feat: state-based D-pad navigation, seek mode, subtitle picker, 20-agent audit fixes

- Replace broken Compose focus system with state-based selectedButton approach
- Add seek mode (DPAD_UP to enter, LEFT/RIGHT to seek, CENTER/DOWN to apply)
- Make SubtitlePickerOverlay state-based (DPAD UP/DOWN navigate, CENTER select)
- Fix 25 P0 crashes from 20-agent audit (SSRF, CancellationException, DTO defaults)
- Fix UX issues: animations, padding, TvErrorDisplay, navigation, finishAffinity
- Fix pause button: remove clickable, onKeyEvent only, repeatCount guard
- Add subtitle extraction: OpenSubtitles EN/ES, HI filtering, dedup
- Fix override accumulation: clearOverridesOfType before setting new tracks
- Disable tunneling for subtitle compatibility
- Performance: AutoHideHolder, @Immutable models, contentType
- Fix SearchScreen focus visibility: animated scale, white border, dimming
- Fix PlayerButton invisible text: white on HorrorGray bg
- Fix isLoading stuck in Home/Detail/SearchViewModel
- Fix VideoExtractor CancellationException rethrow, IMDB_ID_PATTERN 7+ digits

app/proguard-rules.pro

@@ -40,9 +40,6 @@
     @kotlinx.coroutines.InternalCoroutinesApi <methods>;
 }
 
--keep class kotlin.** { *; }
--keep class * implements kotlin.** { *; }
-
 -assumenosideeffects class android.util.Log {
     public static boolean isLoggable(...);
     public static int v(...);
@@ -69,4 +66,25 @@
 -dontwarn javax.annotation.**
 -dontwarn kotlin.Unit
 -dontwarn retrofit2.Platform$Java8
--dontwarn kotlin.jvm.internal.Reflection
+-dontwarn kotlin.jvm.internal.Reflection
+
+# Compose
+-keep class androidx.compose.runtime.CompositionLocal { *; }
+-keepclassmembers class * {
+    @androidx.compose.runtime.Composable <methods>;
+}
+
+# Media3 ExoPlayer
+-keep class androidx.media3.** { *; }
+
+# Jsoup
+-keep class org.jsoup.** { *; }
+
+# Keep generic signature info for Retrofit+Gson
+-keepattributes Signature
+
+# Enums
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}