refactor: convert from Android TV to phone/tablet mode

- Replace Theme.Leanback with Theme.AppCompat.DayNight.NoActionBar
- Remove leanback dependencies (leanback, leanback-preference)
- Remove LEANBACK_LAUNCHER, leanback feature, banner from manifest
- PlayerActivity: replace D-pad with touch controls (click to toggle episodes, close button)
- SearchFragment: adaptive grid (3 cols phone / 5 cols tablet), remove focus-based history toggle
- Fix deprecated adapterPosition -> bindingAdapterPosition

app/src/main/java/com/videoapp/tv/PlayerActivity.kt

@@ -1,11 +1,11 @@
 package com.videoapp.tv
 
 import android.os.Bundle
-import android.view.KeyEvent
 import android.view.View
 import android.webkit.WebView
 import android.webkit.WebViewClient
 import android.widget.Button
+import android.widget.ImageButton
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.lifecycle.lifecycleScope
@@ -15,10 +15,7 @@ import androidx.media3.ui.PlayerView
 import com.videoapp.tv.data.ConfigRepository
 import com.videoapp.tv.engine.Episode
 import com.videoapp.tv.engine.VideoExtractor
-import com.videoapp.tv.engine.WebViewPlayer
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 class PlayerActivity : AppCompatActivity() {
 
@@ -28,15 +25,14 @@ class PlayerActivity : AppCompatActivity() {
     private lateinit var episodeList: android.widget.LinearLayout
     private lateinit var loadingIndicator: View
     private lateinit var errorText: android.widget.TextView
+    private lateinit var btnClose: ImageButton
 
     private var exoPlayer: ExoPlayer? = null
     private val videoExtractor = VideoExtractor()
     private val configRepo by lazy { ConfigRepository(this) }
-    private val webViewPlayer by lazy { WebViewPlayer(this) }
 
     private var episodes: List<Episode> = emptyList()
     private var currentEpisodeIndex = 0
-    private var isPlayerReady = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -48,13 +44,16 @@ class PlayerActivity : AppCompatActivity() {
         episodeList = findViewById(R.id.episode_list)
         loadingIndicator = findViewById(R.id.loading_indicator)
         errorText = findViewById(R.id.error_text)
+        btnClose = findViewById(R.id.btn_close)
 
         val detailUrl = intent.getStringExtra("detail_url") ?: ""
         val title = intent.getStringExtra("title") ?: ""
 
+        btnClose.setOnClickListener { finish() }
+
         initExoPlayer()
         loadVideos(detailUrl, title)
-        setupFullscreenListener()
+        setupTouchListeners()
     }
 
     private fun initExoPlayer() {
@@ -63,7 +62,7 @@ class PlayerActivity : AppCompatActivity() {
         }
     }
 
-    private fun loadVideos(detailUrl: String, title: String) {
+    private fun loadVideos(detailUrl: String, @Suppress("UNUSED_PARAMETER") title: String) {
         showLoading(true)
         val config = configRepo.getConfig()
 
@@ -118,13 +117,10 @@ class PlayerActivity : AppCompatActivity() {
             val (directUrl, iframeUrl) = videoExtractor.extractFromPlayPage(ep.playUrl, config)
 
             if (directUrl != null) {
-                // Play with ExoPlayer
                 playWithExoPlayer(directUrl)
             } else if (iframeUrl != null) {
-                // Play iframe in WebView
                 playWithWebView(iframeUrl)
             } else {
-                // Fallback: load play page in WebView
                 playWithWebView(ep.playUrl)
             }
         }
@@ -189,28 +185,15 @@ class PlayerActivity : AppCompatActivity() {
         showLoading(false)
     }
 
-    private fun setupFullscreenListener() {
-        // Toggle episode panel visibility on dpad up/down
+    private fun setupTouchListeners() {
         var panelVisible = true
         playerView.setOnClickListener {
             panelVisible = !panelVisible
             episodePanel.visibility = if (panelVisible) View.VISIBLE else View.GONE
         }
-    }
-
-    override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
-        return when (keyCode) {
-            KeyEvent.KEYCODE_DPAD_UP -> {
-                episodePanel.visibility = View.VISIBLE
-                true
-            }
-            KeyEvent.KEYCODE_DPAD_DOWN -> {
-                if (episodePanel.visibility == View.VISIBLE) {
-                    episodePanel.visibility = View.GONE
-                }
-                true
-            }
-            else -> super.onKeyDown(keyCode, event)
+        playerWebView.setOnClickListener {
+            panelVisible = !panelVisible
+            episodePanel.visibility = if (panelVisible) View.VISIBLE else View.GONE
         }
     }