feat: Add audio playback system with Media3 and comprehensive audio content classification

- Add Media3 dependencies (ExoPlayer, HLS, MediaSession, UI) for audio streaming
- Implement AudioPlayerService as MediaSessionService with foreground playback support
- Create AudioHandler for playback control and AudioMedia domain model with AudioContentType enum
- Add MiniPlayerBar and FullPlayerSheet UI components with play/pause, seek, and navigation controls
- Implement AudioClassifier with strict priority

gradle/libs.versions.toml

@@ -25,6 +25,7 @@ dataStore = "1.0.0"
 kotlinxSerialization = "1.6.2"
 coil = "2.6.0"
 biometric = "1.1.0"
+media3 = "1.2.1"
 
 [libraries]
 material = { group = "com.google.android.material", name = "material", version.ref = "material" }
@@ -87,6 +88,12 @@ kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-
 # Biometric
 androidx-biometric = { group = "androidx.biometric", name = "biometric", version.ref = "biometric" }
 
+# Media3 (ExoPlayer + MediaSession)
+androidx-media3-exoplayer = { group = "androidx.media3", name = "media3-exoplayer", version.ref = "media3" }
+androidx-media3-exoplayer-hls = { group = "androidx.media3", name = "media3-exoplayer-hls", version.ref = "media3" }
+androidx-media3-session = { group = "androidx.media3", name = "media3-session", version.ref = "media3" }
+androidx-media3-ui = { group = "androidx.media3", name = "media3-ui", version.ref = "media3" }
+
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
 jetbrains-kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }