0.2.2 + 0.3.0: remote threading fix, phone-first onboarding, ten-foot settings, self-healing errors, in-app updater, group filter

Squashed history rewrite: earlier revisions of the docs carried private
hostnames; placeholders throughout history now.

- Fix phone remote threading (welcome/get_state/broadcast) — remote connects
  and mirrors channels, Now/Next, favorites
- Phone-first onboarding (ADR-0007): one QR, server URL + IdP login on the
  phone (closes #11)
- Ten-foot settings + Erweitert sub-screen (closes #14), TvTextField D-pad
  focus fix (closes #9)
- EPG grid envelope parsing, Now/Next live (closes #10)
- Self-healing error states (closes #13), in-app updater (closes #12)
- Channel group filter chips fed by Dispatcharr groups

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

app/build.gradle.kts

@@ -12,8 +12,8 @@ android {
         applicationId = "dev.castarr.tv"
         minSdk = 26
         targetSdk = 35
-        versionCode = 4
-        versionName = "0.2.1"
+        versionCode = 6
+        versionName = "0.3.0"
     }
 
     // Release signing from environment (see ~/.keys/castarr-release.env on the
@@ -53,6 +53,7 @@ android {
 
     buildFeatures {
         compose = true
+        buildConfig = true
     }
 
     lint {
@@ -71,6 +72,7 @@ dependencies {
     implementation("androidx.tv:tv-material:1.0.0")
     implementation("androidx.compose.material3:material3")
     implementation("androidx.lifecycle:lifecycle-runtime-compose:2.8.7")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx: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")