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/api.rs

@@ -217,6 +217,7 @@ fn log_file_path() -> Option<std::path::PathBuf> {
 /// Open the platform log file in append mode, rotating once on
 /// startup so each launch begins with a fresh file. Best-effort:
 /// returns `None` on any I/O error.
+#[cfg(not(target_os = "android"))]
 fn open_log_file() -> Option<std::fs::File> {
     let path = log_file_path()?;
     if let Some(parent) = path.parent() {
@@ -278,6 +279,8 @@ pub struct BridgeClient {
     pub channel: u64,
     /// Nickname.
     pub name: String,
+    /// True for TeamSpeak ServerQuery clients.
+    pub is_server_query: bool,
 }
 
 /// Server snapshot as seen by Dart.
@@ -325,6 +328,7 @@ impl From<chanora_protocol::ServerSnapshot> for BridgeSnapshot {
                     id: c.id.0,
                     channel: c.channel.0,
                     name: c.name,
+                    is_server_query: c.is_server_query,
                 })
                 .collect(),
             own_client_id: s.own_client_id,