through protocol→bridge→Dart
- Add own_client_id to BridgeSnapshot DTO
- Add log_file_path_str() for platform log path queries

Rust protocol:
- Add ServerQuery test coverage (query_client_type_maps_to_server_query_flag)
- Split reqwest TLS: native-tls for desktop/iOS, rustls for Android

Rust audio:
- Upgrade cpal 0.16→0.17.3 with API adjustments (SampleRate, description())
- Suppress Android-only dead-code warnings (open_log_file, keyring_account)

Android build tooling:
- tools/build-opus-android.sh: NDK auto-discovery, correct CMake
  Android variables (ANDROID_ABI, ANDROID_PLATFORM), portable baseline
- tools/build-android-rust.sh: build+copy Rust cdylib for arm64-v8a,
  armeabi-v7a, x86_64 into android/app/src/main/jniLibs/
- Add jniLibs/ to .gitignore

Rust bridge:
- Guard open_log_file() on non-Android (Android uses logcat)

apps/chanora_flutter/lib/src/rust/api.dart

@@ -338,14 +338,19 @@ class BridgeClient {
   /// Nickname.
   final String name;
 
+  /// True for TeamSpeak ServerQuery clients.
+  final bool isServerQuery;
+
   const BridgeClient({
     required this.id,
     required this.channel,
     required this.name,
+    required this.isServerQuery,
   });
 
   @override
-  int get hashCode => id.hashCode ^ channel.hashCode ^ name.hashCode;
+  int get hashCode =>
+      id.hashCode ^ channel.hashCode ^ name.hashCode ^ isServerQuery.hashCode;
 
   @override
   bool operator ==(Object other) =>
@@ -354,7 +359,8 @@ class BridgeClient {
           runtimeType == other.runtimeType &&
           id == other.id &&
           channel == other.channel &&
-          name == other.name;
+          name == other.name &&
+          isServerQuery == other.isServerQuery;
 }
 
 @freezed