additional functionality

- swipe to delete
- edit
- fixed bug where the category would be the same across listtiles

trackeroo/lib/frontend/utils/transaction_listtile.dart

 import 'package:flutter/material.dart';
+import 'package:trackeroo/frontend/views/edit_transaction_view.dart';
 import 'package:trackeroo/logic/models/category.dart';
 import 'package:trackeroo/logic/models/transaction.dart';
 import 'package:trackeroo/logic/services/categories_controller.dart';
 import 'package:trackeroo/logic/services/locator.dart';
+import 'package:trackeroo/logic/services/transactions_controller.dart';
 
 class TransactionListtile extends StatefulWidget {
   const TransactionListtile({super.key, required this.transaction});
@@ -14,33 +16,60 @@ class TransactionListtile extends StatefulWidget {
 }
 
 class _TransactionListtileState extends State<TransactionListtile> {
-  late Category category;
   final monthsGer = const ['Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember'];
 
-  @override
-  void initState() {
-    category = locator.get<CategoriesController>().categories[widget.transaction.categoryId] ??
-      Category(id: 'no_category', title: '', iconCodePoint: Icons.attach_money_rounded.codePoint, colorValue: Colors.transparent.value);
-    super.initState();
-  }
-
   @override
   Widget build(BuildContext context) {
-    return GestureDetector(
+    Category category = locator.get<CategoriesController>().catBox.get(widget.transaction.categoryId)!;
+    return Padding(
+      padding: const EdgeInsets.only(bottom: 5.0),
+      child: ClipRRect(
+        borderRadius: const BorderRadius.all(Radius.circular(12.0)),
+        child: Dismissible(
+          key: UniqueKey(),
+          direction: DismissDirection.startToEnd,
+          onDismissed: (_) => {
+            locator.get<TransactionsController>().deleteTransaction(widget.transaction),
+            ScaffoldMessenger.of(context).removeCurrentSnackBar(),
+            ScaffoldMessenger.of(context).showSnackBar(
+              SnackBar(
+                content: Text(
+                  'Transaction deleted',
+                  style: TextStyle(
+                    color: Theme.of(context).colorScheme.onSecondary
+                  ),
+                ),
+                backgroundColor: Theme.of(context).colorScheme.secondary,
+                behavior: SnackBarBehavior.floating,
+                shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(8.0))),
+                action: SnackBarAction(
+                  label: 'Undo',
+                  textColor: Theme.of(context).colorScheme.onSecondary,
+                  onPressed: () => locator.get<TransactionsController>().undoLastDeletion()
+                ),
+              )
+            )
+          },
+          background: Container(
+            padding: const EdgeInsets.symmetric(vertical: 10.0, horizontal: 12.0),
+            color: Theme.of(context).colorScheme.errorContainer,
+            alignment: Alignment.centerLeft,
+            child: Icon(
+              Icons.delete,
+              color: Theme.of(context).colorScheme.error,
+            ),
+          ),
+          child: GestureDetector(
             onTap: () => showModalBottomSheet<void>(
               showDragHandle: true,
               context: context,
               builder: (BuildContext context) {
-          return buildModalContent(widget.transaction);
+                return buildModalContent(widget.transaction, category, context);
               },
             ),
             child: Container(
               padding: const EdgeInsets.symmetric(vertical: 10.0, horizontal: 12.0),
-        margin: const EdgeInsets.only(bottom: 5.0),
-        decoration: BoxDecoration(
               color: Theme.of(context).colorScheme.secondaryContainer,
-          borderRadius: const BorderRadius.all(Radius.circular(12.0))
-        ),
               child: Row(
                 mainAxisAlignment: MainAxisAlignment.spaceBetween,
                 children: [
@@ -82,10 +111,13 @@ class _TransactionListtileState extends State<TransactionListtile> {
                 ],
               ),
             ),
+          ),
+        ),
+      ),
     );
   }
 
-  Widget buildModalContent(Transaction transaction) {
+  Widget buildModalContent(Transaction transaction, Category category, BuildContext context) {
     return SizedBox(
       width: double.infinity,
       child: SafeArea(
@@ -164,7 +196,12 @@ class _TransactionListtileState extends State<TransactionListtile> {
                   const SizedBox(width: 10.0),
                   Expanded(
                     child: FilledButton.tonal(
-                      onPressed: () => {},
+                      onPressed: () => {
+                        Navigator.push(
+                          context,
+                          MaterialPageRoute(builder: (context) => EditTransactionView(transaction: transaction))
+                        )
+                      },
                       child: const Row(
                         mainAxisAlignment: MainAxisAlignment.center,
                         children: [