Add category-list factory and seed categories in B4W smoke test

tests/test_category_edge_cases.py

@@ -3,6 +3,7 @@ from datetime import date
 import pytest
 
 from src.models.category import Category, CategoryBudget
+from tests.factories import CategoryFactory
 
 
 class TestCategoryComputedFields:
@@ -75,7 +76,7 @@ class TestCategoryBudgetValidation:
 
     def test_valid_budget_no_dates(self):
         """Budget with None dates is valid."""
-        cat = Category.from_str("test")
+        cat = CategoryFactory.build()
         budget = CategoryBudget(
             category=cat,
             amount_eur=100.00,
@@ -86,7 +87,7 @@ class TestCategoryBudgetValidation:
     def test_valid_budget_with_dates(self):
         """Budget with valid date range is accepted."""
 
-        cat = Category.from_str("test")
+        cat = CategoryFactory.build()
         budget = CategoryBudget(
             category=cat,
             amount_eur=100.00,
@@ -99,7 +100,7 @@ class TestCategoryBudgetValidation:
     def test_invalid_date_range_raises(self):
         """Budget with valid_from > valid_to raises ValueError."""
 
-        cat = Category.from_str("test")
+        cat = CategoryFactory.build()
 
         with pytest.raises(ValueError) as exc_info:
             CategoryBudget(
@@ -116,7 +117,7 @@ class TestCategoryBudgetValidation:
     def test_valid_budget_exact_boundary(self):
         """Budget with exact same from and to is valid (single day)."""
 
-        cat = Category.from_str("test")
+        cat = CategoryFactory.build()
         budget = CategoryBudget(
             category=cat,
             amount_eur=100.00,
@@ -129,7 +130,7 @@ class TestCategoryBudgetValidation:
     def test_validation_preserves_original_values(self):
         """Validation doesn't change the model's original values."""
 
-        cat = Category.from_str("test")
+        cat = CategoryFactory.build()
         budget = CategoryBudget(
             category=cat,
             amount_eur=150.75,