Resolve map problem.

lib/components/account/add_expense_dialog.dart

@@ -85,6 +85,18 @@ class AddExpenseDialog extends StatefulWidget {
   /// The expense to edit (null for new expense).
   final Expense? expenseToEdit;
 
+  /// Optional initial category for a new expense.
+  final ExpenseCategory? initialCategory;
+
+  /// Optional initial amount for a new expense.
+  final double? initialAmount;
+
+  /// Optional initial splits (userId -> amount) for a new expense.
+  final Map<String, double>? initialSplits;
+
+  /// Optional initial description for a new expense.
+  final String? initialDescription;
+
   /// Creates an AddExpenseDialog.
   ///
   /// [group] is the group for the expense.
@@ -95,6 +107,10 @@ class AddExpenseDialog extends StatefulWidget {
     required this.group,
     required this.currentUser,
     this.expenseToEdit,
+    this.initialCategory,
+    this.initialAmount,
+    this.initialSplits,
+    this.initialDescription,
   });
 
   @override
@@ -146,7 +162,10 @@ class _AddExpenseDialogState extends State<AddExpenseDialog> {
     super.initState();
     // Initialize form fields and splits based on whether editing or creating
     _selectedDate = widget.expenseToEdit?.date ?? DateTime.now();
-    _selectedCategory = widget.expenseToEdit?.category ?? ExpenseCategory.other;
+    _selectedCategory =
+        widget.expenseToEdit?.category ??
+        widget.initialCategory ??
+        ExpenseCategory.other;
     _selectedCurrency = widget.expenseToEdit?.currency ?? ExpenseCurrency.eur;
     _paidById = widget.expenseToEdit?.paidById ?? widget.currentUser.id;
 
@@ -159,9 +178,32 @@ class _AddExpenseDialogState extends State<AddExpenseDialog> {
       }
       _splitEqually = false;
     } else {
-      // Creating: initialize splits for all group members
-      for (final member in widget.group.members) {
-        _splits[member.userId] = 0;
+      // Creating: initialize splits
+      if (widget.initialDescription != null) {
+        _descriptionController.text = widget.initialDescription!;
+      }
+
+      if (widget.initialAmount != null) {
+        _amountController.text = widget.initialAmount.toString();
+      }
+
+      if (widget.initialSplits != null) {
+        _splits.addAll(widget.initialSplits!);
+        // Fill remaining members with 0 if not in initialSplits
+        for (final member in widget.group.members) {
+          if (!_splits.containsKey(member.userId)) {
+            _splits[member.userId] = 0;
+          } else {
+            // If we have specific splits, we probably aren't splitting equally by default logic
+            // unless we want to force it. For reimbursement, we likely set exact amounts.
+            _splitEqually = false;
+          }
+        }
+      } else {
+        // Default behavior: initialize splits for all group members
+        for (final member in widget.group.members) {
+          _splits[member.userId] = 0;
+        }
       }
     }
   }