feat: add crash screen (#10)

Reviewed-on: https://git.reya.su/reya/coop-mobile/pulls/10

composeApp/src/androidMain/kotlin/su/reya/coop/MainActivity.kt

@@ -11,6 +11,7 @@ import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import su.reya.coop.coop.storage.SecretStore
+import kotlin.system.exitProcess
 
 class MainActivity : ComponentActivity() {
     private val viewModel: NostrViewModel by viewModels {
@@ -23,6 +24,26 @@ class MainActivity : ComponentActivity() {
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {
+        Thread.setDefaultUncaughtExceptionHandler { thread, throwable ->
+            throwable.printStackTrace()
+            android.util.Log.e(
+                "CoopCrash",
+                "Uncaught exception in thread ${thread.name}",
+                throwable
+            )
+
+            // Start the Crash Activity
+            val intent = Intent(this, CrashActivity::class.java).apply {
+                putExtra("error", throwable.stackTraceToString())
+                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK)
+            }
+            startActivity(intent)
+
+            // Exit
+            android.os.Process.killProcess(android.os.Process.myPid())
+            exitProcess(1)
+        }
+
         val splashScreen = installSplashScreen()
         enableEdgeToEdge()