Adds removing a monster from the dashboard via long press.

Android/app/src/main/java/com/majinnaibu/monstercards/utils/SnackbarHelper.java

@@ -0,0 +1,53 @@
+package com.majinnaibu.monstercards.utils;
+
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.StringRes;
+
+import com.google.android.material.snackbar.Snackbar;
+
+/**
+ * Centralized helper for managing Snackbar notifications and durations across the app.
+ */
+public class SnackbarHelper {
+    // Configurable default durations in milliseconds
+    public static int DEFAULT_SHORT_DURATION = 2500; // 2.5 seconds
+    public static int DEFAULT_LONG_DURATION = 4000;  // 4.0 seconds (e.g. for Undo or action messages)
+
+    public static Snackbar makeShort(@NonNull View view, @StringRes int resId) {
+        return make(view, view.getContext().getString(resId), DEFAULT_SHORT_DURATION);
+    }
+
+    public static Snackbar makeShort(@NonNull View view, @NonNull CharSequence message) {
+        return make(view, message, DEFAULT_SHORT_DURATION);
+    }
+
+    public static Snackbar makeLong(@NonNull View view, @StringRes int resId) {
+        return make(view, view.getContext().getString(resId), DEFAULT_LONG_DURATION);
+    }
+
+    public static Snackbar makeLong(@NonNull View view, @NonNull CharSequence message) {
+        return make(view, message, DEFAULT_LONG_DURATION);
+    }
+
+    public static Snackbar make(@NonNull View view, @NonNull CharSequence message, int durationMs) {
+        return Snackbar.make(view, message, durationMs);
+    }
+
+    public static void showShort(@NonNull View view, @StringRes int resId) {
+        makeShort(view, resId).show();
+    }
+
+    public static void showShort(@NonNull View view, @NonNull CharSequence message) {
+        makeShort(view, message).show();
+    }
+
+    public static void showLong(@NonNull View view, @StringRes int resId) {
+        makeLong(view, resId).show();
+    }
+
+    public static void showLong(@NonNull View view, @NonNull CharSequence message) {
+        makeLong(view, message).show();
+    }
+}

Android/app/src/main/java/com/majinnaibu/monstercards/utils/ToastHelper.java

@@ -0,0 +1,42 @@
+package com.majinnaibu.monstercards.utils;
+
+import android.content.Context;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.StringRes;
+
+/**
+ * Centralized helper for managing Toast notifications and durations across the app.
+ */
+public class ToastHelper {
+    // Configurable default durations
+    public static int DEFAULT_SHORT_DURATION = Toast.LENGTH_SHORT; // ~2.0 seconds
+    public static int DEFAULT_LONG_DURATION = Toast.LENGTH_LONG;   // ~3.5 seconds
+
+    private static Toast sCurrentToast;
+
+    public static void showShort(@NonNull Context context, @StringRes int resId) {
+        show(context, context.getString(resId), DEFAULT_SHORT_DURATION);
+    }
+
+    public static void showShort(@NonNull Context context, @NonNull String message) {
+        show(context, message, DEFAULT_SHORT_DURATION);
+    }
+
+    public static void showLong(@NonNull Context context, @StringRes int resId) {
+        show(context, context.getString(resId), DEFAULT_LONG_DURATION);
+    }
+
+    public static void showLong(@NonNull Context context, @NonNull String message) {
+        show(context, message, DEFAULT_LONG_DURATION);
+    }
+
+    public static void show(@NonNull Context context, @NonNull String message, int duration) {
+        if (sCurrentToast != null) {
+            sCurrentToast.cancel();
+        }
+        sCurrentToast = Toast.makeText(context.getApplicationContext(), message, duration);
+        sCurrentToast.show();
+    }
+}