fix: API compatibility and leanback requirement

- Replace resources.getColor(id, null) with ContextCompat.getColor() for API 21-22 compatibility
- Change android.software.leanback to required=false to allow testing on non-TV emulators

app/src/main/java/com/videoapp/tv/ui/SearchFragment.kt

@@ -13,6 +13,7 @@ import android.widget.Button
 import android.widget.EditText
 import android.widget.TextView
 import android.widget.Toast
+import androidx.core.content.ContextCompat
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.GridLayoutManager
@@ -215,7 +216,7 @@ class SearchFragment : Fragment() {
         for (item in list) {
             val chip = Button(requireContext()).apply {
                 text = item.keyword
-                setTextColor(resources.getColor(R.color.text_primary, null))
+                setTextColor(ContextCompat.getColor(requireContext(), R.color.text_primary))
                 setBackgroundResource(R.drawable.history_chip_selector)
                 textSize = 14f
                 setPadding(24, 8, 24, 8)