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)

crates/chanora_bridge/src/frb_generated.rs

@@ -1290,10 +1290,12 @@ impl SseDecode for crate::api::BridgeClient {
         let mut var_id = <u64>::sse_decode(deserializer);
         let mut var_channel = <u64>::sse_decode(deserializer);
         let mut var_name = <String>::sse_decode(deserializer);
+        let mut var_isServerQuery = <bool>::sse_decode(deserializer);
         return crate::api::BridgeClient {
             id: var_id,
             channel: var_channel,
             name: var_name,
+            is_server_query: var_isServerQuery,
         };
     }
 }
@@ -1721,6 +1723,7 @@ impl flutter_rust_bridge::IntoDart for crate::api::BridgeClient {
             self.id.into_into_dart().into_dart(),
             self.channel.into_into_dart().into_dart(),
             self.name.into_into_dart().into_dart(),
+            self.is_server_query.into_into_dart().into_dart(),
         ]
         .into_dart()
     }
@@ -1999,6 +2002,7 @@ impl SseEncode for crate::api::BridgeClient {
         <u64>::sse_encode(self.id, serializer);
         <u64>::sse_encode(self.channel, serializer);
         <String>::sse_encode(self.name, serializer);
+        <bool>::sse_encode(self.is_server_query, serializer);
     }
 }