Refactor dialog components to use form-container for improved layout and styling; update button styles for consistency

src/Duempelkas.App/Components/Dialogs/AddEntryDialog.razor

@@ -3,34 +3,32 @@
 <div class="dialog-backdrop" @onclick="Cancel">
     <div class="dialog-content" @onclick:stopPropagation="true">
         <h5>@(EditEntry != null ? "Eintrag bearbeiten" : "Neuer Eintrag")</h5>
-        @if (EditEntry == null)
-        {
-            <div class="mb-3">
+
+        <div class="form-container">
+            @if(EditEntry == null) {
                 <label class="form-label">Art</label>
-                <select class="form-select" @bind="entryType">
+                <select @bind="entryType">
                     <option value="@EntryType.Income">Einnahme</option>
                     <option value="@EntryType.Expense">Ausgabe</option>
                 </select>
-            </div>
-        }
-        <div class="mb-3">
+            }
+
             <label class="form-label">Datum</label>
-            <input type="date" class="form-control" @bind="date" />
-        </div>
-        <div class="mb-3">
+            <input type="date" @bind="date" />
+
             <label class="form-label">Bezeichnung</label>
             <input type="text" class="form-control" @bind="title" placeholder="Beschreibung" />
-        </div>
-        <div class="mb-3">
+
             <label class="form-label">Betrag (€)</label>
             <input type="number" class="form-control" @bind="amount" step="0.01" min="0.01" />
         </div>
+
         <div class="d-flex justify-content-end gap-2">
-            <button class="btn btn-outline-secondary" @onclick="Cancel"><i class="bi bi-x-lg"></i> Abbrechen</button>
-            <button class="btn btn-primary" @onclick="Save"
+            <button class="btn btn-success" @onclick="Save"
                     disabled="@(string.IsNullOrWhiteSpace(title) || amount <= 0)">
                 <i class="bi bi-check-lg"></i> @(EditEntry != null ? "Speichern" : "Hinzufügen")
             </button>
+            <button class="btn btn-outline-secondary" @onclick="Cancel"><i class="bi bi-x-lg"></i> Abbrechen</button>
         </div>
     </div>
 </div>