Refactor interaction handling with utility for translations

Introduced `TermHelper.Translate` to centralize string mappings for `InteractionType`, reducing duplication across components. Updated related code to leverage this utility and streamline interaction row implementation by removing the `Caption` parameter. Minor UI adjustments were also made to align button positioning and styling.

FoodsharingSiegen.Shared/Helper/TermHelper.cs

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+#nullable enable
+
+using FoodsharingSiegen.Contracts.Entity;
+using FoodsharingSiegen.Contracts.Model;
+
+namespace FoodsharingSiegen.Shared.Helper
+{
+    public static class TermHelper
+    {
+        #region Public Method Translate
+
+        /// <summary>
+        ///     Translates an <see cref="InteractionType" /> instance into a corresponding string representation,
+        ///     using the provided application settings if necessary.
+        /// </summary>
+        /// <param name="type">The interaction type to translate.</param>
+        /// <param name="appSettings">The application settings used for custom translations.</param>
+        /// <returns>A string representation of the specified interaction type.</returns>
+        public static string Translate(this InteractionType type, AppSettings appSettings)
+        {
+            return type switch
+            {
+                InteractionType.EinAb => "Einführung",
+                InteractionType.Welcome => "Begrüßung",
+                InteractionType.IdCheck => "Perso prüfen",
+                InteractionType.PrintPass => "FS-Ausweis (Print)",
+                InteractionType.PdfPass => "FS-Ausweis (PDF)",
+                InteractionType.Verify => "Verifizieren",
+                InteractionType.Complete => "Fertig",
+                InteractionType.StepInBriefing => appSettings.Terms.StepInName ?? "StepIn",
+                InteractionType.ReleasedForVerification => "Freigabe zur Verifizierung",
+                _ => type.ToString()
+            };
+        }
+
+        #endregion
+    }
+}