feat: added cards removing

mobile/src/main/java/ru/omni_devel/cards/DbHelper.kt

@@ -78,4 +78,12 @@ class DbHelper(val context: Context, val factory: SQLiteDatabase.CursorFactory?)
 
         return cardInfo
     }
+
+    fun removeCard(id: Int) {
+        val db = this.writableDatabase
+
+        db.delete("cards", "id = ?", arrayOf(id.toString()))
+
+        db.close()
+    }
 }

mobile/src/main/java/ru/omni_devel/cards/MainActivity.kt

@@ -5,6 +5,7 @@ import android.os.Bundle
 import android.view.View
 import android.widget.Button
 import android.widget.LinearLayout
+import android.widget.PopupMenu
 import android.widget.TextView
 import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
@@ -81,6 +82,28 @@ class MainActivity : AppCompatActivity() {
                     startActivity(intent)
                 }
 
+                button.setOnLongClickListener { view ->
+                    val popup = PopupMenu(this, view)
+
+                    popup.menu.add("Remove")
+
+                    popup.setOnMenuItemClickListener { menuItem ->
+                        when (menuItem.title) {
+                            "Remove" -> {
+                                db.removeCard(card.id)
+                                renderCards()
+
+                                true
+                            }
+                            else -> false
+                        }
+                    }
+
+                    popup.show()
+
+                    true
+                }
+
                 cardsList.addView(button)
             }
         }