feat: start of pending screen

lib/data/repositories/bal_repository.dart

@@ -22,6 +22,17 @@ class BalRepository {
     }
   }
 
+  Future<Result<List<Bal>>> _getBalsNoCache() async {
+    final result = await _apiClient.getBals();
+    switch (result) {
+      case Ok():
+        _bals = result.value;
+        return Result.ok(result.value);
+      case Error():
+        return result;
+    }
+  }
+
   Future<Result<Bal>> balById(int id) async {
     if (_bals == null) {
       await getBals();
@@ -39,13 +50,20 @@ class BalRepository {
     }
   }
 
-  Future<Result<void>> addBal(String name) async {
-    final result = await _apiClient.addBal(name);
-    switch (result) {
-      case Ok():
-        return result;
-      case Error():
-        return result;
-    }
+  Future<Result<Bal>> editBal(
+    int id,
+    String name,
+    DateTime start,
+    DateTime end,
+  ) async {
+    final result = await _apiClient.editBal(id, name, start, end);
+    _getBalsNoCache();
+    return result;
+  }
+
+  Future<Result<void>> addBal(String name, DateTime start, DateTime end) async {
+    final result = await _apiClient.addBal(name, start, end);
+    _getBalsNoCache();
+    return result;
   }
 }