Compose for TV UI, generic + Dispatcharr sources, device-flow login, favorites, stream profiles, richer remote

- Compose for TV scaffold: D-pad app shell (Live/Einstellungen), channel list
  with focus handling, fullscreen player with auto-hiding overlay; zapping via
  channel/D-pad keys (closes #2)
- Generic source end-to-end: M3U + XMLTV configurable on the TV, Now/Next with
  progress in the list, channel cache (closes #3)
- OIDC device-flow login: server URL is the only input, issuer/client id come
  from the fork's status endpoint; QR + user code screen, silent refresh,
  logout (closes #4)
- Dispatcharr source via Bearer API: channels, groups, EPG grid; switchable
  against the generic source (closes #5)
- Per-user favorites: star via long-press, favorites filter, backend-synced
  (closes #6)
- Stream profile selection (Standard/Passthrough/audiofix/720p from the
  backend profile list), applied per stream URL (closes #7)
- Phone remote: Now/Next lines, favorites star + filter over the WebSocket
  protocol (closes #8)

Device verification pending (TV currently in use).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/build.gradle.kts

@@ -1,6 +1,7 @@
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
+    id("org.jetbrains.kotlin.plugin.compose")
 }
 
 android {
@@ -50,6 +51,10 @@ android {
     }
 
 
+    buildFeatures {
+        compose = true
+    }
+
     lint {
         // Media3's UI classes are @UnstableApi; the opt-in lint check would
         // otherwise fail release builds.
@@ -59,6 +64,14 @@ android {
 
 dependencies {
     implementation("androidx.core:core-ktx:1.15.0")
+    implementation(platform("androidx.compose:compose-bom:2024.10.01"))
+    implementation("androidx.activity:activity-compose:1.9.3")
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.foundation:foundation")
+    implementation("androidx.tv:tv-material:1.0.0")
+    implementation("androidx.compose.material3:material3")
+    implementation("androidx.lifecycle:lifecycle-runtime-compose:2.8.7")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.9.0")
     implementation("androidx.media3:media3-exoplayer:1.4.1")
     implementation("androidx.media3:media3-exoplayer-hls:1.4.1")
     implementation("androidx.media3:media3-ui:1.4.1")