fix(types): resolve pre-existing basedpyright errors in tests

Fix ~790 basedpyright errors across the test suite:
- Type stub subclasses of real production classes with super().__init__()
- Add missing generic type arguments and Dict[str, Any] annotations
- Add None guards before subscript/member access
- Adapt tests to production API changes (removed dead handlers,
  PersistentModelCache.get_default, _i18n_filter_added location)

tests/test_recipe_fts_index_validation.py

@@ -2,7 +2,7 @@
 
 import os
 import tempfile
-from typing import Dict, List
+from typing import Any, Dict, List
 
 import pytest
 
@@ -25,7 +25,7 @@ def temp_db_path():
 
 
 @pytest.fixture
-def sample_recipes() -> List[Dict]:
+def sample_recipes() -> List[Dict[str, Any]]:
     """Create sample recipe data for FTS indexing."""
     return [
         {